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Foundations: Vector Graphics and the WPF Shape Class

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

The System.Windows.Shapes namespace is Charles Petzold's namespace of choice for rendering two-dimensional vector graphics in WPF. Here he explains why.

Charles Petzold

MSDN Magazine March 2008

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More Related Resource Links

Vector Graphics: Build Flexible, Lightweight XML-Based Images for ASP.NET Using Scalable Vector Grap


Scalable Vector Graphics (SVG), a W3C graphics standard built around XML, is one of several vector graphics technologies that allows fast, lightweight drawings such as charts and graphs to be rendered on the fly in an appropriate viewer. There are many advantages to such vector graphics, including conservation of bandwidth and storage media, and flexibility. This article explains these benefits and shows you how to easily add powerful, dynamic, interactive visual elements to your Web applications.

Dennis Forbes

MSDN Magazine July 2003

Vector Graphics and Link to Excel in WPF

Hi guys

I have been trying to get my head around this problem, googling and trying various ideas, and I just wanted your opinion before I go a totally different direction, using some 3rd party components, since I cant seem to be able to do this.

I have created a WPF .NET4 application, that needs to be able to print Excel Charts and Tables in vector graphics. So you need to be able to copy-paste an Excel Chart or Table, and insert it into the application.

1: Right now I am using a 3rd party component to convert Clipboard data into XAML. This is working quite well, however since this is the only company I can find doing this, I would like to have more options. Does anyone know, how to get Excel Graphs and Tables as Clipboard data into a FlowDocument in vector graphics?

2: In time I would also like to able to link these Excel Charts and Tables to the dataset in Excel, from which they came. I have found some examples showing how to embed Excel into WinForms using COM objects, however how would you get whatever these Excel instances are producing into a FlowDocument?

3: If this is not possible, would any other format (FixedDocument?), make the above possible?

Thank you in advance!

Changing the graphics on the home page of a SharePoint site

When you create a site in Microsoft Windows SharePoint Services by using the default Team Site template, the home page includes two default graphics. A Windows SharePoint Services graphic appears in the body of the page, and a picture of a house in a circle appears near the site title. You can change these graphics to customize your site. Changing the smaller graphic requires a Windows SharePoint Services compatible Web page editor

Class Diagrams

Class diagrams show the static structure of the systems. Classes define the properties of the objects which belong to them. These include:

Attributes - (second container) the data properties of the classes including type, default value and constraints.

Creating a Simple Class in C#

The second article in the C# Object-Oriented Programming tutorial describes how classes are created in C# and how behaviour, in the form of publicly visible and private, hidden methods can be added. This demonstrates some of the uses of encapsulation

Static Class for Beginners

In general, the members of a class can be accessed by instance of that class when they are in public, but there comes a situation to access or call members of a class without an instance and this can be achieved by declaring them as static

abstract away the source of the connection string using a class with a static property.

ASP.NET provides a configuration system we can use to keep our applications flexible at runtime. In this article we will examine some tips and best practices for using the configuration system for the best results.

The element of a web.config file is a place to store connection strings, server names, file paths, and other miscellaneous settings needed by an application to perform work. The items inside appSettings are items that need to be configurable depending upon the environment, for instance, any database connection strings will change as you move your application from a testing and staging server into production.

Let's abstract away the source of the connection string using a class with a static property.

MessageQueue Class

This sample demonstrates two way communications using message queuing between a device application and a desktop application. One application sends book order messages to a message queue and another application receives these book orders from the message queue and responds to the device queue that the orders have been processed.

How to change the default page base class?


I've tried setting the <pages pageBaseType="DynamicWebPage" /> value in web.config, but when I response.write out the page type, I'm still getting Microsoft.WebPages.WebPage.

I'm simply trying to sub-class WebPage and add some additional functionality such as a dynamic PageData dictionary similar to Phil Haack's dynamic ViewData dictionary.



Can I replace the EntityObject as base-class in Entity Designer 3.5 sp1?


I'm using EF3.5sp1 for a project, and I've been working around many of its problems... as such, my entity partial classes have a lot of logic in them for change-tracking and whatnot.  Obviously, I'd like to factor this logic out into a common base class, but of course all my objects must derive from EntityObject.  Is it possible to tell them to derive from some class of my own invention (which would actually likely derive from EntityObject themselves)?

I'd rather avoid editing the EDMX file unless the changes will be safe on entity-model-update, since I'm still making changes to the database schema in this early state of my project.


Also, is there any good workaround for the fact that the change isn't tracked when you change EntityReference.EntityKey?

Singleton Pattern and Abstract Class


I know what Singleton Pattern means and Abstract class means.

What I wanted to know was how would this apply to real world.

Could anyone give me any good example or simple explanation.

Say I have a simple website, why would I use any of the above if any.

Why would it simplify my architechture.

Thanks in advace. 

How to implement custom HttpContext for each request under class that implements IHTTPHandler


Hello All,

I created an application and implemented IHTTPHandler for all incoming request ending with ".aspx" extension.

