需要檢索圖像（Varbinary MAX）從SQL Server 2014到Xamarin通過使用C＃

我是新來的Xamarin平臺，我有一個本地託管數據庫在SQL Server 2014中使用PHP（藉助XAMP服務器）和表名稱ItemProductsDB並保存圖像爲varbinary(MAX)。我將數據庫中的所有其他詳細信息作爲字符串（例如產品名稱，產品ID等）進行了分類，但圖像如下所示爲byte[]。需要檢索圖像（Varbinary MAX）從SQL Server 2014到Xamarin通過使用C＃

public class Contactone 
{ 
    public int ID { get; set; } 
    public string Name { get; set; } 
    public string Description { get; set; } 
    public string Price { get; set; } 
    public string Date { get; set; }   
    public byte[] Image { get; set; }   
} 

public class ContectList 
{ 
    public List<Contactone> contacts { get; set; } 
}

我已經創建了CS頁面和XAML檢索除了圖像等數據，下面JsonParsingPage.cs代碼（這下面的代碼運行得很好，但沒有圖像的檢索）

public partial class JsonParsingPage : ContentPage 
{ 
    public JsonParsingPage() 
    { 
     InitializeComponent(); 
     this.BackgroundImage = "background.png"; 
     this.Title = "Meals"; 
     GetJSON(); 
    } 

    public async void GetJSON() 
    { 
     // Check network status 
     if (NetworkCheck.IsInternet()) 
     { 
      var client = new System.Net.Http.HttpClient(); 
      var response = await client.GetAsync("http://192.168.43.226/GetProducts.php"); 
      string contactsJson = response.Content.ReadAsStringAsync().Result; 
      ContectList ObjContactList = new ContectList(); 
      if (contactsJson != "") 
      { 
       //Converting JSON Array Objects into generic list 
       ObjContactList = JsonConvert.DeserializeObject<ContectList>(contactsJson); 
      } 
      //Binding listview with server response 
      listviewConacts.ItemsSource = ObjContactList.contacts; 
     } 
     else 
     { 
      await DisplayAlert("JSONParsing", "No network is available.", "Ok"); 
     } 

     //Hide loader after server response 
     ProgressLoader.IsVisible = false; 
    }

該幕牆XAML代碼，如下面結合各自領域

e<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
     xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"    
     x:Class="TestProject.Views.DetailViews.JsonParsingPage">  
<Grid> 
    <Grid> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="Auto"/> 
      <RowDefinition Height="*"/> 
     </Grid.RowDefinitions>    
     <ListView x:Name="listviewConacts" Grid.Row="1" HorizontalOptions="FillAndExpand" HasUnevenRows="True" ItemSelected="listviewContacts_ItemSelected"> 
      <ListView.ItemTemplate> 
       <DataTemplate> 
        <ViewCell> 
         <Grid HorizontalOptions="FillAndExpand" Padding="10"> 
          <Grid.RowDefinitions> 
           <RowDefinition Height="Auto"/> 
           <RowDefinition Height="Auto"/> 
           <RowDefinition Height="Auto"/> 
           <RowDefinition Height="Auto"/> 
           <RowDefinition Height="Auto"/> 
          </Grid.RowDefinitions> 
          <Label Text="{Binding Name}" HorizontalOptions="StartAndExpand" Grid.Row="0" TextColor="White" FontAttributes="Bold"/> 
          <Label Text="{Binding Description}" HorizontalOptions="StartAndExpand" Grid.Row="1" TextColor="Orange" FontAttributes="Bold"/> 
          <Label Text="{Binding Price}" HorizontalOptions="StartAndExpand" Grid.Row="2" TextColor="Gray" FontAttributes="Bold"/> 
          <Label Text="{Binding Date}" HorizontalOptions="StartAndExpand" Grid.Row="3" TextColor="Gray" FontAttributes="Bold"/> 
          <Label Text="{Binding Image}" HorizontalOptions="StartAndExpand" Grid.Row="4" TextColor="Gray" FontAttributes="Bold"/> 
          <BoxView HeightRequest="2" Margin="0,10,10,0" BackgroundColor="Gray" Grid.Row="4" HorizontalOptions="FillAndExpand" /> 
         </Grid> 
        </ViewCell> 

       </DataTemplate> 
      </ListView.ItemTemplate> 
     </ListView> 
    </Grid> 
    <ActivityIndicator x:Name="ProgressLoader" IsRunning="True"/> 
</Grid> 
</ContentPage>

我的問題是：我有什麼做的，從SQL Server檢索和顯示varbinary圖片他們在Xamarin形式（包括CS和XAML代碼）？

任何幫助，將不勝感激。

潘

來源

2017-08-11 Pan Weerasekara

後，你讀字節[]從您的DB：

image.Source = ImageSource.FromStream(() => new MemoryStream(imageAsBytes));

來源

2017-08-13 18:46:21

需要檢索圖像（Varbinary MAX）從SQL Server 2014到Xamarin通過使用C＃

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