Lightswitch - 使用wCF和Silverlight自定义控件在Lightswitch中显示数据

问题描述

帮助，帮助，帮助。我已经阅读了很多文章（非常好的文章）。我已经在这3天了，只是无法弄清楚我的问题是什么。



问题：

我创建了一个基于WCF和SilverLight自定义控件的屏幕。当我在编辑细节屏幕上使用它时，WCF正在查找（它会带回数据）。在同一个屏幕上，我添加了自定义控件，但数据没有绑定。 WCF具有GetGamerProfile（Guid？，userId）方法，该方法用作屏幕成员的数据源（屏幕的左侧）。我创建了一个用于参数（userid）的查询和屏幕参数。这一切都运行正常，但自定义控件绑定不起作用。我还没有尝试绑定图像，因为我无法使简单的文本框绑定工作。基本上，自定义控件绑定不起作用。



XAML代码：

Help, Help, Help. I have read lots of articles (very good articles) on this. I have been at this for 3 days now and just can't figure out what my problem is.

The Problem:
I created a Screen based on a WCF and SilverLight Custom Control. The WCF is working find when I use it on the Edit Detail Screen (it brings back the data). On the same screen, I add the custom control, but the data is not binding. The WCF has a GetGamerProfile(Guid?, userId) method which is used as the datasource for the screen member (left side of screen). I created a query and screen parameter to use for the parameter (userid). This is all working fine, but the custom control binding is not working. I did not tried to bind the image yet, because I couldn't get the simple textbox binding to work. Basically, the Custom Control binding is not working.

XAML Code:

sdk:TabItem Header="Profile" Name="tabItemProfile" DataContext="{Binding Screen.GetGamerProfile}"

TextBox Height="23" HorizontalAlignment="Left" Margin="269,7,0,0" Name="tbxCareer" VerticalAlignment="Top" Width="120" Grid.Column="1" Text="{Binding  
Screen.Career,Mode=TwoWay}"

注意：文本框是TabItem（tabItemProfile）



WCF代码（工作正常）：

Note: textbox is part of the TabItem (tabItemProfile)

WCF Code (which is working):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ComponentModel.DataAnnotations;
using System.Data.EntityClient;
using System.ServiceModel.DomainServices.Server;
using System.Web.Configuration;
using limitlessData.Implementation;

namespace GamerProfileWCF
public class GamerProfile
{
    [Key]
    public Guid     GamerProfileGUID { get; set; }
    [Key]
    public Guid UserProfileGUID { get; set; }
    public string   Career { get; set; }
    public byte[] AvartarImage { get; set; }
}
    public class GamerProfileWCF : System.ServiceModel.DomainServices.Server.DomainService
    {
        private limitlessDataObjectContext context;

        public limitlessDataObjectContext Context
        {
            get
            {
                if (this.context == null)
                {
                    EntityConnectionStringBuilder builder = new EntityConnectionStringBuilder();
                    builder.Metadata =
                      "res://*/limitlessData.csdl|res://*/limitlessData.ssdl|res://*/limitlessData.msl";
                    builder.Provider = "System.Data.SqlClient";
                    builder.ProviderConnectionString =
                      WebConfigurationManager.ConnectionStrings["limitlessData"].ConnectionString;

                    this.context = new limitlessDataObjectContext(builder.ConnectionString);
                }
                return this.context;
            }
        }
		
        [Query(IsDefault = true)]
        public IQueryable<gamerprofile> GetGamers()
        {
            return this.Context.GAMER_PROFILEs
                .Select(g =>
                    new GamerProfile()
                    {
                        GamerProfileGUID = (Guid)g.gamer_profile_id,
                        UserProfileGUID = (Guid)g.user_profile_id,
                        AvartarImage = (byte[])g.avartar_Image,
                        Career = g.career
                    });
        }

        [Query(IsComposable = false)]
        public IQueryable<gamerprofile> GetGamerProfile(Guid? userID)
        {
            userID = new Guid("7b984d40-48e2-4be1-94ce-5281b4170406");             
            
            return (from userP in this.Context.USER_PROFILEs
                    join gamerP in this.Context.GAMER_PROFILEs on userP.user_profile_id equals gamerP.user_profile_id                  
                    where userP.user_profile_id == userID                   
                     select new GamerProfile()
                     {
                         GamerProfileGUID   = (Guid)gamerP.gamer_profile_id,
                         UserProfileGUID 	= (Guid)userP.user_profile_id,
                         AvartarImage       = (byte[]) gamerP.avartar_Image,
                         Career             = gamerP.career
                     });
        }
    }
}

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