c# winform 关于DataGridView的一些操作

 

设置字段名
设置字段值
设定单元格表示 Error图标
设定当前单元格
取得当前单元格内容
取得当前单元格的列 Index
取得当前单元格的行 Index
向下一行
向上一行
取消 DataGridView1 为只读
设置 DataGridView1 为只读
设置 DataGridView1 的第2列整列单元格为只读并变色
设置 DataGridView1 的第3行整行单元格为只读并变色
设置 DataGridView1 的[0，0]单元格为只读并变色
设置 DataGridView1 的第2列整列单元格为只读并变色
设置 DataGridView1 的第3行整行单元格为只读并变色
设置 DataGridView1 的[0，0]单元格为只读并变色
设置用户不能手动给 DataGridView1 添加新行
设置用户可以手动给 DataGridView1 添加新行
禁止DataGridView1的行删除操作。
允许DataGridView1的行删除操作。
DataGridView1的第一列隐藏
DataGridView1的第一行隐藏
DataGridView1的第一列显示
DataGridView1的第一行显示
列头隐藏
行头隐藏
列头显示
行头显示
删除名为"Column1"的列
删除第四列
删除第三行
禁止用户改变DataGridView1的所有列的列宽
禁止用户改变DataGridView1的所有行的行高
允许用户改变DataGridView1的所有列的列宽
允许用户改变DataGridView1的所有行的行高
禁止用户改变DataGridView1的第一列的列宽
禁止用户改变DataGridView1的第一列的行宽
第一列的最小列宽设定为 100
第一行的最小行高设定为 50
禁止用户改变列头的高度
禁止用户改变行头的宽度
设定包括Header和所有单元格的列宽自动调整
设定包括Header和所有单元格的行高自动调整
第一列自动调整
设定列头的宽度可以自动调整
设定行头的宽度可以自动调整
让 DataGridView1 的所有列宽自动调整一下。
让 DataGridView1 的第三列的列宽自动调整一下。
让 DataGridView1 的所有行高自动调整一下。
让 DataGridView1 的第一行的行高自动调整一下。
列头高度自动调整
行头宽度自动调整
DataGridView1的左侧2列固定
DataGridView1 的上3行固定
改变DataGridView1的第一列列头内容
改变DataGridView1的第一行行头内容
改变DataGridView1的左上头部单元内容
改变DataGridView1的第二列列头内容
当前单元格是否选择的判断
获取剪切板的内容，并按行分割
是否是列头
按 Tab 分割数据
行头设定
单元格内容设定
DataGridView的行索引+1
设定单元格的ToolTip内容
设定列头的单元格的ToolTip内容
设定行头的单元格的ToolTip内容
DataGridView 的 ContextMenuStrip 设定
列的 ContextMenuStrip 设定
列头的 ContextMenuStrip 设定
行的 ContextMenuStrip 设定
单元格的 ContextMenuStrip 设定
列头的ContextMenuStrip设定
行头的ContextMenuStrip设定
如果单元格值是整数时
当"Column1"列是Bool型且为True时、设定其的ContextMenuStrip
如果单元格是“Column1”列的单元格
将单元格值改为大写
应用该Format，Format完毕。
单元格列为“Column2”时
将单元格值设为大写
解析完毕
设定单元格的默认值
单元格值为负整数时，Error图标被表示。
行的错误提示的设定
验证通过的话，则清空行的错误提示

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;



using System.Data.OracleClient;


using System.IO;
using System.Data.OleDb;

namespace TestMouseMove
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
            dgvLoad();
        }

        public void dgvLoad()
        {
            this.DataGridView1.Columns[0].HeaderCell.Value = "姓名";
            this.DataGridView1.Columns[1].HeaderCell.Value = "字段2";
            this.DataGridView1.Columns[2].HeaderCell.Value = "字段3";
            this.DataGridView1.Columns[3].HeaderCell.Value = "字段4";
            this.DataGridView1.Columns[4].HeaderCell.Value = "字段5";

            this.DataGridView1.Rows.Add("黑色头发", "1行2列", "1行3列", "1行4列", "1行5列");
            this.DataGridView1.Rows.Add("紫色头发", "2行2列aaaa", "2行3列", "2行4列", "2行5列");
            this.DataGridView1.Rows.Add("蓝色头发", "3行2列", "3行3列", "3行4列", "3行5列");
            this.DataGridView1.Rows.Add("红色头发", "4行2列", "4行3列", "4行4列", "4行5列");
            this.DataGridView1.Rows.Add("棕色头发", "5行2列", "5行3列", "5行4列", "5行5列");

            DataGridView1.ShowCellErrors = true;
            //设定 (0, 0) 的单元格表示 Error图标
            DataGridView1[3, 3].ErrorText = "这是单元格提示错误信息,也可以再行头显示这个错误提示信息";

            //设定第4行(Index=3)的行头显示Error图标
            //DataGridView1.Rows[0].ErrorText = "不能输入负值。";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // 设定 (1, 2) 为当前单元格
            DataGridView1.CurrentCell = DataGridView1[1, 2];
        }

        private void button2_Click(object sender, EventArgs e)
        {
            // 取得当前单元格内容
            MessageBox.Show(DataGridView1.CurrentCell.Value.ToString());
            // 取得当前单元格的列 Index
            MessageBox.Show(DataGridView1.CurrentCell.ColumnIndex.ToString());
            // 取得当前单元格的行 Index
            MessageBox.Show(DataGridView1.CurrentCell.RowIndex.ToString());
        }

