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 177:        {
Line 178:            MySqlCommand cmd = new MySqlCommand(query, connection);            
Line 179:            int  sayi = Convert.ToInt32(cmd.ExecuteScalar());
Line 180:            if (sayi > 0)
Line 181:            { result = true; }

Source File: c:\inetpub\vhosts\fiyab.org.tr\httpdocs\App_Code\DBManager.cs    Line: 179

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   MySql.Data.MySqlClient.MySqlField..ctor(MySqlConnection connection) +28
   MySql.Data.MySqlClient.NativeDriver.GetFieldMetaData41() +33
   MySql.Data.MySqlClient.NativeDriver.GetFieldMetaData() +39
   MySql.Data.MySqlClient.NativeDriver.ReadColumnMetadata(Int32 count) +39
   MySql.Data.MySqlClient.MySqlDataReader.NextResult() +272
   MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) +675
   MySql.Data.MySqlClient.MySqlCommand.ExecuteScalar() +55
   DBManager.CountBool(String query) in c:\inetpub\vhosts\fiyab.org.tr\httpdocs\App_Code\DBManager.cs:179
   DAL.urunanakategori.altKategoriVarmi(Int32 ID) in c:\inetpub\vhosts\fiyab.org.tr\httpdocs\App_Code\urun.cs:788
   SiteMaster.LoadMenu() in c:\inetpub\vhosts\fiyab.org.tr\httpdocs\SiteMaster.master.cs:44
   SiteMaster.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\fiyab.org.tr\httpdocs\SiteMaster.master.cs:17
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Control.LoadRecursive() +134
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0