WCF服务返回Xamarin.Android中的对象列表

Question

I want to return list of object in WCF , my problem is how do i implement it in my application

public List GetConsumer(string transformer, string account) { var search = new List();

    using (var conn = new MySqlConnection(ConnString))
    {
        var item = new SearchConsumer();
        conn.Open();
        const string cmdText = "SELECT * FROM tblconsumer_account WHERE transformer=@tsf AND accountNumber=@acct";
        var cmd = new MySqlCommand(cmdText, conn);
        cmd.Parameters.AddWithValue("@tsf", transformer);
        cmd.Parameters.AddWithValue("@acct", account);
        var reader = cmd.ExecuteReader();
        while (reader.Read())
        {

            item.SearchResult = true;
            item.AccountNumber = reader["accountNumber"].ToString();
            item.TrasformerNumber = reader["transformer"].ToString();
            item.Firstname = reader["firstname"].ToString();
            item.LastName = reader["lastname"].ToString();
            item.Address = reader["address"].ToString();
            item.SerialNumber = reader["serialNumber"].ToString();
            search.Add(item);
        }
    }
    return search.ToList();
}

iam using this guide as reference, but i have a problem finding properties in my application,like e.Result.Lastname , e.Result.Firstname

Answer 1

Change the following

public List GetConsumer(string transformer, string account)

to

public List<SearchConsumer> GetConsumer(string transformer, string account) {

and then update your service reference on your mobile project.

You will then be able to do the following:

using(var service = new MyService()) //MyService is the name of your service reference
{
    var searchConsumers = service.GetConsumer(transformer, account);
    //Then loop your list
    foreach(var searchConsumer in searchConsumers)
    {
        //Now access properties
        //searchConsumer.Firstname, searchConsumer.Lastname
    }
}

If you only want to return a single object, then you will need to change your signature to the following:

public SearchConsumer GetConsumer(string transformer, string account)

and change the body of the function to only get one item, the usage for this would be:

using(var service = new MyService()) //MyService is the name of your service reference
{
    var searchConsumer = service.GetConsumer(transformer, account);
    //Now access properties
    //searchConsumer.Firstname, searchConsumer.Lastname
}

Edit

If you are going to use async web service calls you would need to do something like this

using(var service = new MyService()) //MyService is the name of your service reference
{
    service.GetConsumerCompleted += GetConsumerCompletedCallback;
    service.GetConsumerAsync(transformer, account);
}

//this method can be auto generated when hitting tab twice in visual studio after adding +=

public void (object sender, GetConsumerCompletedEventArgs e)
{
    //e.Result.Firstname, e.Result.Lastname
    //or if you are returning a list then loop over using code above
}