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Im making a windows forms app to request contact information. I created a class to trim the input text and check if the textbox is empty. I also assigned patterns for the email and phonenumber. However the text isnt following the regex and isnt catching any exceptions either.

the form only has one button and it should compile and present the information inserted into the textbox.

I used the Get request method for the strings collected from the textbox. Here is the bool.

 bool GetPhone(ref string phonenumber)

 bool success = true;
 try
 
 txtPhone.Text=Input.TrimText(txtPhone.Text);
 if (Input.IsTextEmpty(txtPhone.Text))
 throw new InputRequiredException();

 phonenumber = txtPhone.Text;
 Regex Regphone = new Regex(@"^(+d1,2s)?(?d3)?[s.-]d3[s.-]d4$");
 Match matchphone = Regphone.Match(phonenumber);
 if (matchphone.Success)
 success = true;
 else throw new InputRequiredException();
 
 catch(Exception error)
 
 string remediation = "Enter a valid phone number.";
 Input.ShowError(error, remediation);
 Input.SelectText(txtPhone);
 
 try
 
 int Phone = Convert.ToInt32(txtPhone.Text);

 success = true;
 
 catch (Exception error)
 
 string remediation = "Enter a valid phone number.";
 Input.ShowError(error, remediation);
 Input.SelectText(txtPhone);

 
 return success;

Input class

 class Input


 static public string TrimText(string A)
 
 return A.Trim();
 

 internal static bool IsTextEmpty(string A)
 
 if (string.IsNullOrEmpty(A))
 
 return true;
 

 else
 
 return false;
 
 

 internal static void ShowError(object error, string remediation)
 

 

 static public void SelectText(TextBox textBox1)
 
 textBox1.SelectAll();
 

Exception class

 internal class InputRequiredException : Exception

 public InputRequiredException()
 
 

 public InputRequiredException(string message) : base(message)
 
 message = "Invalid Input.";
 

 public InputRequiredException(string message, Exception innerException) : base(message, innerException)
 
 

 protected InputRequiredException(SerializationInfo info, StreamingContext context) : base(info, context)
 
 

The form contains one button and the code for clicking on it is:

 private void btnContact_Click(object sender, EventArgs e)
 
 // Input variables
 string quantity = string.Empty;
 string name = string.Empty;
 string emailpattern = @"^[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]2,$";
 string phonenumber = @"^(+d1,2s)?(?d3)?[s.-]d3[s.-]d4$";

 // Contact Date
 DateTime contactDate = DateTime.MinValue;

 // Contact Method
 ContactMethod method = ContactMethod.Unassigned;

 // Gather inputs
 if
 (
 GetContactDate(ref contactDate) &&
 GetContactMethod(ref method) &&
 GetEmail(ref emailpattern) &&
 GetName(ref name) &&
 GetQuantity(ref quantity) &&
 GetPhone(ref phonenumber)
 )
 
 // Submit contact request and close the form
 string format =
 "Your contact request has been entered.nn" +
 "Quantity: 0n" +
 "Name: 1n" +
 "Email: 2n" +
 "Phone: 3n" +
 "Contact Date: 4:Dn" +
 "Contact Method: 5n";
 string msg = string.Format(format, quantity, name, emailpattern, phonenumber, contactDate, method);
 MessageBox.Show(msg, Application.ProductName);

 Close();
 
 

There are no errors showing in the code and the program runs smoothly but I am not getting the desired output. What I need from the code is to accept the inputs in the textbox, validate them according to the regex pattern and return the value inputted by the user. The code should throw an exception if the textbox is empty or the input is invalid. Currently, the textbox is accepting any and all values, without any exceptions. If I don't enter any value it simply returns the pattern. I am an utter noob when it comes to coding and I understand the code might have logical errors. Whether there is one mistake or multiple or if the code is simply unfinished please feel free to let me know.