        /// <summary>
        /// 向下遍历
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            int row = this.DataGridView1.CurrentRow.Index + 1;
            if (row > this.DataGridView1.RowCount - 1)
                row = 0;
            this.DataGridView1.CurrentCell = this.DataGridView1[0, row];
        }

        /// <summary>
        /// 向上遍历
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            int row = this.DataGridView1.CurrentRow.Index - 1;
            if (row < 0)
                row = this.DataGridView1.RowCount - 1;
            this.DataGridView1.CurrentCell = this.DataGridView1[0, row];
        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (DataGridView1.ReadOnly)
            {
                // 取消 DataGridView1 为只读
                DataGridView1.ReadOnly = false;
                DataGridView1.DefaultCellStyle.BackColor = Color.White;
            }
            else
            {
                // 设置 DataGridView1 为只读
                DataGridView1.ReadOnly = true;
                DataGridView1.DefaultCellStyle.BackColor = Color.Gainsboro;
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (DataGridView1.Columns[1].ReadOnly)
            {
                // 设置 DataGridView1 的第2列整列单元格为只读并变色
                DataGridView1.Columns[1].ReadOnly = false;
                DataGridView1.Columns[1].DefaultCellStyle.BackColor = Color.White;
                // 设置 DataGridView1 的第3行整行单元格为只读并变色
                DataGridView1.Rows[2].ReadOnly = false;
                DataGridView1.Rows[2].DefaultCellStyle.BackColor = Color.White;
                // 设置 DataGridView1 的[0，0]单元格为只读并变色
                DataGridView1[0, 0].ReadOnly = false;
                DataGridView1.Rows[0].Cells[0].Style.BackColor = Color.White;
            }
            else
            {
                // 设置 DataGridView1 的第2列整列单元格为只读并变色
                DataGridView1.Columns[1].ReadOnly = true;
                DataGridView1.Columns[1].DefaultCellStyle.BackColor = Color.Gainsboro;
                // 设置 DataGridView1 的第3行整行单元格为只读并变色
                DataGridView1.Rows[2].ReadOnly = true;
                DataGridView1.Rows[2].DefaultCellStyle.BackColor = Color.Gainsboro;
                // 设置 DataGridView1 的[0，0]单元格为只读并变色
                DataGridView1[0, 0].ReadOnly = true;
                DataGridView1.Rows[0].Cells[0].Style.BackColor = Color.Gainsboro;
            }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (DataGridView1.EditMode.Equals(DataGridViewEditMode.EditOnEnter))
            {
                DataGridView1.EditMode = DataGridViewEditMode.EditProgrammatically;
                DataGridView1.DefaultCellStyle.BackColor = Color.Red;
            }
            else
            {
                DataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;
                DataGridView1.DefaultCellStyle.BackColor = Color.White;
            }
        }

        private void button8_Click(object sender, EventArgs e)
        {
            DataGridView1.Rows[DataGridView1.CurrentCell.RowIndex].Cells[DataGridView1.CurrentCell.ColumnIndex].Style.BackColor = Color.White;
            DataGridView1.BeginEdit(true);
        }

        private void button9_Click(object sender, EventArgs e)
        {
            if (DataGridView1.AllowUserToAddRows)
            {
                // 设置用户不能手动给 DataGridView1 添加新行
                DataGridView1.AllowUserToAddRows = false;
            }
            else
            {
                // 设置用户可以手动给 DataGridView1 添加新行
                DataGridView1.AllowUserToAddRows = true;
            }
        }

        private void button10_Click(object sender, EventArgs e)
        {
            if (DataGridView1.AllowUserToDeleteRows)
            {
                // 禁止DataGridView1的行删除操作。
                DataGridView1.AllowUserToDeleteRows = false;
                DataGridView1.DefaultCellStyle.BackColor = Color.Wheat;
            }
            else
            {
                // 允许DataGridView1的行删除操作。
                DataGridView1.AllowUserToDeleteRows = true;
                DataGridView1.DefaultCellStyle.BackColor = Color.White;
            }
        }

        private void button11_Click(object sender, EventArgs e)
        {
            if (DataGridView1.Columns[0].Visible)
            {
                // DataGridView1的第一列隐藏
                DataGridView1.Columns[0].Visible = false;
                // DataGridView1的第一行隐藏
                DataGridView1.Rows[0].Visible = false;
            }
            else
            {
                // DataGridView1的第一列显示
                DataGridView1.Columns[0].Visible = true;
                // DataGridView1的第一行显示
                DataGridView1.Rows[0].Visible = true;
            }
        }

        private void button12_Click(object sender, EventArgs e)
        {
            if (DataGridView1.ColumnHeadersVisible)
            {
                // 列头隐藏
                DataGridView1.ColumnHeadersVisible = false;
                // 行头隐藏
                DataGridView1.RowHeadersVisible = false;
            }
            else
            {
                // 列头显示
                DataGridView1.ColumnHeadersVisible = true;
                // 行头显示
                DataGridView1.RowHeadersVisible = true;
            }
        }

        private void button13_Click(object sender, EventArgs e)
        {
            // 删除名为"Column1"的列
            DataGridView1.Columns.Remove("Column1");
            // 删除第四列
            DataGridView1.Columns.RemoveAt(2);
            // 删除第三行
            DataGridView1.Rows.RemoveAt(2);
        }

        private void button14_Click(object sender, EventArgs e)
        {
            foreach (DataGridViewRow r in DataGridView1.SelectedRows)
            {
                if (!r.IsNewRow)
                {
                    DataGridView1.Rows.Remove(r);
                }
            }
        }

