windows-phone-7 - 如何通过实现 IDataServiceUpdateProvider 来更新 Azure 表存储资源？

Question

我正在尝试公开一个可编辑的 Azure 表存储表。（如果重要：通过 OData Client Lib CTP 赢得 Phone 7。）在服务器端，我有一个 DataServiceContext ： TableServiceContext, IDataServiceUpdateProvider

我可以添加和删除对象，但是当我尝试更新资源时，SaveChanges() 似乎不会“拾取”在调用 SetProperty 时分配的值。

//Works fine
public object GetResource(IQueryable query, string fullTypeName)
    {
        var resource = query.Cast<MyDataModel>().SingleOrDefault();
        if (fullTypeName != null && resource.GetType().FullName != fullTypeName)
        {
            throw new ApplicationException("Unexpected type for this resource");
        }
        return resource;
    }

//Seems to work fine: gets called for each property.
public void SetValue(object targetResource, string propertyName, object propertyValue)
    {
        var propInfo = targetResource.GetType().GetProperty(propertyName);
        propInfo.SetValue(targetResource, propertyValue, null);
    }

//This gets called, but resource is not updated 
void IUpdatable.SaveChanges()
    {
        //Forwarding from IUpdatable.SaveChanges() to DataServiceContext.SaveChanges()
        base.SaveChanges();
    }

更新：答案是在 SetValue() 期间调用 UpdateObject()：

public void SetValue(object targetResource, string propertyName, object propertyValue)
    {
        var propInfo = targetResource.GetType().GetProperty(propertyName);
        propInfo.SetValue(targetResource, propertyValue, null);
        UpdateObject(targetResource);
    }

Answer 1

更新：答案是在 SetValue() 期间调用 UpdateObject()：

public void SetValue(object targetResource, string propertyName, object propertyValue) { var propInfo = targetResource.GetType().GetProperty(propertyName); propInfo.SetValue(targetResource, propertyValue, null); 更新对象（目标资源）；}