Question

我试图通过ObjectDataSource更新带有大量记录的GridView。我只更新已更改的记录，因此我使用ViewState检查原始数据表是否已更改。它在我的localhost / IIS上工作正常，但是当我在部署服务器上尝试相同的解决方案时，它给了我一个错误：

索引超出了数组的范围。

在这行代码中：

Dim row As System.Data.DataRow = originalDataTable.Select(String.Format("ID = '{0}'", currentID))(0)

以下是我的代码示例。服务器上的ViewState有问题吗？

Private ProdNum As String
Private tableCopied As Boolean = False
Private originalDataTable As System.Data.DataTable

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
    If e.Row.RowType = DataControlRowType.DataRow Then
        If Not tableCopied Then
            originalDataTable = CType(e.Row.DataItem, System.Data.DataRowView).Row.Table.Copy()
            ViewState("originalValuesDataTable") = originalDataTable
            tableCopied = True
        End If
    End If
End Sub


Protected Sub btnUpdate_Click(sender As Object, e As EventArgs) Handles btnUpdate.Click, btnUpdate1.Click
    originalDataTable = CType(ViewState("originalValuesDataTable"), System.Data.DataTable)

    For Each r As GridViewRow In GridView1.Rows
        If IsRowModified(r) Then GridView1.UpdateRow(r.RowIndex, False)
    Next

    ' Rebind the Grid to repopulate the original values table.
    tableCopied = False
    GridView1.DataBind()
End Sub

Protected Function IsRowModified(ByVal r As GridViewRow) As Boolean
    Dim currentID As Guid
    Dim currentNyhed as Boolean


    currentID = Guid.Parse(GridView1.DataKeys(r.RowIndex).Value.ToString())
    currentNyhed = CType(r.FindControl("CheckBoxNews"), CheckBox).Checked


    Dim row As System.Data.DataRow = originalDataTable.Select(String.Format("ID = '{0}'", currentID))(0)

    If Not currentNyhed.Equals(row("News").ToString()) Then Return True

    Return False
End Function

GridView绑定到具有以下基本设置的ObjectDataSource：

 <asp:ObjectDataSource ID="ObjectDataSource1" ViewStateMode="Enabled" EnableViewState="true" runat="server" InsertMethod="Insert" OldValuesParameterFormatString="original_{0}" SelectMethod="GetDataByOverruled" TypeName="DSoverskrivslisteTableAdapters.Shop_Products_Egenskaber_OverrulingTableAdapter" UpdateMethod="Update">

整个过程基于以下教程。而不是SqlDataSource我使用的是ObjectDataSource - 如上所述 - 在我的localhost上运行时工作正常，但在上传到部署服务器时给我错误。

http://msdn.microsoft.com/en-us/library/aa992036(v=vs.90).aspx

请帮忙。

更新af GridView - 可能是一个viewstate问题

0 个答案: