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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;

namespace Image
{
	/// <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.OpenFileDialog openFileDialog1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Button button3;
		private System.Windows.Forms.Button button4;
		private System.Windows.Forms.Button button5;
        private System.String  StrFileName="";
		private System.Int32 iFlag=1;
		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.button1 = new System.Windows.Forms.Button();
			this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
			this.button2 = new System.Windows.Forms.Button();
			this.button3 = new System.Windows.Forms.Button();
			this.button4 = new System.Windows.Forms.Button();
			this.button5 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(8, 208);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(80, 23);
			this.button1.TabIndex = 0;
			this.button1.Text = "浏览图像";
			this.button1.Click  = new System.EventHandler(this.button1_Click);
			// 
			// openFileDialog1
			// 
			this.openFileDialog1.Filter = "Image files (JPeg, Gif, Bmp, etc.)|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png|"  
				" JPeg files (*.jpg;*.jpeg)|*.jpg;*.jpeg |GIF files (*.gif)|*.gif |BMP files (*.b"  
				"mp)|*.bmp|Tiff files (*.tif;*.tiff)|*.tif;*.tiff|Png files (*.png)| *.png |All f"  
				"iles (*.*)|*.*";
			// 
			// button2
			// 
			this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
			this.button2.Location = new System.Drawing.Point(8, 8);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(320, 192);
			this.button2.TabIndex = 1;
			this.button2.Paint  = new System.Windows.Forms.PaintEventHandler(this.button2_Paint);
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(88, 208);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(88, 23);
			this.button3.TabIndex = 2;
			this.button3.Text = "垂直显示文字";
			this.button3.Click  = new System.EventHandler(this.button3_Click);
			// 
			// button4
			// 
			this.button4.Location = new System.Drawing.Point(176, 208);
			this.button4.Name = "button4";
			this.button4.Size = new System.Drawing.Size(88, 23);
			this.button4.TabIndex = 3;
			this.button4.Text = "水平显示文字";
			this.button4.Click  = new System.EventHandler(this.button4_Click);
			// 
			// button5
			// 
			this.button5.Location = new System.Drawing.Point(264, 208);
			this.button5.Name = "button5";
			this.button5.Size = new System.Drawing.Size(64, 23);
			this.button5.TabIndex = 4;
			this.button5.Text = "显示图像";
			this.button5.Click  = new System.EventHandler(this.button5_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(336, 238);
			this.Controls.Add(this.button5);
			this.Controls.Add(this.button4);
			this.Controls.Add(this.button3);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "演示以图像填充文字";
			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 button1_Click(object sender, System.EventArgs e)
		{//浏览图像
           this.openFileDialog1.ShowDialog();
		   this.StrFileName=this.openFileDialog1.FileName;		
		   this.button2.Refresh();
		}
		private void button2_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{//以图像填充文字线条
			if(this.StrFileName.Trim()=="")
				return;
			System.Drawing.Bitmap MyBitmap=new Bitmap(this.StrFileName);
			Graphics g = e.Graphics;
			TextureBrush MyBrush = new TextureBrush(MyBitmap);
			String drawString = "红军不怕远征难，万水千山只等闲。五岭逶迤腾细浪，乌蒙磅礴走泥丸。金沙水拍云崖暖，大渡桥横铁索寒。更喜岷山千里雪，三军过后尽开颜。";
			switch(this.iFlag)
			{
				case 1://以显示垂直文字
					Font drawFont = new Font("Arial", 15,FontStyle.Underline);
					StringFormat drawFormat = new StringFormat();
					Rectangle MyRect=new Rectangle(10,10,this.button2.Width,this.button2.Height);
					drawFormat.FormatFlags = StringFormatFlags.DirectionVertical|StringFormatFlags.FitBlackBox;					
					g.DrawString(drawString, drawFont, MyBrush, MyRect, drawFormat);
					break;
				case 2://以显示水平文字
					drawFont = new Font("Arial", 12);
					drawFormat = new StringFormat();
					MyRect=new Rectangle(10,10,this.button2.Width/2,this.button2.Height);
					drawFormat.FormatFlags = StringFormatFlags.FitBlackBox;					
					g.DrawString(drawString, drawFont, MyBrush, MyRect, drawFormat);	
					break;
				case 3: //以显示原始图像
					g.FillRectangle(MyBrush,this.button2.ClientRectangle);
					break;
			}
			
		}
		private void button3_Click(object sender, System.EventArgs e)
		{//以显示垂直文字
		  this.iFlag=1;
		  this.button2.Refresh();
		}
		private void button4_Click(object sender, System.EventArgs e)
		{//以显示水平文字
			this.iFlag=2;
			this.button2.Refresh();		
		}
		private void button5_Click(object sender, System.EventArgs e)
		{//以显示原始图像
			this.iFlag=3;
			this.button2.Refresh();			
		}
	}
}