使用C#制作的更换桌面背景程序

看见上面的图了吗?我来主要说说那个两个button,

首先叫到的是选择按钮代码如下:

private void button1_click(object sender, system.eventargs e)
  {
   openfiledialog1.initialdirectory = @"c:/";
   if (openfiledialog1.showdialog() == dialogresult.ok)
   {
    textbox1.text = openfiledialog1.filename;
    string[] stra=textbox1.text.split('.');
    bitmap bm=new bitmap(textbox1.text);
    if(stra[1]!="bmp")
    {
     filepath=stra[0]+".bmp";
     bm.save(filepath);
    }
    else
     filepath=textbox1.text;
    this.picturebox1.image=bm;
   }
正如你看到的,那样,由于只能将bmp图象设置成桌面所以必须要转化一下,上面是我的方法

也许你还有更好的,那就说说吧.

然后是更换按钮,代码如下:

private void button2_click(object sender, system.eventargs e)
  {
   int nresult ;
   if (file.exists(filepath))
   {
    nresult = systemparametersinfo(20, 1, filepath,  0x1 | 0x2 );
    if(nresult==0)
     messagebox.show("没有更新成功!");
    else
    messagebox.show("正在更换背景图片...");
   }
   else
    messagebox.show("文件不存在!");

  }
这个实现起来在简单不过了,仅仅是调用刚才上面讲到的api就可以了.

好了,我把全部代码都给你,很简单,如下:

 using system;
using system.drawing;
using system.collections;
using system.componentmodel;
using system.windows.forms;
using system.data;
using system.runtime.interopservices;
using system.io;
namespace desktopwalk
{
 /// <summary>
 /// form1 的摘要说明。
 /// </summary>
 public class form1 : system.windows.forms.form
 {
  private system.windows.forms.button button1;
  private system.windows.forms.button button2;
  private system.windows.forms.textbox textbox1;
  private system.windows.forms.groupbox groupbox1;
  private system.windows.forms.groupbox groupbox2;
  private system.windows.forms.label label1;
  private system.windows.forms.picturebox picturebox1;
  private system.windows.forms.label label2;
  private system.windows.forms.openfiledialog openfiledialog1;
  private string filepath;
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private system.componentmodel.container components = null;
  [dllimport("user32.dll", charset=charset.auto)]
  public static  extern int systemparametersinfo (int uaction , int uparam , string lpvparam , int fuwinini) ;

  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 form designer generated code
  /// <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.button1 = new system.windows.forms.button();
   this.button2 = new system.windows.forms.button();
   this.textbox1 = new system.windows.forms.textbox();
   this.groupbox1 = new system.windows.forms.groupbox();
   this.label2 = new system.windows.forms.label();
   this.picturebox1 = new system.windows.forms.picturebox();
   this.label1 = new system.windows.forms.label();
   this.groupbox2 = new system.windows.forms.groupbox();
   this.openfiledialog1 = new system.windows.forms.openfiledialog();
   this.groupbox1.suspendlayout();
   this.suspendlayout();
   //
   // button1
   //
   this.button1.location = new system.drawing.point(312, 62);
   this.button1.name = "button1";
   this.button1.tabindex = 0;
   this.button1.text = "选择背景";
   this.button1.click += new system.eventhandler(this.button1_click);
   //
   // button2
   //
   this.button2.location = new system.drawing.point(312, 120);
   this.button2.name = "button2";
   this.button2.tabindex = 1;
   this.button2.text = "更换背景";
   this.button2.click += new system.eventhandler(this.button2_click);
   //
   // textbox1
   //
   this.textbox1.location = new system.drawing.point(16, 64);
   this.textbox1.name = "textbox1";
   this.textbox1.size = new system.drawing.size(272, 21);
   this.textbox1.tabindex = 2;
   this.textbox1.text = "";
   //
   // groupbox1
   //
   this.groupbox1.controls.addrange(new system.windows.forms.control[] {
                     this.label2,
                     this.picturebox1,
                     this.label1,
                     this.groupbox2,
                     this.button1,
                     this.button2,
                     this.textbox1});
   this.groupbox1.location = new system.drawing.point(16, 16);
   this.groupbox1.name = "groupbox1";
   this.groupbox1.size = new system.drawing.size(392, 240);
   this.groupbox1.tabindex = 3;
   this.groupbox1.tabstop = false;
   this.groupbox1.text = "更换背景图片";
   //
   // label2
   //
   this.label2.location = new system.drawing.point(8, 128);
   this.label2.name = "label2";
   this.label2.size = new system.drawing.size(72, 23);
   this.label2.tabindex = 6;
   this.label2.text = "预览图片:";
   //
   // picturebox1
   //
   this.picturebox1.location = new system.drawing.point(104, 120);
   this.picturebox1.name = "picturebox1";
   this.picturebox1.size = new system.drawing.size(184, 104);
   this.picturebox1.sizemode = system.windows.forms.pictureboxsizemode.stretchimage;
   this.picturebox1.tabindex = 5;
   this.picturebox1.tabstop = false;
   //
   // label1
   //
   this.label1.location = new system.drawing.point(24, 24);
   this.label1.name = "label1";
   this.label1.size = new system.drawing.size(64, 23);
   this.label1.tabindex = 4;
   this.label1.text = "背景图片:";
   //
   // groupbox2
   //
   this.groupbox2.location = new system.drawing.point(8, 104);
   this.groupbox2.name = "groupbox2";
   this.groupbox2.size = new system.drawing.size(376, 8);
   this.groupbox2.tabindex = 3;
   this.groupbox2.tabstop = false;
   //
   // form1
   //
   this.autoscalebasesize = new system.drawing.size(6, 14);
   this.clientsize = new system.drawing.size(432, 269);
   this.controls.addrange(new system.windows.forms.control[] {
                    this.groupbox1});
   this.maximizebox = false;
   this.name = "form1";
   this.startposition = system.windows.forms.formstartposition.centerparent;
   this.text = "设置背景";
   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());
  }

  private void button2_click(object sender, system.eventargs e)
  {
   int nresult ;
   if (file.exists(filepath))
   {
    nresult = systemparametersinfo(20, 1, filepath,  0x1 | 0x2 );
    if(nresult==0)
     messagebox.show("没有更新成功!");
    else
    messagebox.show("正在更换背景图片...");
   }
   else
    messagebox.show("文件不存在!");

  }

  private void button1_click(object sender, system.eventargs e)
  {
   openfiledialog1.initialdirectory = @"c:/";
   if (openfiledialog1.showdialog() == dialogresult.ok)
   {
    textbox1.text = openfiledialog1.filename;
    string[] stra=textbox1.text.split('.');
    bitmap bm=new bitmap(textbox1.text);
    if(stra[1]!="bmp")
    {
     filepath=stra[0]+".bmp";
     bm.save(filepath);
    }
    else
     filepath=textbox1.text;
    this.picturebox1.image=bm;
   }

  }
 }
}