• λ我爱Aspx >> C#.Net >> 如何正确显示数据库中的图片

    • 如何正确显示数据库中的图片

  • :aspxer  Դ:internet  :2007-5-12 7:50:54  ؼ:数据库,数据

  • 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>

    上一篇： 精彩OUTLOOK 2000组件放送

    下一篇： 将你的网站设置为客户的信任站点--WSH方案

    Ҷƪл˵?
  • һƪFilter与updatebatch混合使用实现批量更新
    һƪASP 3.0高级编程（四）