C# 在android应用程序中调用wcf并传递listview所选项目_C#_Android_Wcf_Xamarin

C# 在android应用程序中调用wcf并传递listview所选项目

c# android wcf xamarin

C# 在android应用程序中调用wcf并传递listview所选项目,c#,android,wcf,xamarin,C#,Android,Wcf,Xamarin,我知道前几天我发布了一个问题，关于如何将选定的android listview项传递给wcf服务应用程序。我只是想用最简单的方法让事情顺利进行。我遇到了使用wcf从所选县获取城镇的问题。我有一张带有id和county的county表。在towns表中，我有id、姓名和countyid 以下是我的wcf服务应用程序： [OperationContract] Festivalwrapper GetTownDataByCounty(int? id); public Festivalwrapper G

我知道前几天我发布了一个问题，关于如何将选定的android listview项传递给wcf服务应用程序。我只是想用最简单的方法让事情顺利进行。我遇到了使用wcf从所选县获取城镇的问题。我有一张带有id和county的county表。在towns表中，我有id、姓名和countyid

以下是我的wcf服务应用程序：

[OperationContract]
Festivalwrapper GetTownDataByCounty(int? id);

public Festivalwrapper GetTownDataByCounty(int? id)
{
    Festivalwrapper returnType = new Festivalwrapper();
    using (azureDBDataContext c = new azureDBDataContext())
    {
        returnType.TownList = (from town in c.Towns
                               where town.CountyID.Equals(id)
                               select new TownVM()
                               {
                                   ID = town.ID,
                                   Name = town.Name,
                               }).ToList();
    }
    return returnType;
}

这是我的第一个活动的

OnItemClick

：

     public void OnItemClick(AdapterView parent, View view, int position, long id)
     {
        var selectedValue = parent.GetItemIdAtPosition(position);
        //InitializeDataTownById(int position);
        var Intent = new Intent(this, typeof(SelectLocationActivity));
        // selectedValue should already be a string but...
        Intent.PutExtra("Name", selectedValue.ToString());
        StartActivity(Intent);
     }

    [Activity(Theme = "@style/Theme.AppCompat.Light")]
public class SelectLocationActivity : Activity
{
    private DataTransferProcClient _client;
    TextView _getTownsTextView;
    ListView _listView;
    public static readonly EndpointAddress EndPoint = new EndpointAddress("http://10.0.2.2:3190/DataTransferProc.svc");
    //private int id;

    protected override void OnCreate(Bundle bundle)
    {
        //var id = Intent.GetStringExtra("position");

        base.OnCreate(bundle);
        SetContentView(Resource.Layout.selectLocation);

        _listView = FindViewById<ListView>(Resource.Id.lvTowns);
        //_listView.OnItemClickListener = this;
        _listView.FastScrollEnabled = true;

        _getTownsTextView = FindViewById<TextView>(Resource.Id.getTownsTextView);

        InitializeDataTownById();
    }

    #region InitializeDataTown
    private void InitializeDataTownById()
    {
        var id = Intent.GetStringExtra("Name");
        int value;
        int.TryParse(id, out value);

        if (id != null)
        {
            BasicHttpBinding binding = CreateBasicHttp();
            _client = new DataTransferProcClient(binding, EndPoint);
            _client.GetTownDataByCountyCompleted += ClientOnDataTransferProcCompleted;
            _client.GetTownDataByCountyAsync(id);
        }
        //_client.Close ();
    }
    #endregion

    #region CreateBasicHttp
    private static BasicHttpBinding CreateBasicHttp()
    {
        var binding = new BasicHttpBinding()
        {
            Name = "basicHttpBinding",
            MaxReceivedMessageSize = 67108864,
        };

        binding.ReaderQuotas = new System.Xml.XmlDictionaryReaderQuotas()
        {
            MaxArrayLength = 2147483646,
            MaxStringContentLength = 5242880,
        };

        var timeout = new TimeSpan(0, 1, 0);
        binding.SendTimeout = timeout;
        binding.OpenTimeout = timeout;
        binding.ReceiveTimeout = timeout;
        return binding;
    }
    #endregion

