DataGridView.BeginEdit Method (Boolean)

 
System_CAPS_noteNote

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Puts the current cell in edit mode.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

Public Overridable Function BeginEdit (
	selectAll As Boolean
) As Boolean

Parameters

selectAll
Type: System.Boolean

true to select all the cell's contents; false to not select any contents.

Return Value

Type: System.Boolean

true if the current cell is already in edit mode or successfully enters edit mode; otherwise, false.

Exception Condition
InvalidOperationException

CurrentCell is not set to a valid cell.

-or-

This method was called in a handler for the CellBeginEdit event.

InvalidCastException

The type indicated by the cell's EditType property does not derive from the Control type.

-or-

The type indicated by the cell's EditType property does not implement the IDataGridViewEditingControl interface.

Exception

Initialization of the editing cell value failed and either there is no handler for the DataError event or the handler has set the DataGridViewDataErrorEventArgs.ThrowException property to true. The exception object can typically be cast to type FormatException.

This method returns false if the cell fails to enter edit mode, which can happen for a number of reasons. This method returns false if the current cell is read-only. It also returns false if the cell EditType property is null (meaning the cell cannot host an editing control) and the cell type does not implement the IDataGridViewEditingCell interface.

If the cell supports editing, this method raises the CellBeginEdit event, which can be canceled, and returns false if an event handler cancels the edit. If the edit is not canceled and the cell can host an editing control, this method initializes the control and displays it. If the initialization fails, this method returns false.

If the cell successfully enters edit mode, the IsCurrentCellInEditMode property returns true.

The following code example demonstrates the use of this method.

' Override OnMouseClick in a class derived from DataGridViewCell to 
' enter edit mode when the user clicks the cell. 
Protected Overrides Sub OnMouseClick( _
    ByVal e As DataGridViewCellMouseEventArgs)

    If MyBase.DataGridView IsNot Nothing Then

        Dim point1 As Point = MyBase.DataGridView.CurrentCellAddress
        If point1.X = e.ColumnIndex And _
            point1.Y = e.RowIndex And _
            e.Button = MouseButtons.Left And _
            Not MyBase.DataGridView.EditMode = _
            DataGridViewEditMode.EditProgrammatically Then

            MyBase.DataGridView.BeginEdit(True)

        End If
    End If
End Sub

.NET Framework
Available since 2.0
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