为什么我得到这个异常：Sys.WebForms.PageRequestManagerServerErrorException: Invalid postback or callback argument

Question

为什么会出现这个错误

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.

当 Save 命令的事件启动时出现此错误

  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

Answer 1

在 .aspx 页面的顶部，将 EnableEventValidation 设置为 false。