解决“不允许类型 System.DelegateSerializationHolder 和从中派生的类型(例如 System.DelegateSerializationHolder)在此安全级别上被反

王朝c#·作者佚名  2006-12-17
窄屏简体版  字體: |||超大  

解决“不允许类型 System.DelegateSerializationHolder 和从中派生的类型(例如 System.DelegateSerializationHolder)在此安全级别上被反序列化”错误的办法。

在.NET Framework 1.1中安全级别默认是Low的,所以不能被反序列化。以下代码是是一个聊天程序,在修改了配置文件后就可以访问了。

远程处理程序:ChatCoordinator.cs

using System;

using System.Runtime.Remoting;

using System.Collections;

[Serializable]

public class SubmitEventArgs : EventArgs{

private string _string = null;

private string _alias = null;

public SubmitEventArgs(string contribution, string contributor){

this._string = contribution;

this._alias = contributor;

}

public string Contribution{

get{

return _string;

}

}

public string Contributor{

get {

return _alias;

}

}

}

public delegate void SubmissionEventHandler(object sender, SubmitEventArgs submitArgs);

public class ChatCoordinator : MarshalByRefObject{

public ChatCoordinator(){

Console.WriteLine('聊天控制对象已经建立。 实例: ' + this.GetHashCode().ToString());

}

public override object InitializeLifetimeService(){

return null;

}

public event SubmissionEventHandler Submission;

public void Submit(string contribution, string contributor){

Console.WriteLine('{0} 发送: {1}.', contributor, contribution);

SubmitEventArgs e = new SubmitEventArgs(contribution, contributor);

if (Submission != null){

Console.WriteLine('广播……');

Submission(this, e);

}

}

}

宿主应用程序:Server.cs

using System;

using System.Runtime.Remoting;

public class Server

{

public static void Main(string[] Args)

{

RemotingConfiguration.Configure('Central.config');

Console.WriteLine('服务已经启动。 按回车键退出。');

Console.ReadLine();

}

}

客户端应用程序:client.cs

using System;

using System.Runtime.Remoting;

using System.Runtime.Remoting.Channels;

using System.Runtime.Remoting.Channels.Http;

public class ChatClient : MarshalByRefObject {

private string username = null;

public override object InitializeLifetimeService() {

return null;

}

public ChatClient(string alias){

this.username = alias;

}

public void Run(){

RemotingConfiguration.Configure('Client.config');

ChatCoordinator chatcenter = new ChatCoordinator();

chatcenter.Submission += new SubmissionEventHandler(this.SubmissionReceiver);

String keyState = '';

while (true){

Console.WriteLine('按0和回车键退出:\r\n');

keyState = Console.ReadLine();

if (String.Compare(keyState,'0', true) == 0)

break;

chatcenter.Submit(keyState, username);

}

chatcenter.Submission -= new SubmissionEventHandler(this.SubmissionReceiver);

}

public void SubmissionReceiver(object sender, SubmitEventArgs args){

if (String.Compare(args.Contributor, username, true) == 0){

Console.WriteLine('你的消息经被广播。。');

}

else

Console.WriteLine(args.Contributor + ' 说: ' + args.Contribution);

}

public static void Main(string[] Args){

if (Args.Length != 1){

Console.WriteLine('You need to type an alias.');

return;

}

ChatClient client = new ChatClient(Args[0]);

client.Run();

}

}

服务器端配置文件:Central.config

<configuration>

<system.runtime.remoting>

<application>

<service>

<wellknown mode='Singleton' type='ChatCoordinator, ChatCoordinator' objectUri='Chat' />

</service>

<channels>

<channel ref='http' port='8080'>

<!--

以下红颜色的部分是控制按级别的

Full: .NET 远程处理的完全反序列化级别。它在所有情况下都支持远程处理所支持的全部类型。

Low: .NET 远程处理的低反序列化级别。它支持与基本的远程处理功能相关联的类型。

-->

<serverProviders>

<provider ref='wsdl' />

<formatter ref='soap' typeFilterLevel='Full' />

<formatter ref='binary' typeFilterLevel='Full' />

</serverProviders>

</channel>

</channels>

</application>

</system.runtime.remoting>

</configuration>

客户端配置文件:Client.config

<configuration>

<system.runtime.remoting>

<application>

<client>

<wellknown type='ChatCoordinator, ChatCoordinator' url='http://localhost:8080/Chat' />

</client>

<channels>

<channel ref='http' port='0'>

<!--以下红颜色的部分是控制按级别的-->

<serverProviders>

<provider ref='wsdl' />

<formatter ref='soap' typeFilterLevel='Full' />

<formatter ref='binary' typeFilterLevel='Full' />

</serverProviders>

</channel>

</channels>

</application>

</system.runtime.remoting>

</configuration>

在该目录中的命令提示处,键入以下命令就可以运行了:

csc /t:library ChatCoordinator.cs

csc /r:ChatCoordinator.dll server.cs

csc /r:ChatCoordinator.dll client.cs

 
 
 
免责声明:本文为网络用户发布,其观点仅代表作者个人观点,与本站无关,本站仅提供信息存储服务。文中陈述内容未经本站证实,其真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。
 
 
© 2005- 王朝網路 版權所有 導航