//Ctategory search button private void Categorysearch_Click(object sender, EventArgs e) { try { //value passs to business layer Logclass variable to CategoryClass obj = new CategoryClass(); //check text box empty or not if (textBox1.Text != "") { obj.CategoryId = textBox1.Text; obj.CategoryName = textBox2.Text; // ExecuteNonQuery() if worked return value=truee return value=0 CtegoryClass in BusinessLayer if (obj.CategorySearch() == 1) { textBox1.Text = obj.CategoryId; textBox2.Text = obj.CategoryName; } else { MessageBox.Show("---Can not Search category !---"); } } else { MessageBox.Show("---please enter values !---"); } } catch (Exception ex) { MessageBox.Show("---ERROR IN SQL CONNECTION---" + '\n' + ex); } }