Console.Error 属性
获取标准错误输出流。
**命名空间:**System
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
Public Shared ReadOnly Property Error As TextWriter
用法
Dim value As TextWriter
value = Console.Error
public static TextWriter Error { get; }
public:
static property TextWriter^ Error {
TextWriter^ get ();
}
/** @property */
public static TextWriter get_Error ()
public static function get Error () : TextWriter
属性值
表示标准错误输出流的 TextWriter。
备注
默认情况下，此属性设置为标准错误流。此属性可通过 SetError 方法设置为另一个流。
示例
下面的代码示例演示 Error 属性的用法。
Public Class ExpandTabs
Private Const tabSize As Integer = 4
Private Const usageText As String = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt"
'Entry point which delegates to C-style main Private Function
Public Overloads Shared Sub Main()
System.Environment.ExitCode = Main(System.Environment.GetCommandLineArgs())
End Sub
Overloads Public Shared Function Main(args() As String) As Integer
Dim writer As StreamWriter = Nothing
Dim standardOutput As TextWriter = Console.Out
If args.Length < 3 Then
Console.WriteLine(usageText)
Return 1
End If
Try
writer = New StreamWriter(args(2))
Console.SetOut(writer)
Console.SetIn(New StreamReader(args(1)))
Catch e As IOException
Dim errorWriter As TextWriter = Console.Error
errorWriter.WriteLine(e.Message)
errorWriter.WriteLine(usageText)
Return 1
End Try
Dim i As Integer
i = Console.Read()
While i <> -1
Dim c As Char = Convert.ToChar(i)
If c = ControlChars.Tab Then
Console.Write("".PadRight(tabSize, " "c))
Else
Console.Write(c)
End If
i = Console.Read()
End While
writer.Close()
' Recover the standard output stream so that a
' completion message can be displayed.
Console.SetOut(standardOutput)
Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.", args(0))
Return 0
End Function 'Main
End Class 'ExpandTabs
public class ExpandTabs {
private const int tabSize = 4;
private const string usageText = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt";
public static int Main(string[] args) {
StreamWriter writer = null;
TextWriter standardOutput = Console.Out;
if (args.Length < 2) {
Console.WriteLine(usageText);
return 1;
}
try {
writer = new StreamWriter(args[1]);
Console.SetOut(writer);
Console.SetIn(new StreamReader(args[0]));
}
catch(IOException e) {
TextWriter errorWriter = Console.Error;
errorWriter.WriteLine(e.Message);
errorWriter.WriteLine(usageText);
return 1;
}
int i;
while ((i = Console.Read()) != -1) {
char c = (char)i;
if (c == '\t')
Console.Write(("").PadRight(tabSize, ' '));
else
Console.Write(c);
}
writer.Close();
// Recover the standard output stream so that a
// completion message can be displayed.
Console.SetOut(standardOutput);
Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.", args[0]);
return 0;
}
}
int main()
{
const int tabSize = 4;
array<String^>^args = Environment::GetCommandLineArgs();
String^ usageText = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt";
StreamWriter^ writer = nullptr;
TextWriter^ standardOutput = Console::Out;
if ( args->Length < 3 )
{
Console::WriteLine( usageText );
return 1;
}
try
{
writer = gcnew StreamWriter( args[ 2 ] );
Console::SetOut( writer );
Console::SetIn( gcnew StreamReader( args[ 1 ] ) );
}
catch ( IOException^ e )
{
TextWriter^ errorWriter = Console::Error;
errorWriter->WriteLine( e->Message );
errorWriter->WriteLine( usageText );
return 1;
}
int i;
while ( (i = Console::Read()) != -1 )
{
Char c = (Char)i;
if ( c == '\t' )
Console::Write( ((String^)"")->PadRight( tabSize, ' ' ) );
else
Console::Write( c );
}
writer->Close();
// Recover the standard output stream so that a
// completion message can be displayed.
Console::SetOut( standardOutput );
Console::WriteLine( "EXPANDTABSEX has completed the processing of {0}.", args[ 0 ] );
return 0;
}
public class ExpandTabs
{
private static int tabSize = 4;
private static String usageText =
"Usage: EXPANDTABSEX inputfile.txt outputfile.txt";
public static void main(String[] args)
{
StreamWriter writer = null;
TextWriter standardOutput = Console.get_Out();
if (args.length < 2) {
Console.WriteLine(usageText);
return;
}
try {
writer = new StreamWriter(args[1]);
Console.SetOut(writer);
Console.SetIn(new StreamReader(args[0]));
}
catch (IOException e) {
TextWriter errorWriter = Console.get_Error();
errorWriter.WriteLine(e.get_Message());
errorWriter.WriteLine(usageText);
return;
}
int i;
while (((i = Console.Read()) != -1)) {
char c = (char)(i);
if (c == '\t') {
Console.Write("".PadRight(tabSize, ' '));
}
else {
Console.Write(c);
}
}
writer.Close();
// Recover the standard output stream so that a
// completion message can be displayed.
Console.SetOut(standardOutput);
Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.",
args[0]);
return;
} //main
} //ExpandTabs
public class ExpandTabs {
private static var tabSize : int = 4;
private static var usageText : String = "Usage: EXPANDTABSEX inputfile.txt outputfile.txt";
public static function Main(args : String[]) : int {
var writer : StreamWriter = null;
var standardOutput : TextWriter = Console.Out;
if (args.Length < 2) {
Console.WriteLine(usageText);
return 1;
}
try {
writer = new StreamWriter(args[1]);
Console.SetOut(writer);
Console.SetIn(new StreamReader(args[0]));
}
catch(e : IOException) {
var errorWriter : TextWriter = Console.Error;
errorWriter.WriteLine(e.Message);
errorWriter.WriteLine(usageText);
return 1;
}
var i : int;
while ((i = Console.Read()) != -1) {
var c : char = char(i);
if (c == '\t')
Console.Write(("").PadRight(tabSize, ' '));
else
Console.Write(c);
}
writer.Close();
// Recover the standard output stream so that a
// completion message can be displayed.
Console.SetOut(standardOutput);
Console.WriteLine("EXPANDTABSEX has completed the processing of {0}.", args[0]);
return 0;
}
}
平台
Windows 98、Windows 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
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0