How to get a text box multiple values in data table columns

Ok say you have 5 textboxes and you want 5 columns then do this

protected void Button1_Click(object sender, EventArgs e)
{

DataTable dt = new DataTable();
String col1 = textBox1.Text;
String col2 = textBox2.Text;
String col3 = textBox3.Text;
String col4 = textBox4.Text;
String col5 = textBox5.Text;

dt.Rows.Add();
dt.Columns.Add(new DataColumn(col1));
dt.Columns.Add(new DataColumn(col2));
dt.Columns.Add(new DataColumn(col3));
dt.Columns.Add(new DataColumn(col4));
dt.Columns.Add(new DataColumn(col5));

dataGridView1.DataSource = dt;

// Do bindings after columns have been added
}