StringBuilder.AppendLine 方法

定義

將預設行結束字元,或是指定字串的複本以及預設行結束字元,附加至這個執行個體的尾端。Appends the default line terminator, or a copy of a specified string and the default line terminator, to the end of this instance.

多載

AppendLine()

將預設行結束字元附加至目前 StringBuilder 物件的尾端。Appends the default line terminator to the end of the current StringBuilder object.

AppendLine(String)

將後面接著預設行結束字元的指定字串複本附加至目前的 StringBuilder 物件結尾。Appends a copy of the specified string followed by the default line terminator to the end of the current StringBuilder object.

AppendLine()

將預設行結束字元附加至目前 StringBuilder 物件的尾端。Appends the default line terminator to the end of the current StringBuilder object.

public:
 System::Text::StringBuilder ^ AppendLine();
public System.Text.StringBuilder AppendLine ();
[System.Runtime.InteropServices.ComVisible(false)]
public System.Text.StringBuilder AppendLine ();
member this.AppendLine : unit -> System.Text.StringBuilder
Public Function AppendLine () As StringBuilder

傳回

完成附加作業之後,這個執行個體的參考。A reference to this instance after the append operation has completed.

屬性

例外狀況

加大此執行個體的值可能會超過 MaxCapacityEnlarging the value of this instance would exceed MaxCapacity.

範例

下列範例示範 AppendLine 方法。The following example demonstrates the AppendLine method.

// This example demonstrates the StringBuilder.AppendLine()
// method.

using namespace System;
using namespace System::Text;

int main()
{
    StringBuilder^ sb = gcnew StringBuilder;
    String^ line = L"A line of text.";
    int number = 123;

    // Append two lines of text.
    sb->AppendLine( L"The first line of text." );
    sb->AppendLine( line );

    // Append a new line, an empty string, and a null cast as a string.
    sb->AppendLine();
    sb->AppendLine( L"" );
    sb->AppendLine( L"" );

    // Append the non-string value, 123, and two new lines.
    sb->Append( number )->AppendLine()->AppendLine();

    // Append two lines of text.
    sb->AppendLine( line );
    sb->AppendLine( L"The last line of text." );

    // Convert the value of the StringBuilder to a string and display the string.
    Console::WriteLine( sb );

    return 0;
}

/*
This example produces the following results:

The first line of text.
A line of text.



123

A line of text.
The last line of text.
*/
// This example demonstrates the StringBuilder.AppendLine() 
// method.

using System;
using System.Text;

class Sample 
{
    public static void Main() 
    {
    StringBuilder sb = new StringBuilder();
    string        line = "A line of text.";
    int           number = 123;

// Append two lines of text.
    sb.AppendLine("The first line of text.");
    sb.AppendLine(line);

// Append a new line, an empty string, and a null cast as a string.
    sb.AppendLine();
    sb.AppendLine("");
    sb.AppendLine((string)null);

// Append the non-string value, 123, and two new lines.
    sb.Append(number).AppendLine().AppendLine();

// Append two lines of text.
    sb.AppendLine(line);
    sb.AppendLine("The last line of text.");

// Convert the value of the StringBuilder to a string and display the string.
    Console.WriteLine(sb.ToString());
    }
}
/*
This example produces the following results:

The first line of text.
A line of text.



123

A line of text.
The last line of text.
*/
' This example demonstrates the StringBuilder.AppendLine() 
' method.
Imports System.Text

Class Sample
   Public Shared Sub Main()
      Dim sb As New StringBuilder()
      Dim line As String = "A line of text."
      Dim number As Integer = 123
      
      ' Append two lines of text.
      sb.AppendLine("The first line of text.")
      sb.AppendLine(line)
      
      ' Append a new line, an empty string, and a null cast as a string.
      sb.AppendLine()
      sb.AppendLine("")
      sb.AppendLine(CStr(Nothing))
      
      ' Append the non-string value, 123, and two new lines.
      sb.Append(number).AppendLine().AppendLine()
      
      ' Append two lines of text.
      sb.AppendLine(line)
      sb.AppendLine("The last line of text.")
      
      ' Convert the value of the StringBuilder to a string and display the string.
      Console.WriteLine(sb.ToString())
   End Sub
End Class
'
'This example produces the following results:
'
'The first line of text.
'A line of text.
'
'
'
'123
'
'A line of text.
'The last line of text.

備註

預設行結束字元是 Environment.NewLine 屬性的目前值。The default line terminator is the current value of the Environment.NewLine property.

這個實例的容量會視需要調整。The capacity of this instance is adjusted as needed.

給呼叫者的注意事項

在 .NET Core 和 .NET Framework 4.0 和更新版本中,當您藉由呼叫 StringBuilder(Int32, Int32) 的函式來具現化 StringBuilder 物件時,StringBuilder 實例的長度和容量都可以成長超過其 MaxCapacity 屬性的值。In .NET Core and in the .NET Framework 4.0 and later versions, when you instantiate the StringBuilder object by calling the StringBuilder(Int32, Int32) constructor, both the length and the capacity of the StringBuilder instance can grow beyond the value of its MaxCapacity property. 當您呼叫 Append(String)AppendFormat(String, Object) 方法來附加小型字串時,就會發生這種情況。This can occur particularly when you call the Append(String) and AppendFormat(String, Object) methods to append small strings.

另請參閱

AppendLine(String)

將後面接著預設行結束字元的指定字串複本附加至目前的 StringBuilder 物件結尾。Appends a copy of the specified string followed by the default line terminator to the end of the current StringBuilder object.

public:
 System::Text::StringBuilder ^ AppendLine(System::String ^ value);
public System.Text.StringBuilder AppendLine (string value);
[System.Runtime.InteropServices.ComVisible(false)]
public System.Text.StringBuilder AppendLine (string value);
member this.AppendLine : string -> System.Text.StringBuilder
Public Function AppendLine (value As String) As StringBuilder

參數

value
String

要附加的字串。The string to append.

傳回

完成附加作業之後,這個執行個體的參考。A reference to this instance after the append operation has completed.

屬性

例外狀況

加大此執行個體的值可能會超過 MaxCapacityEnlarging the value of this instance would exceed MaxCapacity.

備註

預設行結束字元是 Environment.NewLine 屬性的目前值。The default line terminator is the current value of the Environment.NewLine property.

這個實例的容量會視需要調整。The capacity of this instance is adjusted as needed.

給呼叫者的注意事項

在 .NET Core 和 .NET Framework 4.0 和更新版本中,當您藉由呼叫 StringBuilder(Int32, Int32) 的函式來具現化 StringBuilder 物件時,StringBuilder 實例的長度和容量都可以成長超過其 MaxCapacity 屬性的值。In .NET Core and in the .NET Framework 4.0 and later versions, when you instantiate the StringBuilder object by calling the StringBuilder(Int32, Int32) constructor, both the length and the capacity of the StringBuilder instance can grow beyond the value of its MaxCapacity property. 當您呼叫 Append(String)AppendFormat(String, Object) 方法來附加小型字串時,就會發生這種情況。This can occur particularly when you call the Append(String) and AppendFormat(String, Object) methods to append small strings.

另請參閱

適用於