        private void button15_Click(object sender, EventArgs e)
        {
            if (DataGridView1.AllowUserToResizeColumns)
            {
                // 禁止用户改变DataGridView1的所有列的列宽
                DataGridView1.AllowUserToResizeColumns = false;
                //禁止用户改变DataGridView1的所有行的行高
                DataGridView1.AllowUserToResizeRows = false;
            }
            else
            {
                // 允许用户改变DataGridView1的所有列的列宽
                DataGridView1.AllowUserToResizeColumns = true;
                // 允许用户改变DataGridView1的所有行的行高
                DataGridView1.AllowUserToResizeRows = true;
            }
        }

        private void button16_Click(object sender, EventArgs e)
        {
            // 禁止用户改变DataGridView1的第一列的列宽
            DataGridView1.Columns[0].Resizable = DataGridViewTriState.False;
            // 禁止用户改变DataGridView1的第一列的行宽
            DataGridView1.Rows[0].Resizable = DataGridViewTriState.False;
        }

        private void button17_Click(object sender, EventArgs e)
        {
            // 第一列的最小列宽设定为 100
            DataGridView1.Columns[0].MinimumWidth = 200;
            // 第一行的最小行高设定为 50
            DataGridView1.Rows[0].MinimumHeight = 50;
        }

        private void button18_Click(object sender, EventArgs e)
        {
            // 禁止用户改变列头的高度
            DataGridView1.ColumnHeadersHeightSizeMode =
            DataGridViewColumnHeadersHeightSizeMode.DisableResizing;
            // 禁止用户改变行头的宽度
            DataGridView1.RowHeadersWidthSizeMode =
            DataGridViewRowHeadersWidthSizeMode.DisableResizing;
        }

        private void button19_Click(object sender, EventArgs e)
        {
            // 设定包括Header和所有单元格的列宽自动调整
            DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
            // 设定包括Header和所有单元格的行高自动调整
            DataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
        }

        private void button20_Click(object sender, EventArgs e)
        {
            // 第一列自动调整
            DataGridView1.Columns[0].AutoSizeMode =
            DataGridViewAutoSizeColumnMode.DisplayedCells;
        }

        private void button21_Click(object sender, EventArgs e)
        {
            // 设定列头的宽度可以自动调整
            DataGridView1.ColumnHeadersHeightSizeMode =
            DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            // 设定行头的宽度可以自动调整
            DataGridView1.RowHeadersWidthSizeMode =
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
        }

        private void button22_Click(object sender, EventArgs e)
        {
            // 让 DataGridView1 的所有列宽自动调整一下。
            DataGridView1.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
        }

        private void button23_Click(object sender, EventArgs e)
        {
            // 让 DataGridView1 的第三列的列宽自动调整一下。
            DataGridView1.AutoResizeColumn(2, DataGridViewAutoSizeColumnMode.AllCells);
        }

        private void button24_Click(object sender, EventArgs e)
        {
            // 让 DataGridView1 的所有行高自动调整一下。
            DataGridView1.AutoResizeRows(DataGridViewAutoSizeRowsMode.AllCells);
            //让 DataGridView1 的第一行的行高自动调整一下。
            DataGridView1.AutoResizeRow(0, DataGridViewAutoSizeRowMode.AllCells);
        }

        private void button25_Click(object sender, EventArgs e)
        {
            // 列头高度自动调整
            DataGridView1.AutoResizeColumnHeadersHeight();
            // 行头宽度自动调整
            DataGridView1.AutoResizeRowHeadersWidth(
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders);
        }

        private void button26_Click(object sender, EventArgs e)
        {
            // DataGridView1的左侧2列固定
            DataGridView1.Columns[1].Frozen = true;
            DataGridView1.Columns[2].Width = 800;
        }

        private void button27_Click(object sender, EventArgs e)
        {
            // DataGridView1 的上3行固定
            DataGridView1.Rows[2].Frozen = true;
            DataGridView1.Rows[3].Height = 500;
        }

        private void button28_Click(object sender, EventArgs e)
        {
            DataGridView1.AllowUserToOrderColumns = true;
        }

        private void button29_Click(object sender, EventArgs e)
        {
            // 改变DataGridView1的第一列列头内容
            DataGridView1.Columns[0].HeaderCell.Value = "第一列";
            // 改变DataGridView1的第一行行头内容
            DataGridView1.Rows[0].HeaderCell.Value = "第一行";
            // 改变DataGridView1的左上头部单元内容
            DataGridView1.TopLeftHeaderCell.Value = "左上";

            // 改变DataGridView1的第二列列头内容
            DataGridView1.Columns[1].HeaderText = "第二列";
        }

        private void button30_Click(object sender, EventArgs e)
        {
            Clipboard.SetDataObject(DataGridView1.GetClipboardContent());
        }

        private void button31_Click(object sender, EventArgs e)
        {
            //当前单元格是否选择的判断
            if (DataGridView1.CurrentCell == null)
            {
                return;
            }
            int insertRowIndex = DataGridView1.CurrentCell.RowIndex;
            int insertColumnsIndex = DataGridView1.CurrentCell.ColumnIndex;
            // 获取剪切板的内容，并按行分割
            string pasteText = Clipboard.GetText();
            if (string.IsNullOrEmpty(pasteText))
            {
                return;
            }
            pasteText = pasteText.Replace(" ", " ");
            pasteText = pasteText.Replace(' ', ' ');
            pasteText.TrimEnd(new char[] { ' ' });
            string[] lines = pasteText.Split(' ');
            bool isHeader = false;
            foreach (string line in lines)
            {
                // 是否是列头
                if (isHeader)
                {
                    isHeader = false;
                    continue;
                }
                // 按 Tab 分割数据
                string[] vals = line.Split(' ');
                DataGridViewRow row = DataGridView1.Rows[insertRowIndex];
                // 行头设定
                //row.HeaderCell.Value = vals[0];
                // 单元格内容设定
                for (int i = 0; i < vals.Length; i++)
                {
                    row.Cells[insertColumnsIndex].Value = vals[i];
                }
                // DataGridView的行索引+1
                insertRowIndex++;
            }
        }

