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RIA方法未出现在Silverlight中

wcf-ria-services silverlight-4.0 silverlight

0

Xavier Poinas · 技术社区 · 14 年前

我有一个域服务,有几个方法。

其中一个返回类型为string,没有参数:

public string MyMethod1() { }

我可以从Silverlight调用这个。

其中一个返回类型为void,参数为域对象(我正在使用LinqTosqlDomainService,此对象是DataContext的一部分):

public void MyMethod2(MyDomainObject object) { }

我也可以从Silverlight调用这个。

另一个具有字符串的返回类型和域对象的参数:

public string MyMethod3(MyDomainObject object) { }

我 无法从Silverlight调用此函数 ,因为该方法不会在代理上生成。

为什么不生成它,我该怎么做呢?

1 回复 | 直到 14 年前

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Joe McBride 14 年前

尝试添加 [Invoke] 操作的属性。

我创建了一个使用以下契约定义的示例应用程序,并且能够在Silverlight应用程序中生成所有三个方法。

这是DBML文件。 LINQ to SQL DBML file

这里是定义的服务。

[EnableClientAccess()]
public class DomainService1 : LinqToSqlDomainService<DataClasses1DataContext>
{
    public Player GetPlayer()
    {
        throw new NotImplementedException();
    }

    public void MyMethod(Player player)
    {
    }

    [Invoke]
    public string MyMethod2(Player player)
    {
        return String.Empty;
    }
}

这是Silverlight项目中生成的代码:

/// <summary>
/// Gets an EntityQuery instance that can be used to load <see cref="Player"/> entities using the 'GetPlayer' query.
/// </summary>
/// <returns>An EntityQuery that can be loaded to retrieve <see cref="Player"/> entities.</returns>
public EntityQuery<Player> GetPlayerQuery()
{
    this.ValidateMethod("GetPlayerQuery", null);
    return base.CreateQuery<Player>("GetPlayer", null, false, false);
}

/// <summary>
/// Invokes the 'MyMethod' method of the specified <see cref="Player"/> entity.
/// </summary>
/// <param name="player">The <see cref="Player"/> entity instance.</param>
public void MyMethod(Player player)
{
    player.MyMethod();
}

/// <summary>
/// Asynchronously invokes the 'MyMethod2' method of the domain service.
/// </summary>
/// <param name="player">The value for the 'player' parameter of this action.</param>
/// <param name="callback">Callback to invoke when the operation completes.</param>
/// <param name="userState">Value to pass to the callback.  It can be <c>null</c>.</param>
/// <returns>An operation instance that can be used to manage the asynchronous request.</returns>
public InvokeOperation<string> MyMethod2(Player player, Action<InvokeOperation<string>> callback, object userState)
{
    Dictionary<string, object> parameters = new Dictionary<string, object>();
    parameters.Add("player", player);
    this.ValidateMethod("MyMethod2", parameters);
    return ((InvokeOperation<string>)(this.InvokeOperation("MyMethod2", typeof(string), parameters, true, callback, userState)));
}

/// <summary>
/// Asynchronously invokes the 'MyMethod2' method of the domain service.
/// </summary>
/// <param name="player">The value for the 'player' parameter of this action.</param>
/// <returns>An operation instance that can be used to manage the asynchronous request.</returns>
public InvokeOperation<string> MyMethod2(Player player)
{
    Dictionary<string, object> parameters = new Dictionary<string, object>();
    parameters.Add("player", player);
    this.ValidateMethod("MyMethod2", parameters);
    return ((InvokeOperation<string>)(this.InvokeOperation("MyMethod2", typeof(string), parameters, true, null, null)));
}