Solved

Implementing an Extension to EntityDataSource in VWD 2010

Posted on 2013-05-14
3
305 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

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Today is the age of broadband.  More and more people are going this route determined to experience the web and it’s multitude of services as quickly and painlessly as possible. Coupled with the move to broadband, people are experiencing the web via …
ASP.Net to Oracle Connectivity Recently I had to develop an ASP.NET application connecting to an Oracle database.As I am doing it first time ,I had to solve several problems. This article will help to such developers  to develop an ASP.NET client…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

929 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

Need Help in Real-Time?

Connect with top rated Experts

6 Experts available now in Live!

Get 1:1 Help Now