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How to make pictures with rounded corners in ASP.NET

, 14 Sep 2009 CPOL
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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)

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Comments and Discussions

 
QuestionErrorIn My Host Pin
Member 100224461-May-13 7:50
memberMember 100224461-May-13 7:50 
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 Pin
mshatami8-Nov-13 4:47
membermshatami8-Nov-13 4:47 
Questionhow can we treat the address of the image path ? Pin
vijay_dahite17-Feb-10 2:12
membervijay_dahite17-Feb-10 2:12 
GeneralTo Dmitri Nesteruk and to All who are worried about “GDI+ is slow” [modified] Pin
Zhupanov Valeriy20-Sep-09 0:42
memberZhupanov Valeriy20-Sep-09 0:42 
GeneralRe: To Dmitri Nesteruk and to All who are worried about “GDI+ is slow” Pin
Dmitri Nesteruk20-Sep-09 9:59
memberDmitri Nesteruk20-Sep-09 9:59 
GeneralWhat do you think about this? [modified] Pin
Zhupanov Valeriy20-Sep-09 13:00
memberZhupanov Valeriy20-Sep-09 13:00 
GeneralRe: To Dmitri Nesteruk and to All who are worried about “GDI+ is slow” Pin
mambo_222-Sep-09 12:34
membermambo_222-Sep-09 12:34 
GeneralGDI+ is slow Pin
Dmitri Nesteruk18-Sep-09 20:56
memberDmitri Nesteruk18-Sep-09 20:56 
GeneralRe: GDI+ is slow Pin
Zhupanov Valeriy20-Sep-09 9:05
memberZhupanov Valeriy20-Sep-09 9:05 
GeneralThank everybody for ideas!!! Pin
Zhupanov Valeriy16-Sep-09 5:52
memberZhupanov Valeriy16-Sep-09 5:52 
GeneralMy vote of 2 Pin
mambo_215-Sep-09 10:34
membermambo_215-Sep-09 10:34 
GeneralRe: My vote of 2 Pin
gstolarov16-Sep-09 5:32
membergstolarov16-Sep-09 5:32 
GeneralNice Code Pin
J walia14-Sep-09 17:06
memberJ walia14-Sep-09 17:06 
QuestionNice solution! What about performance overhead? Pin
DrABELL14-Sep-09 12:20
memberDrABELL14-Sep-09 12:20 
AnswerRe: Nice solution! What about performance overhead? [modified] Pin
Zhupanov Valeriy20-Sep-09 8:34
memberZhupanov Valeriy20-Sep-09 8:34 
GeneralIf only that could be done in CSS Pin
nistrum40414-Sep-09 11:53
membernistrum40414-Sep-09 11:53 
GeneralMore flexible variant with borders [modified] Pin
Zhupanov Valeriy12-Sep-09 13:44
memberZhupanov Valeriy12-Sep-09 13:44 

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