Παιδιά καλημέρα.
έχω φτιάξει μια βάση δεδομένων sql για registration, έχω φτιάξει και την σελίδα με τα αντίστοιχα κουμπιά και όλα καλά μέχρι εδώ.
μόλις τρέχω την εφαρμογή και πατάω το κουμπί για να σώσει την εγγραφή μου βγάζει αυτό το λάθος.κάτι έχω ξεχάσει αλλά δεν μπορώ να το βρω;;;;
μπορεί να βοηθήσει κάποιος;;;
Server Error in '/' Application.
Object reference not set to an instance of an object.
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.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 18: {
Line 19: //Create ConnectionString and Inser Statement
Line 20: string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; string insertSql = "INSERT INTO registerdb (FirstName,LastName,UserName,Password,Email,Address,Gender)"
Line 21:
Line 22: + " values (@FirstName,@LastName,@UserName,@Password,@Email,@Address,@Gender)"; |
Source File: c:\Users\Ecelon\Documents\Visual Studio 2012\WebSites\register\reg.aspx.cs Line: 20
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
reg.btnSave_Click(Object sender, EventArgs e) in c:\Users\Ecelon\Documents\Visual Studio 2012\WebSites\register\reg.aspx.cs:20
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9553594
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +103
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724
|
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.17929