Visual C#是微軟公司推出的新一代程序開發語言，是微軟.Net框架中的一個重要組成部分。屏幕保護程序是以scr為擴展名的標准Windows可執行程序。屏幕保護程序不僅可以延長顯示器的使用壽命，還可以保護私人信息。本文向大家介紹一個.Net平台上用C#編寫的一個動態文本及圖形的屏幕保護程序。
一、具體實現步驟：
（1）在Visual Studio.Net下新建一個C＃的Windows應用程序工程，不妨命名為screen_saver。
（2）現在我們來設計程序的主界面：
先將窗體的Name屬性設置為screen、Text屬性設置為空，BackColor屬性設置為Black、Size屬性設置為(800, 600)、 ControlBox、MaximizeBox、MinimizeBox、ShowInTaskbar屬性設置均為false、FormBorderStyle屬性設置為None。再往窗體上添加Label控件、PictureBox控件、Timer控件各一個。將Label控件的Name設置為word、Text屬性設置為空；將PictureBox控件的Name設置為picture1、Image設置為一個預知圖片；將Timer控件的Name設置為timerSaver、Enabled 屬性設為true、Interval屬性設為5。
（3）現在我們開始編寫完整程序代碼部分：
//導入使用到的名稱空間
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
file://
namespace screen_saver
{
///
/// Form1 的摘要說明。
///
public class screen : System.Windows.Forms.Form
{
file://加入私有成員變量
private System.ComponentModel.IContainer components;
private int iSpeed = 2;
private string str="福建南紡股份公司計算機中心";
file://定義文本字體及大小
private System.Drawing.Font TextStringFont = new System.Drawing.Font ("宋體”, 10,System.Drawing.FontStyle.Bold);
private Color TextStringcolor =System.Drawing.Color.Yellow; file://文本字體顏色
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://計時器控件
private System.Windows.Forms.PictureBox picture1; file://圖形控件
private System.Windows.Forms.Label word; file://文本顯示控件
///
/// 必需的設計器變量。
///
public screen()
{
file://
// Windows 窗體設計器支持所必需的
file://
InitializeComponent();
word.Font=TextStringFont;
word.ForeColor=TextStringcolor;
System.Windows.Forms.Cursor.Hide(); file://隱藏光標
file://
// TODO: 在 InitializeComponent 調用後添加任何構造函數代碼
file://
}
///
/// 清理所有正在使用的資源。
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
///
/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內容。
///
private void InitializeComponent() file://初始化程序中使用到的組件
{
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();
//
// 設置文本顯示控件(word)屬性
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;
//
// 設置計時器控件(timerSaver)屬性
this.timerSaver.Enabled = true;
this.timerSaver.Interval = 5;
this.timerSaver.Tick += new System.EventHandler(this.timerSaver_Tick);
//
// 設置圖片控件(picture1)屬性
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;
//
// 設置窗體(screen)屬性
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://鍵盤按下響應事件
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.screen_KeyDown);
file://鼠標按下響應事件
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.screen_MouseDown);
file://窗體啟動調用事件
this.Load += new System.EventHandler(this.Form1_Load);
file://鼠標移動響應事件
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.screen_MouseMove);
this.ResumeLayout(false);
}
#endregion
///
/// 應用程序的主入口點。
///
[STAThread]
static void Main(string[] args)
{
if(args.Length==1)
if(args[0].Substring(0,2).Equals("/c"))
{
MessageBox.Show("沒有設置項功能","C# Screen Saver");
Application.Exit();
}
else if(args[0]=="/s")
Application.Run(new screen());
else if(args[0]=="/a")
{
MessageBox.Show("沒有口令功能","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://屏幕顯示區域
width1=ssWorkArea.Width; file://屏幕寬度
height1=ssWorkArea.Height; file://屏幕高度
}
private void timerSaver_Tick(object sender, System.EventArgs e) file://計時器響應事件
{
word.Visible=true;
word.Text=str;
word.Height=word.Font.Height; file://設置文本的高度
word.Width=word.Text.Length*(int)word.Font.Size*2; file://設置文本的寬度
PlayScreenSaver();
}
private void PlayScreenSaver() file://自定義函數
{
file://下面設置文本顯示框的位置坐標
word.Location =new System.Drawing.Point(width1-iDistance,word.Location.Y);
word.Visible=true; file://設置為可見
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://下面是計算圖片框移動坐標
speed++;
if(speed<=2*height1)
{
x1=System.Math.Abs(width1-speed);
y1=System.Math.Abs(height1-speed);
}
else if(speed>2*height1 && speed<=2*width1)
{
x1=System.Math.Abs(width1-speed);
y1=System.Math.Abs(height1-(speed-speed/height1*height1));
}
else if(speed>2*width1 &&speed<=3*height1)
{
x1=System.Math.Abs(width1-(speed-speed/width1*width1));
y1=System.Math.Abs(height1-(speed-speed/height1*height1));
}
else if(speed>3*height1 && speed<4*height1)
{
x1=System.Math.Abs(width1-(speed-speed/width1*width1));
y1=System.Math.Abs(speed-speed/height1*height1);
}
else if(speed>=4*height1 && speed<5*height1)
{
x1=System.Math.Abs(speed-speed/width1*width1);
y1=System.Math.Abs(height1-(speed-speed/height1*height1));
}
else if(speed>=5*height1 && speed<4*width1)
{
x1=System.Math.Abs(speed-speed/width1*width1);
y1=System.Math.Abs(speed-speed/height1*height1);
}
else if(speed>=4*width1 && speed<6*height1)
{
x1=System.Math.Abs(width1-(speed-speed/width1*width1));
y1=System.Math.Abs(speed-speed/height1*height1);
}
else if(speed>=6*height1 && speed<5*width1)
{
x1=System.Math.Abs(width1-(speed-speed/width1*width1));
y1=System.Math.Abs(height1-(speed-speed/height1*height1));
}
else if(speed>=5*width1 && speed<7*height1)
{
x1=System.Math.Abs(speed-speed/width1*width1);
y1=System.Math.Abs(height1-(speed-speed/height1*height1));
}
else if(speed>=7*height1 && speed<6*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://停止屏幕保護程序運行
{
System.Windows.Forms.Cursor.Show();
timerSaver.Enabled=false;
Application.Exit();
}
private void screen_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
file://鼠標移動事件
{
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://鼠標按下事件
{
StopScreenSaver(); file://停止運行屏幕保護程序
}
private void screen_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
file://鍵盤按下事件
{
StopScreenSaver(); file://停止運行屏幕保護程序
}
}
}最後運行該程序，把screen_saver.exe改為screen_saver.scr，拷入Windows系統目錄中，這樣就可以運行該屏幕保護程序。