    #region ClientOnDataTransferProcCompleted
    //test connection to wcf, if doesn't work, you'll get an error
    private void ClientOnDataTransferProcCompleted(object sender, GetTownDataByCountyCompletedEventArgs getTownDataByCountyCompletedEventArgs)
    {
        string msg = null;

        if (getTownDataByCountyCompletedEventArgs.Error != null)
        {
            msg = getTownDataByCountyCompletedEventArgs.Error.Message;
            msg += getTownDataByCountyCompletedEventArgs.Error.InnerException;
            RunOnUiThread(() => _getTownsTextView.Text = msg);
        }
        else if (getTownDataByCountyCompletedEventArgs.Cancelled)
        {
            msg = "Request was cancelled.";
            RunOnUiThread(() => _getTownsTextView.Text = msg);
        }
        else
        {
            msg = getTownDataByCountyCompletedEventArgs.Result.ToString();
            TestAndroid.Festivalwrapper testHolder = getTownDataByCountyCompletedEventArgs.Result;
            List<string> holder = testHolder.TownList.Select(item => item.Name).ToList();

            /*foreach (TestAndroid.CountyVM item in TestHolder.CountyList)
            {
                holder.Add (item.Name);
            }*/

            RunOnUiThread(() => _listView.Adapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, holder));
        }
    }
    #endregion

我的第二项活动是：

     public void OnItemClick(AdapterView parent, View view, int position, long id)
     {
        var selectedValue = parent.GetItemIdAtPosition(position);
        //InitializeDataTownById(int position);
        var Intent = new Intent(this, typeof(SelectLocationActivity));
        // selectedValue should already be a string but...
        Intent.PutExtra("Name", selectedValue.ToString());
        StartActivity(Intent);
     }

    [Activity(Theme = "@style/Theme.AppCompat.Light")]
public class SelectLocationActivity : Activity
{
    private DataTransferProcClient _client;
    TextView _getTownsTextView;
    ListView _listView;
    public static readonly EndpointAddress EndPoint = new EndpointAddress("http://10.0.2.2:3190/DataTransferProc.svc");
    //private int id;

    protected override void OnCreate(Bundle bundle)
    {
        //var id = Intent.GetStringExtra("position");

        base.OnCreate(bundle);
        SetContentView(Resource.Layout.selectLocation);

        _listView = FindViewById<ListView>(Resource.Id.lvTowns);
        //_listView.OnItemClickListener = this;
        _listView.FastScrollEnabled = true;

        _getTownsTextView = FindViewById<TextView>(Resource.Id.getTownsTextView);

        InitializeDataTownById();
    }

    #region InitializeDataTown
    private void InitializeDataTownById()
    {
        var id = Intent.GetStringExtra("Name");
        int value;
        int.TryParse(id, out value);

        if (id != null)
        {
            BasicHttpBinding binding = CreateBasicHttp();
            _client = new DataTransferProcClient(binding, EndPoint);
            _client.GetTownDataByCountyCompleted += ClientOnDataTransferProcCompleted;
            _client.GetTownDataByCountyAsync(id);
        }
        //_client.Close ();
    }
    #endregion

    #region CreateBasicHttp
    private static BasicHttpBinding CreateBasicHttp()
    {
        var binding = new BasicHttpBinding()
        {
            Name = "basicHttpBinding",
            MaxReceivedMessageSize = 67108864,
        };

        binding.ReaderQuotas = new System.Xml.XmlDictionaryReaderQuotas()
        {
            MaxArrayLength = 2147483646,
            MaxStringContentLength = 5242880,
        };

        var timeout = new TimeSpan(0, 1, 0);
        binding.SendTimeout = timeout;
        binding.OpenTimeout = timeout;
        binding.ReceiveTimeout = timeout;
        return binding;
    }
    #endregion

    #region ClientOnDataTransferProcCompleted
    //test connection to wcf, if doesn't work, you'll get an error
    private void ClientOnDataTransferProcCompleted(object sender, GetTownDataByCountyCompletedEventArgs getTownDataByCountyCompletedEventArgs)
    {
        string msg = null;

        if (getTownDataByCountyCompletedEventArgs.Error != null)
        {
            msg = getTownDataByCountyCompletedEventArgs.Error.Message;
            msg += getTownDataByCountyCompletedEventArgs.Error.InnerException;
            RunOnUiThread(() => _getTownsTextView.Text = msg);
        }
        else if (getTownDataByCountyCompletedEventArgs.Cancelled)
        {
            msg = "Request was cancelled.";
            RunOnUiThread(() => _getTownsTextView.Text = msg);
        }
        else
        {
            msg = getTownDataByCountyCompletedEventArgs.Result.ToString();
            TestAndroid.Festivalwrapper testHolder = getTownDataByCountyCompletedEventArgs.Result;
            List<string> holder = testHolder.TownList.Select(item => item.Name).ToList();

