Question

Goal: create webservice that will query database and return rows, then pass it to client application and insert into DataGridView.

what I have done:

    [WebMethod]
    public IEnumerable<DataRow> getTransactions(int client_id)
    {
        BankDataLINQDataContext DB = new BankDataLINQDataContext();
        IEnumerable<DataRow> query = (from u in DB.Transactions.AsEnumerable() where u.ClientID == client_id select u) as IEnumerable<DataRow>;
        return query;
    }

Problem:
1. No error before compile – error occured while i try to compile code.
2. I don’t have any idea how to pick up data in Client Application. I tried pass it by List but it didn’t work (“No Valid Source).

Please help…

Answer 1

I found it!

Side of WebService:

    [WebMethod(Description="Pobranie operacji z konta bankowego")]
    public List<Transaction> GetTransactions(int clientID)
    {
        BankDataLINQDataContext DB = new BankDataLINQDataContext();
        List<Transaction> ListOfTrans = (from u in DB.Transactions  
                                      where u.ClientID == clientID 
                                      select u).ToList();

        return ListOfTrans;

    }

side of client of WebService:

        List<Transaction> ListToView = getalltransactions.GetTransactions(ClientID).ToList();
        GridView1.DataSource = ListToView;
        GridView1.DataBind();

I hope that this solution will be useful for someone.
Thanks for all hints 🙂