C# winform DataGridView 操作大全
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http://blog.csdn.net/ibmfahsion 张迅雷总结: -------------------------------------------------------------------------------- C# DataGridView控件动态添加新行DataGridView控件在实际应用中非常实用,特别需要表格显示数据时。可以静态绑定数据源,这样就自动为DataGridView控件添加相应的行。假如需要动态为DataGridView控件添加新行,方法有很多种,下面简单介绍如何为DataGridView控件动态添加新行的两种方法:
方法一: int index=this.dataGridView1.Rows.Add(); this.dataGridView1.Rows[index].Cells[0].Value = "1"; this.dataGridView1.Rows[index].Cells[1].Value = "2"; this.dataGridView1.Rows[index].Cells[2].Value = "监听";
利用dataGridView1.Rows.Add()事件为DataGridView控件增加新的行,该函数返回添加新行的索引号,即新行的行号,然后可以通过该索引号操作该行的各个单元格,如dataGridView1.Rows[index].Cells[0].Value = "1"。这是很常用也是很简单的方法。
方法二: DataGridViewRow row = new DataGridViewRow(); DataGridViewTextBoxCell textboxcell = new DataGridViewTextBoxCell(); textboxcell.Value = "aaa"; row.Cells.Add(textboxcell); DataGridViewComboBoxCell comboxcell = new DataGridViewComboBoxCell(); row.Cells.Add(comboxcell); dataGridView1.Rows.Add(row);
方法二比方法一要复杂一些,但是在一些特殊场合非常实用,例如,要在新行中的某些单元格添加下拉框、按钮之类的控件时,该方法很有帮助。 DataGridViewRow row = new DataGridViewRow();是创建DataGridView的行对象,DataGridViewTextBoxCell是单元格的内容是个TextBox,DataGridViewComboBoxCell是单元格的内容是下拉列表框,同理可知,DataGridViewButtonCell是单元格的内容是个按钮,等等。textboxcell是新创建的单元格的对象,可以为该对象添加其属性。然后通过row.Cells.Add(textboxcell)为row对象添加textboxcell单元格。要添加其他的单元格,用同样的方法即可。 最后通过dataGridView1.Rows.Add(row)为dataGridView1控件添加新的行row。 |
public class DVOP
{
///
/// DataGridView中查找指定列中的指定值,并选中该单元格
///
/// DataGridView控件
/// 找查的指定列
/// 查找的指定值
///
public bool Select(DataGridView dv, string colname, string str)
{
bool selected = false;
int row = dv.Rows.Count;//得到总行数
for (int i = 0; i < row; i++)//得到总行数并在之内循环
{
if (str == dv.Rows[i].Cells[colname].Value.ToString())
{ //对比TexBox中的值是否与dataGridView中的值相同(上面这句)
dv.CurrentCell = dv[colname, i];//定位到相同的单元格
selected = true;
return selected;//返回
}
}
return selected;
}
///
/// 向DataGirdView中添加行,显示在第一行,并选中该行
///
/// DataGridView对向
/// 总列数
/// 要添加的每列的值
public void AddRow(DataGridView dv, int colcount,params string[] colvalues)
{
DataGridViewRow dr = new DataGridViewRow();
dr.CreateCells(dv);
for (int i = 0; i < colcount; i++)
{
dr.Cells[i].Value = colvalues[i];
}
dv.Rows.Insert(0, dr);
dv.CurrentCell = dv.Rows[0].Cells[0];
}
///
/// 删除DV中的指定行
///
/// DataGridView对向
/// 要删除的指定行
public void ReMoveRow(DataGridView dv, int colindex)
{
dv.Rows.Remove(dv.Rows[colindex]);
dv.ClearSelection();
}
}
0(最基本的技巧)、获取某列中的某行(某单元格)中的内容
this.currentposition = this.dataGridView1.BindingContext [this.dataGridView1.DataSource, this.dataGridView1.DataMember].Position;bookContent = this.database.dataSet.Tables[0].Rows [this.currentposition][21].ToString().Trim();MessageBox.Show(bookContent);
1、自定义列
//定义列宽this.dataGridView1.Columns[0].Width = 80;this.dataGridView1.Columns[1].Width = 80;this.dataGridView1.Columns[2].Width = 180;this.dataGridView1.Columns[3].Width = 120;this.dataGridView1.Columns[4].Width = 120;Customize Cells and Columns in the Windows Forms DataGridView Control by Extending TheirBehavior and AppearanceHost Controls in Windows Forms DataGridView Cells
继承 DataGridViewTextBoxCell 类生成新的Cell类,然后再继承 DataGridViewColumn 生成新的Column类,并指定
CellTemplate为新的Cell类。新生成的Column便可以增加到DataGridView中去。
2、自动适应列宽
Programmatically Resize Cells to Fit Content in the Windows Forms DataGridView ControlSamples:DataGridView.AutoSizeColumns(DataGridViewAutoSizeColumnCriteria.HeaderAndDisplayedRows);DataGridView.AutoSizeColumn(DataGridViewAutoSizeColumnCriteria.HeaderOnly,2, false);DataGridView.AutoSizeRow(DataGridViewAutoSizeRowCriteria.Columns,2, false);DataGridView.AutoSizeRows(DataGridViewAutoSizeRowCriteria.HeaderAndColumns,0, dataGridView1.Rows.Count, false);
3、可以绑定并显示对象
Bind Objects to Windows Forms DataGridView Controls
4、可以改变表格线条风格
Change the Border and Gridline Styles in the Windows Forms DataGridView ControlSamples:this.dataGridView1.GridColor = Color.BlueViolet;this.dataGridView1.BorderStyle = BorderStyle.Fixed3D;this.dataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.None;this.dataGridView1.RowHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;this.dataGridView1.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;
