[InvalidCastException: 无法将类型为“System.DBNull”的对象强制转换为类型“System.String”。]
gsg.DAL.GyService.GetList(String value) +864
list_listtwo.Bind() +224
list_listtwo.Page_Load(Object sender, EventArgs e) +24
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +85
System.Web.UI.Control.OnLoad(EventArgs e) +79
System.Web.UI.Control.LoadRecursive() +130
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2821
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