[VB.NET]指定的参数已超出有效值的范围 怎么解决 在线

指定的参数已超出有效值的范围 怎么解决 在线 “/qyml”应用程序中的服务器错误。 -------------------------------------------------------------------------- 指定的参数已超出有效值的范围。参数名: 房地产业 说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.ArgumentOutOfRangeException: 指定的参数已超出有效值的范围。参数名: 房地产业 源错误: 行 85： txt_MlbigClassName.SelectedValue = dtr( "MlbigClassName ").ToString 错误是着样的 代码 If Not IsPostBack Then Dim myconn As sqlConnection = New sqlConnection(ConfigurationSettings.AppSettings( "connectionString ")) Dim dtr As sqlDataReader Dim my_user = DecodeDES(Convert.ToString(Request.QueryString( "user ")),myKey,myIV) Dim cmd As sqlCommand = New sqlCommand( "select Companydd,Companydjg,MlbigClassName,Companylx,clr,cln,cly,Companyfr,Companyzc,Companyrs,Companyms,zichan,Companyfw,fuzai,Companygm,Companyyye,Companykz,Companymj,Companyyy,Companysw,Companykhyh,Companyyhzh,Companyzy,Companyjy from CompanyContent where user_id= '' " & my_user & " '' ",myconn) cmd.Parameters.Add( "@user_id ",Trim(my_user)) myconn.open() dtr = cmd.ExecuteReader() While dtr.Read() txt_Companydd.SelectedValue = dtr( "Companydd ").ToString txt_Companydjg.SelectedValue = dtr( "Companydjg ").ToString txt_Companylx.SelectedValue = dtr( "Companylx ").ToString ''txt_MlbigClassName.SelectedValue = dtr( "MlbigClassName ").ToString clr.SelectedValue = dtr( "clr ").ToString cly.SelectedValue = dtr( "cly ").ToString cln.Text = dtr( "cln ").ToString txt_Companyfr.Text = dtr( "Companyfr ").ToString txt_Companyzc.Text = dtr( "Companyzc ").ToString txt_Companyrs.Text = dtr( "Companyrs ").ToString txt_Companyms.Text = dtr( "Companyms ").ToString zichan.Text = dtr( "zichan ").ToString txt_Companyfw.Text = dtr( "Companyfw ").ToString fuzai.Text = dtr( "fuzai ").ToString txt_Companygm.Text = dtr( "Companygm ").ToString txt_Companyyye.Text = dtr( "Companyyye ").ToString txt_Companykz.Text = dtr( "Companykz ").ToString txt_Companymj.Text = dtr( "Companymj ").ToString txt_Companyyy.Text = dtr( "Companyyy ").ToString txt_Companysw.Text = dtr( "Companysw ").ToString txt_Companykhyh.Text = dtr( "Companykhyh ").ToString txt_Companyyhzh.Text = dtr( "Companyyhzh ").ToString txt_Companyzy.Text = dtr( "Companyzy ").ToString txt_Companyjy.Text = dtr( "Companyjy ").ToString End While dtr.Close() myconn.Close() End If 这个问题怎么解决? __________________________________________________________________________ 占上先 __________________________________________________________________________ txt_MlbigClassName是个什么控件? DropDownList? __________________________________________________________________________ txt_Companylx.SelectedValue = dtr( "Companylx ").ToString Companylx里面的值比MlbigClassName要多好几倍都没出错 为什么MlbigClassName会出错呢 大家赶紧帮看下啊 __________________________________________________________________________ dropdownlist __________________________________________________________________________ ..自己解决了 MlbigClassName,这个位置和下面的不对应.. __________________________________________________________________________