PhysicalAddress.None 字段

定义

返回一个具有零长度地址的新 PhysicalAddress 实例。Returns a new PhysicalAddress instance with a zero length address. 此字段为只读。This field is read-only.

public: static initonly System::Net::NetworkInformation::PhysicalAddress ^ None;
public static readonly System.Net.NetworkInformation.PhysicalAddress None;
 staticval mutable None : System.Net.NetworkInformation.PhysicalAddress
Public Shared ReadOnly None As PhysicalAddress 

字段值

PhysicalAddress

示例

下面的代码示例演示如何使用此字段来测试地址分析的结果。The following code example demonstrates using this field to test the result of parsing an address.

PhysicalAddress^ StrictParseAddress( String^ address )
{
   PhysicalAddress^ newAddress = PhysicalAddress::Parse( address );
   if ( PhysicalAddress::None->Equals( newAddress ) )
      return nullptr;

   return newAddress;
}


public static PhysicalAddress StrictParseAddress(string address)
{
    PhysicalAddress newAddress = PhysicalAddress.Parse(address);
    if (PhysicalAddress.None.Equals(newAddress))
        return null;

    return newAddress;
}

注解

Parse如果指定 address,则该方法返回 None nullThe Parse method returns None if you specify null address.

适用于