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

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Hi Guys

Hope that everyone is well.

I am using a SelectedIndexChanged event for a button on a gridview.

The button calls the following method

public void DataView()
        {
         
           GridViewRow gvrow = UssdGridView.SelectedRow;
 
            DataKey dRow = UssdGridView.DataKeys[gvrow.DataItemIndex];
            string testID = dRow[0].ToString(); 
            var test = testID;
            string[] transEntryRecArray = test.Split('|');
            //string[] transStatus = transEntryRecArray[3].Split('=');
            string[] transDesc = transEntryRecArray[5].Split('=');
            string[] errorCode = transEntryRecArray[4].Split('=');
       
            ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + " Error Code = " + errorCode[1] + "." + "\\n" + " Transaction Description = " + transDesc[1] + "." + "');", true);
        }

now when I use a PageIndexChanging event, the code

DataKey dRow = UssdGridView.DataKeys[gvrow.DataItemIndex];

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

What am I doing wrong?

Posted 23-Apr-14 0:16am

ShivaniN016

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Comments

Er Daljeet Singh 23-Apr-14 6:21am

Just use debugger and check whether "GridViewRow gvrow = UssdGridView.SelectedRow;" this line having value of not.

ShivaniN016 23-Apr-14 6:26am

HI Daljeet, I can see a count of 10 which is correct.

Er Daljeet Singh 23-Apr-14 6:34am

Check the value for "gvrow.DataItemIndex"

ShivaniN016 23-Apr-14 6:37am

the value is 5 on the PageIndexChanging event,on the page load data which works,that value is 0

Er Daljeet Singh 23-Apr-14 6:43am

try to maintain the value of DataItemIndex in a variable and use that variable outside the PageIndexChangedEvent

ShivaniN016 23-Apr-14 7:02am

Thank you for your suggestion, I will try that and report back.

BELGIUMsky 23-Apr-14 7:27am

Maybe the solution for this question can help you
get datakey from selected item[^]

ShivaniN016 23-Apr-14 7:42am

Hi BELGIUMsky. i tried that and it did not work.

BELGIUMsky 23-Apr-14 7:53am

Hi Shiv016,

so you tried to use the datasource instead of the gridview to get the datakey?

ps:
u use gvrow.DataItemIndex can you try to use gvrow.RowIndex instead?
the rowindex is something i see returning in some sites i looked at

Herman<T>.Instance 23-Apr-14 8:07am

you state:
<pre lang="css">GridViewRow gvrow = UssdGridView.SelectedRow;

DataKey dRow = UssdGridView.DataKeys[gvrow.DataItemIndex];</pre>

what if you have no SelectedRow? What is gvrow?

BELGIUMsky 23-Apr-14 8:13am

Actualy (what if there is no selectedrow) is not a bad comment.

Shiv016 when is the error ocuring?

1. when you select a row.
2. when you select multiple rows.
3. when you deselect the selected row / rows

ShivaniN016 23-Apr-14 8:25am

@BELGIUMsky, on page index change..so if i go from page index 1 to page index 2 on the grid view,it occurs on page index 2 when i select a row but it works on page index 1..

Herman<T>.Instance 23-Apr-14 8:30am

you select a row after you have changed pages. Maybe that is your problem!

ShivaniN016 23-Apr-14 9:23am

Sorted mate

ShivaniN016 23-Apr-14 8:26am

Hi Digimanus.

The method only fires when I select a row..gvrow is the alias that I use when creating a instance of that selected row.

2 solutions

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**Dnyaneshwar**@Pune · Accepted Answer · 2014-04-23T01:34:00

Solution 1

use following code in pageindexchanging event of gridview

C#

grdView.PageIndex = e.NewPageIndex;
  grdView.DataBind();

Posted 23-Apr-14 1:34am

Dnyaneshwar@Pune

Comments

ShivaniN016 23-Apr-14 7:47am

Hi Dynashwar.

I have that in place already.

[no name] 23-Apr-14 7:57am

Use
DataKey dRow = UssdGridView.DataKeys[gvrow.SelectedIndex];

Herman<T>.Instance 23-Apr-14 8:06am

and what if there is no SelectedIndex?

BELGIUMsky 23-Apr-14 8:11am

sorry but your code you show right now is just the same that the user uses.

ShivaniN016 23-Apr-14 8:34am

I do

GridViewRow gvrow = UssdGridView.SelectedRow;

[no name] 23-Apr-14 8:08am

actually what you want to do,can you elobrate this.?

[no name] 23-Apr-14 8:15am

here to get DataKey you are passing the index 'gvrow.DataItemIndex' instead of using actual index of that particular datakey , which is wrong. post your full gridview code and codebehind code

[no name] 23-Apr-14 8:19am

refer
int EmployeeID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Values[0]);
int DepartementID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Values[1]);

ShivaniN016 · Accepted Answer · 2014-04-23T02:30:00

Solution 2

I have fixed it

instead of DataKey dRow = UssdGridView.DataKeys[gvrow.selectedIndex];

I used DataKey dRow = UssdGridView.DataKeys[gvrow.RowIndex];

Thank you Dnyaneshwar

Posted 23-Apr-14 2:30am

ShivaniN016

Updated 23-Apr-14 2:43am

v3

Comments

[no name] 23-Apr-14 8:34am

also put your gridview code

ShivaniN016 23-Apr-14 8:45am

all sorted now ..thank you

[no name] 23-Apr-14 8:59am

welcome