WCF Ria Services 如何创建一个客户端已知的定制实体？
我构建了我的实体模型。我的业务对象之一（我们称之为 Store）具有空间数据类型。我很快发现空间字段不是通过 EF4 映射的。然而，我通过编辑定义查询的 xml 声明来挣扎，如下所示：
<EntitySet Name="Stores" EntityType="Eltrun.OnShelfAuditModel.Store.Stores">
<DefiningQuery>
SELECT [rowId], [storeName], [location].STAsText() as location FROM Stores
</DefiningQuery>
</EntitySet>
此时，我决定通过像这样的部分类来自定义我的 Store 实体，只是为了进行转换并仍然保留存储的 SQLGeography 数据，返回只是客户端的 double[] （因为我既不能返回 SqlGeography，也不能返回 Location（Bing 数据类型）。
public partial class Store
{
public double[] StoreLocation
{
get
{
SqlGeography geoLocation = SqlGeography.
STPointFromText(new SqlChars(this.location.ToCharArray()), 4326);
return new double[]{
(double)geoLocation.Lat,
(double)geoLocation.Long};
}
}
}
如何在客户端项目中了解我的小自定义的 Store 数据类型？ 谢谢你！
I constructed my Entity Model. One of my business objects,let's call it Store has a spatial data type. Very quickly I figured out that spatial fields aren't mapped via EF4. However I struggled my way out, by editing the xml declarations defining a query like the following:
<EntitySet Name="Stores" EntityType="Eltrun.OnShelfAuditModel.Store.Stores">
<DefiningQuery>
SELECT [rowId], [storeName], [location].STAsText() as location FROM Stores
</DefiningQuery>
</EntitySet>
At this point I decided to customize my Store entity via a partial class like this, just to make the conversion and still keep the SQLGeography data stored, returning just a double[] at client (as I cannot return neither SqlGeography, neither Location (Bing datatype).
public partial class Store
{
public double[] StoreLocation
{
get
{
SqlGeography geoLocation = SqlGeography.
STPointFromText(new SqlChars(this.location.ToCharArray()), 4326);
return new double[]{
(double)geoLocation.Lat,
(double)geoLocation.Long};
}
}
}
How can I make aware the Store data type of my little customization, at client project?
Thank you!
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只需向您的属性添加一个 setter，RIA Services 代码生成器和序列化程序就应该在客户端版本的 Store 类上创建等效的属性。
希望有帮助...
Just add a setter to your property, and the RIA Services code generator and serializer should create the equivalent property on the client's version of the Store class.
Hope that helps...