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;
}