FileSystem.ReadAllBytes(String) Method
Definition
Important
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Returns the contents of a file as a byte array.
public:
static cli::array <System::Byte> ^ ReadAllBytes(System::String ^ file);public static byte[] ReadAllBytes (string file);static member ReadAllBytes : string -> byte[]Public Shared Function ReadAllBytes (file As String) As Byte()Parameters
- file
- String
File to be read.
Returns
Byte array containing the contents of the file.
Exceptions
The path is not valid for one of the following reasons: it is a zero-length string; it contains only white space; it contains invalid characters; or it is a device path (starts with \\.\); it ends with a trailing slash.
file is Nothing.
The file does not exist.
The file is in use by another process, or an I/O error occurs.
The path exceeds the system-defined maximum length.
A file or directory name in the path contains a colon (:) or is in an invalid format.
There is not enough memory to write the string to buffer.
The user lacks necessary permissions to view the path.
Examples
This example reads from the file C:/Documents and Settings/selfportrait.jpg.
My.Computer.FileSystem.ReadAllBytes(
"C:/Documents and Settings/selfportrait.jpg")
Remarks
The ReadAllBytes method of the My.Computer.FileSystem object allows you to read from a binary file. The contents of the file are returned as a byte array.
Do not make decisions about the contents of the file based on the name of the file. For example, the file Form1.vb may not be a Visual Basic source file. Verify all inputs before using the data in your application.
The following table lists an example of a task involving the My.Computer.FileSystem.ReadAllBytes method.
| To | See |
|---|---|
| Read from a binary file | How to: Read From Binary Files in Visual Basic |