5、动态改变列是否显示,和动态改变列的显示顺序
Change the Order of the Columns in the Windows Forms DataGridView ControlSamples:customersDataGridView.Columns["CustomerID"].Visible = false;customersDataGridView.Columns["ContactName"].DisplayIndex = 0;customersDataGridView.Columns["ContactTitle"].DisplayIndex = 1;customersDataGridView.Columns["City"].DisplayIndex = 2;customersDataGridView.Columns["Country"].DisplayIndex = 3;customersDataGridView.Columns["CompanyName"].DisplayIndex = 4;
6、可以在列中显示图像
Display Images in Cells of the Windows Forms DataGridView ControlSamples:Icon treeIcon = new Icon(this.GetType(), "tree.ico");DataGridViewImageColumn iconColumn = new DataGridViewImageColumn ();iconColumn.Image = treeIcon.ToBitmap();iconColumn.Name = "Tree";iconColumn.HeaderText = "Nice tree";dataGridView1.Columns.Insert(2, iconColumn);
7、格式化显示内容:
Format Data in the Windows Forms DataGridView ControlSamples:this.dataGridView1.Columns["UnitPrice"].DefaultCellStyle.Format = "c";this.dataGridView1.Columns["ShipDate"].DefaultCellStyle.Format = "d";this.dataGridView1.DefaultCellStyle.NullValue = "no entry";this.dataGridView1.DefaultCellStyle.WrapMode = DataGridViewWrapMode.Wrap;this.dataGridView1.Columns["CustomerName"].DefaultCellStyle.Alignment =DataGridViewContentAlignment.MiddleRight;
8、在拖动列的滚动条时可以将指定的列冻结
Freeze Columns in the Windows Forms DataGridView ControlSamples:将指定列及以前的列固定不动this.dataGridView1.Columns["AddToCartButton"].Frozen = true;
9、获取选择的单元格,行,列
Get the Selected Cells, Rows, and Columns in the Windows Forms DataGridView ControlSamples:
10、显示录入时出现的错误信息
Handle Errors that Occur During Data Entry in the Windows Forms DataGridView ControlSamples:private void dataGridView1_DataError(object sender,DataGridViewDataErrorEventArgs e){// If the data source raises an exception when a cell value is// commited, display an error message.if (e.Exception != null &&e.Context == DataGridViewDataErrorContext.Commit){MessageBox.Show("CustomerID value must be unique.");}}
11、大数据量显示采用Virtual Mode
Implement Virtual Mode in the Windows Forms DataGridView Control
12、设置指定的列只读
Make Columns in the Windows Forms DataGridView Control Read-OnlySamples:dataGridView1.Columns["CompanyName"].ReadOnly = true;
13、移去自动生成的列
Remove Autogenerated Columns from a Windows Forms DataGridView ControlSample:dataGridView1.AutoGenerateColumns = true;dataGridView1.DataSource = customerDataSet;dataGridView1.Columns.Remove ("Fax");或:dataGridView1.Columns["CustomerID"].Visible = false;
14、自定义选择模式
Set the Selection Mode of the Windows Forms DataGridView ControlSample:this.dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;this.dataGridView1.MultiSelect = false;
15、自定义设定光标进入单元格是否编辑模式(编辑模式)
Specify the Edit Mode for the Windows Forms DataGridView Controlthis.dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;
16、新行指定默认值
Specify Default Values for New Rows in the Windows Forms DataGridView ControlSample:private void dataGridView1_DefaultValuesNeeded(object sender, System.Windows.Forms.DataGridViewRowEventArgs e){e.Row.Cells["Region"].Value = "WA";e.Row.Cells["City"].Value = "Redmond";e.Row.Cells["PostalCode"].Value = "98052-6399";e.Row.Cells["Region"].Value = "NA";e.Row.Cells["Country"].Value = "USA";e.Row.Cells["CustomerID"].Value = NewCustomerId();}
17、数据验证
Validate Data in the Windows Forms DataGridView ControlSamples:private void dataGridView1_CellValidating(object sender,DataGridViewCellValidatingEventArgs e){// Validate the CompanyName entry by disallowing empty strings.if (dataGridView1.Columns[e.ColumnIndex].Name == "CompanyName"){if (e.FormattedValue.ToString() == String.Empty){dataGridView1.Rows[e.RowIndex].ErrorText ="Company Name must not be empty";e.Cancel = true;}}}
18、数据提交到dataset中
DataSet ds = new DataSet("MyDataSet");ds.Tables[biaom.Trim()].Rows.Clear();try{for (int i = 0; i < dataGridView1.Rows.Count - 1; i++){DataTable dt = ds.Tables[biaom.Trim()];DataRow myrow = ds.Tables[biaom.Trim()].NewRow();for (int j = 0; j < dataGridView1.Columns.Count; j++){myrow[j] = Convert.ToString(dataGridView1.Rows[i].Cells[j].Value);}ds.Tables[biaom.Trim()].Rows.Add(myrow);}}catch (Exception){MessageBox.Show("输入类型错误!");return;}
以上介绍C# DatagridView常用操作,希望对你有所帮助。