一个UnversalTime与本地时间相互转换的工具

这是个小例侱，用于UnversalTime与本地时间的相互转换，最底下的两个空格时用来计算离现在X小时Y分前的时间的。本例程用Visual Studio 2010开发。.NET Framework 4.0。由于嫌麻烦我把修改DateTimePicker值的方法写成了一个事件。这个例程也可以算是个自定义事件的例程吧。

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

namespace UTC_LocalTime
{
public partial class Form1 : Form
{
private DatePickUnit dpu = new DatePickUnit();

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
string FormatString = "yyyy年M月d日 H:mm"; //y年，M月，d日，H24小时制,h12小时制,s秒
dateTimePicker1.CustomFormat = FormatString;
dateTimePicker2.CustomFormat = FormatString;
dateTimePicker1.Format = DateTimePickerFormat.Custom;
dateTimePicker2.Format = DateTimePickerFormat.Custom;
dpu.UniversalTimePicker = dateTimePicker1;
dpu.LocalTimePicker = dateTimePicker2;
dpu.TimeChange += new DatePickUnit.TimeChangeHandler(dpu_TimeChange);
dpu.ChangeTime(DateTime.Now,false);
}

void dpu_TimeChange(DateTimePicker UniversalTimePicker, DateTimePicker LocalTimePicker, DateTime TimeValue, bool IsUniversalTimeChanged)
{
if (IsUniversalTimeChanged)
{
LocalTimePicker.Value = TimeValue;
}
else
{
UniversalTimePicker.Value = TimeValue.ToUniversalTime();
}
}

private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{
dpu.ChangeTime(dateTimePicker1.Value.ToLocalTime(), true);
}

private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
{
dpu.ChangeTime(dateTimePicker2.Value, false);
}

private void button1_Click(object sender, EventArgs e)
{
string strHours = textBox1.Text;
string strMinutes = textBox2.Text;
int hours = 0;
int minutes = 0;
hours = Convert(strHours,true);
minutes = Convert(strMinutes,false);
DateTime current = DateTime.Now;
current = current.AddHours(-1 * hours);
current = current.AddMinutes(-1 * minutes);
dpu.ChangeTime(current, false);
textBox1.Text = "";
textBox2.Text = "";
}

private int Convert(string strValue,bool IsHour)
{
int result = 0;
string strTitle = string.Empty;
try
{
if (strValue.Length > 0)
{
result = int.Parse(strValue);
}
}
catch (Exception ex)
{
if (ex is FormatException)
{
if (IsHour)
{
strTitle = "小时";
}
else
{
strTitle = "分钟";
}
MessageBox.Show(strTitle + "数字格式错误，请重新设定！", strTitle + "格式错误",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}
return result;
}
}

internal class DatePickUnit
{
public DateTimePicker UniversalTimePicker{set;get;}
public DateTimePicker LocalTimePicker{set;get;}
public delegate void TimeChangeHandler(DateTimePicker UniversalTimePicker,DateTimePicker LocalTimePicker,DateTime TimeValue,bool IsUniversalTimeChanged);
public event TimeChangeHandler TimeChange;

public void ChangeTime(DateTime time,bool IsUniversalTimeChanged)
{
TimeChange(UniversalTimePicker, LocalTimePicker, time,IsUniversalTimeChanged);
}
}
}

相关资源：http://download.csdn.net/detail/tx_officedev/3895915