Server Error in '/' Application.

StartIndex cannot be less than zero.
Parameter name: startIndex

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: StartIndex cannot be less than zero.
Parameter name: startIndex

Source Error:


Line 582:                                    {
Line 583:                                        int lstIndex = r["s_Path"].ToString().LastIndexOf('.');
Line 584:                                        string dtype = r["s_Path"].ToString().Substring(lstIndex);
Line 585:                                        switch (dtype)
Line 586:                                        {

Source File: c:\Temp\DUTHAOVANBAN\Detail.aspx    Line: 584

Stack Trace:


[ArgumentOutOfRangeException: StartIndex cannot be less than zero.
Parameter name: startIndex]
   System.String.Substring(Int32 startIndex, Int32 length) +15053996
   ASP.detail_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) in c:\Temp\DUTHAOVANBAN\Detail.aspx:584
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +250
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +250
   System.Web.UI.Page.Render(HtmlTextWriter writer) +39
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8753


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4087.0