CODEWITHSUNDEEP
c#asp.netgridview
user6656728
user6656728

Reputation:

index was out of range in asp.net gridview

i am creating a web app in which i have a gridview and on the pre-render method, i have following code

protected void dgvEdit_PreRender(object sender, EventArgs e)
        {
            if (this.dgvEdit.EditIndex != -1)
            {
                FileUpload fp = (FileUpload)dgvEdit.Rows[dgvEdit.EditIndex].FindControl("fpTask");
                if (fp != null)
                {
                    // You can apply condition here
                    fp.Enabled = true;
                }

            }
        }

but the page is showing me the error

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

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

on this line

Line 329: FileUpload fp = (FileUpload)dgvEdit.Rows[dgvEdit.EditIndex].FindControl("fpTask");

what is wrong with the following code

Upvotes: 0

Views: 764

Answers (1)

A_Sk
A_Sk

Reputation: 4630

The reason behind showing this error is dgvEdit.Rows.Count<dgvEdit.EditIndex in Line No 329.

You can use a Condition like

if (this.dgvEdit.EditIndex != -1 && dgvEdit.Rows.Count>=dgvEdit.EditIndex)
            {
                FileUpload fp = (FileUpload)dgvEdit.Rows[dgvEdit.EditIndex].FindControl("fpTask");
                if (fp != null)
                {
                    // You can apply condition here
                    fp.Enabled = true;
                }

            }

N.B: Use PreRender event to perform any updates before the server control is rendered to the page. Any changes in the view state of the server control can be saved during this event. Such changes made in the rendering phase will not be saved.

I Think you should use RowDataBound for this.

Upvotes: 0

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