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How to check for duplicate entries in Data Table - VB.Net

Posted on 2011-05-03
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Last Modified: 2012-05-11
Hello Experts,

I have data table comprised of 3 coulmns (Channel Name, Channel ID, Channel Type)

I'm looking for an efficient VB.net code for looping through the table to detect if I have duplicated channel names.

Someting along the following lines:

For Each drRow in dtChannelsList.Rows
 code goes here to check if drRow.item("ChannelName") is duplicate

Appreciate your help
Hani

 
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Question by:Mehawitchi
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Accepted Solution

by:
Imran Javed Zia earned 2000 total points
ID: 35513151
Hi,

Please try following code

For Each drRow In dtChannelsList.Rows
            Dim drs As DataRow() = dtChannelsList.Select("ChannelName='" + drRow("ChannelName") + "'")

            If drs.Length > 0 Then
                'Add Your code here to handle the duplication
            End If
        Next

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Thanks
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Author Comment

by:Mehawitchi
ID: 35513185
Hello IJZ,

Thank you for the quick response.

I think I should use 1 instead of 0 in the following:
If drs.Length > 0
because there will be already one record for the same name. Right?

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LVL 16

Expert Comment

by:Imran Javed Zia
ID: 35513262
Yes you are right
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