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Old April 26th, 2010, 06:04 AM
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Default comparing two datatables

Hi all

i am developing web apps using C# and asp.net 2.0. I am using framework 2.0
i have two datatables both of them are having equal no. of columns namely EmployeeId,Designation and Remarks. Tables are T1 and T2. I want to have records from both of them and need to store in a new datatable. I have the following query which actually needs to be used here:

select a.empno,b.designation,b.remarks from t2 a left outer join t1 b
on a.empno = b.empno
Please throw some light how to do it in C#/ado.net
Old April 26th, 2010, 08:56 AM
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That query will show records that are the same on the two tables.. you need differents ones only???


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Old October 31st, 2011, 01:22 AM
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Use LINQ if you are coding under with C# 3 and or .NET. It’s a very powerful language feature, with support for quering objects and memory. So you can just do simple queries from you DB o your app with SELECT * FROM ..., then fill them in their respective collections then you can use LINQ to manage and compare them very easily. If that sounds simpler to you.

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