StringWriter Constructors

Initializes a new instance of the StringWriter class.

public:
 StringWriter();

public StringWriter ();

Public Sub New ()

Examples

The following code example demonstrates how to construct a string using the StringWriter class.

using namespace System;
using namespace System::IO;
using namespace System::Text;
int main()
{
   StringWriter^ strWriter = gcnew StringWriter;
   
   // Use the three overloads of the Write method that are 
   // overridden by the StringWriter class.
   strWriter->Write( "file path characters are: " );
   strWriter->Write( Path::InvalidPathChars, 0, Path::InvalidPathChars->Length );
   strWriter->Write( Char::Parse( "." ) );
   
   // Use the underlying StringBuilder for more complex 
   // manipulations of the string.
   strWriter->GetStringBuilder()->Insert( 0, "Invalid " );
   
   Console::WriteLine( "The following string is {0} encoded.\n{1}", strWriter->Encoding->EncodingName, strWriter->ToString() );
   
}

using System;
using System.IO;
using System.Text;

class StrWriter
{
    static void Main()
    {
        StringWriter strWriter  = new StringWriter();

        // Use the three overloads of the Write method that are 
        // overridden by the StringWriter class.
        strWriter.Write("file path characters are: ");
        strWriter.Write(
            Path.InvalidPathChars, 0, Path.InvalidPathChars.Length);
        strWriter.Write('.');

        // Use the underlying StringBuilder for more complex 
        // manipulations of the string.
        strWriter.GetStringBuilder().Insert(0, "Invalid ");

        Console.WriteLine("The following string is {0} encoded.\n{1}", 
            strWriter.Encoding.EncodingName, strWriter.ToString());
    }
}

Imports System.IO
Imports System.Text

Public Class StrWriter

    Shared Sub Main()

        Dim strWriter As StringWriter = new StringWriter()

        ' Use the three overloads of the Write method that are 
        ' overridden by the StringWriter class.
        strWriter.Write("file path characters are: ")
        strWriter.Write( _
            Path.InvalidPathChars, 0, Path.InvalidPathChars.Length)
        strWriter.Write("."C)

        ' Use the underlying StringBuilder for more complex 
        ' manipulations of the string.
        strWriter.GetStringBuilder().Insert(0, "Invalid ")

        Console.WriteLine("The following string is {0} encoded." _
            & vbCrLf & "{1}", _
            strWriter.Encoding.EncodingName, strWriter.ToString())

    End Sub
End Class

Remarks

A new StringBuilder object is automatically created and associated with the new instance of the StringWriter class. Since a format control is not specified for this constructor, the new instance will be initialized with CultureInfo.CurrentCulture.

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.	How to: Write Text to a File
Write to a text file.	How to: Write Text to a File
Read from a text file.	How to: Read Text from a File
Append text to a file.	How to: Open and Append 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.	How to: Read and Write to a Newly Created Data File
Write to a binary file.	How to: Read and Write to a Newly Created Data File

See also

• File and Stream I/O
• How to: Read Text from a File
• How to: Write Text to a File

Initializes a new instance of the StringWriter class with the specified format control.

public:
 StringWriter(IFormatProvider ^ formatProvider);

public StringWriter (IFormatProvider formatProvider);

new System.IO.StringWriter : IFormatProvider -> System.IO.StringWriter

Public Sub New (formatProvider As IFormatProvider)

Parameters

Examples

The following code example demonstrates how to construct a string in a specific culture.

using namespace System;
using namespace System::Globalization;
using namespace System::IO;
int main()
{
   StringWriter^ strWriter = gcnew StringWriter( gcnew CultureInfo(  "ar-DZ" ) );
   strWriter->Write( DateTime::Now );
   
   Console::WriteLine( "Current date and time using the invariant culture: {0}\n"
   "Current date and time using the Algerian culture: {1}", DateTime::Now.ToString(), strWriter->ToString() );
   
}

using System;
using System.Globalization;
using System.IO;

class StrWriter
{
    static void Main()
    {
        StringWriter strWriter = 
            new StringWriter(new CultureInfo("ar-DZ"));

        strWriter.Write(DateTime.Now);

        Console.WriteLine(
            "Current date and time using the invariant culture: {0}\n" +
            "Current date and time using the Algerian culture: {1}", 
            DateTime.Now.ToString(), strWriter.ToString());
    }
}

Imports System.Globalization
Imports System.IO

Public Class StrWriter

    Shared Sub Main()
        Dim strWriter As New StringWriter(New CultureInfo("ar-DZ"))

        strWriter.Write(DateTime.Now)

        Console.WriteLine( _
            "Current date and time using the invariant culture: {0}" _
            & vbCrLf & _
            "Current date and time using the Algerian culture: {1}", _
            DateTime.Now.ToString(), strWriter.ToString())
    End Sub

End Class

Remarks

A new StringBuilder object is automatically created and associated with the new instance of the StringWriter class.

