customerform.cs

微软（Microsoft）出版社C井练习文件及解答

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace CustomerDetails
{
	public partial class CustomerForm : Form
	{
		public CustomerForm()
		{
			InitializeComponent();
		}

		// Cross check the gender and the title to make sure they correspond
		private bool checkTitleAndGender()
		{
			if (title.Text == "Mr")
			{
				// Check that gender is Male
				if (!male.Checked)
				{
					errorProvider.SetError(gender, "If the title is Mr " +
						"the gender must be male");
					errorProvider.SetError(title, "If the gender is " +
						"female the title must be Mrs, Miss, or Ms");
					return false;
				}
			}
			else
			{
				// Check that the gender is Female
				if (!female.Checked)
				{
					errorProvider.SetError(gender, "If the title is Mrs, " +
						"Miss, or Ms the gender must be female");
					errorProvider.SetError(title, "If the gender is male " +
						"the title must be Mr");
					return false;
				}
			}

			// Title and gender match - clear any errors
			errorProvider.SetError(gender, "");
			errorProvider.SetError(title, "");
			return true;
		}


		private void exitClick(object sender, EventArgs e)
		{
			this.Close();
		}

		private void saveClick(object sender, EventArgs e)
		{
			if (checkTitleAndGender())
			{
				statusMessages.ForeColor = Color.Black;
				statusMessages.Text = "Customer Saved";
			}
			else
			{
				statusMessages.ForeColor = Color.Red;
				statusMessages.Text = "Customer title and gender are inconsistent. Changes not saved";	
			}
		}
	}
}