datagridview did not show all data of database.

Question

datagridview did not show all data of database it only show one data.

 

DataTable dt = new DataTable();

dt = blcat.getallcategory();

if (dt.Rows.Count > 0)

{

dataGridView1.Rows.Add();

dataGridView1.Rows[i].Cells["calcategory_id"].Value = dt.Rows[0]["category_id"].ToString();

dataGridView1.Rows[i].Cells["calcategory"].Value = dt.Rows[0]["category_name"].ToString();

i++;

}