private void bunifuMaterialTextbox1_OnValueChanged(object sender, EventArgs e) { if (state == "CAT") { DataTable dt = new DataTable(); dt = BLCAT.SERACH(bunifuMaterialTextbox1.Text); dataGridView1.DataSource = dt; } if (state == "BOOKS") { DataTable dt = new DataTable(); dt = BLBOOKS.SERACH(bunifuMaterialTextbox1.Text); dataGridView1.DataSource = dt; } if (state == "ST") { DataTable dt = new DataTable(); dt = BLST.SERACH(bunifuMaterialTextbox1.Text); dataGridView1.DataSource = dt; } if (state == "SELL") { DataTable dt = new DataTable(); dt = BLSELL.SERACH(bunifuMaterialTextbox1.Text); dataGridView1.DataSource = dt; } if (state == "BRO") { DataTable dt = new DataTable(); dt = BLBRO.SERACH(bunifuMaterialTextbox1.Text); dataGridView1.DataSource = dt; } }