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

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I am using ajax maksed edit extender for calender control.
but using this when i click the edit button of my grid it does not react and using debug it shows the error that Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index on edit...
when i commented the ajax masked edit extender the grid works perfect with edit.
So tell me what is the problem?????
Thanx in advance...

Posted 30-Aug-12 20:33pm

sasha rahil

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_Amy 31-Aug-12 2:48am

Where is the code?

bbirajdar 31-Aug-12 2:50am

There is problem in your code. You need to check the Items count before you use the collection item with index

Adittya Gupta 5-Sep-12 5:22am

Can you post your code or error stack trace this will help us in understanding problem more clearly.

6 solutions

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_Amy · Answer 1 · 2012-08-30T20:50:00

The error means you are accessing a collection with index less than zero or greater than its capacity. Note that the index is 0 based so if you have 3 items, the available indexes are 0,1,2.
Try stepping through your code and you will be able to figure out which collection is throwing this error.

--Amit

Aarti Meswania · Answer 2 · 2012-08-30T21:06:00

this error comes when there is no such index available in object

it's about you have 3 cards B,C,D but I am asking for 'A' or 'Z'

eg.
grid1 have 2 rows

rowno   index
1       0
2       1

Now if we try to fetch 3rd row (means index=2) this kind of error occur

C#

grid1.rows[2].cells[0].value // it will throw exception

check your code some where same thing happened as above example

to solve error,
write protective conditions so that such situation never occur
eg.

C#

if (RowId > grid1.rows.count-1) //condition is protecting inner statement so, if suppose RowId=3 then it will not go to execute inner statement
    grid1.rows[RowId].cells[0].value

Happy Coding!
:)

**AmitGajjar** · Answer 3 · 2012-08-30T21:08:00

Solution 3

Hi,

As you have not post your code along with question we can just assume how your code would be.

IndexOutOfRange exception occur when you are requesting for nonexisting index in the Array or Collection.

How to reproduce this exception : Example

C#

int[] array = new int[100];
array[120] = 3; // Here 120 index is not exist as array is of size 100

For more information Refer : MSDN IndexOutOfRangeException[^]

Hope you findout your issue yourself. Next time when you post your question, also post the line of code where you are getting exception.

Thanks
-Amit Gajjar

Posted 30-Aug-12 21:08pm

AmitGajjar

Comments

sasha rahil 31-Aug-12 3:25am

sorry for not adding code
here is my code

public void SetEditRowData(int val)
{
try
{
if (dgProductCategory.Rows.Count == 0) return;
dgProductCategory.Rows[val].BackColor = Color.FromName(cCommonValues.gridhighlighted);
List<ProductCategoryEntity> _listView = (List<ProductCategoryEntity>)ViewState["list"];

foreach (ProductCategoryEntity item in _listView)
{
if (item.product_category_id == Convert.ToInt32(ViewState["product_category_id"]))
{
dtpactivefrom.Text = Convert.ToString(item.active_from);
dtpactiveto.Text = Convert.ToString(item.active_to);
txtengname.Value = item.engname.ToString();
txtothername.Value = item.othername.ToString();

}
}
if (Session["EditMode"] != null)
{
btnSave.Visible = false;
}
else
{
btnSave.Text = Resources.Resource.Update_Button.ToString();
btnSave.Visible = true;

}

txtengname.Focus();
}
catch (Exception ex)
{
}
}

AmitGajjar 31-Aug-12 3:50am

And on which line you are getting this error?

sasha rahil · Answer 4 · 2012-08-31T21:13:00

Solution 4

I just used Onclientclick for the edit button and it worked.....
Strangest but worked....

Posted 31-Aug-12 21:13pm

sasha rahil

sasha rahil · Answer 5 · 2012-09-04T19:47:00

Solution 5

The other option which i tried and worked was commenting the maskededitvalidator and using regular expression in stead of that...and it worked too..

Posted 4-Sep-12 19:47pm

sasha rahil

ChinaPan · Answer 6 · 2012-09-04T19:58:00

Solution 6

Index out of range, the code posted a look！Or send to my mailbox！Email:pan@baletu.com

Posted 4-Sep-12 19:58pm

ChinaPan

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

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