in asp.net to show the retrived image in image control...

You have three ways to do that the first one is to add "drag and drop" an image control from the tool box and parameterise it as follow, say that the csharpcorner logo is the target:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>





   


   

   

               
        runat="server" Height="131px" Width="252px"
            ImageUrl="http://www.c-sharpcorner.com/Forums/App_Themes/CSharp/Images/ForumLogo.gif" />
   

   

You can for example create a css(style sheet) file within which you precise the image characterstics and the add a link to this style sheet link to your asp page in the head,and the fix the cssClass attribute of your image control to the name of your css file

at last but not least you can do this programmatically

  public partial class _Default : System.Web.UI.Page
    {
        Image myImage;
        protected void Page_Load(object sender, EventArgs e)
        {
             myImage = new Image();
             myImage.Width = 200;
             myImage.Height = 200;
             myImage.ImageUrl = "http://www.c-sharpcorner.com/Forums/App_Themes/CSharp/Images/ForumLogo.gif";
             myImage.Visible = true;
             this.Controls.Add(myImage);
        }
    }