如何把存储在数据库中的图片根据自己的需要的大小显示出来

领测软件测试网      文件1：showimage.ASPx.cs
  
  
  namespace ImageResizing {
  
  public class MainDisplay : System.Web.UI.Page {
  
  public void Page_Load(System.Object sender, System.EventArgs e) {
  
  try {
  
  System.Int32 _ImgID = System.Convert.ToInt32(Request.QueryString["ImgID"]);
  
  System.Int32 _height = System.Convert.ToInt32(Request.QueryString["height"]);
  
  System.Int32 _width = System.Convert.ToInt32(Request.QueryString["width"]);
  
  System.Data.SqlClient.SqlConnection Con = new System.Data.SqlClient.SqlConnection( "server=localhost;database=northwind;trusted_connection=true" );
  
  System.String SqlCmd = "SELECT * FROM Images WHERE ImageID = @ImageID";
  
  System.Data.SqlClient.SqlCommand SqlCmdObj = new System.Data.SqlClient.SqlCommand( SqlCmd, Con );
  
  SqlCmdObj.Parameters.Add("@ImageID", System.Data.SqlDbType.Int).Value = _ImgID;
  
  Con.Open();
  
  System.Data.SqlClient.SqlDataReader SqlReader = SqlCmdObj.ExecuteReader();
  
  SqlReader.Read();
  
  System.Web.HttpContext.Current.Response.ContentType = "image/pjpeg";
  
  System.Drawing.Image _image = System.Drawing.Image.FromStream( new System.IO.MemoryStream( (byte[])SqlReader["Image"] ) );
  
  System.Drawing.Image _newimage = _image.GetThumbnailImage( _width, _height, null, new System.IntPtr());
  
  _newimage.Save( System.Web.HttpContext.Current.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg );
  
  } catch (System.Exception Ex) {
  
  System.Web.HttpContext.Current.Trace.Write(Ex.Message.ToString());
  
  }
  
  }
  
  }
  
  }
  
  
  文件2：显示图片之用，把querystring传入
  <html>
  <body>
  
  <img src="showimage.aspx?ImgID=202&height=150&width=150">
  </body>
  </html>
  
  
  相关链接：http://www.aspnextgen.com/tutorials.aspx?tutorialid=176
  
  
  
  

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