DataGridTextBoxColumn.Edit 方法

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

準備儲存格以進行編輯作業。

protected public:
 override void Edit(System::Windows::Forms::CurrencyManager ^ source, int rowNum, System::Drawing::Rectangle bounds, bool readOnly, System::String ^ displayText, bool cellIsVisible);

protected internal override void Edit (System.Windows.Forms.CurrencyManager source, int rowNum, System.Drawing.Rectangle bounds, bool readOnly, string displayText, bool cellIsVisible);

override this.Edit : System.Windows.Forms.CurrencyManager * int * System.Drawing.Rectangle * bool * string * bool -> unit

Protected Friend Overrides Sub Edit (source As CurrencyManager, rowNum As Integer, bounds As Rectangle, readOnly As Boolean, displayText As String, cellIsVisible As Boolean)

參數

source

CurrencyManager

此資料行所屬之 CurrencyManager 控制項的 DataGrid。

rowNum

Int32

正在編輯中這個資料行的資料列編號。

bounds

Rectangle

控制項位置所在的周框 Rectangle。

readOnly

Boolean

數值，指出資料行是否唯讀。 如果該值為唯讀，則為 true，否則為 false。

displayText

String

控制項中要顯示的文字。

cellIsVisible

Boolean

數值，指出儲存格是否為可見。 如果儲存格為可見的，則為 true，否則為 false。

範例

下列範例會 Edit 使用 方法來變更 控制項中按一下儲存格的 DataGrid 文字。

public ref class MyGridColumn: public DataGridTextBoxColumn
{
public:
   void EditCol( CurrencyManager^ cm, int rowNum, Rectangle cellRect, bool readOnly, String^ myString, bool isVisible )
   {
      this->Edit( cm, rowNum, cellRect, readOnly, myString, isVisible );
   }

};

public ref class Form1: public Form
{
protected:
   DataGrid^ dataGrid1;
   DataSet^ myDataSet;
private:
   void dataGrid1_MouseDown( Object^ sender, MouseEventArgs^ e )
   {
      
      // Use the HitTest method to get a HitTestInfo object.
      DataGrid::HitTestInfo ^ hi;
      DataGrid^ grid = dynamic_cast<DataGrid^>(sender);
      hi = grid->HitTest( e->X, e->Y );
      
      // Test if the clicked area was a cell.
      if ( hi->Type == DataGrid::HitTestType::Cell )
      {
         
         // If it's a cell, get the GridTable and CurrencyManager of the
         // clicked table.         
         DataGridTableStyle^ dgt = dataGrid1->TableStyles[ 0 ];
         CurrencyManager^ cm = dynamic_cast<CurrencyManager^>(this->BindingContext[ myDataSet->Tables[ dgt->MappingName ] ]);
         
         // Get the Rectangle of the clicked cell.
         Rectangle cellRect = grid->GetCellBounds( hi->Row, hi->Column );
         
         // Get the clicked DataGridTextBoxColumn.
         MyGridColumn^ gridCol = dynamic_cast<MyGridColumn^>(dgt->GridColumnStyles[ hi->Column ]);
         
         // Edit the value.
         gridCol->EditCol( cm, hi->Row, cellRect, false, "New Text", true );
      }
   }

};

public class Form1: Form
{
protected DataGrid dataGrid1;
protected DataSet myDataSet;

private void dataGrid1_MouseDown(object sender, MouseEventArgs e)
{
    // Use the HitTest method to get a HitTestInfo object.
    DataGrid.HitTestInfo hi;   
    DataGrid grid = (DataGrid)sender;
    hi=grid.HitTest(e.X, e.Y);
    // Test if the clicked area was a cell.
    if (hi.Type == DataGrid.HitTestType.Cell)
    {
       // If it's a cell, get the GridTable and CurrencyManager of the
       // clicked table.         
       DataGridTableStyle dgt = dataGrid1.TableStyles[0];     
       CurrencyManager cm = (CurrencyManager)
        this.BindingContext[myDataSet.Tables[dgt.MappingName]];
       // Get the Rectangle of the clicked cell.
       Rectangle cellRect = grid.GetCellBounds(hi.Row, hi.Column);
       // Get the clicked DataGridTextBoxColumn.
       MyGridColumn gridCol =
       (MyGridColumn)dgt.GridColumnStyles[hi.Column];
       // Edit the value.
       gridCol.EditCol(cm, hi.Row, cellRect, false, "New Text", true);
    }
 }
}

public class MyGridColumn:DataGridTextBoxColumn{
   public void EditCol(CurrencyManager cm, int rowNum, 
      Rectangle cellRect, bool readOnly, 
      string myString, bool isVisible){
      this.Edit(cm, rowNum, cellRect, readOnly, myString, isVisible);
   }
}

Public Class Form1
   Inherits Form
   Protected dataGrid1 As DataGrid
   Protected myDataSet As DataSet
    
   
    Private Sub dataGrid1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
        ' Use the HitTest method to get a HitTestInfo object.
        Dim hi As DataGrid.HitTestInfo
        Dim grid As DataGrid = CType(sender, DataGrid)
        hi = grid.HitTest(e.X, e.Y)
        ' Test if the clicked area was a cell.
        If hi.Type = DataGrid.HitTestType.Cell Then
            ' If it's a cell, get the GridTable and CurrencyManager of the
            ' clicked table.         
            Dim dgt As DataGridTableStyle = dataGrid1.TableStyles(0)
            Dim cm As CurrencyManager = CType _
            (Me.BindingContext(myDataSet.Tables(dgt.MappingName)), _
            CurrencyManager)
            ' Get the Rectangle of the clicked cell.
            Dim cellRect As Rectangle = _
            grid.GetCellBounds(hi.Row, hi.Column)
            ' Get the clicked DataGridTextBoxColumn.
            Dim gridCol As MyGridColumn = CType _
            (dgt.GridColumnStyles(hi.Column), MyGridColumn)
            ' Edit the value.
            gridCol.EditCol(cm, hi.Row, cellRect, False, "New Text", True)
        End If
    End Sub
End Class 

Public Class MyGridColumn
Inherits DataGridTextBoxColumn
   Public Sub EditCol(cm As CurrencyManager , rowNum As integer , _
   cellRect As Rectangle , bReadOnly As Boolean , _
   myString As String , isVisible As Boolean )
      me.Edit(cm, rowNum, cellRect, bReadOnly, myString, isVisible)
   End Sub
End Class

備註

TextBox方 Edit 格上的控制項位於要編輯之儲存格的位置。 當編輯作業即將開始時，類別的 BeginEdit 方法會呼叫 DataGrid 方法。

另請參閱

• DataGrid
• DataGridColumnStyle
• CurrencyManager