Hi
try this example:
<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”GDI-UploadImage.aspx.cs” Inherits=”GDI_UploadImage” %>
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01//EN” http://www.w3.org/TR/html4/strict.dtd“>
<html lang=”en-GB”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=iso-8859-1″>
<title>ASP.NET 2.0 [GDI+ Upload Image Example]</title>
</head>
<body>
<form id=”form2″ runat=”server”>
<asp:FileUpload ID=”fileUpload” runat=”server” />
<asp:Button ID=”uploadButton” runat=”server” Text=”Upload!” OnClick=”UploadFile” />
<asp:Label ID=”label” runat=”server”></asp:Label>
<asp:Image ID=”Image1″ ImageUrl=”" runat=”server” />
</form>
</body>
</html>
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO; // this is for the file upload
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
public partial class ResizeImage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void UploadFile(Object s, EventArgs e)
{
if (fileUpload.HasFile)
{
// Find the fileUpload control
string filename = Guid.NewGuid().ToString() + Path.GetExtension(fileUpload.FileName);
// Specify a upload directory
string directory = Server.MapPath(“~/Upload/”);
// Create a bitmap in memory of the content of the fileUpload control
Bitmap originalBMP = new Bitmap(fileUpload.FileContent);
// Calculate the new image dimensions
int origWidth = originalBMP.Width;
int origHeight = originalBMP.Height;
int sngRatio = origWidth / origHeight;
int newWidth = 100;
//int newHeight = newWidth / sngRatio;
int newHeight = 100;
// Check Hieht and width of image
if (origWidth <= 100 && origHeight <= 100)
{
fileUpload.SaveAs(directory + filename);
// Write a message to inform the user all is OK
label.Text = “File <b style=’color: red;’>” + filename + “</b> uploaded.”;
// Display the image to the user
Image1.ImageUrl = “~/Upload/” + filename;
}
else
{
// Create a new bitmap which will hold the previous resized bitmap
Bitmap newBMP = new Bitmap(originalBMP, newWidth, newHeight);
// Create a graphic based on the new bitmap
Graphics oGraphics = Graphics.FromImage(newBMP);
// Set the properties for the new graphic file
oGraphics.SmoothingMode = SmoothingMode.AntiAlias;
oGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
// Draw the new graphic based on the resized bitmap
oGraphics.DrawImage(originalBMP, 0, 0, newWidth, newHeight);
// Save the new graphic file to the server
newBMP.Save(directory + “tn_” + filename);
// Once finished with the bitmap objects, we deallocate them.
originalBMP = null;
newBMP = null;
oGraphics = null;
// Write a message to inform the user all is OK
label.Text = “File <b style=’color: red;’>” + filename + “</b> uploaded.”;
// Display the image to the user
Image1.ImageUrl = “~/Upload/tn_” + filename;
}
}
else
{
label.Text = “No file uploaded!”;
}
}
}
Good Luck
