“/”应用程序中的服务器错误。

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行 28: string key = "ABCDEFGHIJKLMNOP";
行 29: string bida = Request["bid"].ToString().Trim().Replace(" ", "+");
行 30: string sida = Request["sid"].ToString().Trim().Replace(" ", "+");
行 31: string ssida = Request["ssid"].ToString().Trim().Replace(" ", "+");
行 32: string sid1 = CryptoHelper.Decrypt(sida.Trim(), key);

[NullReferenceException: 未将对象引用设置到对象的实例。]
zm.Page_Load(Object sender, EventArgs e) in d:\virtualhost\localuser\host2864947\www\zm.ascx.cs:30
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.Web.UI.Control.OnLoad(EventArgs e) +92
System.Web.UI.Control.LoadRecursive() +54
System.Web.UI.Control.LoadRecursive() +145
System.Web.UI.Control.LoadRecursive() +145
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772