Concatenate row items to single string inside for each row

Hi, I want to concatenate rows inside for each row
I read a datatable and stored in DT. Then, I have used for each row in that DT and check if that “file name” (column in DT) is available in local folder through path exists.
If it exists, then i have write that row(“file name”) like

How to write the row items inside for each row like that

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Hi @rajat_dhammi - sorry this was from a while ago and nobody answered you.

So in your for each loop set up two assign variables.

Your first one for your file name would be like (we will call it ‘Filename’):

Your second one that does the join would be like (we will call it ‘AllFilenames’):
AllFilenames.Join(",", AllFilenames, Filename)

If you want to make sure the first item doesn’t have the comma in the first instance then put it in an If statement like:
If(String.IsNullOrEmpty(AllFilenames), Filename, AllFilenames.Join(",", AllFilenames, Filename))

Hope that helps!