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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.PictureBox pictureBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.OpenFileDialog openFileDialog1;
		private System.Windows.Forms.SaveFileDialog saveFileDialog1;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.RadioButton radioButton1;
		private System.Windows.Forms.RadioButton radioButton2;
		private System.Windows.Forms.RadioButton radioButton3;
		private System.Windows.Forms.RadioButton radioButton4;
		private System.Windows.Forms.RadioButton radioButton5;
		private System.Windows.Forms.RadioButton radioButton6;
		/// <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.pictureBox1 = new System.Windows.Forms.PictureBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
			this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.radioButton6 = new System.Windows.Forms.RadioButton();
			this.radioButton5 = new System.Windows.Forms.RadioButton();
			this.radioButton4 = new System.Windows.Forms.RadioButton();
			this.radioButton3 = new System.Windows.Forms.RadioButton();
			this.radioButton2 = new System.Windows.Forms.RadioButton();
			this.radioButton1 = new System.Windows.Forms.RadioButton();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// pictureBox1
			// 
			this.pictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.pictureBox1.Location = new System.Drawing.Point(8, 8);
			this.pictureBox1.Name = "pictureBox1";
			this.pictureBox1.Size = new System.Drawing.Size(280, 222);
			this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
			this.pictureBox1.TabIndex = 0;
			this.pictureBox1.TabStop = false;
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(296, 8);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(96, 23);
			this.button1.TabIndex = 1;
			this.button1.Text = "浏览图像";
			this.button1.Click  = new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(296, 32);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(96, 23);
			this.button2.TabIndex = 2;
			this.button2.Text = "保存图像";
			this.button2.Click  = new System.EventHandler(this.button2_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 (*.*)|*.*";
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.radioButton6);
			this.groupBox1.Controls.Add(this.radioButton5);
			this.groupBox1.Controls.Add(this.radioButton4);
			this.groupBox1.Controls.Add(this.radioButton3);
			this.groupBox1.Controls.Add(this.radioButton2);
			this.groupBox1.Controls.Add(this.radioButton1);
			this.groupBox1.Location = new System.Drawing.Point(296, 64);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(96, 168);
			this.groupBox1.TabIndex = 3;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "图像保存格式";
			// 
			// radioButton6
			// 
			this.radioButton6.Location = new System.Drawing.Point(8, 144);
			this.radioButton6.Name = "radioButton6";
			this.radioButton6.Size = new System.Drawing.Size(72, 16);
			this.radioButton6.TabIndex = 5;
			this.radioButton6.Text = "Wmf格式";
			// 
			// radioButton5
			// 
			this.radioButton5.Location = new System.Drawing.Point(8, 120);
			this.radioButton5.Name = "radioButton5";
			this.radioButton5.Size = new System.Drawing.Size(72, 16);
			this.radioButton5.TabIndex = 4;
			this.radioButton5.Text = "Tiff格式";
			// 
			// radioButton4
			// 
			this.radioButton4.Location = new System.Drawing.Point(8, 96);
			this.radioButton4.Name = "radioButton4";
			this.radioButton4.Size = new System.Drawing.Size(72, 16);
			this.radioButton4.TabIndex = 3;
			this.radioButton4.Text = "Png格式";
			// 
			// radioButton3
			// 
			this.radioButton3.Location = new System.Drawing.Point(8, 72);
			this.radioButton3.Name = "radioButton3";
			this.radioButton3.Size = new System.Drawing.Size(72, 16);
			this.radioButton3.TabIndex = 2;
			this.radioButton3.Text = "Jpeg格式";
			// 
			// radioButton2
			// 
			this.radioButton2.Checked = true;
			this.radioButton2.Location = new System.Drawing.Point(8, 48);
			this.radioButton2.Name = "radioButton2";
			this.radioButton2.Size = new System.Drawing.Size(72, 16);
			this.radioButton2.TabIndex = 1;
			this.radioButton2.TabStop = true;
			this.radioButton2.Text = "Gif格式";
			// 
			// radioButton1
			// 
			this.radioButton1.Location = new System.Drawing.Point(8, 24);
			this.radioButton1.Name = "radioButton1";
			this.radioButton1.Size = new System.Drawing.Size(72, 16);
			this.radioButton1.TabIndex = 0;
			this.radioButton1.Text = "Bmp格式";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(400, 238);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.pictureBox1);
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "演示图像文件格式转换";
			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 button1_Click(object sender, System.EventArgs e)
		{//打开图像文件并显示
			this.openFileDialog1.ShowDialog();
			if(this.openFileDialog1.FileName.Trim()=="")
				return;
			try
			{
				this.pictureBox1.Image=System.Drawing.Bitmap.FromFile(this.openFileDialog1.FileName);
			}
			catch(Exception Err)
			{
				MessageBox.Show(this,"打开图像文件错误！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}

		}

		private void button2_Click(object sender, System.EventArgs e)
		{//转换图像文件格式
			this.saveFileDialog1.ShowDialog();
			System.String StrFileName=this.saveFileDialog1.FileName;
			if(StrFileName.Trim()=="")
				return;
			try
			{			
				if(this.radioButton1.Checked)
				{
					this.pictureBox1.Image.Save(StrFileName ".bmp",System.Drawing.Imaging.ImageFormat.Bmp);			
				}
				if(this.radioButton2.Checked)
				{
					this.pictureBox1.Image.Save(StrFileName ".gif",System.Drawing.Imaging.ImageFormat.Gif);			
				}
				if(this.radioButton3.Checked)
				{
					this.pictureBox1.Image.Save(StrFileName ".jpg",System.Drawing.Imaging.ImageFormat.Jpeg);			
				}
				if(this.radioButton4.Checked)
				{
					this.pictureBox1.Image.Save(StrFileName ".png",System.Drawing.Imaging.ImageFormat.Png);			
				}
				if(this.radioButton5.Checked)
				{
					this.pictureBox1.Image.Save(StrFileName ".tif",System.Drawing.Imaging.ImageFormat.Tiff);			
				}
				if(this.radioButton6.Checked)
				{
					this.pictureBox1.Image.Save(StrFileName ".wmf",System.Drawing.Imaging.ImageFormat.Wmf);			
				}		
			}
			catch(Exception Error)
			{
				MessageBox.Show(this,"保存图像文件时发生错误！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
		}
	}
}