private void btnsearch_Click(object sender, EventArgs e) { if (dtdsearchbydate.Text.Length > 0) { DataTable dt = new DataTable(); dt = blod.searchbydate(Convert.ToDateTime(dtdsearchbydate.Text)); if (dt.Rows.Count > 0) { dataGridView1.DataSource = dt; } else { MessageBox.Show("Product Does Not Found"); } } else { MessageBox.Show("Please Enter Text Box"); } }