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BinaryWriter.Write Method (Char[])

.NET Framework 1.1

Writes a character array to the current stream and advances the current position of the stream in accordance with the Encoding used and the specific characters being written to the stream.

[Visual Basic]
Overloads Public Overridable Sub Write( _
   ByVal chars() As Char _
)
[C#]
public virtual void Write(
 char[] chars
);
[C++]
public: virtual void Write(
 __wchar_t chars __gc[]
);
[JScript]
public function Write(
   chars : Char[]
);

Parameters

chars
A character array containing the data to write.

Exceptions

Exception Type Condition
ArgumentNullException chars is a null reference (Nothing in Visual Basic).
ObjectDisposedException The stream is closed.
IOException An I/O error occurs.

Remarks

The following table lists examples of other typical or related I/O tasks.

To do this... See the example in this topic...
Create a text file. Writing Text to a File
Write to a text file. Writing Text to a File
Read from a text file. Reading Text from a File
Append text to a file. Opening and Appending to a Log File

File.AppendText

FileInfo.AppendText

Get the size of a file. FileInfo.Length
Get the attributes of a file. File.GetAttributes
Set the attributes of a file. File.SetAttributes
Determine if a file exists. File.Exists
Read from a binary file. Reading and Writing to a Newly Created Data File
Write to a binary file. Reading and Writing to a Newly Created Data File

Example

[Visual Basic, C#, C++] The following code example shows how to read and write data using memory as a backing store.

[Visual Basic] 
Imports System
Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Dim invalidPathChars() As Char = Path.InvalidPathChars
        Dim memStream As new MemoryStream()
        Dim binWriter As New BinaryWriter(memStream)

        ' Write to memory.
        binWriter.Write("Invalid file path characters are: ")
        binWriter.Write(Path.InvalidPathChars)

        ' Create the reader using the same MemoryStream 
        ' as used with the writer.
        Dim binReader As New BinaryReader(memStream)

        ' Set Position to the beginning of the stream.
        memStream.Position = 0

        ' Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString())
        Console.WriteLine(binReader.ReadChars( _
            CInt(memStream.Length - memStream.Position)))
    
    End Sub
End Class

[C#] 
using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        char[] invalidPathChars = Path.InvalidPathChars;
        MemoryStream memStream = new MemoryStream();
        BinaryWriter binWriter = new BinaryWriter(memStream);

        // Write to memory.
        binWriter.Write("Invalid file path characters are: ");
        binWriter.Write(Path.InvalidPathChars);

        // Create the reader using the same MemoryStream 
        // as used with the writer.
        BinaryReader binReader = new BinaryReader(memStream);

        // Set Position to the beginning of the stream.
        memStream.Position = 0;

        // Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString());
        Console.WriteLine(binReader.ReadChars(
            (int)(memStream.Length - memStream.Position)));
    }
}

[C++] 
#using <mscorlib.dll>
using namespace System;
using namespace System::IO;

void main()
{
    Char invalidPathChars __gc[] = Path::InvalidPathChars;
    MemoryStream* memStream = new MemoryStream();
    BinaryWriter* binWriter = new BinaryWriter(memStream);

    // Write to memory.
    binWriter->Write(S"Invalid file path characters are: ");
    binWriter->Write(Path::InvalidPathChars);

    // Create the reader using the same MemoryStream 
    // as used with the writer.
    BinaryReader* binReader = new BinaryReader(memStream);

    // Set Position to the beginning of the stream.
    binReader->BaseStream->Position = 0;

    // Read the data from memory and write it to the console.
    Console::Write(binReader->ReadString());
    Console::WriteLine(binReader->ReadChars(
        (int)(memStream->Length - memStream->Position)));
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

See Also

BinaryWriter Class | BinaryWriter Members | System.IO Namespace | BinaryWriter.Write Overload List | Encoding | Working with I/O | Reading Text from a File | Writing Text to a File

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