No Image

  • Thread starter Thread starter Web Team @ Borough of Poole
  • Start date Start date
W

Web Team @ Borough of Poole

Hi All,

I have borrowed some code from here:
http://www.codeproject.com/aspnet/aspnet_web_graphics.asp

This works as expected when I use in-line code, but when I moved it to
code-behind, it stops working. The image does not appear, no
errors...all I get is a blank HTML page:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html;
charset=windows-1252"></HEAD>
<BODY></BODY></HTML>

Note the content type of text/html.


Heres my code-behind:

Imports System.Drawing
Imports System.Drawing.Text
Imports System.Drawing.Imaging
Imports System.Drawing.Drawing2D

Public Class image
Inherits System.Web.UI.Page

#Region " Web Form Designer Generated Code "

'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()

End Sub

'NOTE: The following placeholder declaration is required by the Web
Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub

#End Region

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load

Response.Clear()
Dim height As Integer = 100
Dim width As Integer = 200
Dim r As New Random
Dim x As Integer = r.Next(75)

Dim bmp As New Bitmap(width, height,
PixelFormat.Format24bppRgb)
Dim g As Graphics = Graphics.FromImage(bmp)

g.TextRenderingHint = TextRenderingHint.AntiAlias
g.Clear(Color.Orange)
g.DrawRectangle(Pens.White, 1, 1, width - 3, height - 3)
g.DrawRectangle(Pens.Gray, 2, 2, width - 3, height - 3)
g.DrawRectangle(Pens.Black, 0, 0, width, height)
g.DrawString(Request.QueryString("overlaytext"), _
New Font("Arial", 14, FontStyle.Italic), _
SystemBrushes.WindowText, New PointF(x, 50))
bmp.Save(Response.OutputStream, ImageFormat.Jpeg)
g.Dispose()
bmp.Dispose()
Response.End()

End Sub

End Class

Heres my web form (ASPX) page:

<%@ Page Language="VB" ContentType="image/jpeg" %>


Hope someone can help! :)

Regards,

Simon.
 
I noticed the lack of codebehind and inherits attributes in the aspx. ASP.NET
needs some way to associate the code with the content.
 
Hi Brad,

THANK YOU! Working AOK now!

For the benefit of the audience...

My ASPX page directive now reads:
<%@ Page Language="vb" AutoEventWireup="false"
Codebehind="dynamic_image_text.aspx.vb"
Inherits="myr_project_name.dynamic_image_text" ContentType="image/jpeg"
%>

Thanks again!

Simon.
 
Back
Top