在Framework 4.0中:找出新增的方法與新增的類(二)

更新時(shí)間：2013年05月13日 17:17:27 作者：

為什么動(dòng)態(tài)加載程序集無法找出Framework 4.0 和Framwork2.0 新增的方法和類

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(dòng)態(tài)加載程序集無法找出Framework 4.0 和Framwork2.0 新增的方法和類？

因?yàn)榭刂婆_(tái)程序默認(rèn)就添加了Framework4.0的程序集，當(dāng)你使用Object，Type，string這些類的時(shí)候就已經(jīng)在使用已經(jīng)加載的程序集了，而clr不會(huì)重復(fù)的去加載程序集？？，這點(diǎn)記不清了。
所以V2Assembly 和v4Assembly都是Framework4.0的Assembly。

驗(yàn)證：

復(fù)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?yàn)閙scorlib.dll 是在Share Domain中的程序集，所以在同一應(yīng)用程序中無法加載兩個(gè)不同的mscorlib.dll.所以考慮使用兩個(gè)應(yīng)用程序，一個(gè)Framework 2.0,另一個(gè)Framework 4.0。

于是可以換個(gè)思路:使用2.0的framework來創(chuàng)建的程序來調(diào)用framework4.0的WCF服務(wù)。

代碼結(jié)構(gòu)如下：

V4NewLooker是基于framework 2.0的Winform程序

V4WcfService是基于framework 4.0 的WCF服務(wù)。

接口的定義如下：

復(fù)制代碼代碼如下:

namespace V4WcfService
{
    // 注意: 使用“重構(gòu)”菜單上的“重命名”命令，可以同時(shí)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(wù)實(shí)現(xiàn)代碼如下：

復(fù)制代碼代碼如下:

namespace V4WcfService
{
    // 注意: 使用“重構(gòu)”菜單上的“重命名”命令，可以同時(shí)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(wù)的實(shí)現(xiàn)和第一個(gè)反射的版本差不多。

Web.config文件綁定代碼如下：

復(fù)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(shù)據(jù)信息，請(qǐng)?jiān)诓渴鹎皩⒁韵轮翟O(shè)置為 false 并刪除上面的元數(shù)據(jù)終結(jié)點(diǎn) -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- 要接收故障異常詳細(xì)信息以進(jìn)行調(diào)試，請(qǐng)將以下值設(shè)置為 true。在部署前設(shè)置為 false 以避免泄漏異常信息 -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

因?yàn)槟J(rèn)的maxReceivedMessageSize 為65536，所以在后面增加了兩個(gè)0, 否則會(huì)拋出經(jīng)典的超出范圍的異常。

WinForm程序界面如下：

后臺(tái)代碼如下：

復(fù)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;
                }
            }
        }
    }
}