يا شباب اخترت الرغبات ونسقتها ولم يبقى لي غير الخطوة التالية بالفعل اخترتها لكنها تحولت الصفحة هكذا :
Server Error in '/' Application.
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.
[FONT=Arial, Helvetica, Geneva, SunSans-Regular, sans-serif]Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. [/FONT]
[FONT=Arial, Helvetica, Geneva, SunSans-Regular, sans-serif]Exception Details: System.ArgumentException: 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.[/FONT]
[FONT=Arial, Helvetica, Geneva, SunSans-Regular, sans-serif]Source Error: [/FONT]
[FONT=Arial, Helvetica, Geneva, SunSans-Regular, sans-serif]An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ArgumentException: 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.] System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +8623897 System.Web.UI.WebControls.ListBox.LoadPostData(String postDataKey, ****ValueCollection postCollection) +360 System.Web.UI.WebControls.ListBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, ****ValueCollection postCollection) +13 System.Web.UI.Page.ProcessPostData(****ValueCollection postData, Boolean fBeforeLoad) +346 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1743
Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082
لا أعلم ماذا أعمل فأنصحوني يا شباب[/FONT]