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.	How to: Write Text to a File
Write to a text file.	How to: Write Text to a File
Read from a text file.	How to: Read Text from a File
Append text to a file.	How to: Open and Append 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.	How to: Read and Write to a Newly Created Data File
Write to a binary file.	How to: Read and Write to a Newly Created Data File

See also

• File and Stream I/O
• How to: Read Text from a File
• How to: Write Text to a File

Initializes a new instance of the StringWriter class that writes to the specified StringBuilder.

public:
 StringWriter(System::Text::StringBuilder ^ sb);

public StringWriter (System.Text.StringBuilder sb);

new System.IO.StringWriter : System.Text.StringBuilder -> System.IO.StringWriter

Public Sub New (sb As StringBuilder)

Parameters

Exceptions

Examples

The following code example demonstrates using the StringBuilder class to modify the underlying string in a closed StringWriter.

using namespace System;
using namespace System::IO;
using namespace System::Text;
int main()
{
   StringBuilder^ strBuilder = gcnew StringBuilder( "file path characters are: " );
   StringWriter^ strWriter = gcnew StringWriter( strBuilder );
   strWriter->Write( Path::InvalidPathChars, 0, Path::InvalidPathChars->Length );
   
   strWriter->Close();
   
   // Since the StringWriter is closed, an exception will 
   // be thrown if the Write method is called. However, 
   // the StringBuilder can still manipulate the string.
   strBuilder->Insert( 0, "Invalid " );
   Console::WriteLine( strWriter->ToString() );
   
}

using System;
using System.IO;
using System.Text;

class StrWriter
{
    static void Main()
    {
        StringBuilder strBuilder = 
            new StringBuilder("file path characters are: ");
        StringWriter strWriter = new StringWriter(strBuilder);

        strWriter.Write(
            Path.InvalidPathChars, 0, Path.InvalidPathChars.Length);

        strWriter.Close();

        // Since the StringWriter is closed, an exception will 
        // be thrown if the Write method is called. However, 
        // the StringBuilder can still manipulate the string.
        strBuilder.Insert(0, "Invalid ");
        Console.WriteLine(strWriter.ToString());
    }
}

Imports System.IO
Imports System.Text

Public Class StrWriter

    Shared Sub Main()
        Dim strBuilder As New StringBuilder( _
            "file path characters are: ")
        Dim strWriter As New StringWriter(strBuilder)

        strWriter.Write( _
            Path.InvalidPathChars, 0, Path.InvalidPathChars.Length)

        strWriter.Close()

        ' Since the StringWriter is closed, an exception will 
        ' be thrown if the Write method is called. However, 
        ' the StringBuilder can still manipulate the string.
        strBuilder.Insert(0, "Invalid ")
        Console.WriteLine(strWriter.ToString())
    End Sub

End Class

Remarks

Since a format control is not specified for this constructor, the new instance will be initialized with CultureInfo.CurrentCulture.

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.	How to: Write Text to a File
Write to a text file.	How to: Write Text to a File
Read from a text file.	How to: Read Text from a File
Append text to a file.	How to: Open and Append 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.	How to: Read and Write to a Newly Created Data File
Write to a binary file.	How to: Read and Write to a Newly Created Data File

See also

• File and Stream I/O
• How to: Read Text from a File
• How to: Write Text to a File

Initializes a new instance of the StringWriter class that writes to the specified StringBuilder and has the specified format provider.

public:
 StringWriter(System::Text::StringBuilder ^ sb, IFormatProvider ^ formatProvider);

public StringWriter (System.Text.StringBuilder sb, IFormatProvider formatProvider);

new System.IO.StringWriter : System.Text.StringBuilder * IFormatProvider -> System.IO.StringWriter

Public Sub New (sb As StringBuilder, formatProvider As IFormatProvider)

Parameters

Exceptions

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.	How to: Write Text to a File
Write to a text file.	How to: Write Text to a File
Read from a text file.	How to: Read Text from a File
Append text to a file.	How to: Open and Append 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.	How to: Read and Write to a Newly Created Data File
Write to a binary file.	How to: Read and Write to a Newly Created Data File

See also

• File and Stream I/O
• How to: Read Text from a File
• How to: Write Text to a File