        private void button32_Click(object sender, EventArgs e)
        {
            // 设定单元格的ToolTip内容
            DataGridView1[0, 0].ToolTipText = "该单元格的内容不能修改";
            // 设定列头的单元格的ToolTip内容
            DataGridView1.Columns[0].ToolTipText = "该列只能输入数字";
            // 设定行头的单元格的ToolTip内容
            DataGridView1.Rows[0].HeaderCell.ToolTipText = "该行单元格内容不能修改";

            DataGridView1.VirtualMode = false;
            DataGridView1.ShowCellToolTips = true;

        }

        private void DataGridView1_CellToolTipTextNeeded(object sender, DataGridViewCellToolTipTextNeededEventArgs e)
        {
            MessageBox.Show(e.ToolTipText = e.ColumnIndex.ToString() + ", " + e.RowIndex.ToString());

        }

        private void button33_Click(object sender, EventArgs e)
        {
            // DataGridView 的 ContextMenuStrip 设定
            DataGridView1.ContextMenuStrip = this.ContextMenuStrip1;
            // 列的 ContextMenuStrip 设定
            DataGridView1.Columns[0].ContextMenuStrip = this.ContextMenuStrip2;
            // 列头的 ContextMenuStrip 设定
            DataGridView1.Columns[0].HeaderCell.ContextMenuStrip = this.ContextMenuStrip2;
            // 行的 ContextMenuStrip 设定
            DataGridView1.Rows[0].ContextMenuStrip = this.ContextMenuStrip3;
            // 单元格的 ContextMenuStrip 设定
            DataGridView1[0, 0].ContextMenuStrip = this.ContextMenuStrip4;
        }

        private void DataGridView1_CellContextMenuStripNeeded(object sender, DataGridViewCellContextMenuStripNeededEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;
            if (e.RowIndex < 0)
            {
                // 列头的ContextMenuStrip设定
                e.ContextMenuStrip = this.ContextMenuStrip1;
            }
            else if (e.ColumnIndex < 0)
            {
                // 行头的ContextMenuStrip设定
                e.ContextMenuStrip = this.ContextMenuStrip2;
            }
            else if (dgv[e.ColumnIndex, e.RowIndex].Value is int)
            {
                // 如果单元格值是整数时
                e.ContextMenuStrip = this.ContextMenuStrip3;
            }
        }

        private void DataGridView1_RowContextMenuStripNeeded(object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;
            // 当"Column1"列是Bool型且为True时、设定其的ContextMenuStrip
            object boolVal = dgv["Column1", e.RowIndex].Value;
            Console.WriteLine(boolVal);
            if (boolVal is bool && (bool)boolVal)
            {
                e.ContextMenuStrip = this.ContextMenuStrip1;
            }
        }

        private void button34_Click(object sender, EventArgs e)
        {
            DataGridView1.BorderStyle = BorderStyle.None;
        }

        private void button35_Click(object sender, EventArgs e)
        {
            DataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.SunkenVertical;
        }

        private void button36_Click(object sender, EventArgs e)
        {
            DataGridView1.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Sunken;
        }

        private void button37_Click(object sender, EventArgs e)
        {
            DataGridView1.RowHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;
        }

        private void button38_Click(object sender, EventArgs e)
        {
            DataGridView1.GridColor = Color.Red;
        }

        private void button40_Click(object sender, EventArgs e)
        {
            //foreach (Control c in this.Controls)
            //{
            //    c.Dispose();    //如果有Panel等窗口的话,还得将子控件给 Dispose掉
            //}

            DataGridView1.Dispose();

            InitializeComponent();
            dgvLoad();
        }

        private void DataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;
            // 如果单元格是“Column1”列的单元格
            if (e.ColumnIndex < 0)
            {
                return;
            }
            if (dgv.Columns[e.ColumnIndex].Name == "Column1" && e.Value is string)
            {
                // 将单元格值改为大写
                string str = e.Value.ToString();
                e.Value = str.ToUpper();
                // 应用该Format，Format完毕。
                e.FormattingApplied = true;
            }
        }

        private void DataGridView1_CellParsing(object sender, DataGridViewCellParsingEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;
            //单元格列为“Column2”时
            if (dgv.Columns[e.ColumnIndex].Name == "Column2" && e.Value is string)
            {
                //将单元格值设为大写
                e.Value = e.Value.ToString().ToUpper();
                //解析完毕
                e.ParsingApplied = true;
            }
        }

        private void DataGridView1_DefaultValuesNeeded(object sender, DataGridViewRowEventArgs e)
        {
            // 设定单元格的默认值
            e.Row.Cells["Column1"].Value = "我";
            e.Row.Cells["Column2"].Value = "是";
            e.Row.Cells["Column3"].Value = "默";
            e.Row.Cells["Column4"].Value = "认";
            e.Row.Cells["Column5"].Value = "值";
        }

