MySqlParameter中的Add方法抛出错误

Question

我正在尝试从C＃应用程序查询MySql数据库。下面是我正在使用的代码

public class GetNameController : ApiController
{
    [HttpGet]
    public HttpResponseMessage GetName(string J_No)
    {
        List<MySqlParameter> prms = new List<MySqlParameter>();
        prms.Add(new MySqlParameter("J_No", MySqlDbType.VarChar, J_No, ParameterDirection.Input));

        string connStr = ConfigurationManager.ConnectionStrings["DB-connectionString"].ConnectionString;
        using (MySqlConnection dbconn = new MySqlConnection(connStr))
        {
            DataSet userDataset = new DataSet();
            var strQuery = "SELECT * from Name_View where where Number = :J_No ";

我之前使用Oracle DB连接做了这样的事情。但是使用上面的代码我在prms.Add()喜欢

时遇到错误

The best overloaded method match for 'MySql.Data.MySqlClient.MySqlParameter.MySqlParameter(string, MySql.Data.MySqlClient.MySqlDbType, int, string)' has some invalid arguments