Computer Programming : How to get height and width of an image in ASP.NET

December 23, 2013 0 Comments

If you want to get uploaded image height and width then you should go for Bitmap class. Suppose I have an image, and I want to get height and width parameter of it. Lets take an simple example

How to get height and width of an image in ASP.NET

You have an image with height and width parameter. You can see in above snap, which is contains 578pixel in wide and 141pixel in height. Now, you want get that these pixel at runtime in ASP.NET.
A Bitmap class is used for getting Height and Width of image.
Encapsulates a GDI+ bitmap, which consists of the pixel data for a graphics image and its attributes. A Bitmap is an object used to work with images defined by pixel data. according to msdn library.

    Simple example

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<!DOCTYPE html>

<html xmlns="">
<head runat="server">
    <form id="form1" runat="server">
        <asp:FileUpload ID="FileUpload1" runat="server" />
        <br />
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
        <br />
        <br />
        <asp:Label ID="Label1" runat="server"></asp:Label><br />
         <asp:Label ID="Label2" runat="server"></asp:Label><br />

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default2 : System.Web.UI.Page
    protected void Page_Load(object sender, EventArgs e)

    protected void Button1_Click(object sender, EventArgs e)

        using (Bitmap bi = new Bitmap(Server.MapPath("~/img/"+FileUpload1 .FileName), true))
                Label1.Text = Convert.ToString(bi.Height);
                Label2.Text = Convert.ToString(bi.Width);


Output of the code

How to get height and width of an image in ASP.NET

Jacob Lefore

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