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   源码介绍

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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace Date
{
	/// <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.Label label1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.DateTimePicker dateTimePicker1;
		private System.Windows.Forms.DateTimePicker dateTimePicker2;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		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.dateTimePicker2 = new System.Windows.Forms.DateTimePicker();
			this.dateTimePicker1 = new System.Windows.Forms.DateTimePicker();
			this.label4 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.button2 = new System.Windows.Forms.Button();
			this.label2 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.dateTimePicker2);
			this.groupBox1.Controls.Add(this.dateTimePicker1);
			this.groupBox1.Controls.Add(this.label4);
			this.groupBox1.Controls.Add(this.label3);
			this.groupBox1.Controls.Add(this.button2);
			this.groupBox1.Controls.Add(this.label2);
			this.groupBox1.Controls.Add(this.textBox1);
			this.groupBox1.Controls.Add(this.button1);
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.Location = new System.Drawing.Point(16, 16);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(328, 128);
			this.groupBox1.TabIndex = 0;
			this.groupBox1.TabStop = false;
			// 
			// dateTimePicker2
			// 
			this.dateTimePicker2.Format = System.Windows.Forms.DateTimePickerFormat.Time;
			this.dateTimePicker2.Location = new System.Drawing.Point(208, 88);
			this.dateTimePicker2.Name = "dateTimePicker2";
			this.dateTimePicker2.ShowUpDown = true;
			this.dateTimePicker2.Size = new System.Drawing.Size(104, 21);
			this.dateTimePicker2.TabIndex = 10;
			// 
			// dateTimePicker1
			// 
			this.dateTimePicker1.Location = new System.Drawing.Point(56, 88);
			this.dateTimePicker1.Name = "dateTimePicker1";
			this.dateTimePicker1.Size = new System.Drawing.Size(112, 21);
			this.dateTimePicker1.TabIndex = 9;
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(168, 96);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(48, 16);
			this.label4.TabIndex = 8;
			this.label4.Text = "时间：";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(16, 96);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(48, 16);
			this.label3.TabIndex = 7;
			this.label3.Text = "日期：";
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(168, 64);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(144, 23);
			this.button2.TabIndex = 4;
			this.button2.Text = "设置系统新日期时间";
			this.button2.Click  = new System.EventHandler(this.button2_Click);
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 72);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(120, 16);
			this.label2.TabIndex = 3;
			this.label2.Text = "系统新日期时间：";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(16, 40);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(296, 21);
			this.textBox1.TabIndex = 2;
			this.textBox1.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(168, 16);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(144, 23);
			this.button1.TabIndex = 1;
			this.button1.Text = "获取系统当前日期时间";
			this.button1.Click  = new System.EventHandler(this.button1_Click);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 20);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(120, 16);
			this.label1.TabIndex = 0;
			this.label1.Text = "系统当前日期时间：";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(360, 166);
			this.Controls.Add(this.groupBox1);
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "演示获取和设置系统日期时间";
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}
		public class LibWrapDateTime
		{
			[DllImportAttribute( "Kernel32.dll" )]
			public static extern void GetLocalTime(SystemTime st );
			[DllImportAttribute( "Kernel32.dll" )]
			public static extern void SetLocalTime(SystemTime st );
		}
		[StructLayoutAttribute( LayoutKind.Sequential)]
		public class SystemTime 
		{
			public ushort wYear; 
			public ushort wMonth; 
			public ushort wDayOfWeek; 
			public ushort wDay; 
			public ushort wHour; 
			public ushort wMinute; 
			public ushort wSecond; 
			public ushort wMilliseconds; 
		}
		private void button1_Click(object sender, System.EventArgs e)
		{//获取当前系统日期时间			
		  DateTimePicker OlddateTimePicker = new DateTimePicker();		  
		  this.textBox1.Text=OlddateTimePicker.Value.ToLongDateString().ToString();
          this.textBox1.Text =OlddateTimePicker.Value.ToLongTimeString().ToString();		
		 }

		private void button2_Click(object sender, System.EventArgs e)
		{//设置系统当前日期时间
			if(MessageBox.Show("您真的确定更改系统当前日期时间吗？","信息提示",MessageBoxButtons.OK)==DialogResult.OK)
			{
				DateTime Year=this.dateTimePicker1.Value;
				SystemTime MySystemTime = new SystemTime();
				LibWrapDateTime.GetLocalTime(MySystemTime);
				MySystemTime.wYear=(ushort)this.dateTimePicker1.Value.Year;
				MySystemTime.wMonth=(ushort)this.dateTimePicker1.Value.Month;
				MySystemTime.wDay=(ushort)this.dateTimePicker1.Value.Day;
				MySystemTime.wHour=(ushort)this.dateTimePicker2.Value.Hour;
				MySystemTime.wMinute=(ushort)this.dateTimePicker2.Value.Minute;
				MySystemTime.wSecond=(ushort)this.dateTimePicker2.Value.Second;
				LibWrapDateTime.SetLocalTime(MySystemTime);
				button1_Click(null,null);
			}
		}
	}
}