This will be a great help for me to carry my project further.

I need to check the text box value(form) with database. If it exist I try to show warning message and if not ask the user to enter the values.

I try to implement this code with Windows form,MVC format.

Can you provide sample code for this? Any suggestion ideas?

Thank You.

You can do (search from database) in many ways - executing queirues or LINQ to SQL or EntityDataModel. Please show your code to us so we can suggest or guide you on that issue.

commented: View: private void textBox1_KeyDown(object sender, KeyEvent Args e) if (e.KeyCode == Keys.Enter) { MessageBox.Show(controller.CheckAndGetBarcode()); } } Model: public class ProductModel { public string s; public st +0