How to open a file in Read Only Format using Windows Form Application, C#

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Hii friends

I actually want to open files(.txt, .pdf,.xls) in read only. The files should just be read but shdn`t allow them to be edited.

Can any body suggest how it can be done using Windows Form Application (C#)

Thanks & Regards
Sandy

Posted 18-Apr-11 18:42pm

Sandy058

Updated 21-Jun-18 20:34pm

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-04-18T19:46:00

Solution 2

For example, is you open a file with System.IO.StreamReader, the file will be opened as read-only and by default it will be without shared access, so the same file cannot be opened in other process in no mode, read-only or read-write.

I think you're confused; what do you want to achieve (please don't repeat about file security; the ultimate goals, please)?

—SA

Posted 18-Apr-11 19:46pm

Sergey Alexandrovich Kryukov

Comments

JF2015 19-Apr-11 1:50am

5ed - quite good, but OP does obviously not know what he really wants. - Happens so often...

Sergey Alexandrovich Kryukov 19-Apr-11 1:51am

True. Thank you very much.
--SA

**JF2015** · Answer 2 · 2011-04-18T18:45:00

Solution 1

This is not a problem of opening the file in readonly mode, it is a question of what you do with the data that you read from the file. For example when opening a textfile (*.txt) you could display the content in a Readonly Textbox - this wouldn't allow anyone to change the content.

Posted 18-Apr-11 18:45pm

JF2015

Comments

Sandy058 19-Apr-11 0:54am

Hii,
Yeah I agree with that but we cannot display a .pdf contents into a textbox.. Is there any method to provide security to a particular file.. security in sence... just read only mode...

Sergey Alexandrovich Kryukov 19-Apr-11 1:42am

Read-only does not provide any kind of security. What do you want to achieve?
--SA

Sergey Alexandrovich Kryukov 19-Apr-11 1:43am

What happened to you lately. I need to compensate for most stupid down-votes...
My 5 this time; this is only because the answer is correct, not just to compensate...
--SA

Sergey Alexandrovich Kryukov 19-Apr-11 1:47am

I added my answer, please see...
--SA

nitinneet · Answer 3 · 2018-06-21T20:35:00

Solution 3

System.IO.FileInfo fileObj = new System.IO.FileInfo("C:\temp\readme.txt");
fileObj.Attributes = System.IO.FileAttributes.ReadOnly;
System.Diagnostics.Process.Start(fileObj.FullName);

Posted 21-Jun-18 20:35pm

nitinneet