C# windows validation by ErrorProvider Control

C# Windows Validation by ErrorProvider

 

In ASP.Net 2.0 we use different Validation controls from Toolbox for validations (Just Drag & Drop, No need of writing code in C#). But in Case of C# windows application this feature is not available so we use Error Provider control to do any type of validation.

For example:-

 

If we take a Employee data…

1. Name (text)
2. Age (Integer)
3. Salary (Double)

 

Form looks like

 

 

 

In ADD button click you need to write the following code.

 

private void ADD_Click(object sender, EventArgs e)

{

  if (is_validate())

  {

    errorProvider1.Clear();

    // Write Coding to add into database

    MessageBox.Show(“Data Successfully Added”);

  }

}

 

private bool is_validate()

{

  bool no_error = true;

  if (txtname.Text == string.Empty)

  {

    errorProvider1.SetError(txtname, “Text Missing”);

    no_error = false;

  }

  else

  {

    // Clear all Error Messages

    try

    {

      int i = Convert.ToInt32(txtage.Text);

    }

    catch

    {

      errorProvider1.Clear(); // Clear all Error Messages

      errorProvider1.SetError(txtage, “Enter Valid Age”);

      return false;

    }

    try

    {

      double j = Convert.ToDouble(txtsalary.Text);

    }

    catch

    {

      errorProvider1.Clear(); // Clear all Error Messages

      errorProvider1.SetError(txtsalary, “Enter Valid Salary”);

      return false;

    }

   }

   return no_error;

}

 

Here one Error Provider Control can be used for multiple fields.

 

That’s it. It’s all done. Its Very Simple isn’t it??