i wanna change column name in datagridview at run time

DataGridView has a column name attribute which is set to the underlying collections fielname but can be changed after you bind the data to the DGV (at which point the DGV has columns to manipulate.)

Refer these which will help you
http://forums.asp.net/t/1794771.aspx[^]

Required to change the column name of gridview dynamically at runtime[^]

protected void gridview1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Header)
        {
            e.Row.Cells[0].Text = "Name";
            e.Row.Cells[1].Text = "E-mail";
            e.Row.Cells[2].Text = "Place";
        }
    }

hi Try this code...

private void Form1_Load(object sender, EventArgs e)
       {
           DataTable dt = new DataTable();
           dt.Columns.Add("Name", typeof(string));
           dt.Columns.Add("address", typeof(string));
           dt.Rows.Add("karthik","bangalore");
           dt.Rows.Add("parthi", "gujrat");
           Dictionary<string, string> dictMapping = new Dictionary<string, string>();
           dictMapping.Add("Name", "Name-Modified");
           dictMapping.Add("address", "address-Modified");

           dataGridView1.DataSource = dt;
           foreach (DataGridViewColumn col in dataGridView1.Columns)
           {
               string colheader = col.HeaderText;
               var key = dictMapping.Keys.FirstOrDefault(k => k == colheader);
               if (key != null)
                   col.HeaderText = dictMapping[key];
           }


       }

//you can try this code.

DataGridView.Columns["P_Name"].HeaderText="Name";