protected void BtnSaveDetails_Click(object sender, EventArgs e) { //string to store the validation error string validationError = ""; //create instance of clsCandidate clsCandidate aCandidate = new clsCandidate(); //assign the data to the validation method. We have no candidateNo for new candidates so just use "1" validationError = aCandidate.CandidateValidation("1", txtCandidateRegistrationCandidateTitle.Text, txtCandidateRegistrationCandidateFirstName.Text, txtCandidateRegistrationCandidateLastName.Text, txtCandidateRegistrationCandidateBirthDate.Text, txtCandidateRegistrationCandidateAddress.Text, txtCandidateRegistrationCandidatePostCode.Text, txtCandidateRegistrationCandidatePhone.Text, txtCandidateRegistrationCandidateEmail.Text, txtCandidateRegistrationCandidateUserName.Text, txtCandidateRegistrationCandidatePassword.Text, txtCandidateRegistrationCandidateConfirmPassword.Text, txtCandidateRegistrationCandidateSecurityAnswer.Text, lblCandidateRegistrationDateRegistered.Text); //if there are no validation errors if (validationError == "") { //create an instance of clsCandidateCollection clsCandidateCollection theCandidateCollection = new clsCandidateCollection(); //pass in the data of someCandidate in the newCandidate object theCandidateCollection.SomeCandidate.CandidateTitle = txtCandidateRegistrationCandidateTitle.Text; theCandidateCollection.SomeCandidate.CandidateFirstName = txtCandidateRegistrationCandidateFirstName.Text; theCandidateCollection.SomeCandidate.CandidateLastName = txtCandidateRegistrationCandidateLastName.Text; theCandidateCollection.SomeCandidate.CandidateBirthDate = Convert.ToDateTime(txtCandidateRegistrationCandidateBirthDate.Text); theCandidateCollection.SomeCandidate.CandidateAddress = txtCandidateRegistrationCandidateAddress.Text; theCandidateCollection.SomeCandidate.CandidatePostCode = txtCandidateRegistrationCandidatePostCode.Text; theCandidateCollection.SomeCandidate.CandidatePhone = txtCandidateRegistrationCandidatePhone.Text; theCandidateCollection.SomeCandidate.CandidateEmail = txtCandidateRegistrationCandidateEmail.Text; theCandidateCollection.SomeCandidate.CandidateUsername = txtCandidateRegistrationCandidateUserName.Text; theCandidateCollection.SomeCandidate.CandidatePassword = txtCandidateRegistrationCandidatePassword.Text; theCandidateCollection.SomeCandidate.CandidateSecurityAnswer = txtCandidateRegistrationCandidateSecurityAnswer.Text; theCandidateCollection.SomeCandidate.CandidateCVFile = "no file path"; //execute the AddCandidate method, to add a new candidate to database if (theCandidateCollection.AddCandidate()) { //if the result of AddCandidate is true register Response.Redirect("CandidateSaveConfirmation.aspx"); } } //if there is a validation error if (validationError != "") { //display validation error lblCandidateRegistrationValidationError.Text = validationError; } }