ASP.NET Tutorial/Development/Image

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Create an image based on query string (C#)

   <source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="ContentAndGraphics" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">

   <title>Untitled Page</title>

</head> <body>

   <form id="form1" runat="server">
       <asp:Label id="Label1" runat="server">Here is some content.</asp:Label>
     

<asp:Image id="Image1" runat="server" ImageUrl="Default.aspx?Name=Joe%20Brown"></asp:Image>

<asp:Label id="Label2" runat="server">Here is some more content.</asp:Label>
   </form>

</body> </html>

File: Default.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="GraphicalText" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">

   <title>Untitled Page</title>

</head> <body>

   <form id="form1" runat="server">
   </form>

</body> </html> File: Default.aspx.cs 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.Drawing; public partial class GraphicalText : System.Web.UI.Page {

   protected void Page_Load(object sender, EventArgs e)
   {
       if (Request.QueryString["Name"] == null)
       {
       }else{
           string name = Request.QueryString["Name"];
           Bitmap image = new Bitmap(300, 50);
           Graphics g = Graphics.FromImage(image);
           g.FillRectangle(Brushes.LightYellow, 0, 0, 300, 50);
           g.DrawRectangle(Pens.Red, 0, 0, 299, 49);
           Font font = new Font("Courier New", 20, FontStyle.Regular);
           g.DrawString(name, font, Brushes.Blue, 10, 0);
           image.Save(Response.OutputStream,System.Drawing.Imaging.ImageFormat.Gif);
           g.Dispose();
           image.Dispose();
       }
   }

}</source>


Generate Image, paint string with font and draw image (C#)

   <source lang="csharp">

File: Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="GraphicalText" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">

   <title>Untitled Page</title>

</head> <body>

   <form id="form1" runat="server">
   </form>

</body> </html>

File: Default.aspx.cs 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.Drawing; public partial class GraphicalText : System.Web.UI.Page {

   protected void Page_Load(object sender, EventArgs e)
   {
       Bitmap image = new Bitmap(300, 50);
       Graphics g = Graphics.FromImage(image);
       g.FillRectangle(Brushes.LightYellow, 0, 0, 300, 50);
       g.DrawRectangle(Pens.Red, 0, 0, 299, 49);
       Font font = new Font("Alba Super", 20, FontStyle.Regular);
       g.DrawString("This is a test.", font, Brushes.Blue, 10, 0);
       System.Drawing.Image icon = System.Drawing.Image.FromFile(Server.MapPath("your.gif"));
       g.DrawImageUnscaled(icon, 240, 0);
       image.Save(Response.OutputStream,System.Drawing.Imaging.ImageFormat.Gif);
       g.Dispose();
       image.Dispose();
   }

}</source>