Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win


Selecting Child Rows using RowFilter

Posted on 2006-07-04
Medium Priority
Last Modified: 2007-12-19
Hi, im having problems regarding how to filter child rows given a certain condition.

Here is my schema:

 - ID PK
 - Username VARCHAR

 - ID PK

 - ID PK
 - UserID FK -> tblUsers.ID
 - RoleID FK -> tblRoles.ID

Now, lets say we populate our dataset based on my given schema. My problem is I want to filter out rows using RowFilter. What I did is something like this:

daMyDataAdapter.Fill( myDataSet );

DataView dv = new DataView();
dv.table = myDataSet.tblUsers;
dv.RowFilter = "Child(tblUser2Role).RoleID = " + RoleID.toString();

Writing this, I getting the error "Cannot interpret token 'Child'".

Is there anyway I could do the same thing by using filters other than this? I dont want to fill again using dataAdaptor since it will be inefficient since the rows i want already exist in dataset, all I want is filtering it out.

Many thanks.

Question by:anthon007r
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
LVL 44

Expert Comment

ID: 17035842
Hi anthon007r,

you can't do it like that

there are some alternatives offered there and i think for your situation the in (RoleID) syntax could be helpfull


Author Comment

ID: 17035997
Thanks bruintje for a swift reply, but how could I possibly filter out users who belong to a certain role using the "in" keyword in RowFilter?

Author Comment

ID: 17036001
I mean, tblUsers is a parent table, there's no roleID that could be referenced (using 'in') other than its child table which is tblUser2Role. Am I missing something?
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

LVL 44

Accepted Solution

bruintje earned 2000 total points
ID: 17036047
i have no way to test this but i tried to rewrite the code from that thread using your tables

            DataRow[] drs = myDataSet.tblUsers2.Select("RoleID=" + RoleID.toString());
            string rowFilter = "ID in (";
            foreach (DataRow dr in drs)
                rowFilter += dr["RoleID"].ToString() + ",";
            //Note, the extra comma at the end doesn't matter
            rowFilter += ")";
            dv1 = new DataView(tblUsers, rowFilter, "ID", DataViewRowState.CurrentRows);
            dataGridView1.DataSource = dv1;

Author Comment

ID: 17036918
Wow, great, got it! I wonder how or why did I missed the thought behind the "in".

Many thanks to you buintje :)
Im tired of googling this thing glad found it.
LVL 44

Expert Comment

ID: 17037152
well i'm glad it works :) thanks for the grade

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

It seems a simple enough task, yet I see repeated questions asking how to do it: how to pass data between two forms. In this article, I will show you the different mechanisms available for you to do just that. This article is directed towards the .N…
A long time ago (May 2011), I have written an article showing you how to create a DLL using Visual Studio 2005 to be hosted in SQL Server 2005. That was valid at that time and it is still valid if you are still using these versions. You can still re…
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…

636 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