StringWriter Class
Assembly: mscorlib (in mscorlib.dll)
[SerializableAttribute] [ComVisibleAttribute(true)] public ref class StringWriter : public TextWriter
/** @attribute SerializableAttribute() */ /** @attribute ComVisibleAttribute(true) */ public class StringWriter extends TextWriter
SerializableAttribute ComVisibleAttribute(true) public class StringWriter extends TextWriter
Not applicable.
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. | |
| Write to a text file. | |
| Read from a text file. | |
| Append text to a file. | |
| Get the size of a file. | |
| Get the attributes of a file. | |
| Set the attributes of a file. | |
| Determine if a file exists. | |
| Read from a binary file. | |
| Write to a binary file. |
The following code example demonstrates the creation of a continuous paragraph from a group of double-spaced sentences, and then the conversion of the paragraph back to the original text.
using namespace System; using namespace System::IO; int main() { String^ textReaderText = "TextReader is the abstract base " "class of StreamReader and StringReader, which read " "characters from streams and strings, respectively.\n\n" "Create an instance of TextReader to open a text file " "for reading a specified range of characters, or to " "create a reader based on an existing stream.\n\n" "You can also use an instance of TextReader to read " "text from a custom backing store using the same " "APIs you would use for a string or a stream.\n\n"; Console::WriteLine( "Original text:\n\n{0}", textReaderText ); // From textReaderText, create a continuous paragraph // with two spaces between each sentence. String^ aLine; String^ aParagraph; StringReader^ strReader = gcnew StringReader( textReaderText ); while ( true ) { aLine = strReader->ReadLine(); if ( aLine != nullptr ) { aParagraph = String::Concat( aParagraph, aLine, " " ); } else { aParagraph = String::Concat( aParagraph, "\n" ); break; } } Console::WriteLine( "Modified text:\n\n{0}", aParagraph ); // Re-create textReaderText from aParagraph. int intCharacter; Char convertedCharacter; StringWriter^ strWriter = gcnew StringWriter; strReader = gcnew StringReader( aParagraph ); while ( true ) { intCharacter = strReader->Read(); // Check for the end of the string // before converting to a character. if ( intCharacter == -1 ) break; convertedCharacter = Convert::ToChar( intCharacter ); if ( convertedCharacter == '.' ) { strWriter->Write( ".\n\n" ); // Bypass the spaces between sentences. strReader->Read(); strReader->Read(); } else { strWriter->Write( convertedCharacter ); } } Console::WriteLine( "\nOriginal text:\n\n{0}", strWriter->ToString() ); }
import System.*;
import System.IO.*;
class StringRW
{
public static void main(String[] args)
{
String textReaderText = "TextReader is the abstract base "
+ "class of StreamReader and StringReader, which read "
+ "characters from streams and strings, respectively.\n\n"
+ "Create an instance of TextReader to open a text file "
+ "for reading a specified range of characters, or to "
+ "create a reader based on an existing stream.\n\n"
+ "You can also use an instance of TextReader to read "
+ "text from a custom backing store using the same "
+ "APIs you would use for a string or a stream.\n\n";
Console.WriteLine("Original text:\n\n{0}", textReaderText);
// From textReaderText, create a continuous paragraph
// with two spaces between each sentence.
String aParagraph = "";
String aLine;
StringReader strReader = new StringReader(textReaderText);
while (true) {
aLine = strReader.ReadLine();
if (aLine != null) {
aParagraph = aParagraph + aLine + " ";
}
else {
aParagraph = aParagraph + "\n";
break ;
}
}
Console.WriteLine("Modified text:\n\n{0}", aParagraph);
// Re-create textReaderText from aParagraph.
int intCharacter;
char convertedCharacter;
StringWriter strWriter = new StringWriter();
strReader = new StringReader(aParagraph);
while (true) {
intCharacter = strReader.Read();
// Check for the end of the string
// before converting to a character.
if (intCharacter == -1) {
break ;
}
convertedCharacter = Convert.ToChar(intCharacter);
if (convertedCharacter == '.') {
strWriter.Write(".\n\n");
// Bypass the spaces between sentences.
strReader.Read();
strReader.Read();
}
else {
strWriter.Write(convertedCharacter);
}
}
Console.WriteLine("\nOriginal text:\n\n{0}", strWriter.ToString());
} //main
} //StringRW
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.