前面的博文:WPF+SQL Server 2008 TaskVision Demo小结,写了用WPF和SQL Server 2008实现这个Demo时候遇到的一些有必要说明的地方。如SQL Server的相关设置问题,DataGrid的Binding等...
毕竟那是WPF,其为我们简化了页面的表示,如提供了DataGrid控件扩展了Winform下的DataGridView控件!
那么我们用Winform如何实现相同的功能呢?
下面DebugLZQ来总结下Winform中的DataGridView的使用。
一般用过datagridview控件的人都知道,该控件提供了6种不同的column,vs08、vs10、vs12都是这样,如下:
DebugLZQ写了一个小例子来展示这些column的使用。
我在一个Winform页面上添加了一个datagridview控件,并通过编辑器,添加了7个column,这些column包含了以上所有的6中DataGridViewColumn。如下:
我们来看下用法:
private void Form3_Load(object sender, EventArgs e) { LoadData(); dataGridView1.AutoGenerateColumns = false; } /////1.DataGridView各种Column使用 //可添加CellContentClick事件根据列进行相应的处理 /// private void LoadData() { //演示DataGridView各种Colum使用 dataGridView1.AutoGenerateColumns = false; DataTable dataTable = SQLHelper.GetDataTable("select * from tb_TaskInfo"); //dataGridView1.DataSource = dataTable; dataGridView1.Rows.Add(dataTable.Rows.Count); for (int i = 0; i < dataTable.Rows.Count; i++) { dataGridView1.Rows[i].Cells["Id"].Value = dataTable.Rows[i].ItemArray[0].ToString();//DataGridViewTextBoxColumn dataGridView1.Rows[i].Cells["PLevel"].Value = Image.FromFile(dataTable.Rows[i].ItemArray[9].ToString());//DataGridViewImageColumn dataGridView1.Rows[i].Cells["Distribution"].Value = dataTable.Rows[i].ItemArray[2].ToString();//DataGridViewLinkColumn dataGridView1.Rows[i].Cells["Abstract"].Value = dataTable.Rows[i].ItemArray[3].ToString(); dataGridView1.Rows[i].Cells["State"].Value = dataTable.Rows[i].ItemArray[4].ToString();//DataGridViewComboBoxColumn if (dataTable.Rows[i].ItemArray[4].ToString() == "Open") { dataGridView1.Rows[i].Cells["State2"].Value = true;//DataGridViewCheckBoxColumn } else { dataGridView1.Rows[i].Cells["State2"].Value = false; } dataGridView1.Rows[i].Cells["Rate"].Value = dataTable.Rows[i].ItemArray[5].ToString() + "%";//DataGridViewButtonColumn } }
需要对鼠标点击事件进行处理的话,我们可以添加类似CellContentClick事件,定位具体列、单元格等进行相应的处理。
其运行效果如下:
其数据库表数据格式如下:
上面的运行图只是演示下如何用自带的各种Column,奇丑无比不谈,还没有实现相应的功能,比如说我们最后一列的百分。
一般情况下,我们可以在使用datagridview自带Column的基础上,通过datagridview的cellpainting事件,来进行处理,实现一些特殊的功能。
添加dataGridView1的CellPainting事件,事件处理如下:
//2.有特别需要的地方用CellPainting事件进行重绘 private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e) { if (e.RowIndex >= 0 && e.ColumnIndex == 6) { int rate = Convert.ToInt32(dataGridView1.Rows[e.RowIndex].Cells["Rate"].Value.ToString().Substring(0, dataGridView1.Rows[e.RowIndex].Cells["Rate"].Value.ToString().Length - 1)); Rectangle newRect = new Rectangle(e.CellBounds.X, e.CellBounds.Y, rate, e.CellBounds.Height); using (Brush gridBrush = new SolidBrush(dataGridView1.GridColor), backColorBrush = new SolidBrush(e.CellStyle.BackColor)) { using (Pen gridLinePen = new Pen(gridBrush, 2)) { // Erase the cell. e.Graphics.FillRectangle(backColorBrush, e.CellBounds); //划线 Point p1 = new Point(e.CellBounds.Left + e.CellBounds.Width, e.CellBounds.Top); Point p2 = new Point(e.CellBounds.Left + e.CellBounds.Width, e.CellBounds.Top + e.CellBounds.Height); Point p3 = new Point(e.CellBounds.Left, e.CellBounds.Top + e.CellBounds.Height); Point[] ps = new Point[] { p1, p2, p3 }; e.Graphics.DrawLines(gridLinePen, ps); //画多边形 e.Graphics.DrawRectangle(Pens.LightBlue, newRect); e.Graphics.FillRectangle(Brushes.LightBlue, newRect); //画字符串 e.Graphics.DrawString(rate.ToString() + "%", e.CellStyle.Font, Brushes.Crimson, e.CellBounds.Left + 20, e.CellBounds.Top + 5, StringFormat.GenericDefault); e.Handled = true; } } } }
一般的用法就是这样。
界面丑?
