DataGridView.ProcessDataGridViewKey(KeyEventArgs) Method
Definition
Important
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Processes keys used for navigating in the DataGridView.
protected:
virtual bool ProcessDataGridViewKey(System::Windows::Forms::KeyEventArgs ^ e);protected virtual bool ProcessDataGridViewKey (System.Windows.Forms.KeyEventArgs e);abstract member ProcessDataGridViewKey : System.Windows.Forms.KeyEventArgs -> bool
override this.ProcessDataGridViewKey : System.Windows.Forms.KeyEventArgs -> boolProtected Overridable Function ProcessDataGridViewKey (e As KeyEventArgs) As BooleanParameters
Contains information about the key that was pressed.
Returns
true if the key was processed; otherwise, false.
Exceptions
The key pressed would cause the control to enter edit mode, but the EditType property of the current cell does not indicate a class that derives from Control and implements IDataGridViewEditingControl.
This action would commit a cell value or enter edit mode, but an error in the data source prevents the action and either there is no handler for the DataError event or the handler has set the ThrowException property to true.
-or-
The DELETE key would delete one or more rows, but an error in the data source prevents the deletion and either there is no handler for the DataError event or the handler has set the ThrowException property to true.
Examples
The following code example demonstrates how to change the behavior of the ENTER key in a DataGridView subclass by overriding the ProcessDataGridViewKey and ProcessDialogKey methods. In the example, the ENTER key has the same behavior as the RIGHT ARROW key, making it easier for a user to edit multiple cells in a single row of data.
public class CustomDataGridView : DataGridView
{
protected override bool ProcessDialogKey(Keys keyData)
{
// Extract the key code from the key value.
Keys key = (keyData & Keys.KeyCode);
// Handle the ENTER key as if it were a RIGHT ARROW key.
if (key == Keys.Enter)
{
return this.ProcessRightKey(keyData);
}
return base.ProcessDialogKey(keyData);
}
protected override bool ProcessDataGridViewKey(KeyEventArgs e)
{
// Handle the ENTER key as if it were a RIGHT ARROW key.
if (e.KeyCode == Keys.Enter)
{
return this.ProcessRightKey(e.KeyData);
}
return base.ProcessDataGridViewKey(e);
}
}
Public Class CustomDataGridView
Inherits DataGridView
<System.Security.Permissions.UIPermission( _
System.Security.Permissions.SecurityAction.LinkDemand, _
Window:=System.Security.Permissions.UIPermissionWindow.AllWindows)> _
Protected Overrides Function ProcessDialogKey( _
ByVal keyData As Keys) As Boolean
' Extract the key code from the key value.
Dim key As Keys = keyData And Keys.KeyCode
' Handle the ENTER key as if it were a RIGHT ARROW key.
If key = Keys.Enter Then
Return Me.ProcessRightKey(keyData)
End If
Return MyBase.ProcessDialogKey(keyData)
End Function
<System.Security.Permissions.SecurityPermission( _
System.Security.Permissions.SecurityAction.LinkDemand, Flags:= _
System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)> _
Protected Overrides Function ProcessDataGridViewKey( _
ByVal e As System.Windows.Forms.KeyEventArgs) As Boolean
' Handle the ENTER key as if it were a RIGHT ARROW key.
If e.KeyCode = Keys.Enter Then
Return Me.ProcessRightKey(e.KeyData)
End If
Return MyBase.ProcessDataGridViewKey(e)
End Function
End Class
Remarks
This method calls the key-processing method appropriate to the key pressed (for example, the ProcessF2Key method when F2 is pressed) and returns the return value of that method.
Notes to Inheritors
When overriding this method, a control should return true to indicate that it has processed the key. For keys that are not processed by the control, return the result of the base version of this method.