        private void DataGridView1_CellErrorTextNeeded(object sender, DataGridViewCellErrorTextNeededEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;
            // 单元格值为负整数时，Error图标被表示。
            object cellVal = dgv[e.ColumnIndex, e.RowIndex].Value;
            if (cellVal is int && ((int)cellVal) < 0)
            {
                e.ErrorText = "不能输入负整数。";
            }
        }

        private void DataGridView1_RowErrorTextNeeded(object sender, DataGridViewRowErrorTextNeededEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;
            if (dgv["Column1", e.RowIndex].Value == DBNull.Value &&
            dgv["Column2", e.RowIndex].Value == DBNull.Value)
            {
                e.ErrorText =
                "Column1和Column2必须输入一个值。";
            }
        }

        private void DataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;

            if (dgv.Columns[e.ColumnIndex].Name == "Column4" && e.FormattedValue.ToString() == "")
            {
                //行的错误提示的设定
                dgv.Rows[e.RowIndex].ErrorText = "值未输入。";
                //取消已经输入的内容，还原成上次的输入内容。
                //dgv.CancelEdit()
                //取消之后的动作
                e.Cancel = true;
            }
        }

        private void DataGridView1_CellValidated(object sender, DataGridViewCellEventArgs e)
        {
            DataGridView dgv = (DataGridView)sender;
            //验证通过的话，则清空行的错误提示
            dgv.Rows[e.RowIndex].ErrorText = null;
        }


    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;



using System.Data.OracleClient;

   
using System.IO;  
using System.Data.OleDb; 

namespace TestMouseMove
{
	public partial class Form3 : Form
	{
		public Form3()
		{
			InitializeComponent();
			dgvLoad();
		}

		public void dgvLoad()
		{
			this.DataGridView1.Columns[0].HeaderCell.Value = "姓名";
			this.DataGridView1.Columns[1].HeaderCell.Value = "字段2";
			this.DataGridView1.Columns[2].HeaderCell.Value = "字段3";
			this.DataGridView1.Columns[3].HeaderCell.Value = "字段4";
			this.DataGridView1.Columns[4].HeaderCell.Value = "字段5";

			this.DataGridView1.Rows.Add("黑色头发", "1行2列", "1行3列", "1行4列", "1行5列");
			this.DataGridView1.Rows.Add("紫色头发", "2行2列aaaa", "2行3列", "2行4列", "2行5列");
			this.DataGridView1.Rows.Add("蓝色头发", "3行2列", "3行3列", "3行4列", "3行5列");
			this.DataGridView1.Rows.Add("红色头发", "4行2列", "4行3列", "4行4列", "4行5列");
			this.DataGridView1.Rows.Add("棕色头发", "5行2列", "5行3列", "5行4列", "5行5列");

			DataGridView1.ShowCellErrors = true;
			//设定 (0, 0) 的单元格表示 Error图标
			DataGridView1[3, 3].ErrorText = "这是单元格提示错误信息,也可以再行头显示这个错误提示信息";

			//设定第4行(Index=3)的行头显示Error图标
			//DataGridView1.Rows[0].ErrorText = "不能输入负值。";
		}

		private void button1_Click(object sender, EventArgs e)
		{
			// 设定 (1, 2) 为当前单元格
			DataGridView1.CurrentCell = DataGridView1[1, 2];			
		}

		private void button2_Click(object sender, EventArgs e)
		{
			// 取得当前单元格内容
			MessageBox.Show(DataGridView1.CurrentCell.Value.ToString());
			// 取得当前单元格的列 Index
			MessageBox.Show(DataGridView1.CurrentCell.ColumnIndex.ToString());
			// 取得当前单元格的行 Index
			MessageBox.Show(DataGridView1.CurrentCell.RowIndex.ToString());
		}

		/// <summary>
		/// 向下遍历
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void button3_Click(object sender, EventArgs e)
		{
			int row = this.DataGridView1.CurrentRow.Index + 1;
			if (row > this.DataGridView1.RowCount - 1)
				row = 0;
			this.DataGridView1.CurrentCell = this.DataGridView1[0, row];
		}

		/// <summary>
		/// 向上遍历
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void button4_Click(object sender, EventArgs e)
		{
			int row = this.DataGridView1.CurrentRow.Index - 1;
			if (row < 0)
				row = this.DataGridView1.RowCount - 1;
			this.DataGridView1.CurrentCell = this.DataGridView1[0, row];
		}

		private void button5_Click(object sender, EventArgs e)
		{
			if (DataGridView1.ReadOnly)
			{
				// 取消 DataGridView1 为只读
				DataGridView1.ReadOnly = false;
				DataGridView1.DefaultCellStyle.BackColor = Color.White;
			}
			else
			{
				// 设置 DataGridView1 为只读
				DataGridView1.ReadOnly = true;
				DataGridView1.DefaultCellStyle.BackColor = Color.Gainsboro;
			}
		}

