Solved

Implementing an Extension to EntityDataSource in VWD 2010

Posted on 2013-05-14
3
307 Views
Last Modified: 2013-05-15
In Visual Web Developer 2010, I'm trying to implement the extension to EntityDataSource described on this page that enables Insert() to be used as a method:

http://social.msdn.microsoft.com/forums/en-US/adodotnetentityframework/thread/d8a3ecd8-55dd-45ad-8175-d7ce912f46c2/

I get a compile error "CS0246: The type or namespace name 'EntityDataSource' could not be found (are you missing a using directive or an assembly reference?)"

I originally created the class as provided on this page:
http://forums.asp.net/t/1621469.aspx/1

No difference between the 2 (except the 1st link's version actually gets VWD to recognize the EntityDataSourceExtentions class name as something - color codes it in blue-green.)
I should be using .NET 4.0.
0
Comment
Question by:universalglove
  • 3
3 Comments
 

Author Comment

by:universalglove
ID: 39168897
These are the contents of the class, saved as EntityDataSourceExtentions.cs in App_Code:

using System.Collections.Specialized;

namespace System.Web.UI.WebControls
{
	public static class EntityDataSourceExtentions
	{
		private static bool DefaultOperationCallback(int affectedRows, Exception ex)
		{
				return false;
		}
		public static void Insert(this EntityDataSource dataSource)
		{
				(dataSource as IDataSource).GetView(string.Empty).Insert(new OrderedDictionary(),DefaultOperationCallback);
		}
	}
}

Open in new window


This is the content of web.config, since that seems to play a role in adding different assemblies to the compile:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <connectionStrings>
    <add name="CustomConn" connectionString="Removed=true;" providerName="System.Data.SqlClient" />
    <add name="CustomEntities" connectionString="removed=true;multipleactiveresultsets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
    <add name="TestConn" connectionString="removed=true;multipleactiveresultsets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
        <add assembly="System.Security, Version=4.0.0.0, Culture=neutral, PublicKeyToken=X1" />
        <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=X2" />
        <add assembly="System.Data.Entity.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=X3" />
      </assemblies>
      <buildProviders>
        <add extension=".edmx" type="System.Data.Entity.Design.AspNet.EntityDesignerBuildProvider" />
      </buildProviders>
    </compilation>
    <customErrors mode="Off" />
    <pages>
      <controls>
        <add tagPrefix="custom" tagName="SidebarAds" src="~/_user_controls/SidebarAds.ascx" />
        <add tagPrefix="custom" tagName="ComingSoon" src="~/_user_controls/ComingSoon.ascx" />
        <add tagPrefix="custom" tagName="StateSelect" src="~/_user_controls/StateSelect.ascx" />
      </controls>
    </pages>
  </system.web>
</configuration>

Open in new window


Now that I'm looking at web.config, I noted on a few websites, that there was a difference between "System.Data.Entity" and "System.Web.Entity". Should there be a .Web.Entity assembly added to make this work? Anyone happen to know its tag?
0
 

Accepted Solution

by:
universalglove earned 0 total points
ID: 39169062
Apparently the verbiage I needed to know is "reference".
And the menu to deal with this in VWD is Website > Add Reference... followed by the .NET tab.

Gives me:
        <add assembly="System.Web.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Web.Entity.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

Open in new window


(And just to know, apparently the PublicKeyToken is not any sort of sensitive data.
Helpful info:
http://stackoverflow.com/questions/4807420/adding-assembly-reference-within-web-config
http://en.wikipedia.org/wiki/.NET_assembly
)

And, finally, I added the EntityDataSourceExtentions.cs file back into the App_Code folder, and rebuilt the site, and I don't get the compile error anymore.
(Funny that I should have to add in a reference to that assembly when I'm already using the datasource in the page successfully. Be blessed if I knew how it was all working.)
So while I still don't know if EntityDataSource.Insert() will solve my design problem, I at least got past the initial, obnoxious compile error.
0
 

Author Closing Comment

by:universalglove
ID: 39169065
Found it myself; no time saved.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Lots of people ask this question on how to extend the “MembershipProvider” to make use of custom authentication like using existing database or make use of some other way of authentication. Many blogs show you how to extend the membership provider c…
This article discusses the ASP.NET AJAX ModalPopupExtender control. In this article we will show how to use the ModalPopupExtender control, how to display/show/call the ASP.NET AJAX ModalPopupExtender control from javascript, how to show/display/cal…
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question