c# - 在两个 IP 地址之间做出选择

Question

<分区>

Answer 1

你可以尝试这样的事情:

MySqlConnection connection;

if (this.TryConnect("xxx.xxx.xxx.xxx", out connection))
{
    // display error message here   
}
else if (this.TryConnect("localhost", out connection))
{
    // code here
}

下面是 TryConnect 函数的样子:

public bool TryConnect(string ServerIP, out MySqlConnection connection)
{
    try
    {
        const string connectionString = "Server={0};Database=<database>;Uid=<username>;Pwd=<password>;";
        var conn = new MySqlConnection(string.Format(connectionString, ServerIP));

        conn.Open();
        conn.Close();
        connection = conn;
        return true;
    }
    catch (Exception)
    {
        connection = null;
        return false;
    }
}