Question

我想在WCF中返回对象列表，我的问题是如何在我的应用程序中实现它

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使用此guide作为参考，但我在应用程序中查找属性时遇到问题，例如e.Result.Lastname，e.Result.Firstname

Answer 1

更改以下内容

public List GetConsumer(string transformer, string account)

到

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

然后在您的移动项目上更新您的服务参考。

然后您就可以执行以下操作：

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
    }
}

如果您只想返回单个对象，则需要将签名更改为以下内容：

public SearchConsumer GetConsumer(string transformer, string account)

并将函数的主体更改为仅获取一个项目，其用法为：

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
}

修改

如果您打算使用异步Web服务调用，则需要执行类似这样的操作

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 }

WCF服务返回Xamarin.Android中的对象列表

1 个答案: