如何使用SharpSSH处理SSH超时异常

Question

我正在尝试连接到远程服务器以使用夏普SSH。我收到的超时异常是基于网络的异常。我希望即使网络出现问题，或者服务器根本不可用，程序也能更加健壮。超时发生在我的打开命令，并抛出IO超时异常。

我希望能从我这边解决这个断断续续的问题。

mySqlConnectionString = String.Format(
    "server={0};user={1};database=MTA;port=3306;password={2}", 
    SqlHost, mySqlUser, mySqlPass);
se = new SshExec(Host, User, Pass);
msc = new MySqlConnection(mySqlConnectionString);
// Connect to server and get the list of 
// firmware versions and serial numbers available
se.Connect();
lblConnected.Text = (se.Connected) ? "Connected" : "Not Connected";
msc.Open();         //exception happens here

我的问题:是否有一些方法我可以告诉c#应用程序只是尝试连接命令再次遇到异常?

Answer 1

尝试使用Try catch块:

        mySqlConnectionString = String.Format("server={0};user={1};database=MTA;port=3306;password={2}", SqlHost, mySqlUser, mySqlPass);
        se = new SshExec(Host, User, Pass);
        msc = new MySqlConnection(mySqlConnectionString);
        // Connect to server and get the list of firmware versions and serial numbers available
        se.Connect();
        lblConnected.Text = (se.Connected) ? "Connected" : "Not Connected";
        try
        {
            msc.Open();  //exception happens here
        }
        catch (Exception)
        {
            //do stuff, i.e. retry connection
            msc.Open();
        }

确保可以使用嵌套的try/catch:

        mySqlConnectionString = String.Format("server={0};user={1};database=MTA;port=3306;password={2}", SqlHost, mySqlUser, mySqlPass);
        se = new SshExec(Host, User, Pass);
        msc = new MySqlConnection(mySqlConnectionString);
        // Connect to server and get the list of firmware versions and serial numbers available
        se.Connect();
        lblConnected.Text = (se.Connected) ? "Connected" : "Not Connected";
        try
        {
            msc.Open();  //exception happens here
        }
        catch (Exception)
        {
            //do stuff, i.e. retry connection
            try
            {
                msc.Open();  //exception happens here
            }
            catch (Exception)
            {
                //do stuff
            }
        }