客户端服务器套接字应用程序上的方法错误没有重载

时间:2015-11-03 21:19:14

标签: c# wpf sockets .net-4.0 ipc

我正在创建一个客户端/服务器WPF应用程序,如果客户端尚未连接,则服务器应用程序将新客户端信息添加到listview项目,或者如果已连接,则更新特定客户端的OnDataReceived信息。我得到'没有重载 - 匹配委托 - 错误',但我真的不明白为什么。有人能告诉我我做错了吗?

顺便说一下,我对服务器/客户端套接字通信很陌生,所以如果有人能指出我的某些资源,我会非常感激。

(用bkribbs回复更新)

// Error is here:
private void UpdateClientListControl()
{
    if (Dispatcher.CheckAccess())
    {
       var lv = listBoxClientList;
       listBoxClientList.Dispatcher.BeginInvoke(new UpdateClientListCallback(UpdateClientList), new object[] { this.listBoxClientList, false, null });

       //No overload for 'UpdateClientList' matches delegate 'UpdateClientListCallback'
       //I think the error is in how i added these additional parameters, but I tried using 'bool AlreadyConnected' and 'ClientInfo CurrentClient' and
       //I get more errors 'Only assignment, call, incriment, ... can be used as a statement'

    }
    else
    {
        UpdateClientList(this.listBoxClientList);
    }
}

// This worked fine until I added bool Alreadyconnected and CurrentClient
void UpdateClientList(ListView lv, bool AlreadyConnected=false, ClientInfo CurrentClient = null)
    {
        if (AlreadyConnected)
        {
            //Updates listview with CurrentClient information that has changed
        }
        else
        {
            //Updates listview with new client information
        }
}

我是如何在OnDataReceived中使用它的?

public void OnDataReceived(IAsyncResult asyn)
{
    //after receiving data and parsing message:
    if(recieved data indicates already connected)
    {
        UpdateClientList(this.listBoxClientList, true, clientInfo);
    }
    else
    {
        UpdateClientList(this.listBoxClientList);
    }

}

1 个答案:

答案 0 :(得分:1)

你关闭了。有两个问题。

您现在提到的那个是因为您没有更新UpdateClientListCallback的委托声明,因为您添加了两个额外的参数。

现在看起来像:

delegate void UpdateClientListCallback(ListView lvi);

您需要将其更改为:

delegate void UpdateClientListCallback(ListView lvi, bool AlreadyConnected, ClientInfo CurrentClient);

您很快就会发现的其他问题是您的参数有点错误。您正在使用Dispatcher.BeginInvoke(Deletegate, Object[])

所以要解决问题,请更换:

listBoxClientList.Dispatcher.BeginInvoke(new UpdateClientListCallback(UpdateClientList), this.listBoxClientList, false, null);

with:

object[] parameters = new object[] { this.listBoxClientList, false, null };
listBoxClientList.Dispatcher.BeginInvoke(new UpdateClientListCallback(UpdateClientList), parameters);

或者是一个漂亮的衬垫:

listBoxClientList.Dispatcher.BeginInvoke(new UpdateClientListCallback(UpdateClientList), new object[] { this.listBoxClientList, false, null });