我们来美化下:
主要的美化方法是:
去掉自动生成的第一列 :RowHeadersVisible=false;
隔行变色:设置以下2个属性
dataGridViewX1.RowsDefaultCellStyle.BackColor ;
dataGridViewX1.AlternatingRowsDefaultCellStyle.BackColor ;
设置行选中:SelectionMode=FullRowSelect;
禁止改变列高:AllowUserToResizeRows = False
鼠标经过改变形状及颜色:后面有代码。
都是一些datagridview的小细节,无伤大雅,重点不在这。内在的东西才最重要!
还是有点丑?
再来美化下,加个皮肤吧----这个DebugLZQ千米的博文有介绍。
效果如下:
界面这下差不多OK了。是不是有点像WPF搞得?
貌似有点跑的远了,光盯着界面了。我们来总结下:
datagridview为我们提供了6种自带的Column,不能满足要求的话,我们可以通过datagridview的CellPainting事件绘制,来实现一些特别的需求。
当然针对上面的Form2,DebugLZQ只是用了DataGridViewTextBoxColumn+CellPainting来实现的。
实现过程如下:
1.定义DataGridView的列,注意这个DataPropertyName:设置显示DataTable中的列名。
注意设置:dataGridView1.AutoGenerateColumns = false;来禁止datagridView自动为我们添加列。
2.数据绑定及CellPainting事件处理如下:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace TaskVision_V_1_WinForm { public partial class Form2 : Form { public Form2() { InitializeComponent(); imageComboBoxUserControl1.Items.Add(new ImageComboBoxUserControl.ItemEx("Major", Image.FromFile("Images/Major.gif"))); imageComboBoxUserControl1.Items.Add(new ImageComboBoxUserControl.ItemEx("Medium", Image.FromFile("Images/Medium.gif"))); imageComboBoxUserControl1.Items.Add(new ImageComboBoxUserControl.ItemEx("Minor", Image.FromFile("Images/Minor.gif"))); } private void Form2_Load(object sender, EventArgs e) { dataGridView1.AutoGenerateColumns = false; DataTable dataTable = SQLHelper.GetDataTable("select * from tb_TaskInfo"); dataGridView1.DataSource = dataTable; } private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e) { //第2列改成显示图片 if (e.RowIndex >= 0 && e.ColumnIndex == 1) { if (dataGridView1.Rows[e.RowIndex].Cells["PLevel"].Value == DBNull.Value) return; string imagePath = "Images/" + dataGridView1.Rows[e.RowIndex].Cells["PLevel"].Value + ".gif"; if (imagePath == "Images/.gif") return; Image img = Image.FromFile(imagePath); Rectangle newRect = new Rectangle(e.CellBounds.X, e.CellBounds.Y, e.CellBounds.Height, e.CellBounds.Height); using (Brush gridBrush = new SolidBrush(dataGridView1.GridColor), backColorBrush = new SolidBrush(e.CellStyle.BackColor)) { using (Pen gridLinePen = new Pen(gridBrush, 2)) { // Erase the cell. e.Graphics.FillRectangle(backColorBrush, e.CellBounds); //划线 Point p1 = new Point(e.CellBounds.Left + e.CellBounds.Width, e.CellBounds.Top); Point p2 = new Point(e.CellBounds.Left + e.CellBounds.Width, e.CellBounds.Top + e.CellBounds.Height); Point p3 = new Point(e.CellBounds.Left, e.CellBounds.Top + e.CellBounds.Height); Point[] ps = new Point[] { p1, p2, p3 }; e.Graphics.DrawLines(gridLinePen, ps); //画图标 e.Graphics.DrawImage(img, newRect); ////画字符串 //e.Graphics.DrawString(dataGridView1.Rows[e.RowIndex].Cells["PLevel"].Value.ToString(), e.CellStyle.Font, Brushes.Crimson, // e.CellBounds.Left + 20, e.CellBounds.Top + 