EntityDataSource filter using where with LIKE keyword but Contains method.

If you have a SQL statement like this.

 

SELECT * FROm Products WHERE ProductName LIKE ‘%Ch%’

 

In LINQ you might want to do.

 

var pp = from p in db.Products where p.ProductName.Contains("Ch") select p;

 

Yes, this will work in code behind but how about EntityDataSource? Would you do:

 

      <asp:EntityDataSource ID="EntityDataSource1" runat="server"

        ConnectionString="name=SixSigmaEntities"

        DefaultContainerName="SixSigmaEntities" EnableFlattening="False"

        EntitySetName="Products"

        Where="it.ProductName.Contains(&quot;Ch&quot;)" EntityTypeFilter="" Select="">

      </asp:EntityDataSource>

 

Well, time to have nightmare because that does not work. You will get a scree like below.

 

 EntityDataSourceError

 

But it works like this.

 

      <asp:EntityDataSource ID="EntityDataSource1" runat="server"

        ConnectionString="name=SixSigmaEntities"

        DefaultContainerName="SixSigmaEntities" EnableFlattening="False"

        EntitySetName="Products"

        Where="it.LastName LIKE ‘%Ch%’" EntityTypeFilter="" Select="">

      </asp:EntityDataSource>

 

Resource:

http://social.msdn.microsoft.com/Forums/en/adodotnetentityframework/thread/0a3eaab5-f77e-491f-8ed8-d054c5c4d3c6

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress (http://www.pcworld.com/article/206455/Microsoft_Live_Spaces_Moves_to_WordPress_An_FAQ.html) till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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3 Responses to EntityDataSource filter using where with LIKE keyword but Contains method.

  1. ojdana says:

    I found it useful. thx for that.

  2. If you need to pass in a parameter you will need to wrap in quotes seperated by + ,e.g.:
    like ‘%’ + @myParam + ‘%’

  3. Alfonso says:

    I was about to throw my laptop out of the window 🙂
    Thanks a lot!

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