Trace.WriteLine 方法

参考

定义

命名空间:: System.Diagnostics

程序集:: System.Diagnostics.TraceSource.dll

程序集:: System.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

将有关跟踪的信息写入 Listeners 集合中的跟踪侦听器。

重载

WriteLine(Object)	将对象的 ToString() 方法的值写入 Listeners 集合中的跟踪侦听器。
WriteLine(String)	将消息写入 Listeners 集合中的跟踪侦听器。
WriteLine(Object, String)	将类别名称和对象的 ToString() 方法的值写入 Listeners 集合中的跟踪侦听器。
WriteLine(String, String)	将类别名称和消息写入 Listeners 集合中的跟踪侦听器。

WriteLine(Object)

Source:: Trace.cs

Source:: Trace.cs

Source:: Trace.cs

将对象的 ToString() 方法的值写入 Listeners 集合中的跟踪侦听器。

public:
 static void WriteLine(System::Object ^ value);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (object? value);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (object value);

[<System.Diagnostics.Conditional("TRACE")>]
static member WriteLine : obj -> unit

Public Shared Sub WriteLine (value As Object)

参数

value: Object

一个 Object，其名称将发送到 Listeners。

属性: ConditionalAttribute

示例

以下示例创建一个名为 generalSwitch的 TraceSwitch。此开关在代码示例外部设置。

如果开关设置为 TraceLevelError 或更高版本，则本示例将第一条错误消息输出到 Listeners。有关向 Listeners 集合添加侦听器的信息，请参阅 TraceListenerCollection 类。

然后，如果 TraceLevel 设置为 Verbose，则示例将在与第一条消息相同的行上输出对象的名称。第二条消息后跟行终止符。

// Class-level declaration.
// Create a TraceSwitch.
private:
   static TraceSwitch^ generalSwitch = 
      gcnew TraceSwitch( "General", "Entire Application" );

public:
   static void MyErrorMethod( Object^ myObject )
   {
      #if defined(TRACE)
      // Write the message if the TraceSwitch level 
      // is set to Error or higher.
      if ( generalSwitch->TraceError )
      {
         Trace::Write( "Invalid object. " );
      }
      
      // Write a second message if the TraceSwitch level
      // is set to Verbose.
      if ( generalSwitch->TraceVerbose )
      {
         Trace::WriteLine( myObject );
      }
      #endif
   }

// Class-level declaration.
 // Create a TraceSwitch.
 static TraceSwitch generalSwitch = new TraceSwitch("General", "Entire Application");

 static public void MyErrorMethod(Object myObject) {
    // Write the message if the TraceSwitch level is set to Error or higher.
    if(generalSwitch.TraceError)
       Trace.Write("Invalid object. ");

    // Write a second message if the TraceSwitch level is set to Verbose.
    if(generalSwitch.TraceVerbose)
       Trace.WriteLine(myObject);
 }

' Class-level declaration.
' Create a TraceSwitch.
Private Shared generalSwitch As New TraceSwitch("General", "Entire Application")

Public Shared Sub MyErrorMethod(myObject As Object)
    ' Write the message if the TraceSwitch level is set to Error or higher.
    If generalSwitch.TraceError Then
        Trace.Write("Invalid object. ")
    End If 
    ' Write a second message if the TraceSwitch level is set to Verbose.
    If generalSwitch.TraceVerbose Then
        Trace.WriteLine(myObject)
    End If
End Sub

注解

默认情况下，输出将写入 DefaultTraceListener实例。

此方法调用跟踪侦听器的 WriteLine 方法。

另请参阅

适用于

WriteLine(String)

Source:: Trace.cs

Source:: Trace.cs

Source:: Trace.cs

将消息写入 Listeners 集合中的跟踪侦听器。

public:
 static void WriteLine(System::String ^ message);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (string? message);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (string message);

[<System.Diagnostics.Conditional("TRACE")>]
static member WriteLine : string -> unit

Public Shared Sub WriteLine (message As String)

