How do you use the MySql IN clause

Question

I am trying to figure out how to use the MySql In cluse with ASP.NET C#. Here is my code

var WebSites = string.Join(\",\", wsl.Select(x => \"\'\" + x.Doma         


        

Answer 1

I have found the answer. Here it is

    public static IList FindPostsByWebSiteList(string[] urls)
    {
        var pl = new List();
        var urlArray = urls.Select((x,y) => "@url" + y.ToString()).ToArray();
        var urlsJoined = string.Join(",", urlArray);
        string q = string.Format("select Id, Url, Title, Date, ImageUrl from post where WebSiteUrl IN ({0})", urlsJoined);

        using (MySqlConnection con = new MySqlConnection(WebConfigurationManager.ConnectionStrings["MySqlConnectionString"].ToString()))
        {
            using (MySqlCommand cmd = new MySqlCommand(q, con))
            {
                for (int x = 0; x < urlArray.Length; x++)
                {
                    cmd.Parameters.Add(urlArray[x], MySqlDbType.Text).Value = urls[x];
                }

                con.Open();

                var reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                while (reader.Read())
                {
                    var p = new Post();
                    p.Id = reader.GetInt32("Id");
                    p.Url = reader.GetString("Url");
                    p.Title = reader.GetString("Title");
                    p.Date = reader.GetDateTime("Date");
                    p.ImageUrl = reader.GetString("ImageUrl");
                    pl.Add(p);
                }
                return pl;
            }
        }
    }