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

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I am developing c# windows application using data grid view, i am retrieve my stored data for grid view, but error is came. this is for my first column code,

C#

dgvfind.Columns[0].HeaderText = "SL NO";
                       dgvfind.Columns[0].Name = "SL NO";
                       dgvfind.Columns[0].DataPropertyName = "slno";

but error is came first line. Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index, Any one please guide me.

What I have tried:

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

Posted 27-Jul-16 6:17am

Boopalslm

Updated 27-Jul-16 7:25am

Karthik_Mahalingam

v2

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Jochen Arndt · Answer 1 · 2016-07-27T06:27:00

Solution 1

It seems that your DataGridView has no columns. Did you forgot to set the DataGridView.ColumnCount Property (System.Windows.Forms)[^]?

Posted 27-Jul-16 6:27am

Jochen Arndt

Comments

Boopalslm 27-Jul-16 12:34pm

sir super, working fine,thanks a lot, i am spending more than 5 hrs above for this error,thanks a lot.

Boopalslm 27-Jul-16 12:47pm

sir one more doubt, how to bind null values in text box,

this is my text box bind code

txtstaff.Text = dr[0].ToString();

values cannot dispaly. Give me some ideas. Above text box having null values and some rows having text.

Jochen Arndt 27-Jul-16 13:01pm

This is not related to the initial question. So you should raise a new one. Then also others here will see it and might answer.

But it is not quite clear for me of what type the objects (txtStaff, dr) are. So you should add some more information when raising a new question.

Patrice T · Answer 2 · 2016-07-27T06:31:00

Solution 2

First, check that dgvfind is the expected object and not null.
Then check the number of comumns, and ensure you have at least 1 column before trying to access.

Posted 27-Jul-16 6:31am

Patrice T

Karthik_Mahalingam · Answer 3 · 2016-07-27T07:25:00

This error occured due to two reasons,
1)Either you are trying to access the columns before the datasource is assigned to the datagrid view or
2) The data source might be null

one simple validation does the job

C#

if (dgvfind.DataSource != null && dgvfind.ColumnCount > 0)
            {
                dgvfind.Columns[0].HeaderText = "SL NO";
                dgvfind.Columns[0].Name = "SL NO";
                dgvfind.Columns[0].DataPropertyName = "slno";
            }