            /*foreach (TestAndroid.CountyVM item in TestHolder.CountyList)
            {
                holder.Add (item.Name);
            }*/

            RunOnUiThread(() => _listView.Adapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, holder));
        }
    }
    #endregion

[活动（主题=“@style/Theme.AppCompat.Light”）]
公共类SelectLocationActivity:活动
{
私有DataTransferProcClient\u客户端；
TextView_getdownstextview；
ListView _ListView；
公共静态只读EndpointAddress EndPoint=新的EndpointAddress（“http://10.0.2.2:3190/DataTransferProc.svc");
//私有int-id；
创建时受保护的覆盖无效（捆绑包）
{
//var id=Intent.GetStringExtra（“位置”）；
base.OnCreate（bundle）；
SetContentView（Resource.Layout.selectLocation）；
_listView=FindViewById（Resource.Id.lvTowns）；
//_listView.OnItemClickListener=此；
_listView.FastScrollEnabled=true；
_getTownsTextView=findviewbyd（Resource.Id.getTownsTextView）；
初始化为tatownbyid（）；
}
#区域初始化为Statown
private void InitializeDataownbyid（）
{
var id=Intent.GetStringExtra（“名称”）；
int值；
int.TryParse（id，out值）；
如果（id！=null）
{
BasicHttpBinding=CreateBasicHttp（）；
_客户端=新的DataTransferProcClient（绑定，端点）；
_client.GetTownDataByCountyCompleted+=ClientOnDataTransferProcCompleted；
_client.GetTownDataByCountyAsync（id）；
}
//_client.Close（）；
}
#端区
#区域CreateBasicHttp
私有静态BasicHttpBinding CreateBasicHttp（）
{
var binding=new BasicHttpBinding（）
{
Name=“basicHttpBinding”，
MaxReceivedMessageSize=67108864，
};
binding.ReaderQuotas=new System.Xml.XmlDictionaryReaderQuotas（）
{
MaxArrayLength=2147483646，
MaxStringContentLength=5242880，
};
var超时=新的时间跨度（0,1,0）；
binding.SendTimeout=超时；
binding.OpenTimeout=超时；
binding.ReceiveTimeout=超时；
返回绑定；
}
#端区
#已完成区域Clientondataransferproc
//测试与wcf的连接，如果不起作用，您将得到一个错误
私有void ClientOnDataTransferProcCompleted（对象发送方，GetTownDataByCountyCompletedEventArgs GetTownDataByCountyCompletedEventArgs）
{
字符串msg=null；
if（getTownDataByCountyCompletedEventArgs.Error！=null）
{
msg=getTownDataByCountyCompletedEventArgs.Error.Message；
msg+=getTownDataByCountyCompletedEventArgs.Error.InnerException；
RunOnUiThread（（）=>_getTownsTextView.Text=msg）；
}
else if（getTownDataByCountyCompletedEventArgs.Cancelled）
{
msg=“请求已取消。”；
RunOnUiThread（（）=>_getTownsTextView.Text=msg）；
}
其他的
{
msg=getTownDataByCountyCompletedEventArgs.Result.ToString（）；
TestAndroid.Festivalwrapper testHolder=getTownDataByCountyCompletedEventArgs.Result；
List holder=testHolder.TownList.Select（item=>item.Name.ToList（）；
/*foreach（TestHolder.CountyList中的TestAndroid.CountyVM项）
{
持有人。添加（项目名称）；
}*/
RunOnUiThread（（）=>_listView.Adapter=new ArrayAdapter（这个，Android.Resource.Layout.SimpleListItem1，holder））；
}
}
#端区

我在将字符串转换为int时也遇到问题。我在以下位置遇到错误：_client.GetTownDataByCountyAsync（id）

错误CS1503:参数1:无法从“字符串”转换为“int”（CS1503）

错误CS1502:与“DataTransferProcClient.GetTownDataByCountyAsync（int）”匹配的最佳重载方法具有一些无效参数（CS1502）

啊，我明白了，但除此之外，我在做其他事情对吗@Jason？再次查看代码后，我发现您使用的是TryParse（），但在调用_client.GetTownDataByCountyAsync（id）时，您传递的是输入（id）而不是输出（值）；谢谢Jason，我成功了。唯一的问题是，我的listview从0开始。有没有办法让listview从1开始？