c# - ASP.Net MySql 选择错误

Question

我在我的 asp.net 网站上运行此功能：

private static DataTable GetData(string query)
{
    string strConnString = "SERVER=localhost;DATABASE=database;UID=root;PASSWORD=123456789;";
    using (SqlConnection con = new SqlConnection(strConnString))
    {
        using (SqlCommand cmd = new SqlCommand())
        {
            cmd.CommandText = query;
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                using (DataSet ds = new DataSet())
                {
                    DataTable dt = new DataTable();
                    sda.Fill(dt);
                    return dt;
                }
            }
        }
    }
}

使用此查询：

"select * from Client where id='"+ customerId +"'"

我得到了这个例外：

System.Data.SqlClient.SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

知道什么可以解决这个问题吗？

Answer 1

连接Mysql，试试这个：

*添加Mysql.Data.dll，阅读这里

*在页面顶部添加此行

using MySql.Data.MySqlClient;

并尝试这个编辑的方法：

private static DataTable GetData(string query)
{
    string strConnString = "SERVER=localhost;DATABASE=database;UID=root;PASSWORD=123456789;";
    using (MySqlConnection con = new MySqlConnection(strConnString))
    {
        using (MySqlCommand cmd = new MySqlCommand())
        {
            cmd.CommandText = query;
            using (MySqlDataAdapter sda = new MySqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                using (DataSet ds = new DataSet())
                {
                    DataTable dt = new DataTable();
                    sda.Fill(dt);
                    return dt;
                }
            }
        }
    }
}