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This article will give you a detailed explanation on how to operate the VB.NET stream correctly. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

A stream is an abstract concept of a byte sequence, or a binary sequence generated by a computer when it processes files or data. Next we will use this simple example to learn how to use VB.NET stream classes to manipulate files.

Before learning this simple example, it is necessary to give a brief introduction to the VB.NET stream.

We all know that the English word "stream" is "Stream", so in VB.NET, we directly use the Stream to represent the stream class. Stream is the abstract base class for all streams. Generally speaking, you don't use the Stream class directly, because the functionality it provides is not powerful. The usual method is to use its derived classes (some books are called descendant classes). The most commonly used in these derived classes is the file stream class, which roughly includes the creation of files, the establishment of folders, and the transfer of files. File read and write these four functions, in the following content we will learn how to achieve these four functions.

The most important methods in the file stream class are the Read and Write methods, which are necessary to read and write the file. Remember to call Close to close the stream after you finish reading and writing to the file, otherwise an error message will appear that the file cannot be accessed when accessing the file from another program.

Through the brief introduction above, we have a simple understanding of convection. Let's learn these four programming examples.

The examples are: file transfer in the local computer through VB.NET stream, network transfer or network file transfer of files in the computer through stream, reading and writing text files, reading and writing binary files.

Example one: local file transfer

After streaming any file, this example produces a copy of the same file at the specified location, that is, to realize the copy function of the file.

Private Sub Button1_Click (ByVal

Sender As System.Object, ByVal

E As System.EventArgs)

Handles Button1.Click

FileStreamL ()'to realize the copy function of files

End Sub

Sub FileStreamL ()

Dim fileinf As New System.IO.

FileInfo ("c:\ dd.doc")

'Instantiate the FileInfo class

Dim byt (fileinf.Length () 1)

As Byte

'get the size of the original file

Dim files As New System.IO.

FileStream ("c:\ dd.doc", IO.

FileMode.Open

IO.FileAccess.ReadWrite)

'Instantiate the FileStream class

Dim filesw As New System.IO.

FileStream ("c:\ kp.doc", IO.

FileMode.OpenOrCreate)

'Instantiate the FileStream class

And create an empty new file

Files.Read (byt, 0, byt.Length)

'read the contents of the original file into the byt array

Filesw.Write (byt, 0, byt.Length)

'write the contents of the byt array to a new file

Files.Close () 'closes the stream

Filesw.Close () 'closes the stream

End Sub

Program description: in this code we created a FileStreamL process, in which we first declare that the FileInfo class uses the size of the original file obtained by this class and then declare two FileStream classes, which are used to stream read the original file, that is, to read its data into memory and save it in the Byt array. The second FileStream class is used to write the data saved in the Byt array to the specified new file, the original file of this code is the dd.doc file on disk C, and the new file is the "kp.doc" file on disk C.

The parameters in parentheses in this code are explained in detail in MSDN, which is not discussed here.

This is the end of the article on "how to operate the VB.NET stream correctly". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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