datagridview单元格,rowheader和columnheader的上下文菜单

Question

我想为datagridview单元格,rowheaders和columnheaders设置不同的上下文菜单.我的想法是,当我右键单击这些项目中的任何一项时,将显示不同的上下文菜单.我该怎么做呢？

Answer 1

使用DataGridView的MouseDown事件来测试是否单击了鼠标右键,如果是,请使用关联的HitTestInfo属性来确定是否单击了单元格,行或列.使用此信息显示所需的ContextMenuStrip.

这是一个MouseDown执行此操作的示例事件.要尝试该示例,请在表单上删除DataGridView和三个ContentMenuStrips.将ContentMenuStrips命名为mnuCell,mnuRow和mnuColumn.

Private Sub DataGridView1_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles DataGridView1.MouseDown
    If e.Button = Windows.Forms.MouseButtons.Right Then
        Dim ht As DataGridView.HitTestInfo
        ht = Me.DataGridView1.HitTest(e.X, e.Y)
        If ht.Type = DataGridViewHitTestType.Cell Then
            DataGridView1.ContextMenuStrip = mnuCell
            mnuCell.Items(0).Text = String.Format("This is the cell at {0}, {1}", ht.ColumnIndex, ht.RowIndex)
        ElseIf ht.Type = DataGridViewHitTestType.RowHeader Then
            DataGridView1.ContextMenuStrip = mnuRow
            mnuRow.Items(0).Text = "This is row " + ht.RowIndex.ToString()
        ElseIf ht.Type = DataGridViewHitTestType.ColumnHeader Then
            DataGridView1.ContextMenuStrip = mnuColumn 
            mnuColumn.Items(0).Text = "This is col " + ht.ColumnIndex.ToString()
        End If
    End If
End Sub

在这里,我将DataGridView的ContextMenuStrip属性分配给适用于右键单击项(单元格,行或列)的ContextMenuStrip.为了演示如何进一步自定义ContextMenuStrips的行为,我还在每个ContentMenuStrips的菜单项中设置文本.