在Framework 4.0中:找出新增的方法與新增的類(二)

2020-01-24 03:21:01

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問題描述：在Framework 4.0中:找出新增的方法與新增的類(一)

為什么動態加載程序集無法找出Framework 4.0 和Framwork2.0 新增的方法和類？

因為控制臺程序默認就添加了Framework4.0的程序集，當你使用Object，Type，string這些類的時候就已經在使用已經加載的程序集了，而clr不會重復的去加載程序集？？，這點記不清了。
所以V2Assembly 和v4Assembly都是Framework4.0的Assembly。

驗證：

復制代碼代碼如下:

static void Main(string[] args)
{
    Assembly assemblyV2 = Assembly.LoadFile(
                        @"C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll");
    Assembly assemblyV4 = Assembly.LoadFile(
                        @"C:/WINDOWS/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll");
    Console.WriteLine("V2的名稱{0}/nV4的名稱{1}", assemblyV2.FullName, assemblyV4.FullName);
    Console.ReadLine();
}

輸出如下：

因為mscorlib.dll 是在Share Domain中的程序集，所以在同一應用程序中無法加載兩個不同的mscorlib.dll.所以考慮使用兩個應用程序，一個Framework 2.0,另一個Framework 4.0。

于是可以換個思路:使用2.0的framework來創建的程序來調用framework4.0的WCF服務。

代碼結構如下：

V4NewLooker是基于framework 2.0的Winform程序

V4WcfService是基于framework 4.0 的WCF服務。

接口的定義如下：

復制代碼代碼如下:

namespace V4WcfService
{
    // 注意: 使用“重構”菜單上的“重命名”命令，可以同時更改代碼和配置文件中的接口名“IService1”。
    [ServiceContract]
    public interface IService1
    {
        [OperationContract]
        List<TypeMembers> GetNewTypeMember(List<TypeMembers> lstOldTypes);
    }
    [DataContract]
    public class TypeMembers
    {
        [DataMember]
        public string FullName { get; set; }
        [DataMember]
        public List<string> MemberNames { get; set; }
    }
}

服務實現代碼如下：

復制代碼代碼如下:

namespace V4WcfService
{
    // 注意: 使用“重構”菜單上的“重命名”命令，可以同時更改代碼、svc 和配置文件中的類名“Service1”。
    public class Service1 : IService1
    {
        public List<TypeMembers> GetNewTypeMember(List<TypeMembers> lstOldTypes)
        {
            List<TypeMembers> result = new List<TypeMembers>();
            Assembly mscorlibAssembly = typeof(object).Assembly;
            Type[] v4Types = mscorlibAssembly.GetTypes();
            #region 所有更新的Type
            foreach (TypeMembers v3Type in lstOldTypes)
            {
                Type v4Type = v4Types.FirstOrDefault(t => t.FullName == v3Type.FullName);

                if (v4Type != null && !v4Type.IsEnum)
                {
                    MemberInfo[] v4Mis = v4Type.GetMembers();
                    if (v4Mis.Length != v3Type.MemberNames.Count)
                    {
MemberInfo[] v4NewMis = v4Mis.Where(mi =>
    !v3Type.MemberNames.Contains(mi.Name)).ToArray(); 
                        result.Add(new TypeMembers()
                        {
                            FullName = v4Type.FullName,
                            MemberNames = v4NewMis.Select(mi => mi.Name).ToList()
                        });
                    }
                }
            }
            #endregion
            #region 所有新增的Type
            List<string> v3TypeFullName = lstOldTypes.Select(tm => tm.FullName).ToList();
Type[] v4NewTypes = v4Types.Where(t => !v3TypeFullName.Contains(t.FullName) &&
!t.IsEnum).ToArray();
            foreach (Type v4NewType in v4NewTypes)
            {
                result.Add(new TypeMembers()
                {
                    FullName = v4NewType.FullName,
                    MemberNames = v4NewType.GetMembers().Select(mi => mi.Name).ToList()
                });
            }
            #endregion
            return result.OrderBy(tm=>tm.FullName).ToList();
        }
    }
}

服務的實現和第一個反射的版本差不多。

Web.config文件綁定代碼如下：

復制代碼代碼如下:

<system.serviceModel>
    <bindings>
      <wsHttpBinding>
        <binding name="NewBinding0" maxReceivedMessageSize="65536000" />
      </wsHttpBinding>
      <mexHttpBinding>
        <binding name="NewBinding1" />
      </mexHttpBinding>
    </bindings>
    <services>
      <service behaviorConfiguration="V4WcfService.Service1Behavior"
        name="V4WcfService.Service1">
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="NewBinding0"
          contract="V4WcfService.IService1">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" bindingConfiguration="NewBinding1"
          contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="V4WcfService.Service1Behavior">
          <!-- 為避免泄漏元數據信息，請在部署前將以下值設置為 false 并刪除上面的元數據終結點 -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- 要接收故障異常詳細信息以進行調試，請將以下值設置為 true。在部署前設置為 false 以避免泄漏異常信息 -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

因為默認的maxReceivedMessageSize 為65536，所以在后面增加了兩個0, 否則會拋出經典的超出范圍的異常。

WinForm程序界面如下：

后臺代碼如下：

復制代碼代碼如下:

namespace V4NewLooker
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private List<TypeMembers> NewTypeMembers { get; set; }
        private void btnSearch_Click(object sender, EventArgs e)
        {
            Assembly mscorlibAssembly = typeof(object).Assembly;
            List<TypeMembers> v3TypeMembers = new List<TypeMembers>();
            foreach (Type v4NewType in mscorlibAssembly.GetTypes())
            {
                List<string> memberNames = new List<string>();
                MemberInfo[] mis = v4NewType.GetMembers();
                foreach (MemberInfo mi in mis)
                {
                    memberNames.Add(mi.Name);
                }
                v3TypeMembers.Add(new TypeMembers()
                {
                    FullName = v4NewType.FullName,
                    MemberNames = memberNames
                });
            }
            using (Service1Client client = new Service1Client())
            {
                NewTypeMembers = client.GetNewTypeMember(v3TypeMembers);
            }
            List<string> typeNames=new List<string>();
            foreach (TypeMembers tm in NewTypeMembers)
            {
                typeNames.Add(tm.FullName);
            }
            lstBox_Types.DataSource = typeNames;
        }
        private void lstBox_Types_SelectedIndexChanged(object sender, EventArgs e)
        {
            string fullName = lstBox_Types.SelectedItem.ToString();
            foreach (TypeMembers tm in NewTypeMembers)
            {
                if (tm.FullName == fullName)
                {
                    lstBox_Members.DataSource = tm.MemberNames;
                    break;
                }
            }
        }
    }
}