我要评论本文所述c#获取和修改系统时间的实现步骤为：系统的时间从 systemtime 结构体中取出，并显示在textbox1上，从setdate,settime控件中获取年，月，日，小时，分钟，秒信息，存入systemtime结构体中，然后使用setlocaltime(ref systemtime)设置为用户指定的时间。本代码编译后会有一个易于操作的窗体。
完整功能代码如下：
using system;
using system.drawing;
using system.collections;
using system.componentmodel;
using system.windows.forms;
using system.data;
using system.runtime.interopservices;
namespace changesystime
{
/// <summary>
/// form1 的摘要说明。
/// </summary>
public class form1 : system.windows.forms.form
{
private system.windows.forms.groupbox groupbox1;
private system.windows.forms.textbox textbox1;
private system.windows.forms.groupbox groupbox2;
private system.windows.forms.button button1;
private system.windows.forms.button button2;
private system.timers.timer timer1;
private system.windows.forms.datetimepicker setdate;
private system.windows.forms.datetimepicker settime;
private system.componentmodel.icontainer components;
[structlayout(layoutkind.sequential)]
public struct systemtime
{
public ushort wyear;
public ushort wmonth;
public ushort wdayofweek;
public ushort wday;
public ushort whour;
public ushort wminute;
public ushort wsecond;
public ushort wmiliseconds;
}
// 用于设置系统时间
[dllimport("kernel32.dll")]
public static extern bool setlocaltime( ref systemtime systime );
// 用于获得系统时间
[dllimport("kernel32.dll")]
public static extern void getlocaltime(ref systemtime systime);
public form1()
{
//
// windows 窗体设计器支持所必需的
//
initializecomponent();
//
// todo: 在 initializecomponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.dispose();
}
}
base.dispose( disposing );
}
#region windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void initializecomponent()
{
this.groupbox1 = new system.windows.forms.groupbox();
this.textbox1 = new system.windows.forms.textbox();
this.groupbox2 = new system.windows.forms.groupbox();
this.settime = new system.windows.forms.datetimepicker();
this.setdate = new system.windows.forms.datetimepicker();
this.button1 = new system.windows.forms.button();
this.button2 = new system.windows.forms.button();
this.timer1 = new system.timers.timer();
this.groupbox1.suspendlayout();
this.groupbox2.suspendlayout();
((system.componentmodel.isupportinitialize)(this.timer1)).begininit();
this.suspendlayout();
//
// groupbox1
//
this.groupbox1.controls.add(this.textbox1);
this.groupbox1.location = new system.drawing.point(32, 24);
this.groupbox1.name = "groupbox1";
this.groupbox1.size = new system.drawing.size(216, 64);
this.groupbox1.tabindex = 0;
this.groupbox1.tabstop = false;
this.groupbox1.text = "系统当前时间";
//
// textbox1
//
this.textbox1.location = new system.drawing.point(16, 24);
this.textbox1.name = "textbox1";
this.textbox1.readonly = true;
this.textbox1.size = new system.drawing.size(184, 21);
this.textbox1.tabindex = 1;
this.textbox1.text = "";
//
// groupbox2
//
this.groupbox2.controls.add(this.settime);
this.groupbox2.controls.add(this.setdate);
this.groupbox2.location = new system.drawing.point(32, 112);
this.groupbox2.name = "groupbox2";
this.groupbox2.size = new system.drawing.size(216, 64);
this.groupbox2.tabindex = 1;
this.groupbox2.tabstop = false;
this.groupbox2.text = "时间设置为";
//
// settime
//
this.settime.format = system.windows.forms.datetimepickerformat.time;
this.settime.location = new system.drawing.point(128, 24);
this.settime.name = "settime";
this.settime.showupdown = true;
this.settime.size = new system.drawing.size(72, 21);
this.settime.tabindex = 1;
this.settime.tabstop = false;
//
// setdate
//
this.setdate.format = system.windows.forms.datetimepickerformat.short;
this.setdate.location = new system.drawing.point(8, 24);
this.setdate.name = "setdate";
this.setdate.size = new system.drawing.size(104, 21);
this.setdate.tabindex = 0;
//
// button1
//
this.button1.location = new system.drawing.point(40, 200);
this.button1.name = "button1";
this.button1.size = new system.drawing.size(64, 32);
this.button1.tabindex = 2;
this.button1.text = "设置";
this.button1.click += new system.eventhandler(this.button1_click);
//
// button2
//
this.button2.location = new system.drawing.point(168, 200);
this.button2.name = "button2";
this.button2.size = new system.drawing.size(64, 32);
this.button2.tabindex = 3;
this.button2.text = "退出";
this.button2.click += new system.eventhandler(this.button2_click);
//
// timer1
//
this.timer1.enabled = true;
this.timer1.synchronizingobject = this;
this.timer1.elapsed += new system.timers.elapsedeventhandler(this.timer1_elapsed);
//
// form1
//
this.autoscalebasesize = new system.drawing.size(6, 14);
this.clientsize = new system.drawing.size(280, 261);
this.controls.add(this.button2);
this.controls.add(this.button1);
this.controls.add(this.groupbox2);
this.controls.add(this.groupbox1);
this.name = "form1";
this.text = "获取和设置系统时间";
this.groupbox1.resumelayout(false);
this.groupbox2.resumelayout(false);
((system.componentmodel.isupportinitialize)(this.timer1)).endinit();
this.resumelayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[stathread]
static void main()
{
application.run(new form1());
}
private void button2_click(object sender, system.eventargs e)
{
this.close(); // 关闭当前窗体
}
private void timer1_elapsed(object sender, system.timers.elapsedeventargs e)
{
// 清除textbox1上的字符串
textbox1.clear();
// 创建systemtime结构体，用于接收系统当前时间
systemtime systemtime = new systemtime();
getlocaltime(ref systemtime); // 获得系统的时间并存在systemtime结构体中
// 将系统的时间从 systemtime 结构体中中取出，并显示在textbox1上
textbox1.text += systemtime.wyear.tostring() +"-";
textbox1.text += systemtime.wmonth.tostring() + "-";
textbox1.text += systemtime.wday.tostring() + " ";
textbox1.text += systemtime.whour.tostring() + ":";
textbox1.text += systemtime.wminute.tostring() + ":";
textbox1.text += systemtime.wsecond.tostring();
// textbox1.refresh();
}
private void button1_click(object sender, system.eventargs e)
{
// 创建systemtime结构体，用于接收用户设置的时间
systemtime systemtime = new systemtime();
// 从setdate,settime控件中获取年，月，日，小时，分钟，秒信息，存入systemtime结构体中
systemtime.wyear = (ushort)setdate.value.year;
systemtime.wmonth = (ushort)setdate.value.month;
systemtime.wday = (ushort)setdate.value.day;
systemtime.whour = (ushort)settime.value.hour;
systemtime.wminute = (ushort)settime.value.minute;
systemtime.wsecond = (ushort)settime.value.second;
// 将系统的时间设置为用户指定的时间
setlocaltime(ref systemtime);
}
}
}
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