Gridview showing up deleted datas - asp.net

Question

I just display my uploaded file details in my GridView, so there will be only one row in my GridView - multiple files are not allowed.
When I delete that single row and try to upload a new file, it is showing 2 rows (the new file and the deleted file).
I already tried using GridView.DataSource = null and GridView.DataBind().
Note: I've rebinded my GridView after the delete, but it still shows the deleted file.
protected void DeleteLinkButton_Click(object sender, EventArgs e)
{
if (Session["name"] != null)
{
string strPath = Session["filepath"].ToString();
System.IO.File.Delete(strPath);
GridView2.Rows[0].Visible = false;
Label8.Text = "";
Session["filename"] = null;
Button3.Enabled = true;
}
GridView2.DataBind();
}

Answer 1

In some cases I've had to do something like this:
//page level variable
bool refreshRequired = false;
protected void DeleteLinkButton_Click(object sender, EventArgs e)
{
if (Session["name"] != null)
{
string strPath = Session["filepath"].ToString();
System.IO.File.Delete(strPath);
GridView2.Rows[0].Visible = false;
Label8.Text = "";
Session["filename"] = null;
Button3.Enabled = true;
refreshRequired = true;
}
}
protected void Page_PreRender(object sender, EventArgs e)
{
if(refreshRequired)
{
//whatever you to to set your grids dataset, do it here
//but be sure to get the NEW data
}
}
At the time of Delete, your grid is bound to the old data. When you change the data, you must rebind it to the new.