Under "ProcessRequest" module, I am creating an instance of HttpContext (with URL attributes different from my application's URL i.e. if I am working on localhost then speciying Yahoo.com as its URL) and assigning it to "context" which comes as method argument.

After redirection, an error is generated. Also, the custom HTTPContext is not passed to the requested page (default.aspx, in my case.)

Code is as follows.

    Public Sub ProcessRequest(ByVal context As System.Web.HttpContext) Implements System.Web.IHttpHandler.ProcessRequest
            Dim requestedUrl As String
            Dim targetUrl As String
            Dim urlLength As Integer
            'Save settings which will be used while redirecting to appropriate page
            requestedUrl = context.Request.RawUrl
            If requestedUrl.IndexOf("?") >= 0 Then
                targetUrl = requestedUrl.Substring(0, requestedUrl.IndexOf("?"))
                targetUrl = requestedUrl
            End If
            If targetUrl = Nothing Or targetUrl.Length = 0 Then
                targetUrl = requestedUrl
            End If

Using a GenericHandler as a WebResource inside a Class Library



I hope this is the right place to ask this question.

I'm trying to make a control class library. I want to have a GenericHandler as a WebResource so I could call it from the web project that will use that control.

I need this handler will get parameters from the query string and return JSON data acourding to what it get in the QS.

I know how to create JS and images WebResources, so I tried the same on a generic handler I added to the class library project but all it does is return the source of the handler file and not the result.


Is what I'm trying to do possible? If so, what should I do?


Thank :-)

Using loginName to find ADInfo from an outside class



I wrote a class to pull adinfo and for the life of me I can't seem to figure

out why it says "Invalid Login Name" no matter what I type in. If I leave

it blank it seems to work properly but it doesn't seem to be actually searching

the AD. I'll drop the whole class here, it's being initiated by a button click

on an outside form.


Thanks in Advance for any help Offered,



Imports System.DirectoryServices
Imports Microsoft.VisualBasic
Imports System.String
Imports System.Collections
Imports System.Security.Principal
Imports System.Security.Permissions

Namespace LoginButton
    Public Class LoginButton

        'Class Variables
        Dim UserID As String = Nothing
        Dim DomainDN As String = ConfigurationManager.AppSettings("myConnectionString")
        Dim ADEntry As DirectoryEntry = New DirectoryEntry(DomainDN)
        Dim objSearch As New System.DirectoryServices.DirectorySearcher(ADEntry)
        Dim oResults As DirectoryServices.SearchResultCollection
        Dim oResult As DirectoryServices.SearchResult
        Dim RetArray As New Hashtable
        Dim page As Page = DirectCast(HttpContext.Current.Handler, Page)
        Dim TextLogin = DirectCast(page.FindControl("

Localization not working in class library (composite control)



I have a class library called WEM.portal which used Resource files to localise text in my composite controls.

I store my resource files (eg MyResourceFile1.resx) in App_GlobalResources folder and then refer to them using

MyLabel1.text = My.Resources.MyResourceFile1.MyResourceKey1

This is all working ok until I create seperate files for each language such as MyResourceFile1.FR-fr.resx.

I have implemented this throughout my other web applications but the Class Library doesnt seem to want to work the same way

When I load the page it correctly showes the resourced keys which I have done through the web application BUT the resource keys in the composite controls does not seem to pick up the culture code.

Am I missing something stupid. Ive tried

  • changing the Build Action on the resource file to Content and Custom tool to GlobalResourceProxyGenerator
  • Creating a resourceManager but to no avail


Make sure that the class defined in this code file matches the 'inherits' attribute, and that it e


Here is the page directive for the page that throws the error:

@ Page language="c#" Inherits="University.AspNet.Index" CodeFile="Index.aspx.cs" %>

The code behind file Index.aspx.cs starts like this:

using University.Framework.UI;

namespace University.AspNet

public partial class Index : University.Framework.UI.HomePage

The code behind is extending this HomePage class, which is in turn an extenstion of another class University.Framework.UI.Page, which extends the System.Web.UI.Page class.

Am I misusing the I

Accessing Functions from a Class



I am a PHP developer and am running into a lot of issues with C# and .NET. I would like to be able to do the following in C#. (i'm not sure if it should be done this way though)

C# File:

using System;
using System.Data.Odbc;
using System.Data;
using System.Configuration;

partial class site_functions : System.Web.UI.Page

protected void Main(object sender, EventArgs e)

public static void open_database()
OdbcConnection myConn;
OdbcDataReader MyReader = null;
string strConnection = ConfigurationSettings.AppSettings["dbConnect"];

myConn = new OdbcConnection(strConnection);

public void close_database()

public void Read_Database()
//do something


<%@ Page Language="C#" CodeFile="site-functions.cs" Inherits="site_functions" ContentType="text/html" ResponseEncoding="utf-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
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