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c# - 如何使用 Xamarin 显示通过 Web 服务获取的列表

问题描述

我可以使用数组来显示从 Web 服务获得的数据，并在列表视图中显示它们吗？

这是我的代码片段：

class WSResult2
{
    public string url { get; set; }
    public string equipment { get; set; }
    public string serial { get; set; }
}

class WSResultList
{
    public List<WSResult2> items { get; set; }
}

Page4.xaml.cs：

private async Task wsvarAsync(Result result)
    {
        WSClient client = new WSClient();

        string wUrl = "--Here is the url of the web service--" + result.Text + "&option=2";

        var resultws = await client.Get<WSResultList>(wUrl);


        if (resultws != null)
        { //I want to know how to use an array here to get the complete list of each of the items captured by the web service.
            lblEquipment.Text = resultws.items[0].equipment;
            lblSerial.Text = resultws.items[0].serial;
            lblurl.Text = resultws.items[0].url;

        }
    }

Page4.xaml：

<ContentPage.Content>

    <StackLayout Padding="20">
        <StackLayout HorizontalOptions="Center">
        <Button x:Name="btnScan" Text="Read code" HorizontalOptions="FillAndExpand" VerticalOptions="EndAndExpand" BackgroundColor="LightBlue" TextColor="White" FontSize="Medium" CornerRadius="25" Clicked="btnScan_Clicked"/>
    </StackLayout>

    <Label x:Name="lblInfo" />

    <Label Text="Equipment: " TextColor="Red"/>
    <Label x:Name="lblEquipment" />

    <Label Text="Serial: " TextColor="Red"/>
    <Label x:Name="lblSerial" />
    <!-- I want to know how to use a Binding to show all the data captured from the web service. -->
    <Label IsVisible="False" Text="Report: " TextColor="Red"/>
    <Label IsVisible="False" x:Name="lblurl" />
    <Button x:Name="btnUrl" Text="See report"  Clicked="OnButtonClicked" CornerRadius="25" HorizontalOptions="Center" TextColor="White" FontSize="Medium" BackgroundColor="Red"/>

</StackLayout>

</ContentPage.Content>

WSClient.cs 是反序列化 JSON 的客户端：

class WSClient
{
    public async Task<T> Get<T>(string url)
    {
        HttpClient client = new HttpClient();
        var response = await client.GetAsync(url);
        var json = await response.Content.ReadAsStringAsync();
        return JsonConvert.DeserializeObject<T>(json);
    }

    public async Task<T> Post<T>(string pUrl, T pData)
    {
        var wJsonData = JsonConvert.SerializeObject(pData);
        var wData = new StringContent(wJsonData, Encoding.UTF8, "application/json");
        HttpClient client = new HttpClient();
        var wResponse = await client.PostAsync(pUrl, wData);
        var json = await wResponse.Content.ReadAsStringAsync();
        return JsonConvert.DeserializeObject<T>(json);
    }
}

标签： c#xamlxamarin.forms

解决方案

Page4.xaml

<ListView x:Name="ResultList">
<ListView.ItemTemplate>
    <DataTemplate>
        <ViewCell>
          <StackLayout>
               <Label Text="{Binding url }"/>
                </StackLayout>

        </ViewCell>
    </DataTemplate>
</ListView.ItemTemplate></ListView>

Page4.xaml.cs

private async Task wsvarAsync(Result result)
    {
        WSClient client = new WSClient();


        var json = await client.GetStringAsync(wUrl);
        var resultList = JsonConvert.DeserializeObject<List<WSResultList>>(json)

        //to view each item on debug
        for(var i = 0; i < resultList i++){
            Console.WriteLine(resultList[i].equipment);
        }

        //populate the list view to visualize your data
        ResulitList.ItemSource = resultList;
    }

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