Click here to Skip to main content
Click here to Skip to main content

How to make pictures with rounded corners in ASP.NET

, 14 Sep 2009 CPOL
Rate this:
Please Sign up or sign in to vote.
How to make pictures with rounded corners in ASP.NET.

PicturesWithRoundedCornes

Introduction

In this article, we will learn about how to make pictures with rounded corners in ASP.NET. Here are the steps involved:

  1. Add to your project a webform (for example, PictureViewer.aspx).
  2. In the code-file "PictureViewer.aspx.cs", insert this code:
  3. using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Drawing;
    using System.Drawing.Imaging;
    
    public partial class PictureViewer : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
    
            string Filename = Request.QueryString["Filename"];
            Int32 Radius = Convert.ToInt32(Request.QueryString["Radius"])  ;
            if (!String.IsNullOrEmpty(Filename) &&
                Radius > 0)
            {
                System.Drawing.Bitmap bmp = MakeRoundedCorners(Filename, Radius);
    
                Response.ContentType = "image/Png";
                bmp.Save(Response.OutputStream, ImageFormat.Png);
            }
           
        }
    
        private Bitmap MakeRoundedCorners(String Filename,Int32 Radius)
        {
            System.Drawing.Image im =
             System.Drawing.Image.FromFile(Server.MapPath(Filename));
    
            Bitmap Bmp = new Bitmap(im, im.Width, im.Height);
            Graphics G = Graphics.FromImage(Bmp);
            Brush brush = new System.Drawing.SolidBrush(Color.Red);
    
     
    
            for (int i = 0; i < 4; i++)
            {
                Point[] CornerUpLeft = new Point[3];
    
                CornerUpLeft[0].X = 0;
                CornerUpLeft[0].Y = 0;
    
                CornerUpLeft[1].X = Radius;
                CornerUpLeft[1].Y = 0;
    
                CornerUpLeft[2].X = 0;
                CornerUpLeft[2].Y = Radius;
    
                System.Drawing.Drawing2D.GraphicsPath pathCornerUpLeft =
                   new System.Drawing.Drawing2D.GraphicsPath();
    
                pathCornerUpLeft.AddArc(CornerUpLeft[0].X, CornerUpLeft[0].Y,
                    Radius, Radius, 180, 90);
                pathCornerUpLeft.AddLine(CornerUpLeft[0].X, CornerUpLeft[0].Y,
                    CornerUpLeft[1].X, CornerUpLeft[1].Y);
                pathCornerUpLeft.AddLine(CornerUpLeft[0].X, CornerUpLeft[0].Y,
                    CornerUpLeft[2].X, CornerUpLeft[2].Y);
    
                G.FillPath(brush, pathCornerUpLeft);
                pathCornerUpLeft.Dispose();
    
                Bmp.RotateFlip(RotateFlipType.Rotate90FlipNone);
            }
    
            brush.Dispose();
            G.Dispose();
    
            Color backColor = Bmp.GetPixel(0, 0);
    
            Bmp.MakeTransparent(backColor);
    
            return Bmp;
           
        }
    }
  4. In Default.aspx, insert:
  5. <body style="background-color:Black">
      <form id="form1" runat="server"  >
        <asp:Image runat="server" ID="MyPicture" 
            ImageUrl="~/PictureViewer.aspx?Filename=Wolf.jpg&Radius=50"/>
        <asp:Image runat="server" ID="Image1" 
            ImageUrl="~/PictureViewer.aspx?Filename=me.jpg&Radius=120"/>
      </form>
    </body>
  6. Don’t forget to add your own pictures in the project instead of mine: Wolf.jpg and me.jpg.

Good luck!

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

No Biography provided

Comments and Discussions

 
QuestionErrorIn My Host PinmemberMember 100224461-May-13 7:50 
AnswerRe: ErrorIn My Host Pinmembermshatami8-Nov-13 4:47 
Questionhow can we treat the address of the image path ? Pinmembervijay_dahite17-Feb-10 2:12 
GeneralTo Dmitri Nesteruk and to All who are worried about “GDI+ is slow” [modified] PinmemberZhupanov Valeriy20-Sep-09 0:42 
GeneralRe: To Dmitri Nesteruk and to All who are worried about “GDI+ is slow” PinmemberDmitri Nesteruk20-Sep-09 9:59 
GeneralWhat do you think about this? [modified] PinmemberZhupanov Valeriy20-Sep-09 13:00 
GeneralRe: To Dmitri Nesteruk and to All who are worried about “GDI+ is slow” Pinmembermambo_222-Sep-09 12:34 
GeneralGDI+ is slow PinmemberDmitri Nesteruk18-Sep-09 20:56 
GeneralRe: GDI+ is slow PinmemberZhupanov Valeriy20-Sep-09 9:05 
GeneralThank everybody for ideas!!! PinmemberZhupanov Valeriy16-Sep-09 5:52 
GeneralMy vote of 2 Pinmembermambo_215-Sep-09 10:34 
GeneralRe: My vote of 2 Pinmembergstolarov16-Sep-09 5:32 
GeneralNice Code PinmemberJ walia14-Sep-09 17:06 
QuestionNice solution! What about performance overhead? PinmemberDrABELL14-Sep-09 12:20 
AnswerRe: Nice solution! What about performance overhead? [modified] PinmemberZhupanov Valeriy20-Sep-09 8:34 
GeneralIf only that could be done in CSS Pinmembernistrum40414-Sep-09 11:53 
GeneralMore flexible variant with borders [modified] PinmemberZhupanov Valeriy12-Sep-09 13:44 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.141223.1 | Last Updated 14 Sep 2009
Article Copyright 2009 by Zhupanov Valeriy
Everything else Copyright © CodeProject, 1999-2014
Layout: fixed | fluid