breezejs与保存捆绑问题 [英] breezejs issues with the save bundle

问题描述

与breezejs进出口工作，和我的应用程序的服务器端code是.NET。

im working with breezejs, and the server-side code of my app is .net.

在我的意见（客户端），我想补充和实体的话，我想保存它。让我们假设一个实体是这样的：

in my views (client side), i want to add and entity then i want to save it. Lets assume that an entity is like this :

{
  "Id": 1,
  "Name": "someName",
  "CreatedDate": "1900-01-01T05:00:00Z",
  "UpdatedDate": "1900-01-01T05:00:00Z",
  "CreatedBy": null,
  "UpdatedBy": null,
  "RowVersion": 0,
   etc ...
  }
}

我想设置 CreatedDate UpdatedDate CreatedBy 和 UpdatedBy ，我能做到这一点当然是使用JavaScript的，但我不希望客户端利用这些样的东西照顾。

i want to set the values of CreatedDate UpdatedDate CreatedBy and UpdatedBy, i can do that using javascript of course, BUT i dont want the client to take care of those kind of things.

我的微风控制器在哪里住这个功能是这样的：

my breeze controller where lives this function is like this:

[HttpPost]
public SaveResult SaveChanges(JObject saveBundle)
{
    return _contextProvider.SaveChanges(saveBundle);
 }

为u可以看到saveBundle是JObject，当我调试我看到saveBundle是这样的：

as u can see the saveBundle is a JObject, when i debug i see the saveBundle like this:

{
"entities": [
{
  "Id": 1,
  "Name": "someName",
  "CreatedDate": "1900-01-01T05:00:00Z",
  "UpdatedDate": "1900-01-01T05:00:00Z",
  "CreatedBy": null,
  "UpdatedBy": null,
  "RowVersion": 0,
   etc ...
    }
  }
}
],
"saveOptions": {}
}

我怎样才能改变 CreatedDate UpdatedDate CreatedBy 和 UpdatedBy 在saveBundle保存前将提交???

How can i change the values of CreatedDate UpdatedDate CreatedBy and UpdatedBy in the saveBundle before the save is commited ???

这是与对象作为亲preTY阵列的JObject，我可以操纵的Json使用JavaScript，我怎么能做到这一点与.net ???

this is a JObject with an array of objects as proprety, i can manipulate Json with javascript, how can i do it with .Net ???

多谢了。

推荐答案

由于周杰伦Traband后，我终于找到了一种方法在保存前更改的实体。

Thanks to Jay Traband post I finally found a way to make changes to an entity before saving it.

我重载 BeforeSaveEntity 是这样的：

protected override bool BeforeSaveEntity(EntityInfo entityInfo) {
        // Return false if don´t want to  save the entity
        var entityType = entityInfo.Entity.GetType();

        if (entityInfo.Entity.GetType() == typeof(MyEntityTypeModel))
        {
            if (entityInfo.EntityState == EntityState.Added)
            // It can be 'Modified' or 'Deleted'
            {
                var MyModel = entityInfo.Entity as MyEntityTypeModel;

                MyModel.CreatedDate = DateTime.Now;
                MyModel.UpdatedDate = DateTime.Now;
                string username = Membership.GetUser().UserName;
                MyModel.CreatedBy = username;
                MyModel.UpdatedBy = username;
            }
        }
        return true;
   }

感谢了很多，我希望这将帮助别人一天。

Thanks a lot, and I hope this will help someone someday.

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