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How to use DataRelation in ADO.NET

Posted Date: 15 Sep 2008 Resource Type: Code Snippets Category: ADO.NET

Posted By: Prafulla S Shimpi Member Level: Gold
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Points: 10

This is very helpful class when your Dataset contains more than one table.
You can set up relationships between two tables using this class, setting up relationship between two DataColumn objects.

VB.Net Implementation of the same is:



Dim objPrCol As System.Data.DataColumn
Dim objCldCol As System.Data.DataColumn

objPrCol  = dsInvestors.Tables["Investors"].Columns["InvestorId"];
objCldCol = dsInvestors.Tables["Orders"].Columns["InvestorId"];

Dim objRel As System.Data.DataRelation = [ic:ccc]new System.Data.DataRelation("InvestorOrders", [ic:ccc]objPrCol , objCldCol )
dsInvestors.Relations.Add(objRel )

It automatically takes care of the relation while CRUD operations.

There is class level detailed information provided on MSDN for the same.

This is usually recommended to use with Database handling with RDBMS.

For more details, visit http://msdn.microsoft.com/en-us/library/system.data.datarelation.aspx

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