5, StringFormat.GenericDefault); e.Handled = true; } } } //第6列改成图形百分比 else if (e.RowIndex >= 0 && e.ColumnIndex == 5) { int rate = Convert.ToInt32(dataGridView1.Rows[e.RowIndex].Cells["Rate"].Value); Rectangle newRect = new Rectangle(e.CellBounds.X, e.CellBounds.Y, rate, e.CellBounds.Height); using (Brush gridBrush = new SolidBrush(dataGridView1.GridColor), backColorBrush = new SolidBrush(e.CellStyle.BackColor)) { using (Pen gridLinePen = new Pen(gridBrush, 2)) { // Erase the cell. e.Graphics.FillRectangle(backColorBrush, e.CellBounds); //划线 Point p1 = new Point(e.CellBounds.Left + e.CellBounds.Width, e.CellBounds.Top); Point p2 = new Point(e.CellBounds.Left + e.CellBounds.Width, e.CellBounds.Top + e.CellBounds.Height); Point p3 = new Point(e.CellBounds.Left, e.CellBounds.Top + e.CellBounds.Height); Point[] ps = new Point[] { p1, p2, p3 }; e.Graphics.DrawLines(gridLinePen, ps); //画多边形 e.Graphics.DrawRectangle(Pens.LightBlue, newRect); e.Graphics.FillRectangle(Brushes.LightBlue, newRect); //画字符串 e.Graphics.DrawString(rate.ToString() + "%", e.CellStyle.Font, Brushes.Crimson, e.CellBounds.Left + 20, e.CellBounds.Top + 5, StringFormat.GenericDefault); e.Handled = true; } } } } private void button1_Click(object sender, EventArgs e) { //get/set imageComboBoxUserControl1.SelectedIndex = 2; MessageBox.Show(imageComboBoxUserControl1.SelectedItem.ToString()); } ///////////////////////////////////// //设置鼠标经过改变颜色 Color colorTmp = Color.White; // 用来记录先前的颜色值 private void dataGridView1_CellMouseEnter(object sender, DataGridViewCellEventArgs e) { if (e.RowIndex >= 0) { colorTmp = dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor; dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.Red; } } private void dataGridView1_CellMouseLeave(object sender, DataGridViewCellEventArgs e) { if (e.RowIndex >= 0) { dataGridView1.Rows[e.RowIndex].DefaultCellStyle.BackColor = colorTmp; } } } }
页面中多了一些代码?是LZ为了模仿WPF的ComboBox自定义的ImageComboBoxUserControl控件,
该自定义ImageComboBoxUserControl控件,让ComboBox中同时显示图片和文字。
其源码如下,控件的使用方法见上面的代码。
using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; using System.Drawing.Drawing2D; namespace TaskVision_V_1_WinForm { public partial class ImageComboBoxUserControl : ComboBox { public ImageComboBoxUserControl() { //InitializeComponent(); DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed; DropDownStyle = ComboBoxStyle.DropDownList; ItemHeight = 30; Width = 80; } protected override void OnDrawItem(DrawItemEventArgs e) { if (Items.Count == 0 || e.Index == -1) return; if ((e.State & DrawItemState.Selected) != 0) { //渐变画刷 LinearGradientBrush brush = new LinearGradientBrush(e.Bounds, Color.FromArgb(255, 251, 237), Color.FromArgb(255, 236, 181), LinearGradientMode.Vertical); //填充区域 Rectangle borderRect = new