Server Error in '/' Application.

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

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.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Source Error:


Line 185:        GridView1.DataSource = dt; 
Line 186:        GridView1.DataBind();
Line 187:        RadioButton rb = (RadioButton)GridView1.Rows[0].Cells[0].FindControl("RadioButton1");
Line 188:        rb.Checked = true;
Line 189:        conn.Close();

Source File: c:\inetpub\vhosts\babest.ir\httpdocs\productdetails.aspx.cs    Line: 187

Stack Trace:


[ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index]
   System.Collections.ArrayList.get_Item(Int32 index) +12905985
   System.Web.UI.WebControls.GridViewRowCollection.get_Item(Int32 index) +15
   productdetails.pricee() in c:\inetpub\vhosts\babest.ir\httpdocs\productdetails.aspx.cs:187
   productdetails.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\babest.ir\httpdocs\productdetails.aspx.cs:136
   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:4.8.4494.0