markdown 列上的DevExpress工具提示

Posted 2021-05-05

First add the ToolTipController component onto the form.

Set the ToolTipController property of the GridControl to point to the ToolTipController component.

Create an event handler for the ToolTipController's GetActiveObjectInfo event

    Private Sub toolTipController1_GetActiveObjectInfo(ByVal sender As Object, ByVal e As ToolTipControllerGetActiveObjectInfoEventArgs) Handles toolTipController1.GetActiveObjectInfo
      If e.Info Is Nothing AndAlso e.SelectedControl Is gridControl1 Then
        Dim view As GridView = TryCast(gridControl1.FocusedView, GridView)
        Dim info As GridHitInfo = view.CalcHitInfo(e.ControlMousePosition)
        If info.InRowCell Then
          Dim text As String = view.GetRowCellDisplayText(info.RowHandle, info.Column)
          Dim cellKey As String = info.RowHandle.ToString() & " - " & info.Column.ToString()
          e.Info = New DevExpress.Utils.ToolTipControlInfo(cellKey, text)
        End If
      End If
    End Sub

This example will display the contents of each column when the mouse hoovers over the cell. To set the ToolTip for a specific column, check for the column name. For example

    If info.InRowCell Then
      If info.Column.Name = "colOrderNumber" then
        cellKey = info.RowHandle.ToString() & " - " & info.Column.ToString()
        e.Info = New DevExpress.Utils.ToolTipControlInfo(cellKey, "This is the Order Number column")
      End If
    End If