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:                ltUstBaslik.Text = "<li><a href=\"/YedekParca.aspx\" title=\"YEDEK PARÇA\">YEDEK PARÇA</a></li>";
Line 104:                ltUstBaslik.Text += "<li><a href=\"/YedekParca.aspx?KatID=" + Session["KategoriID"].ToString() + "&Baslik=" + Session["KategoriAd"].ToString() + "\" title=\"" + Session["KategoriAd"].ToString() + "\">" + Session["KategoriAd"].ToString() + "</a></li>";
Line 105:                conn.Open();
Line 106:                SqlCommand cmdIcerik = new SqlCommand("SELECT * FROM Marka WHERE Durum=2 AND DataID=" + Request.QueryString["Marka"], conn);

Source File: d:\vhosts\qaremedia.site\mobilaracservis.com\YedekParca.aspx.cs    Line: 104

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   YedekParca.Page_Load(Object sender, EventArgs e) in d:\vhosts\qaremedia.site\mobilaracservis.com\YedekParca.aspx.cs:104
   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