参数

message: String

要写入的消息。

属性: ConditionalAttribute

示例

以下示例创建一个名为 generalSwitch的 TraceSwitch。此开关在代码示例外部设置。

然后，如果 TraceLevel 设置为 Verbose，则该示例将输出第二条错误消息，该错误消息与第一条消息位于同一行。第二条消息后跟行终止符。

// Class-level declaration.
// Create a TraceSwitch.
private:
   static TraceSwitch^ generalSwitch = 
      gcnew TraceSwitch( "General", "Entire Application" );

public:
   static void MyErrorMethod()
   {
      // Write the message if the TraceSwitch level is set
      // to Error or higher.
      if ( generalSwitch->TraceError )
      {
         Trace::Write( "My error message. " );
      }
      
      // Write a second message if the TraceSwitch level is set
      // to Verbose.
      if ( generalSwitch->TraceVerbose )
      {
          Trace::WriteLine( "My second error message." );
      }
   }

// Class-level declaration.
 // Create a TraceSwitch.
 static TraceSwitch generalSwitch = new TraceSwitch("General", "Entire Application");

 static public void MyErrorMethod() {
    // Write the message if the TraceSwitch level is set to Error or higher.
    if(generalSwitch.TraceError)
       Trace.Write("My error message. ");

    // Write a second message if the TraceSwitch level is set to Verbose.
    if(generalSwitch.TraceVerbose)
       Trace.WriteLine("My second error message.");
 }

' Class-level declaration.
' Create a TraceSwitch.
Private Shared generalSwitch As New TraceSwitch("General", "Entire Application")    

Public Shared Sub MyErrorMethod()
    ' Write the message if the TraceSwitch level is set to Error or higher.
    If generalSwitch.TraceError Then
        Trace.Write("My error message. ")
    End If 
    ' Write a second message if the TraceSwitch level is set to Verbose.
    If generalSwitch.TraceVerbose Then
        Trace.WriteLine("My second error message.")
    End If
End Sub

注解

默认情况下，输出将写入 DefaultTraceListener实例。

此方法调用跟踪侦听器的 WriteLine 方法。

另请参阅

适用于

WriteLine(Object, String)

Source:: Trace.cs

Source:: Trace.cs

Source:: Trace.cs

将类别名称和对象的 ToString() 方法的值写入 Listeners 集合中的跟踪侦听器。

public:
 static void WriteLine(System::Object ^ value, System::String ^ category);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (object? value, string? category);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (object value, string category);

[<System.Diagnostics.Conditional("TRACE")>]
static member WriteLine : obj * string -> unit

Public Shared Sub WriteLine (value As Object, category As String)

参数

value: Object

一个 Object，其名称将发送到 Listeners。

category: String

用于组织输出的类别名称。

属性: ConditionalAttribute

示例

以下示例创建一个名为 generalSwitch的 TraceSwitch。此开关在代码示例外部设置。

然后，如果 TraceLevel 设置为 Verbose，则该示例将输出第二条错误消息，该错误消息与第一条消息位于同一行。第二条消息后跟行终止符。

// Class-level declaration.
// Create a TraceSwitch.
private:
   static TraceSwitch^ generalSwitch = 
      gcnew TraceSwitch( "General", "Entire Application" );

public:
   static void MyErrorMethod( Object^ myObject, String^ category )
   {
      #if defined(TRACE)
      // Write the message if the TraceSwitch level 
      // is set to Error or higher.
      if ( generalSwitch->TraceError )
      {
         Trace::Write( "Invalid object for category. " );
      }
      
      // Write a second message if the TraceSwitch level
      // is set to Verbose.
      if ( generalSwitch->TraceVerbose )
      {
         Trace::WriteLine( myObject, category );
      }
      #endif
   }

// Class-level declaration.
 // Create a TraceSwitch.
 static TraceSwitch generalSwitch = new TraceSwitch("General", "Entire Application");

 static public void MyErrorMethod(Object myObject, string category) {
    // Write the message if the TraceSwitch level is set to Error or higher.
    if(generalSwitch.TraceError)
       Trace.Write("Invalid object for category. ");

    // Write a second message if the TraceSwitch level is set to Verbose.
    if(generalSwitch.TraceVerbose)
       Trace.WriteLine(myObject, category);
 }

' Class-level declaration.
' Create a TraceSwitch.
Private Shared generalSwitch As New TraceSwitch("General", "Entire Application")

Public Shared Sub MyErrorMethod(myObject As Object, category As String)
    ' Write the message if the TraceSwitch level is set to Error or higher.
    If generalSwitch.TraceError Then
        Trace.Write("Invalid object for category. ")
    End If 
    ' Write a second message if the TraceSwitch level is set to Verbose.
    If generalSwitch.TraceVerbose Then
        Trace.WriteLine(myObject, category)
    End If
End Sub

注解

默认情况下，输出将写入 DefaultTraceListener实例。

category 参数可用于对输出消息进行分组。

此方法调用跟踪侦听器的 WriteLine 方法。

另请参阅

适用于

WriteLine(String, String)

Source:: Trace.cs

Source:: Trace.cs

Source:: Trace.cs

将类别名称和消息写入 Listeners 集合中的跟踪侦听器。

public:
 static void WriteLine(System::String ^ message, System::String ^ category);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (string? message, string? category);

[System.Diagnostics.Conditional("TRACE")]
public static void WriteLine (string message, string category);

[<System.Diagnostics.Conditional("TRACE")>]
static member WriteLine : string * string -> unit

Public Shared Sub WriteLine (message As String, category As String)

参数

message: String

要写入的消息。

category: String

用于组织输出的类别名称。

属性: ConditionalAttribute

示例

以下示例创建一个名为 generalSwitch的 TraceSwitch。此开关在代码示例外部设置。

然后，如果 TraceLevel 设置为 Verbose，则该示例将输出第二条错误消息，并在第一条消息所在的同一行上输出 category。第二条消息后跟行终止符。

// Class-level declaration.
// Create a TraceSwitch.
private:
   static TraceSwitch^ generalSwitch = 
      gcnew TraceSwitch( "General", "Entire Application" );

public:
   static void MyErrorMethod( String^ category )
   {
      #if defined(TRACE)
      // Write the message if the TraceSwitch level 
      // is set to Error or higher.
      if ( generalSwitch->TraceError )
      {
         Trace::Write( "My error message. " );
      }
      
      // Write a second message if the TraceSwitch level
      // is set to Verbose.
      if ( generalSwitch->TraceVerbose )
      {
         Trace::WriteLine( "My second error message.", category );
      }
      #endif
   }

// Class-level declaration.
 // Create a TraceSwitch.
 static TraceSwitch generalSwitch = new TraceSwitch("General", "Entire Application");

 static public void MyErrorMethod(string category) {
    // Write the message if the TraceSwitch level is set to Error or higher.
    if(generalSwitch.TraceError)
       Trace.Write("My error message. ");

    // Write a second message if the TraceSwitch level is set to Verbose.
    if(generalSwitch.TraceVerbose)
       Trace.WriteLine("My second error message.", category);
 }

' Class-level declaration.
' Create a TraceSwitch.
Private Shared generalSwitch As New TraceSwitch("General", "Entire Application")

Public Shared Sub MyErrorMethod(category As String)
    ' Write the message if the TraceSwitch level is set to Error or higher.
    If generalSwitch.TraceError Then
        Trace.Write("My error message. ")
    End If 
    ' Write a second message if the TraceSwitch level is set to Verbose.
    If generalSwitch.TraceVerbose Then
        Trace.WriteLine("My second error message.", category)
    End If
End Sub

注解

默认情况下，输出将写入 DefaultTraceListener实例。

category 参数可用于对输出消息进行分组。

此方法调用跟踪侦听器的 WriteLine 方法。

另请参阅

适用于

通过

Trace.WriteLine 方法

定义

重载

WriteLine(Object)

参数

示例

注解

另请参阅

适用于

WriteLine(String)

参数

示例

注解

另请参阅

适用于

WriteLine(Object, String)

参数

示例

注解

另请参阅

适用于

WriteLine(String, String)

参数

示例

注解

另请参阅

适用于

其他资源