月度归档： 2016 年 5 月

addhanderl与handels区别

遇到一个问题。addhandler 与 handels的区别是什么

举例：如下语句运行成功

 Private Sub 供货商IDSearchLookUpEdit_TextChanged(sender As Object, e As EventArgs) Handles 供货商IDSearchLookUpEdit.TextChanged
        MsgBox(sender.name, MsgBoxStyle.OkCancel, "测试")
End Sub

如下语句不成功

Private Sub 主界面_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    AddHandler 供货商IDSearchLookUpEdit.TextChanged, AddressOf 供货商IDSearchLookUpEdit_TextChanged
end sub

Private Sub 供货商IDSearchLookUpEdit_TextChanged(sender As Object, e As EventArgs)
        'Handles 供货商IDSearchLookUpEdit.TextChanged
        MsgBox(sender.name, MsgBoxStyle.OkCancel, "测试")
End Sub

 

如何修改 cell 值

Private Sub GridView1_CellValueChanged(sender As Object, e As DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs) Handles GridView1.CellValueChanged
        If e.Column.FieldName = "FieldName" Then
            GridView1.SetRowCellValue(e.RowHandle, "columnName", "value")
        End If
End Sub

注：千万必要写成以下形式，否则会引发System.StackOverflowException 异常

Private Sub GridView1_CellValueChanged(sender As Object, e As DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs) Handles GridView1.CellValueChanged
        If GridView1.FocusedColumn.FieldName = "FieldName" Then
            GridView1.SetRowCellValue(e.RowHandle, "columnName", "value")
        End If
End Sub

相关链接：https://www.devexpress.com/Support/Center/Question/Details/T352822

如何让TreeListLookup在弹出时，自动对焦到搜索框

QQ截图20160516152712

如图所示，在弹出时，自动对焦到红框区域。

 Private Sub 商品查找品牌RepositoryItemTreeListLookUpEdit_Popup(sender As Object, e As EventArgs) Handles 商品查找品牌RepositoryItemTreeListLookUpEdit.Popup
        Dim editor As TreeListLookUpEdit = CType(sender, TreeListLookUpEdit)
        editor.Properties.TreeList.ShowFindPanel()
End Sub

 Private Sub 商品查找商品RepositoryItemSearchLookUpEdit_Popup(sender As Object, e As EventArgs) Handles 商品查找商品RepositoryItemSearchLookUpEdit.Popup
        Dim editor As SearchLookUpEdit = CType(sender, SearchLookUpEdit)
        editor.Properties.View.ShowFindPanel()
End Sub