		private void button6_Click(object sender, EventArgs e)
		{
			if (DataGridView1.Columns[1].ReadOnly)
			{
				// 设置 DataGridView1 的第2列整列单元格为只读并变色
				DataGridView1.Columns[1].ReadOnly = false;
				DataGridView1.Columns[1].DefaultCellStyle.BackColor = Color.White;
				// 设置 DataGridView1 的第3行整行单元格为只读并变色
				DataGridView1.Rows[2].ReadOnly = false;
				DataGridView1.Rows[2].DefaultCellStyle.BackColor = Color.White;
				// 设置 DataGridView1 的[0，0]单元格为只读并变色
				DataGridView1[0, 0].ReadOnly = false;
				DataGridView1.Rows[0].Cells[0].Style.BackColor = Color.White; 
			}
			else
			{
				// 设置 DataGridView1 的第2列整列单元格为只读并变色
				DataGridView1.Columns[1].ReadOnly = true;
				DataGridView1.Columns[1].DefaultCellStyle.BackColor = Color.Gainsboro;
				// 设置 DataGridView1 的第3行整行单元格为只读并变色
				DataGridView1.Rows[2].ReadOnly = true;
				DataGridView1.Rows[2].DefaultCellStyle.BackColor = Color.Gainsboro;
				// 设置 DataGridView1 的[0，0]单元格为只读并变色
				DataGridView1[0, 0].ReadOnly = true;
				DataGridView1.Rows[0].Cells[0].Style.BackColor = Color.Gainsboro; 
			}
		}

		private void button7_Click(object sender, EventArgs e)
		{
			if (DataGridView1.EditMode.Equals(DataGridViewEditMode.EditOnEnter))
			{
				DataGridView1.EditMode = DataGridViewEditMode.EditProgrammatically;
				DataGridView1.DefaultCellStyle.BackColor = Color.Red;
			}
			else
			{
				DataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;
				DataGridView1.DefaultCellStyle.BackColor = Color.White;
			}
		}

		private void button8_Click(object sender, EventArgs e)
		{
			DataGridView1.Rows[DataGridView1.CurrentCell.RowIndex].Cells[DataGridView1.CurrentCell.ColumnIndex].Style.BackColor = Color.White;
			DataGridView1.BeginEdit(true);
		}

		private void button9_Click(object sender, EventArgs e)
		{
			if (DataGridView1.AllowUserToAddRows)
			{
				// 设置用户不能手动给 DataGridView1 添加新行
				DataGridView1.AllowUserToAddRows = false;
			}
			else
			{
				// 设置用户可以手动给 DataGridView1 添加新行
				DataGridView1.AllowUserToAddRows = true;
			}
		}

		private void button10_Click(object sender, EventArgs e)
		{
			if (DataGridView1.AllowUserToDeleteRows)
			{
				// 禁止DataGridView1的行删除操作。
				DataGridView1.AllowUserToDeleteRows = false;
				DataGridView1.DefaultCellStyle.BackColor = Color.Wheat;
			}
			else
			{
				// 允许DataGridView1的行删除操作。
				DataGridView1.AllowUserToDeleteRows = true;
				DataGridView1.DefaultCellStyle.BackColor = Color.White;
			}
		}

		private void button11_Click(object sender, EventArgs e)
		{
			if (DataGridView1.Columns[0].Visible)
			{
				// DataGridView1的第一列隐藏
				DataGridView1.Columns[0].Visible = false;
				// DataGridView1的第一行隐藏
				DataGridView1.Rows[0].Visible = false;
			}
			else
			{
				// DataGridView1的第一列显示
				DataGridView1.Columns[0].Visible = true;
				// DataGridView1的第一行显示
				DataGridView1.Rows[0].Visible = true;
			}
		}

		private void button12_Click(object sender, EventArgs e)
		{
			if (DataGridView1.ColumnHeadersVisible)
			{
				// 列头隐藏
				DataGridView1.ColumnHeadersVisible = false;
				// 行头隐藏
				DataGridView1.RowHeadersVisible = false;
			}
			else
			{
				// 列头显示
				DataGridView1.ColumnHeadersVisible = true;
				// 行头显示
				DataGridView1.RowHeadersVisible = true;
			}
		}

		private void button13_Click(object sender, EventArgs e)
		{
			// 删除名为"Column1"的列
			DataGridView1.Columns.Remove("Column1");
			// 删除第四列
			DataGridView1.Columns.RemoveAt(2);
			// 删除第三行
			DataGridView1.Rows.RemoveAt(2);
		}

		private void button14_Click(object sender, EventArgs e)
		{
			foreach (DataGridViewRow r in DataGridView1.SelectedRows)
			{
				if (!r.IsNewRow)
				{
					DataGridView1.Rows.Remove(r);
				}
			}
		}

		private void button15_Click(object sender, EventArgs e)
		{
			if (DataGridView1.AllowUserToResizeColumns)
			{
				// 禁止用户改变DataGridView1的所有列的列宽
				DataGridView1.AllowUserToResizeColumns = false;
				//禁止用户改变DataGridView1的所有行的行高
				DataGridView1.AllowUserToResizeRows = false;
			}
			else
			{
				// 允许用户改变DataGridView1的所有列的列宽
				DataGridView1.AllowUserToResizeColumns = true;
				// 允许用户改变DataGridView1的所有行的行高
				DataGridView1.AllowUserToResizeRows = true;
			}
		}

		private void button16_Click(object sender, EventArgs e)
		{
			// 禁止用户改变DataGridView1的第一列的列宽
			DataGridView1.Columns[0].Resizable = DataGridViewTriState.False;
			// 禁止用户改变DataGridView1的第一列的行宽
			DataGridView1.Rows[0].Resizable = DataGridViewTriState.False;
		}

		private void button17_Click(object sender, EventArgs e)
		{
			// 第一列的最小列宽设定为 100
			DataGridView1.Columns[0].MinimumWidth = 200;
			// 第一行的最小行高设定为 50
			DataGridView1.Rows[0].MinimumHeight = 50;
		}

