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

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Hi,

when i host my site and access a particular page it shows an error

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

please provide your idea

it shows the error like this.........

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index]
System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) +64
System.ThrowHelper.ThrowArgumentOutOfRangeException() +15
System.Collections.Generic.List`1.get_Item(Int32 index) +7495292
MedVisit_Web.GMapPatientInfo..ctor(VisitDetails visit) +610
MedVisit_Web.AssignMap.SetDataSources() +616
MedVisit_Web.AssignMap.Page_Load(Object sender, EventArgs e) +188
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

--------------------------------------------------------------------------------

regards,
Shefeek

Posted 10-Aug-11 22:32pm

shefeekcm

Updated 6-Jan-17 14:44pm

v3

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*dan!sh* · Answer 1 · 2011-08-10T22:34:00

Solution 1

How about debugging the page? The error message is telling exactly what is the problem with the code.

Update: See this in the stack:

VB

System.Collections.Generic.List`1.get_Item(Int32 index) +7495292
MedVisit_Web.GMapPatientInfo..ctor(VisitDetails visit) +610

You are trying to access some non-existant item in the list.

Posted 10-Aug-11 22:34pm

dan!sh

Updated 10-Aug-11 22:48pm

v2

Comments

shefeekcm 11-Aug-11 4:43am

its working in locally without any problem

dan!sh 11-Aug-11 4:47am

Updated the reply.

shefeekcm 11-Aug-11 4:57am

it does not shows any error when i works in my system

shefeekcm 25-Aug-11 7:58am

you are right....?

Patrice T · Answer 2 · 2017-01-06T14:44:00

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

The message tells you all.
Your code try to access an element that do not exist in an array or list.

Try to run your page on debugger, when error occurs, pay attention to the value of index and to the size of the array/list.

sujit0761 · Answer 3 · 2011-08-10T22:40:00

Solution 2

The is something wrong in your Page Load event , or the initial values set to the controls in the page are not correct.

Please put down you code fragment, we may help you better.

Posted 10-Aug-11 22:40pm

sujit0761

Comments

shefeekcm 11-Aug-11 4:43am

its working in locally without any problem

Rashmikants Monpara · Answer 4 · 2017-01-06T00:13:00

Solution 5

hi please use below method when you used datatable
DataTable dt = new DataTable();
        if (dt.Rows.Count > 0)
        { 
        //Your code
        }

Posted 6-Jan-17 0:13am

Rashmikants Monpara

Comments

Dave Kreskowiak 6-Jan-17 21:09pm

Check the date on the post before you answer.

This question was asked and answered almost SIX YEARS AGO.

[no name] 7-Jan-17 4:49am

so what

[no name] 7-Jan-17 7:50am

So the question was asked and ANSWERED SIX YEARS ago. There is no reason for you to come along and resurrect ancient already answered questions just so you can get some rep points that don't mean anything.

Kaviya R 17-Jun-21 2:07am

Error in the page

Dave Kreskowiak 17-Jun-21 10:34am

...and that's supposed to mean what in this context?

Nothing. It means nothing at all.

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

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