“/”应用程序中的服务器错误。

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行 45: //topte
行 46: string bida = Request["bid"].ToString().Trim().Replace(" ", "+");
行 47: string sida = Request["sid"].ToString().Trim().Replace(" ", "+");
行 48: string sid1 = CryptoHelper.Decrypt(sida.Trim(), key);
行 49: string sid = CryptoHelper.Decrypt(sida.Trim(), key);

[NullReferenceException: 未将对象引用设置到对象的实例。]
txtvz.Page_Load(Object sender, EventArgs e) in d:\virtualhost\localuser\host2864947\www\txtvz.aspx.cs:47
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.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772