DataGridViewでコンテキストメニューを表示する方法

DataGridViewでコンテキストメニューを表示する方法
VB.NET

dgv1.ContextMenuStrip = Me.ContextMenuStrip1

dgv1.Columns(0).ContextMenuStrip = Me.ContextMenuStrip2
dgv1.Columns(0).HeaderCell.ContextMenuStrip = Me.ContextMenuStrip2

dgv1.Rows(0).ContextMenuStrip = Me.ContextMenuStrip3

dgv1(0, 1).ContextMenuStrip = Me.ContextMenuStrip4

C#

dgv1.ContextMenuStrip = this.ContextMenuStrip1;

dgv1.Columns[0].ContextMenuStrip = this.ContextMenuStrip2;
dgv1.Columns[0].HeaderCell.ContextMenuStrip = this.ContextMenuStrip2;

dgv1.Rows[0].ContextMenuStrip = this.ContextMenuStrip3;

dgv1[0, 1].ContextMenuStrip = this.ContextMenuStrip4;

CellContextMenuStripNeeded、RowContextMenuStripNeededイベントでヒントを表示する方法
VB.NET

Private Sub dgv1_CellContextMenuStripNeeded( _
        ByVal sender As Object, _
        ByVal e As DataGridViewCellContextMenuStripNeededEventArgs) _
        Handles dgv1.CellContextMenuStripNeeded
    Dim dgv As DataGridView = CType(sender, DataGridView)
    If e.RowIndex < 0 Then
        e.ContextMenuStrip = Me.ContextMenuStrip1
    ElseIf e.ColumnIndex < 0 Then
        e.ContextMenuStrip = Me.ContextMenuStrip2
    ElseIf TypeOf (dgv(e.ColumnIndex, e.RowIndex).Value) Is Integer Then
        e.ContextMenuStrip = Me.ContextMenuStrip3
    End If
End Sub

C#

private void dgv1_CellContextMenuStripNeeded(object sender,
    DataGridViewCellContextMenuStripNeededEventArgs e)
{
    DataGridView dgv = (DataGridView)sender;
    if (e.RowIndex < 0)
    {
        e.ContextMenuStrip = this.ContextMenuStrip1;
    }
    else if (e.ColumnIndex < 0)
    {
        e.ContextMenuStrip = this.ContextMenuStrip2;
    }
    else if (dgv[e.ColumnIndex, e.RowIndex].Value is int)
    {
        e.ContextMenuStrip = this.ContextMenuStrip3;
    }
}

VB.NET

Private Sub dgv1_RowContextMenuStripNeeded( _
        ByVal sender As Object, _
        ByVal e As DataGridViewRowContextMenuStripNeededEventArgs) _
        Handles dgv1.RowContextMenuStripNeeded
    Dim dgv As DataGridView = CType(sender, DataGridView)
    Dim boolVal As Object = dgv("col1", e.RowIndex).Value
    Console.WriteLine(boolVal)
    If TypeOf boolVal Is Boolean AndAlso CBool(boolVal) Then
        e.ContextMenuStrip = Me.ContextMenuStrip1
    End If
End Sub

C#

private void dgv1_RowContextMenuStripNeeded(object sender,
    DataGridViewRowContextMenuStripNeededEventArgs e)
{
    DataGridView dgv = (DataGridView)sender;
    object boolVal = dgv["col1", e.RowIndex].Value;
    Console.WriteLine(boolVal);
    if (boolVal is bool && (bool)boolVal)
    {
        e.ContextMenuStrip = this.ContextMenuStrip1;
    }
}