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How to make pictures with rounded corners in ASP.NET

By , 14 Sep 2009
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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)

About the Author

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Comments and Discussions

 
QuestionErrorIn My Host PinmemberMember 100224461-May-13 6:50 
hi
i used this code   (PictureViewer.aspx) in 2 host
one of them not worked
 
see this   working : http://markaz3.progman.ir/contact
this host is win2008 r2
 
and this not worked :   http://Markaz3.ir/contact
this host is win2008
 
Why?
Help Me Please
AnswerRe: ErrorIn My Host Pinmembermshatami8-Nov-13 3:47 
Questionhow can we treat the address of the image path ? Pinmembervijay_dahite17-Feb-10 1:12 
GeneralTo Dmitri Nesteruk and to All who are worried about “GDI+ is slow” [modified] PinmemberZhupanov Valeriy19-Sep-09 23:42 
GeneralRe: To Dmitri Nesteruk and to All who are worried about “GDI+ is slow” PinmemberDmitri Nesteruk20-Sep-09 8:59 
GeneralWhat do you think about this? [modified] PinmemberZhupanov Valeriy20-Sep-09 12:00 
GeneralRe: To Dmitri Nesteruk and to All who are worried about “GDI+ is slow” Pinmembermambo_222-Sep-09 11:34 
GeneralGDI+ is slow PinmemberDmitri Nesteruk18-Sep-09 19:56 
GeneralRe: GDI+ is slow PinmemberZhupanov Valeriy20-Sep-09 8:05 
GeneralThank everybody for ideas!!! PinmemberZhupanov Valeriy16-Sep-09 4:52 
GeneralMy vote of 2 Pinmembermambo_215-Sep-09 9:34 
GeneralRe: My vote of 2 Pinmembergstolarov16-Sep-09 4:32 
GeneralNice Code PinmemberJ walia14-Sep-09 16:06 
QuestionNice solution! What about performance overhead? PinmemberDrABELL14-Sep-09 11:20 
AnswerRe: Nice solution! What about performance overhead? [modified] PinmemberZhupanov Valeriy20-Sep-09 7:34 
GeneralIf only that could be done in CSS Pinmembernistrum40414-Sep-09 10:53 
GeneralMore flexible variant with borders [modified] PinmemberZhupanov Valeriy12-Sep-09 12:44 

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