		private void button18_Click(object sender, EventArgs e)
		{
			// 禁止用户改变列头的高度
			DataGridView1.ColumnHeadersHeightSizeMode =
			DataGridViewColumnHeadersHeightSizeMode.DisableResizing;
			// 禁止用户改变行头的宽度
			DataGridView1.RowHeadersWidthSizeMode =
			DataGridViewRowHeadersWidthSizeMode.DisableResizing;
		}

		private void button19_Click(object sender, EventArgs e)
		{
			// 设定包括Header和所有单元格的列宽自动调整
			DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
			// 设定包括Header和所有单元格的行高自动调整
			DataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
		}

		private void button20_Click(object sender, EventArgs e)
		{
			// 第一列自动调整
			DataGridView1.Columns[0].AutoSizeMode =
			DataGridViewAutoSizeColumnMode.DisplayedCells;
		}

		private void button21_Click(object sender, EventArgs e)
		{
			// 设定列头的宽度可以自动调整
			DataGridView1.ColumnHeadersHeightSizeMode =
			DataGridViewColumnHeadersHeightSizeMode.AutoSize;
			// 设定行头的宽度可以自动调整
			DataGridView1.RowHeadersWidthSizeMode =
			DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
		}

		private void button22_Click(object sender, EventArgs e)
		{
			// 让 DataGridView1 的所有列宽自动调整一下。
			DataGridView1.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
		}

		private void button23_Click(object sender, EventArgs e)
		{
			// 让 DataGridView1 的第三列的列宽自动调整一下。
			DataGridView1.AutoResizeColumn(2, DataGridViewAutoSizeColumnMode.AllCells);
		}

		private void button24_Click(object sender, EventArgs e)
		{
			// 让 DataGridView1 的所有行高自动调整一下。
			DataGridView1.AutoResizeRows(DataGridViewAutoSizeRowsMode.AllCells);
			//让 DataGridView1 的第一行的行高自动调整一下。
			DataGridView1.AutoResizeRow(0, DataGridViewAutoSizeRowMode.AllCells);
		}

		private void button25_Click(object sender, EventArgs e)
		{
			// 列头高度自动调整
			DataGridView1.AutoResizeColumnHeadersHeight();
			// 行头宽度自动调整
			DataGridView1.AutoResizeRowHeadersWidth(
			DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders);
		}

		private void button26_Click(object sender, EventArgs e)
		{
			// DataGridView1的左侧2列固定
			DataGridView1.Columns[1].Frozen = true;
			DataGridView1.Columns[2].Width = 800;
		}

		private void button27_Click(object sender, EventArgs e)
		{
			// DataGridView1 的上3行固定
			DataGridView1.Rows[2].Frozen = true;
			DataGridView1.Rows[3].Height = 500;
		}

		private void button28_Click(object sender, EventArgs e)
		{
			DataGridView1.AllowUserToOrderColumns = true;
		}

		private void button29_Click(object sender, EventArgs e)
		{
			// 改变DataGridView1的第一列列头内容
			DataGridView1.Columns[0].HeaderCell.Value = "第一列";
			// 改变DataGridView1的第一行行头内容
			DataGridView1.Rows[0].HeaderCell.Value = "第一行";
			// 改变DataGridView1的左上头部单元内容
			DataGridView1.TopLeftHeaderCell.Value = "左上";

			// 改变DataGridView1的第二列列头内容
			DataGridView1.Columns[1].HeaderText = "第二列";
		}

		private void button30_Click(object sender, EventArgs e)
		{
			Clipboard.SetDataObject(DataGridView1.GetClipboardContent());
		}

		private void button31_Click(object sender, EventArgs e)
		{
			//当前单元格是否选择的判断
			if (DataGridView1.CurrentCell == null)
			{
				return;
			}
			int insertRowIndex = DataGridView1.CurrentCell.RowIndex;
			int insertColumnsIndex = DataGridView1.CurrentCell.ColumnIndex;
			// 获取剪切板的内容，并按行分割
			string pasteText = Clipboard.GetText();
			if (string.IsNullOrEmpty(pasteText))
			{
				return;
			}
			pasteText = pasteText.Replace(" ", " ");
			pasteText = pasteText.Replace(' ', ' ');
			pasteText.TrimEnd(new char[] { ' ' });
			string[] lines = pasteText.Split(' ');
			bool isHeader = false;
			foreach (string line in lines)
			{
				// 是否是列头
				if (isHeader)
				{
					isHeader = false;
					continue;
				}
				// 按 Tab 分割数据
				string[] vals = line.Split(' ');
				DataGridViewRow row = DataGridView1.Rows[insertRowIndex];
				// 行头设定
				//row.HeaderCell.Value = vals[0];
				// 单元格内容设定
				for (int i = 0; i < vals.Length; i++)
				{
					row.Cells[insertColumnsIndex].Value = vals[i];
				}
				// DataGridView的行索引+1
				insertRowIndex++;
			}
		}

		private void button32_Click(object sender, EventArgs e)
		{
			// 设定单元格的ToolTip内容
			DataGridView1[0, 0].ToolTipText = "该单元格的内容不能修改";
			// 设定列头的单元格的ToolTip内容
			DataGridView1.Columns[0].ToolTipText = "该列只能输入数字";
			// 设定行头的单元格的ToolTip内容
			DataGridView1.Rows[0].HeaderCell.ToolTipText = "该行单元格内容不能修改";

			DataGridView1.VirtualMode = false;
			DataGridView1.ShowCellToolTips = true;
			
		}

		private void DataGridView1_CellToolTipTextNeeded(object sender, DataGridViewCellToolTipTextNeededEventArgs e)
		{
			MessageBox.Show(e.ToolTipText = e.ColumnIndex.ToString() + ", " + e.RowIndex.ToString());

