How Do I Get Stream From File

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i want to ask..
how do i get stream from file in vb.net?
i want to save that stream in database..and in my database, i set data type varbinary (max) to save stream

hope you can help me :)
thanks very much

Posted 22-May-14 20:16pm

Peter Yohanes

Updated 24-Oct-22 1:39am

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5 solutions

Solution 3

To Stream:

VB

Dim fs As IO.FileStream
fs = New FileStream("File Path", FileMode.Open)

To Byte Array:
* Using FileSystem

VB

Dim readBytes(LengthYouWantToRead - 1) As Byte
fs.Read(readBytes, 0, LengthYouWantToRead)

* Using IO.File

VB

Dim readBytes() As Byte
readBytes = IO.File.ReadAllBytes("File Path")

(FileStream Example)
If you want to read 4096 Bytes from file,
write your code like this:

VB

Dim readBytes(4096 - 1) As Byte
fs.Read(readBytes, 0, 4096)

Posted 23-May-14 18:43pm

SlaneR

Solution 1

The following code opens a file using System.IO.FileSystem to Append:

VB

Dim file As System.IO.FileStream
file = New FileStream("streamtest.txt", FileMode.Append)

To write text:

VB

Dim bytes() As Byte
bytes = Encoding.ASCII.GetBytes("Example text")
file.Write(bytes, 0, bytes.Length)

To close the file:

VB

file.Close()

I can not figure out what you meant by "i want to save that stream in database".

Posted 22-May-14 20:29pm

Manikandan10

Comments

Peter Yohanes 23-May-14 2:40am

in my program, i upload file and it save to database..
so user can download that file again and i must save that varbinary every file correctly..
your solution still can't help me,i just try it..
thanks for your time :)

Solution 6

string fileName = "Dummy.xml";
string resourceName = "Namespace0.Folder.Folder2.DataFolder." + fileName;
 

var resource = Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);

Posted 24-Oct-22 1:39am

Member 15807861

Comments

Dave Kreskowiak 24-Oct-22 8:36am

If you would have read the previous answers from over the years, you would have seen the question has to do with actual files on disk, not in application resources.

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Peter Leow · Accepted Answer · 2014-05-23T19:34:00

Solution 4

Check these out:
1. saving-and-retrieving-file-using-filestream-sql-server-2008.aspx[^]
2. adding-and-reading-files-from-sql-server-2008-filestream[^]

Posted 23-May-14 19:34pm

Peter Leow

Comments

Peter Yohanes 25-May-14 13:54pm

okay thank Peter Leow..
it's very help me :)
have you ever use system watcher in vb.net? :)

**Manoj K Bhoir** · Accepted Answer · 2014-05-24T03:47:00

You can Directly use ReadAllBytes() Shared Function of System.IO.File insted of file Stream. See the below code :

VB

Dim _mFileBytes As Byte() = System.IO.File.ReadAllBytes("Your File Path")

After that you can directly save this Byte Array (In above example _mFileBytes) in the Database with the column having Data Type Varbinary().

For more Details : How to Insert Byte Array In SQL Server Database Table(VB.NET).[^]

I hope this will help you. :)