|zyciis| 如何直接输出一张图片

Question

                    context.Response.Clear();
                   ????? //这里怎么写输入  ~/Images/Logo.jpg
                    context.Response.ContentType = "image/jpeg";
                    context.Response.Flush();
                    context.Response.End();

Answer 1

先 序列化为 byte[] 然后 输出
  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 strImageID = Request.QueryString["id"];
   SqlConnection myConnection = new SqlConnection("Data Source=.;Initial Catalog=mxh;User Id=sa;Password=;");
   SqlCommand myCommand = new SqlCommand("Select PersonImageType, PersonImage from Person Where PersonID=" 
    + strImageID, myConnection);   try
   {
    myConnection.Open();
    SqlDataReader myDataReader;
    myDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
    if(myDataReader.Read())
    {
     Response.Clear();     Response.ContentType = myDataReader["PersonImageType"].ToString();
     Response.BinaryWrite((byte[])myDataReader["PersonImage"]);
    }
    myConnection.Close();
   }
   catch (SqlException SQLexc)
   {
   }
   Response.End();

Answer 2

Image valicodebg = Image.FromFile(你的图片的物理路径);
            Bitmap bitmap = new Bitmap(valicodebg,100, 40);
System.IO.MemoryStream memorystream=new System.IO.MemoryStream (6);
            bitmap.Save(memorystream,ImageFormat.Jpeg);
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.ContentType="image/jpeg";
            HttpContext.Current.Response.BinaryWrite(memorystream.ToArray());

Answer 3

            System.Drawing.Image img = System.Drawing.Image.FromFile(context.Server.MapPath("~/Images/Logo.jpg"));
            img.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);