IPAddress.Parse 方法

public:
 static System::Net::IPAddress ^ Parse(System::String ^ ipString);

public static System.Net.IPAddress Parse(string ipString);

static member Parse : string -> System.Net.IPAddress

Public Shared Function Parse (ipString As String) As IPAddress

参数

返回

实例 IPAddress 。

例外

示例

下面的代码将包含 IP 地址的字符串（IPv4 的点四边表示法或 IPv6 的冒号十六进制表示法）转换为类的 IPAddress 实例。 然后，它使用重载 ToString 的方法以标准表示法显示地址。

using System;
using System.Net;

class ParseAddress
{

  private static void Main(string[] args)
  {
    string IPaddress;

    if (args.Length == 0)
    {
      Console.WriteLine("Please enter an IP address.");
      Console.WriteLine("Usage:   >cs_parse any IPv4 or IPv6 address.");
      Console.WriteLine("Example: >cs_parse 127.0.0.1");
      Console.WriteLine("Example: >cs_parse 0:0:0:0:0:0:0:1");
      return;
    }
    else
        {
            IPaddress = args[0];
        }

        // Get the list of the IPv6 addresses associated with the requested host.
        Parse(IPaddress);
  }

  // This method calls the IPAddress.Parse method to check the ipAddress
  // input string. If the ipAddress argument represents a syntatically correct IPv4 or
  // IPv6 address, the method displays the Parse output into quad-notation or
  // colon-hexadecimal notation, respectively. Otherwise, it displays an
  // error message.
  private static void Parse(string ipAddress)
  {
    try
    {
      // Create an instance of IPAddress for the specified address string (in
      // dotted-quad, or colon-hexadecimal notation).
      IPAddress address = IPAddress.Parse(ipAddress);

      // Display the address in standard notation.
      Console.WriteLine("Parsing your input string: " + "\"" + ipAddress + "\"" + " produces this address (shown in its standard notation): "+ address.ToString());
    }

    catch(ArgumentNullException e)
    {
      Console.WriteLine("ArgumentNullException caught!!!");
      Console.WriteLine("Source : " + e.Source);
      Console.WriteLine("Message : " + e.Message);
    }

    catch(FormatException e)
    {
      Console.WriteLine("FormatException caught!!!");
      Console.WriteLine("Source : " + e.Source);
      Console.WriteLine("Message : " + e.Message);
    }

    catch(Exception e)
    {
      Console.WriteLine("Exception caught!!!");
      Console.WriteLine("Source : " + e.Source);
      Console.WriteLine("Message : " + e.Message);
    }
   }
}

Imports System.Net



Class ParseAddress
   
   'Entry point which delegates to C-style main Private Function
   Public Overloads Shared Sub Main()
      Main(System.Environment.GetCommandLineArgs())
   End Sub
   
   
   Overloads Private Shared Sub Main(args() As String)
      Dim IPaddress As String
      
      If args.Length = 1 Then
         Console.WriteLine("Please enter an IP address.")
         Console.WriteLine("Usage:   >cs_parse any IPv4 or IPv6 address.")
         Console.WriteLine("Example: >cs_parse 127.0.0.1")
         Console.WriteLine("Example: >cs_parse 0:0:0:0:0:0:0:1")
         Return
      Else
         IPaddress = args(1)
      End If 
      ' Get the list of the IPv6 addresses associated with the requested host.
      Parse(IPaddress)
   End Sub
    
   
   ' This method calls the IPAddress.Parse method to check the ipAddress 
   ' input string. If the ipAddress argument represents a syntatical correct IPv4 or
   ' IPv6 address, the method displays the Parse output into quad-notation or
   ' colon-hexadecimal notation, respectively. Otherwise, it displays an 
   ' error message.
   Private Shared Sub Parse(ipAddr As String)
      Try
         ' Create an instance of IPAddress for the specified address string (in 
         ' dotted-quad, or colon-hexadecimal notation).
         Dim address As IPAddress = IPAddress.Parse(ipAddr)
         
         ' Display the address in standard notation.
         Console.WriteLine(("Parsing your input string: " + """" + ipAddr + """" + " produces this address (shown in its standard notation): " + address.ToString()))
      
      Catch e As ArgumentNullException
         Console.WriteLine("ArgumentNullException caught!!!")
         Console.WriteLine(("Source : " + e.Source))
         Console.WriteLine(("Message : " + e.Message))
      
      Catch e As FormatException
         Console.WriteLine("FormatException caught!!!")
         Console.WriteLine(("Source : " + e.Source))
         Console.WriteLine(("Message : " + e.Message))
      
      Catch e As Exception
         Console.WriteLine("Exception caught!!!")
         Console.WriteLine(("Source : " + e.Source))
         Console.WriteLine(("Message : " + e.Message))
      End Try
   End Sub
End Class

注解

静态 Parse 方法从 IPv4 的点象表示法和 IPv6 的冒号十六进制表示法表示的 IP 地址创建 IPAddress 实例。

确定 IP 地址的构造方式时（每个部分都用句点分隔） ipString 的数目。 一部分地址直接存储在网络地址中。 一个两部分地址，方便指定类 A 地址，将前导部分置于第一个字节中，并将尾随部分置于网络地址最右侧的三个字节中。 一个三部分地址，方便指定类 B 地址，将第一个部分放在第一个字节中，第二个部分放在第二个字节中，最后一部分放在网络地址最右侧的两个字节中。 例如：

public:
 static System::Net::IPAddress ^ Parse(ReadOnlySpan<char> ipString);

public static System.Net.IPAddress Parse(ReadOnlySpan<char> ipString);

static member Parse : ReadOnlySpan<char> -> System.Net.IPAddress

Public Shared Function Parse (ipString As ReadOnlySpan(Of Char)) As IPAddress

参数

返回

转换后的 IP 地址。

例外