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 102:        {
Line 103:            MySqlCommand cmd = new MySqlCommand(query, connection);            
Line 104:            string  sayi = cmd.ExecuteScalar().ToString();
Line 105:            if (sayi == "0")
Line 106:            { result = true; }

Source File: d:\vhosts\zemedya.com\adnhediye.com\App_Code\DBManager.cs    Line: 104

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() +40
   MySql.Data.MySqlClient.NativeDriver.ReadColumnMetadata(Int32 count) +39
   MySql.Data.MySqlClient.MySqlDataReader.NextResult() +272
   MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) +678
   MySql.Data.MySqlClient.MySqlCommand.ExecuteScalar() +55
   DBManager.CountBool(String query) in d:\vhosts\zemedya.com\adnhediye.com\App_Code\DBManager.cs:104
   ADN.urunanakategori.altKategoriVarmi(Int32 ID) in d:\vhosts\zemedya.com\adnhediye.com\App_Code\urun.cs:599
   urunler.getMenuPromosyon(String ID) in d:\vhosts\zemedya.com\adnhediye.com\urunler.aspx.cs:147
   urunler.Page_Load(Object sender, EventArgs e) in d:\vhosts\zemedya.com\adnhediye.com\urunler.aspx.cs:45
   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.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0