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

Question

When i am click on update button i got this error my update click event

protected void btnUpdate_Click(object sender, CommandEventArgs e)
{
    int idx = Conve         


        

Answer 1

How many rows do you have?

Try this:

int idx = Convert.ToInt32(e.CommandArgument);

if (idx < gvResTasks.Rows.Count)
{
    GridViewRow gr = gvResTasks.Rows[idx];
}

Also, can you provide the btnUpdate ASPX code?

Answer 2

No need to use e.CommandArgument to find the GridViewRow. Just do this

GridViewRow gr = ((Button)sender).NamingContainer as GridViewRow;