What is System.Collections.Generic.List(Of String) type

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Hi,

I used TwainLib.dll library from http://www.youtube.com/watch?v=eA-MeWKiPAw[^]Here.

Dim FileNames = TwainLibScanImages(, , My.Setting.Scan)

How can I know the type of FileNames? But when I hover over it and it state it is " Dim FileNames As System.Collections.Generic.List(Of String)".

It's a weird type for me. How can I store the stuff (It's file location path) it returned to a String Type. It's always produce an error when i try to store the value it returned to a String. Plz help!

Posted 10-Dec-12 18:35pm

Valentine1993

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Sergey Alexandrovich Kryukov 11-Dec-12 0:52am

What do you mean "what is"? As you say, it tells you what is it, so what's your question about it? This is a generic type, not just type.

And where is the link to the library? Video is not the library (and trying to learn on video does not mean studying).
--SA

Valentine1993 11-Dec-12 1:13am

The link to library is http://mka-soft.com/downloads/Accessing%20Twain%203.zip[^]

I know that, videossss are not library. Doing stuff like scanning image to VB is a hard to find stuff. So what is a generic type?

2 solutions

Solution 2

Read more about generics support in the framework -
http://msdn.microsoft.com/en-us/library/ms172192.aspx[^]
.NET Generics in a Nutshell[^]
Generics Explained (.NET Framework version 2.0)[^]

Posted 10-Dec-12 18:59pm

Abhinav S

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Sergey Alexandrovich Kryukov 11-Dec-12 1:07am

Useful links, a 5.
--SA

Abhinav S 11-Dec-12 1:54am

Thank you SA.

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-12-10T18:57:00

Solution 1

This is a generic type, and one of those which no one can afford to be unaware of.

Before going to TWAIN and other advanced issues, I would advise you to learn the language and basics of .NET. As you don't even know generics, you cannot move much further. You need to learn all the language, not just simple fragments. Read this:
http://msdn.microsoft.com/en-us/library/aa479859.aspx[^].

—SA

Posted 10-Dec-12 18:57pm

Sergey Alexandrovich Kryukov

Comments

Abhinav S 11-Dec-12 0:59am

My 5.

Sergey Alexandrovich Kryukov 11-Dec-12 1:07am

Thank you, Abhinav.
--SA

Valentine1993 11-Dec-12 1:18am

Thanks. I just figured out the way to get the location path.

Sergey Alexandrovich Kryukov 11-Dec-12 11:29am

Very good.
Wish you the best of luck,
--SA

Valentine1993 11-Dec-12 19:27pm

Hi. Thanks for helping me.