Text values pass to grid without using DB

DataTable dt = new DataTable();
        DataColumn dc = new DataColumn("name");
        dt.Columns.Add(dc);
        dc = new DataColumn("field");
        dt.Columns.Add(dc);
//Now your table has defined columns
// you can add rows...
 
        DataRow dr = dt.NewRow();
        dr["Name"] = TextBox1.Text;
        dr["field"] = TextBox2.Text;
 
        GridView1.DataSource = dt;
        GridView1.DataBind();