		}

		private void button33_Click(object sender, EventArgs e)
		{
			// DataGridView 的 ContextMenuStrip 设定
			DataGridView1.ContextMenuStrip = this.ContextMenuStrip1;
			// 列的 ContextMenuStrip 设定
			DataGridView1.Columns[0].ContextMenuStrip = this.ContextMenuStrip2;
			// 列头的 ContextMenuStrip 设定
			DataGridView1.Columns[0].HeaderCell.ContextMenuStrip = this.ContextMenuStrip2;
			// 行的 ContextMenuStrip 设定
			DataGridView1.Rows[0].ContextMenuStrip = this.ContextMenuStrip3;
			// 单元格的 ContextMenuStrip 设定
			DataGridView1[0, 0].ContextMenuStrip = this.ContextMenuStrip4;
		}

		private void DataGridView1_CellContextMenuStripNeeded(object sender, DataGridViewCellContextMenuStripNeededEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;
			if (e.RowIndex < 0)
			{
				// 列头的ContextMenuStrip设定
				e.ContextMenuStrip = this.ContextMenuStrip1;
			}
			else if (e.ColumnIndex < 0)
			{
				// 行头的ContextMenuStrip设定
				e.ContextMenuStrip = this.ContextMenuStrip2;
			}
			else if (dgv[e.ColumnIndex, e.RowIndex].Value is int)
			{
				// 如果单元格值是整数时
				e.ContextMenuStrip = this.ContextMenuStrip3;
			}
		}

		private void DataGridView1_RowContextMenuStripNeeded(object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;
			// 当"Column1"列是Bool型且为True时、设定其的ContextMenuStrip
			object boolVal = dgv["Column1", e.RowIndex].Value;
			Console.WriteLine(boolVal);
			if (boolVal is bool && (bool)boolVal)
			{
				e.ContextMenuStrip = this.ContextMenuStrip1;
			}
		}

		private void button34_Click(object sender, EventArgs e)
		{
			DataGridView1.BorderStyle = BorderStyle.None;
		}

		private void button35_Click(object sender, EventArgs e)
		{
			DataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.SunkenVertical;
		}

		private void button36_Click(object sender, EventArgs e)
		{
			DataGridView1.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Sunken;
		}

		private void button37_Click(object sender, EventArgs e)
		{
			DataGridView1.RowHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;
		}

		private void button38_Click(object sender, EventArgs e)
		{
			DataGridView1.GridColor = Color.Red;
		}

		private void button40_Click(object sender, EventArgs e)
		{
			//foreach (Control c in this.Controls)
			//{
			//    c.Dispose();    //如果有Panel等窗口的话,还得将子控件给 Dispose掉
			//}

			DataGridView1.Dispose();
			
			InitializeComponent();
			dgvLoad();
		}

		private void DataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;
			// 如果单元格是“Column1”列的单元格
			if (e.ColumnIndex < 0)
			{
				return;
			}
			if (dgv.Columns[e.ColumnIndex].Name == "Column1" && e.Value is string)
			{
				// 将单元格值改为大写
				string str = e.Value.ToString();
				e.Value = str.ToUpper();
				// 应用该Format，Format完毕。
				e.FormattingApplied = true;
			}
		}

		private void DataGridView1_CellParsing(object sender, DataGridViewCellParsingEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;
			//单元格列为“Column2”时
			if (dgv.Columns[e.ColumnIndex].Name == "Column2" && e.Value is string)
			{
				//将单元格值设为大写
				e.Value = e.Value.ToString().ToUpper();
				//解析完毕
				e.ParsingApplied = true;
			}
		}

		private void DataGridView1_DefaultValuesNeeded(object sender, DataGridViewRowEventArgs e)
		{
			// 设定单元格的默认值
			e.Row.Cells["Column1"].Value = "我";
			e.Row.Cells["Column2"].Value = "是";
			e.Row.Cells["Column3"].Value = "默";
			e.Row.Cells["Column4"].Value = "认";
			e.Row.Cells["Column5"].Value = "值";
		}

		private void DataGridView1_CellErrorTextNeeded(object sender, DataGridViewCellErrorTextNeededEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;
			// 单元格值为负整数时，Error图标被表示。
			object cellVal = dgv[e.ColumnIndex, e.RowIndex].Value;
			if (cellVal is int && ((int)cellVal) < 0)
			{
				e.ErrorText = "不能输入负整数。";
			}
		}

		private void DataGridView1_RowErrorTextNeeded(object sender, DataGridViewRowErrorTextNeededEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;
			if (dgv["Column1", e.RowIndex].Value == DBNull.Value &&
			dgv["Column2", e.RowIndex].Value == DBNull.Value)
			{
				e.ErrorText =
				"Column1和Column2必须输入一个值。";
			}
		}

		private void DataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;

			if (dgv.Columns[e.ColumnIndex].Name == "Column4" && e.FormattedValue.ToString() == "")
			{
				//行的错误提示的设定
				dgv.Rows[e.RowIndex].ErrorText = "值未输入。";
				//取消已经输入的内容，还原成上次的输入内容。
				//dgv.CancelEdit()
				//取消之后的动作
				e.Cancel = true;
			}
		}

		private void DataGridView1_CellValidated(object sender, DataGridViewCellEventArgs e)
		{
			DataGridView dgv = (DataGridView)sender;
			//验证通过的话，则清空行的错误提示
			dgv.Rows[e.RowIndex].ErrorText = null;
		}

		
	}
}