Asp.net 获取此异常的原因：Sys.WebForms.PageRequestManagerServerErrorException:回发或回调参数无效

为什么我会犯这个错误

Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

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在.aspx页面顶部，将EnableEventValidation设置为false

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这只是隐藏了错误。设置这些属性无法解决此错误的影响。谢谢。。。使用aspx页面很痛苦

  Protected Sub DataList1_ItemCommand(source As Object, e As System.Web.UI.WebControls.DataListCommandEventArgs) Handles dlMainTraing.ItemCommand
        If e.CommandName = "Save" Then
            Dim lblMainId = CType(dlMainTraing.Items(e.Item.ItemIndex).FindControl("Train_M_IndxLabel"), Label)
            Dim txtSubTrainingName2 = CType(dlMainTraing.Items(e.Item.ItemIndex).FindControl("txtSubTrainingName"), TextBox)
            Dim a = addSubTraining(CInt(lblMainId.Text), txtSubTrainingName2.Text)
            ' Dim gvSubTraning As GridView = CType(e.Item.FindControl("gvSubTraning"), GridView)
            'gvSubTraning.DataBind()
        End If

    End Sub