mainform.cs

来自「《Windows Mobile平台应用与开发》源码」· CS 代码 · 共 153 行

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

using Microsoft.WindowsMobile.Telephony;

namespace PlayingAPhoneCall
{
	public partial class MainForm : Form
	{
		// 用于构造电话号码
		StringBuilder m_sbNumber = new StringBuilder(16);

		// 记录是否需要清空号码
		// 如果需要清空，则按下某一数字键后，原号码被清空，
		// 而按下的数字成为新号码的第一位
		// 例如，当拨过一次电话后，就需要清空
		bool m_needClear = false;

		public MainForm()
		{
			InitializeComponent();
		}

		/// <summary>
		/// 清空显示的电话号码。
		/// </summary>
		private void m_clearNumber()
		{
			m_sbNumber.Remove(0, m_sbNumber.Length);
		}

		/// <summary>
		/// 将缓存中的电话号码显示在屏幕上。
		/// </summary>
		private void m_refreshNumber()
		{
			m_lblNumber.Text = m_sbNumber.ToString();
		}

		/// <summary>
		/// 向号码中追加一个数字。
		/// </summary>
		/// <param name="num">要追加的数字。</param>
		private void m_appendNumber(char num)
		{
			if (m_needClear)
				m_clearNumber();

			m_sbNumber.Append(num);

			m_refreshNumber();
			m_needClear = false;
		}

		private void m_btnNum1_Click(object sender, EventArgs e)
		{
			m_appendNumber('1');
		}

		private void m_btnNum2_Click(object sender, EventArgs e)
		{
			m_appendNumber('2');
		}

		private void m_btnNum3_Click(object sender, EventArgs e)
		{
			m_appendNumber('3');
		}

		private void m_btnNum4_Click(object sender, EventArgs e)
		{
			m_appendNumber('4');
		}

		private void m_btnNum5_Click(object sender, EventArgs e)
		{
			m_appendNumber('5');
		}

		private void m_btnNum6_Click(object sender, EventArgs e)
		{
			m_appendNumber('6');
		}

		private void m_btnNum7_Click(object sender, EventArgs e)
		{
			m_appendNumber('7');
		}

		private void m_btnNum8_Click(object sender, EventArgs e)
		{
			m_appendNumber('8');
		}

		private void m_btnNum9_Click(object sender, EventArgs e)
		{
			m_appendNumber('9');
		}

		private void m_btnStar_Click(object sender, EventArgs e)
		{
			m_appendNumber('*');
		}

		private void m_btnNum0_Click(object sender, EventArgs e)
		{
			m_appendNumber('0');
		}

		private void m_btnSharp_Click(object sender, EventArgs e)
		{
			m_appendNumber('#');
		}

		private void m_btnBackspace_Click(object sender, EventArgs e)
		{
			if(m_sbNumber.Length > 0)
				m_sbNumber.Remove(m_sbNumber.Length - 1, 1);

			m_refreshNumber();
		}

		private void m_btnClear_Click(object sender, EventArgs e)
		{
			m_clearNumber();
			m_refreshNumber();
		}

		private void m_btnCall_Click(object sender, EventArgs e)
		{
			Phone p = new Phone();

			try
			{
				p.Talk(m_lblNumber.Text);
			}
			catch(Exception ex)
			{
				MessageBox.Show(
					String.Format("Error: {0}", ex.Message),
					"Talk",
					MessageBoxButtons.OK,
					MessageBoxIcon.Hand,
					MessageBoxDefaultButton.Button1);
			}
		}
	}
}