Rectangle(3, e.Bounds.Y, e.Bounds.Width - 5, e.Bounds.Height - 2); e.Graphics.FillRectangle(brush, borderRect); //画边框 Pen pen = new Pen(Color.FromArgb(229, 195, 101)); e.Graphics.DrawRectangle(pen, borderRect); } else { SolidBrush brush = new SolidBrush(Color.FromArgb(255, 255, 255)); e.Graphics.FillRectangle(brush, e.Bounds); } //获得项图片,绘制图片 ItemEx item = (ItemEx)Items[e.Index]; Image img = item.Image; //图片绘制的区域 Rectangle imgRect = new Rectangle(6, e.Bounds.Y + 3, 30, 30); e.Graphics.DrawImage(img, imgRect); //文本内容显示区域 Rectangle textRect = new Rectangle(imgRect.Right + 2, imgRect.Y, e.Bounds.Width - imgRect.Width, e.Bounds.Height - 2); //获得项文本内容,绘制文本 String itemText = Items[e.Index].ToString(); //文本格式垂直居中 StringFormat strFormat = new StringFormat(); strFormat.LineAlignment = StringAlignment.Center; e.Graphics.DrawString(itemText, new Font("微软雅黑", 12), Brushes.Black, textRect, strFormat); base.OnDrawItem(e); } public class ItemEx { public ItemEx(string text, Image img) { Text = text; Image = img; } public string Text { get; set; } public Image Image { get; set; } public override string ToString() { return Text; } } } }
这样就用Winform从技术上重新实现了前面的WPF+SQL Server 2008的TaskVision。
感受的是Winform datagridview和WPF datagrid的使用,区别,及两种不同的界面驱动编码方式。
关于:实现Winform自定义控件ImageComboBoxUserControl,也可以参考DebugLZQ前面的一篇博文:在Winform窗体中使用WPF控件(附源码)
关于:DataGridView控件默认只支持DataGridViewButtonColumn、DataGridViewCheckBoxColumn、DataGridViewComboBoxColumn、DataGridViewImageColumn、DataGridViewLinkColumn和DataGridViewTextBoxColumn六种列类型,如果你想要在DataGridView的列中添加其它的子控件,则需要自己实现DataGridViewColumn和DataGridViewCell。可参考:C# WinForm下DataGridView单选按钮列和支持三种选择状态的复选框列的实现
另外:直接在datagridview中编辑,批量更新。如下:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; namespace TaskVision_V_1_WinForm { public partial class Form4 : Form { public Form4() { InitializeComponent(); } private DataTable dt = new DataTable(); private SqlDataAdapter sda = new SqlDataAdapter(); private Boolean isUpdate = false; private void Form4_Load(object sender, EventArgs e) { LoadData(); } private void LoadData() { dataGridView1.AutoGenerateColumns = false; SqlConnection conn = new SqlConnection(@"server=LocalHost;database=TaskVision;Trusted_Connection=SSPI"); SqlCommand cmd = new SqlCommand("select * from tb_TaskInfo ", conn); sda.SelectCommand = cmd; sda.Fill(dt); dataGridView1.DataSource = dt; } private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e) { isUpdate = true; } ////// 直接在datagridview中进行批量修改 /// private void button1_Click(object sender, EventArgs e) { if (isUpdate) { try { SqlCommandBuilder SCB = new SqlCommandBuilder(sda); sda.Update(dt); isUpdate = false; } catch (System.Exception ex) { MessageBox.Show(ex.ToString()); return; } MessageBox.Show("更新成功! "); } else { MessageBox.Show("没有更新内容! "); } } } }