DataGridView.ProcessDialogKey(Keys) 方法

定义

处理用来控制对话框的键,例如 Tab、Esc、Enter 和箭头键。

protected:
 override bool ProcessDialogKey(System::Windows::Forms::Keys keyData);
protected override bool ProcessDialogKey (System.Windows.Forms.Keys keyData);
override this.ProcessDialogKey : System.Windows.Forms.Keys -> bool
Protected Overrides Function ProcessDialogKey (keyData As Keys) As Boolean

参数

keyData
Keys

Keys 值的按位组合,这些值表示要处理的一个或多个键。

返回

如果已处理该键,则为 true;否则为 false

例外

按下的键将导致该控件进入编辑模式,但当前单元格的 EditType 属性不指示派生自 Control 并实现 IDataGridViewEditingControl 的类。

此操作将提交一个单元格值或者进入编辑模式,但是数据源中的错误禁止执行此操作,DataError 事件没有处理程序,或者处理程序已将 ThrowException 属性设置为 true

示例

下面的代码示例演示如何通过重写 ProcessDataGridViewKeyProcessDialogKey 方法更改子类中 DataGridView ENTER 键的行为。 在本示例中,ENTER 键的行为与向右键相同,使用户能够更轻松地编辑单行数据中的多个单元格。

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

注解

此方法在编辑模式下调用,用于处理不由托管编辑控件处理的键盘输入。

如果按键确定不是输入键,则会将其发送到基类进行处理。

继承者说明

重写此方法时,控件应返回 true 以指示它已处理密钥。 对于控件未处理的键,返回此方法的基本版本的结果。

适用于

另请参阅