Datatable contains duplicate row

Question

1.00/5 (2 votes)

See more:

I have data table in c# and it contains more columns and rows I need to find the duplicate row and show the row number. Data table always comes with undefined column names it’s not fixed columns.Anyone please help me on this ?

C#

string CSVFilePathName = @"C:\Application Details\HH- Duplicate Rows work\Contains Duplicate Row.csv";

DataTable dt = ConvertCSVtoDataTable(CSVFilePathName);
if (dt.Rows.Count != DT1.Rows.Count)
{
    DataTable dt_UnCommonRows = new DataTable();
    if(dt.Rows.Count > 0 && DT1.Rows.Count > 0)
    {
        var DTS = dt.AsEnumerable().Except(DT1.AsEnumerable(), System.Data.DataRowComparer.Default);
dt_UnCommonRows = DTS.CopyToDataTable();
    }

What I have tried:

I tried with Linq but getting the error.

Error:The source contains no DataRows.

C#

Dt =dr.AsEnumerable().Except(DT1.AsEnumerable(),System.Data.DataRow compared.Default).CopyTiDataTable();

Posted 11-Jun-24 3:54am

prabhug100

Updated 11-Jun-24 6:32am

Dave Kreskowiak

v3

Add a Solution

Comments

Jo_vb.net 11-Jun-24 11:22am

We cannot see the source code which causes the error, so don't expect too much feedback.

prabhug100 11-Jun-24 11:48am

string CSVFilePathName = @"C:\Application Details\HH- Duplicate Rows work\Contains Duplicate Row.csv";

DataTable dt = ConvertCSVtoDataTable(CSVFilePathName);
if (dt.Rows.Count != DT1.Rows.Count)

{

DataTable dt_UnCommonRows = new DataTable();

if(dt.Rows.Count > 0 && DT1.Rows.Count > 0)

{

var DTS = dt.AsEnumerable().Except(DT1.AsEnumerable(), System.Data.DataRowComparer.Default);

dt_UnCommonRows = DTS.CopyToDataTable();

}

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2024-06-11T06:14:00

The easiest way to do this is not to compare the rows directly but to generate a hash code (MD5 is both simple to produce and complex enough to work nicely) for the content of each row, and then find identical hash values. (For absolute certainty, you can then compare those rows directly to be sure it's not a hash collision though that's unlikely in the phase space of MD5 unless you are handling huge numbers of rows).