import Data from Excel to under The columns of DatagridView.

Question

Dear Friends

first I want to say thank you all , You have a stuning Job here.

Secondly,

I Want to Import Data from Excel File to My DataGrideview columns.

I tried but data coms after My added columns.Please, Check my code bellow.

private void button8_Click_1(object sender, EventArgs e)
       {
           string content = "provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + strExcelPathName.Text + "; Extended Properties=\"Excel 8.0;\";";
           OleDbConnection con = new OleDbConnection(content);
           OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM[" + txtSheet.Text + "$]", con);
           DataTable dt = new DataTable();
           oda.Fill(dt);
           dataGridView1.DataSource = dt;
       }

please, help me