Visual C#是微软公司推出的新一代程序开发语言，是微软.Net框架中的一个重要组成部分。屏幕保护程序是以scr为扩展名的标准Windows可执行程序。屏幕保护程序不仅可以延长显示器的使用寿命，还可以保护私人信息。本文向大家介绍一个.Net平台上用C#编写的一个动态文本及图形的屏幕保护程序。
一、具体实现步骤：
（本文来源于图老师网站，更多请访问http://m.tulaoshi.com/bianchengyuyan/）（1）在Visual Studio.Net下新建一个C＃的Windows应用程序工程，不妨命名为screen_saver。
（本文来源于图老师网站，更多请访问http://m.tulaoshi.com/bianchengyuyan/）（2）现在我们来设计程序的主界面：
先将窗体的Name属性设置为screen、Text属性设置为空，BackColor属性设置为Black、Size属性设置为(800, 600)、 ControlBox、MaximizeBox、MinimizeBox、ShowInTaskbar属性设置均为false、FormBorderStyle属性设置为None。再往窗体上添加Label控件、PictureBox控件、Timer控件各一个。将Label控件的Name设置为word、Text属性设置为空；将PictureBox控件的Name设置为picture1、Image设置为一个预知图片；将Timer控件的Name设置为timerSaver、Enabled 属性设为true、Interval属性设为5。
（3）现在我们开始编写完整程序代码部分：
//导入使用到的名称空间using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;file:// namespace screen_saver {////// Form1 的摘要说明。///public class screen : System.Windows.Forms.Form{ file://加入私有成员变量 private System.ComponentModel.IContainer components; private int iSpeed = 2; private string str="福建南纺股份公司计算机中心"; file://定义文本字体及大小 private System.Drawing.Font TextStringFont = new System.Drawing.Font ("宋体, 10,System.Drawing.FontStyle.Bold); private Color TextStringcolor =System.Drawing.Color.Yellow; file://文本字体颜色 private int iDistance; private int ixStart= 0; private int iyStart= 0; private int speed; private int x1,y1; int width1,height1; private System.Windows.Forms.Timer timerSaver; file://计时器控件 private System.Windows.Forms.PictureBox picture1; file://图形控件 private System.Windows.Forms.Label word; file://文本显示控件////// 必需的设计器变量。/// public screen() { file:// // Windows 窗体设计器支持所必需的 file:// InitializeComponent(); word.Font=TextStringFont; word.ForeColor=TextStringcolor; System.Windows.Forms.Cursor.Hide(); file://隐藏光标 file:// // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 file:// } /// /// 清理所有正在使用的资源。 /// protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// /// 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。 /// private void InitializeComponent() file://初始化程序中使用到的组件 { this.components = new System.ComponentModel.Container(); System.Resources.ResourceManager resources = new system.Resources.ResourceManger(typeof(screen)); this.word = new System.Windows.Forms.Label(); this.timerSaver = new System.Windows.Forms.Timer(this.components); this.picture1 = new System.Windows.Forms.PictureBox(); this.SuspendLayout(); // // 设置文本显示控件(word)属性 this.word.ForeColor = System.Drawing.Color.Yellow; this.word.Location = new System.Drawing.Point(624, 8); this.word.Name = "word"; this.word.Size = new System.Drawing.Size(168, 16); this.word.TabIndex = 0; this.word.Visible = false; // // 设置计时器控件(timerSaver)属性 this.timerSaver.Enabled = true; this.timerSaver.Interval = 5; this.timerSaver.Tick += new System.EventHandler(this.timerSaver_Tick); // // 设置图片控件(picture1)属性 this.picture1.Image = ((System.Drawing.Bitmap)(resources.GetObject("picture1.Image"))); this.picture1.Location = new System.Drawing.Point(800, 600); this.picture1.Name = "picture1"; this.picture1.Size = new System.Drawing.Size(304, 224); this.picture1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage; this.picture1.TabIndex = 1; this.picture1.TabStop = false; // // 设置窗体(screen)属性 this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.BackColor = System.Drawing.Color.Black; this.ClientSize = new System.Drawing.Size(800, 600); this.ControlBox = false; this.Controls.AddRange(new System.Windows.Forms.Control[] {this.picture1,this.word}); this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; this.KeyPreview = true; this.MaximizeBox = false; this.MinimizeBox = false; this.Name = "screen"; this.ShowInTaskbar = false; this.StartPosition = System.Windows.Forms.FormStartPosition.Manual; this.WindowState = System.Windows.Forms.FormWindowState.Maximized; file://键盘按下响应事件 this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.screen_KeyDown); file://鼠标按下响应事件 this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.screen_MouseDown); file://窗体启动调用事件 this.Load += new System.EventHandler(this.Form1_Load); file://鼠标移动响应事件 this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.screen_MouseMove); this.ResumeLayout(false); } #endregion /// /// 应用程序的主入口点。 /// [STAThread] static void Main(string[] args) { if(args.Length==1) if(args[0].Substring(0,2).Equals("/c")) { MessageBox.Show("没有设置项功能","C# Screen Saver"); Application.Exit(); } else if(args[0]=="/s") Application.Run(new screen()); else if(args[0]=="/a") { MessageBox.Show("没有口令功能","C# Screen saver"); Application.Exit(); } else Application.Run(new screen()); } private void Form1_Load(object sender, System.EventArgs e) { speed=0; System.Drawing.Rectangle ssWorkArea=System.Windows.Forms.Screen.GetWorkingArea(this); file://屏幕显示区域 width1=ssWorkArea.Width; file://屏幕宽度 height1=ssWorkArea.Height; file://屏幕高度 } private void timerSaver_Tick(object sender, System.EventArgs e) file://计时器响应事件 { word.Visible=true; word.Text=str; word.Height=word.Font.Height; file://设置文本的高度 word.Width=word.Text.Length*(int)word.Font.Size*2; file://设置文本的宽度 PlayScreenSaver(); } private void PlayScreenSaver() file://自定义函数 { file://下面设置文本显示框的位置坐标 word.Location =new System.Drawing.Point(width1-iDistance,word.Location.Y); word.Visible=true; file://设置为可见 iDistance+=iSpeed; if(word.Location.X=-(word.Width)) { iDistance=0; if(word.Location.Y==0) word.Location=new System.Drawing.Point(word.Location.X,height1/2); else if(word.Location.Y==height1/2) word.Location=new System.Drawing.Point(word.Location.X,height1-word.Height); else word.Location=new System.Drawing.Point(word.Location.X,0); } file://下面是计算图片框移动坐标 speed++; if(speed=2*height1) { x1=System.Math.Abs(width1-speed); y1=System.Math.Abs(height1-speed); } else if(speed2*height1 && speed=2*width1) { x1=System.Math.Abs(width1-speed); y1=System.Math.Abs(height1-(speed-speed/height1*height1)); } else if(speed2*width1 &&speed=3*height1) { x1=System.Math.Abs(width1-(speed-speed/width1*width1)); y1=System.Math.Abs(height1-(speed-speed/height1*height1)); } else if(speed3*height1 && speed4*height1) { x1=System.Math.Abs(width1-(speed-speed/width1*width1)); y1=System.Math.Abs(speed-speed/height1*height1); } else if(speed=4*height1 && speed5*height1) { x1=System.Math.Abs(speed-speed/width1*width1); y1=System.Math.Abs(height1-(speed-speed/height1*height1)); } else if(speed=5*height1 && speed4*width1) { x1=System.Math.Abs(speed-speed/width1*width1); y1=System.Math.Abs(speed-speed/height1*height1); } else if(speed=4*width1 && speed6*height1) { x1=System.Math.Abs(width1-(speed-speed/width1*width1)); y1=System.Math.Abs(speed-speed/height1*height1); } else if(speed=6*height1 && speed5*width1) { x1=System.Math.Abs(width1-(speed-speed/width1*width1)); y1=System.Math.Abs(height1-(speed-speed/height1*height1)); } else if(speed=5*width1 && speed7*height1) { x1=System.Math.Abs(speed-speed/width1*width1); y1=System.Math.Abs(height1-(speed-speed/height1*height1)); } else if(speed=7*height1 && speed6*width1) { x1=System.Math.Abs(speed-speed/width1*width1); y1=System.Math.Abs(speed-speed/height1*height1); } if(speed==6*width1) speed=0; picture1.Location=new System.Drawing.Point(x1,y1); } private void StopScreenSaver() file://停止屏幕保护程序运行 { System.Windows.Forms.Cursor.Show(); timerSaver.Enabled=false; Application.Exit(); } private void screen_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e) file://鼠标移动事件 { if(ixStart==0 && iyStart==0) { ixStart=e.X; iyStart=e.Y; return; } else if(e.X!=ixStart||e.Y!=iyStart) StopScreenSaver(); } private void screen_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) file://鼠标按下事件 { StopScreenSaver(); file://停止运行屏幕保护程序 } private void screen_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) file://键盘按下事件 { StopScreenSaver(); file://停止运行屏幕保护程序 }}}最后运行该程序，把screen_saver.exe改为screen_saver.scr，拷入Windows系统目录中，这样就可以运行该屏幕保护程序。
