rotate.ascx.cs

用asp.net c#关于网页的图片旋转,放大,缩小.

namespace SkillGather.Webascx
{
	using System;
	using System.Data;
	using System.Drawing;
	using System.Web;
	using System.Web.UI.WebControls;
	using System.Web.UI.HtmlControls;
	using System.Drawing.Imaging;
	using System.Drawing.Drawing2D;

	/// <summary>
	///		Rotate 的摘要说明。
	/// </summary>
	public class Rotate : System.Web.UI.UserControl
	{

		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			string strFilename;
			System.Drawing.Image TImage;

			strFilename=Server.MapPath("./image/00000318_0057_006660.jpg");
			TImage=System.Drawing.Image.FromFile(strFilename);

			Bitmap b=new System.Drawing.Bitmap(TImage.Width,TImage.Height,PixelFormat.Format24bppRgb);
			Graphics g=Graphics.FromImage(b);
			g.Clear(Color.Blue);
			//旋转图片
			TImage.RotateFlip(System.Drawing.RotateFlipType.Rotate90FlipX);
			g.DrawImage(TImage,new Point(0,0));
			TImage.RotateFlip(System.Drawing.RotateFlipType.Rotate270FlipY);
			
			g.RotateTransform(10);
			g.DrawImage(TImage,new Point(0,0));
			g.RotateTransform(10);
			g.DrawImage(TImage,new Point(20,20));
			g.RotateTransform(10);
			g.DrawImage(TImage,new Point(40,40));
			g.RotateTransform(10);
			g.DrawImage(TImage,new Point(40,40));
			g.RotateTransform(-40);
			g.RotateTransform(90);
			g.DrawImage(TImage,new Rectangle(100,-360,100,50),new Rectangle(20,20,TImage.Width-20,TImage.Height -20),GraphicsUnit.Pixel);
			g.RotateTransform(-90);

			//拉伸图片
			g.DrawImage(TImage,new Rectangle(10,10,50,50),new Rectangle(20,20,TImage.Width -20,TImage.Height-20),GraphicsUnit.Pixel);
			g.DrawImage(TImage,new Rectangle(50,10,90,50),new Rectangle(20,20,TImage.Width -20,TImage.Height-20),GraphicsUnit.Pixel);
			g.DrawImage(TImage,new Rectangle(110,10,150,50),new Rectangle(20,20,TImage.Width -20,TImage.Height-20),GraphicsUnit.Pixel);

			//切割图片
			g.DrawImage(TImage,50,100,new Rectangle(180,80,60,110),GraphicsUnit.Pixel);
			g.DrawImage(TImage,140,100,new Rectangle(180,80,60,110),GraphicsUnit.Pixel);

			//旋转图片
			TImage.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipX);
			g.DrawImage(TImage,230,100,new Rectangle(180,110,60,110),GraphicsUnit.Pixel);

//			g.DrawImage(TImage,0,0,new Rectangle(0,0,400,400),GraphicsUnit.Pixel);

			Response.ContentType="image/jpeg";
			b.Save(Response.OutputStream,ImageFormat.Jpeg);
			b.Dispose();
			
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <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.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}