Question

我可以知道如何声明viewstate .. 我需要的是sql存在一些数据所以，我想创建数据表列并填充数据。我想将它保存在视图状态但是viewstate我无法声明显示一些错误看看下面的iamge .. 任何解决方案正好在viewsate显示消息，如果我把鼠标放在viewate上它告诉声明是预期的..

 Dim dt As New DataTable()
        Dim dr As DataRow = Nothing
        dt.Columns.Add(New DataColumn("SNO", GetType(String)))
        dt.Columns.Add(New DataColumn("Standard Description", GetType(String)))
        dt.Columns.Add(New DataColumn("ItemCode", GetType(String)))
        dt.Columns.Add(New DataColumn("Regional Name", GetType(String)))
        dt.Columns.Add(New DataColumn("UOM", GetType(String)))


        For i As Integer = 1 To RS1.RecordCount
            dr = dt.NewRow()

            dr("SNO") = i
            dr("Standard Description") = RS1.Fields.Item("U_ItmDes").Value
            dr("ItemCode") = RS1.Fields.Item("U_ItmCde").Value
            dr("Regional Name") = RS1.Fields.Item("U_ItmNme").Value
            dr("UOM") = RS1.Fields.Item("U_UOM").Value
            dt.Rows.Add(dr)
            RS1.MoveNext()
        Next
        ViewState("CurrentTable") = dt

Answer 1

   For i As Integer = 1 To RS1.RecordCount
        dr = dt.NewRow()
        dr("SNO") = i
        dr("Standard Description") = RS1.Fields.Item("U_ItmDes").Value
        dr("ItemCode") = RS1.Fields.Item("U_ItmCde").Value
        dr("Regional Name") = RS1.Fields.Item("U_ItmNme").Value
        dr("UOM") = RS1.Fields.Item("U_UOM").Value
        dt.Rows.Add(dr)
        RS1.MoveNext()
    Next

委托此代码并尝试重新构建。如果仍然出现此错误。如果没有，则此代码中存在问题

如何在vb.net中声明viewstate

1 个答案: