String.Length 属性
获取此实例中的字符数。
**命名空间:**System
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
Public ReadOnly Property Length As Integer
用法
Dim instance As String
Dim value As Integer
value = instance.Length
public int Length { get; }
public:
property int Length {
int get ();
}
/** @property */
public int get_Length ()
public function get Length () : int
属性值
此实例中的字符数。
备注
Length 属性返回此实例中 Char 对象的个数，而不是 Unicode 字符个数。原因在于一个 Unicode 字符可能会用多个 Char 表示。使用 System.Globalization.StringInfo 类来处理每个 Unicode 字符而不是每个 Char。
示例
下面的代码示例演示了 Length 属性。
' Sample for String.Length
Imports System
Class Sample
Public Shared Sub Main()
Dim str As String = "abcdefg"
Console.WriteLine("1) The length of '{0}' is {1}", str, str.Length)
Console.WriteLine("2) The length of '{0}' is {1}", "xyz", "xyz".Length)
End Sub 'Main
End Class 'Sample
'
'This example produces the following results:
'1) The length of 'abcdefg' is 7
'2) The length of 'xyz' is 3
'
// Sample for String.Length
using System;
class Sample
{
public static void Main()
{
string str = "abcdefg";
Console.WriteLine("1) The length of '{0}' is {1}", str, str.Length);
Console.WriteLine("2) The length of '{0}' is {1}", "xyz", "xyz".Length);
}
}
/*
This example produces the following results:
1) The length of 'abcdefg' is 7
2) The length of 'xyz' is 3
*/
// Sample for String::Length
using namespace System;
int main()
{
String^ str = "abcdefg";
Console::WriteLine( "1) The length of '{0}' is {1}", str, str->Length );
Console::WriteLine( "2) The length of '{0}' is {1}", "xyz", ((String^)"xyz")->Length );
}
/*
This example produces the following results:
1) The length of 'abcdefg' is 7
2) The length of 'xyz' is 3
*/
// Sample for String.Length
import System.*;
class Sample
{
public static void main(String[] args)
{
String str = "abcdefg";
Console.WriteLine("1) The length of '{0}' is {1}", str,
(Int32)str.get_Length());
Console.WriteLine("2) The length of '{0}' is {1}", "xyz",
(Int32)"xyz".get_Length());
} //main
} //Sample
/*
This example produces the following results:
1) The length of 'abcdefg' is 7
2) The length of 'xyz' is 3
*/
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、1.0