DataGridViewRow.ContextMenuStrip 属性

定义

获取或设置行的快捷菜单。Gets or sets the shortcut menu for the row.

public:
 virtual property System::Windows::Forms::ContextMenuStrip ^ ContextMenuStrip { System::Windows::Forms::ContextMenuStrip ^ get(); void set(System::Windows::Forms::ContextMenuStrip ^ value); };
public override System.Windows.Forms.ContextMenuStrip ContextMenuStrip { get; set; }
member this.ContextMenuStrip : System.Windows.Forms.ContextMenuStrip with get, set
Public Overrides Property ContextMenuStrip As ContextMenuStrip

属性值

与当前 ContextMenuStrip 关联的 DataGridViewRowThe ContextMenuStrip associated with the current DataGridViewRow. 默认值为 nullThe default is null.

异常

在获取此属性的值时,行位于 DataGridView 控件中,并且是共享行。When getting the value of this property, the row is in a DataGridView control and is a shared row.

示例

下面的代码示例演示如何使用 DataGridViewColumn.ContextMenuStrip 属性,该属性与 DataGridViewRow 类的 ContextMenuStrip 属性几乎完全相同。The following code example demonstrates how to use the DataGridViewColumn.ContextMenuStrip property, which is nearly identical to the ContextMenuStrip property of the DataGridViewRow class. 此代码示例摘自 DataGridViewColumn 类中提供的一个更大的代码示例。This code example is part of a larger code example provided in the DataGridViewColumn class.

ToolStripMenuItem^ toolStripItem1;
void AddContextMenu()
{
   toolStripItem1->Text = L"Redden";
   toolStripItem1->Click += gcnew EventHandler( this, &DataGridViewColumnDemo::toolStripItem1_Click );
   System::Windows::Forms::ContextMenuStrip^ strip = gcnew System::Windows::Forms::ContextMenuStrip;
   IEnumerator^ myEnum = dataGridView->Columns->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      DataGridViewColumn^ column = safe_cast<DataGridViewColumn^>(myEnum->Current);
      column->ContextMenuStrip = strip;
      column->ContextMenuStrip->Items->Add( toolStripItem1 );
   }
}

DataGridViewCellEventArgs^ mouseLocation;

// Change the cell's color.
void toolStripItem1_Click( Object^ /*sender*/, EventArgs^ /*args*/ )
{
   dataGridView->Rows[ mouseLocation->RowIndex ]->Cells[ mouseLocation->ColumnIndex ]->Style->BackColor = Color::Red;
}


// Deal with hovering over a cell.
void dataGridView_CellMouseEnter( Object^ /*sender*/, DataGridViewCellEventArgs^ location )
{
   mouseLocation = location;
}


ToolStripMenuItem toolStripItem1 = new ToolStripMenuItem();

private void AddContextMenu()
{
    toolStripItem1.Text = "Redden";
    toolStripItem1.Click += new EventHandler(toolStripItem1_Click);
    ContextMenuStrip strip = new ContextMenuStrip();
    foreach (DataGridViewColumn column in dataGridView.Columns)
    {

        column.ContextMenuStrip = strip;
        column.ContextMenuStrip.Items.Add(toolStripItem1);
    }
}

private DataGridViewCellEventArgs mouseLocation;

// Change the cell's color.
private void toolStripItem1_Click(object sender, EventArgs args)
{
    dataGridView.Rows[mouseLocation.RowIndex]
        .Cells[mouseLocation.ColumnIndex].Style.BackColor
        = Color.Red;
}

// Deal with hovering over a cell.
private void dataGridView_CellMouseEnter(object sender,
    DataGridViewCellEventArgs location)
{
    mouseLocation = location;
}
WithEvents toolStripItem1 As New ToolStripMenuItem()

Private Sub AddContextMenu()
    toolStripItem1.Text = "Redden"
    Dim strip As New ContextMenuStrip()
    For Each column As DataGridViewColumn _
        In dataGridView.Columns()

        column.ContextMenuStrip = strip
        column.ContextMenuStrip.Items.Add(toolStripItem1)
    Next
End Sub
' Change the cell's color.
Private Sub toolStripItem1_Click(ByVal sender As Object, _
    ByVal args As EventArgs) _
    Handles toolStripItem1.Click

    dataGridView.Rows(mouseLocation.RowIndex) _
        .Cells(mouseLocation.ColumnIndex) _
        .Style.BackColor = Color.Red
End Sub

Private mouseLocation As DataGridViewCellEventArgs

' Deal with hovering over a cell.
Private Sub dataGridView_CellMouseEnter(ByVal sender As Object, _
    ByVal location As DataGridViewCellEventArgs) _
    Handles DataGridView.CellMouseEnter

    mouseLocation = location
End Sub

注解

此属性指示在用户右键单击行时所显示的快捷菜单,除非 DataGridView 控件 CellContextMenuStripNeeded 事件或行 ContextMenuStrip 属性将覆盖所单击的特定单元格的快捷菜单。This property indicates the shortcut menu that is displayed when the user right-clicks the row unless the DataGridView control CellContextMenuStripNeeded event or the row ContextMenuStrip property overrides the shortcut menu for the specific cell that was clicked.

当设置 DataGridView 控件 DataSource 属性或 trueVirtualMode 属性时,获取 ContextMenuStrip 属性的值将引发控件的 RowContextMenuStripNeeded 事件,并返回事件中指定的 DataGridViewRowContextMenuStripNeededEventArgs.ContextMenuStrip 属性的值。函数.When the DataGridView control DataSource property is set or its VirtualMode property is true, getting the value of the ContextMenuStrip property raises the RowContextMenuStripNeeded event of the control and returns the value of the DataGridViewRowContextMenuStripNeededEventArgs.ContextMenuStrip property as specified in the event handler. 如果没有针对事件的处理程序,则获取 ContextMenuStrip 属性的值将返回以前指定的值或其默认值 nullIf there are no handlers for the event, getting the value of the ContextMenuStrip property returns the previously specified value or its default value of null.

在为多个行设置行 ContextMenuStrip 值时,处理大量数据时,处理 RowContextMenuStripNeeded 事件主要用于避免性能损失。Handling the RowContextMenuStripNeeded event is primarily useful when working with large amounts of data to avoid performance penalties when setting the row ContextMenuStrip value for multiple rows. 有关详细信息,请参阅 缩放 Windows 窗体 DataGridView 控件的最佳做法For more information, see Best Practices for Scaling the Windows Forms DataGridView Control.

更改此属性将引发所属 DataGridView上的 RowContextMenuStripChanged 事件(如果存在)。Changing this property raises the RowContextMenuStripChanged event on the owning DataGridView, if one exists.

如果当前行是共享的,请使用 GetContextMenuStrip 方法,而不是获取此属性的值。If the current row is shared, use the GetContextMenuStrip method rather than getting the value of this property.

适用于

另请参阅