DataGrid.BeginEdit(DataGridColumnStyle, Int32) 方法

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

尝试将网格置于允许编辑的状态。

public:
 virtual bool BeginEdit(System::Windows::Forms::DataGridColumnStyle ^ gridColumn, int rowNumber);

public bool BeginEdit (System.Windows.Forms.DataGridColumnStyle gridColumn, int rowNumber);

abstract member BeginEdit : System.Windows.Forms.DataGridColumnStyle * int -> bool
override this.BeginEdit : System.Windows.Forms.DataGridColumnStyle * int -> bool

Public Function BeginEdit (gridColumn As DataGridColumnStyle, rowNumber As Integer) As Boolean

参数

gridColumn

DataGridColumnStyle

要编辑的 DataGridColumnStyle。

rowNumber

Int32

要编辑行的行号。

返回

Boolean

如果此方法成功，则为 true；否则为 false。

实现

BeginEdit(DataGridColumnStyle, Int32)

示例

下面的代码示例使用 BeginEdit 该方法测试是否可以在更改指定的列和行之前进行编辑。

private:
   void EditGrid( DataGrid^ dataGrid1 )
   {
      // Get the selected row and column through the CurrentCell.
      int colNum;
      int rowNum;
      colNum = dataGrid1->CurrentCell.ColumnNumber;
      rowNum = dataGrid1->CurrentCell.RowNumber;
      // Get the selected DataGridColumnStyle.
      DataGridColumnStyle^ dgCol;
      dgCol = dataGrid1->TableStyles[ 0 ]->GridColumnStyles[ colNum ];
      // Invoke the BeginEdit method to see if editing can begin.
      if ( dataGrid1->BeginEdit( dgCol, rowNum ) )
      {
         // Edit row value. Get the DataTable and selected row.
         DataTable^ myTable;
         DataRow^ myRow;
         // Assuming the DataGrid is bound to a DataTable.
         myTable = (DataTable^)(dataGrid1->DataSource);
         myRow = myTable->Rows[ rowNum ];
         // Invoke the Row object's BeginEdit method.
         myRow->BeginEdit();
         myRow[ colNum ] = "New Value";
         // You must accept changes on both DataRow and DataTable.
         myRow->AcceptChanges();
         myTable->AcceptChanges();
         dataGrid1->EndEdit( dgCol, rowNum, false );
      }
      else
      {
         Console::WriteLine( "BeginEdit failed" );
      }
   }

private void EditGrid(DataGrid dataGrid1){
    // Get the selected row and column through the CurrentCell.
    int colNum;
    int rowNum;
    colNum = dataGrid1.CurrentCell.ColumnNumber;
    rowNum = dataGrid1.CurrentCell.RowNumber;
    // Get the selected DataGridColumnStyle.
    DataGridColumnStyle dgCol;
    dgCol = dataGrid1.TableStyles[0].GridColumnStyles[colNum];
    // Invoke the BeginEdit method to see if editing can begin.
    if (dataGrid1.BeginEdit(dgCol, rowNum)){
       // Edit row value. Get the DataTable and selected row.
       DataTable myTable;
       DataRow myRow;
       // Assuming the DataGrid is bound to a DataTable.
       myTable = (DataTable) dataGrid1.DataSource;
       myRow = myTable.Rows[rowNum];
       // Invoke the Row object's BeginEdit method.
       myRow.BeginEdit();
       myRow[colNum] = "New Value";
       // You must accept changes on both DataRow and DataTable.
       myRow.AcceptChanges();
       myTable.AcceptChanges();
       dataGrid1.EndEdit(dgCol, rowNum, false);
    }
    else{
      Console.WriteLine("BeginEdit failed");
    }
 }

Private Sub EditGrid(dataGrid1 As DataGrid)
    ' Get the selected row and column through the CurrentCell.
    Dim colNum As Integer
    Dim rowNum As Integer
    colNum = dataGrid1.CurrentCell.ColumnNumber
    rowNum = dataGrid1.CurrentCell.RowNumber
    ' Get the selected DataGridColumnStyle.
    Dim dgCol As DataGridColumnStyle
    dgCol = dataGrid1.TableStyles(0).GridColumnStyles(colNum)
    ' Invoke the BeginEdit method to see if editing can begin.
    If dataGrid1.BeginEdit(dgCol, rowNum) Then
        ' Edit row value. Get the DataTable and selected row.
        Dim myTable As DataTable
        Dim myRow As DataRow
        ' Assuming the DataGrid is bound to a DataTable.
        myTable = CType(dataGrid1.DataSource, DataTable)
        myRow = myTable.Rows(rowNum)
        ' Invoke the Row object's BeginEdit method.
        myRow.BeginEdit()
        myRow(colNum) = "New Value"
        ' You must accept changes on both DataRow and DataTable.
        myRow.AcceptChanges()
        myTable.AcceptChanges()
        dataGrid1.EndEdit(dgCol, rowNum, False)
    Else
        Console.WriteLine("BeginEdit failed")
    End If
End Sub

注解

如果用户已开始键入单元格，网格将拒绝编辑请求。 在这种情况下，该方法 BeginEdit 将返回 false。

另请参阅

• EndEdit(DataGridColumnStyle, Int32, Boolean)