wcf-data-services

问题 Reference to my previous question asked today in the following link I need help to write some code to cancel the changes on the client side without reloading the data. The only try I did was unsuccessfully as the following: private IEnumerable<TheEntity> _data; then: private void DoCancel() { _dataSource.Clear(true); _dataSource.Load(data); } I thought that I can clear the data and re-load a cached private field. Unfortunately, I get the error: Only a single enumeration is supported by this

问题 I have implemented a WCD Data Services / OData server, with an entity set as an open type. I am using custom IMetadataProvider, IQueryProvider, etc. I can create my entity, set open properties, retrieve them, update, and search -- mostly. The problem comes when I attempt to search for a property with something like a "dash" in the name This works: GET /Service/Cases?$filter=ABC eq 'ABC' This doesn't work: GET /Service/Cases?$filter=A-BC eq 'ABC' This also doesn't work: GET /Service/Cases?

问题 If you look at the following sample oData feed you'll see included navigation properties for 'child' items to tell you which URL to follow: http://services.odata.org/OData/OData.svc/Suppliers?$format=json For example supplier 0 has a navigation property to products. This links to a list of products for that supplier. http://services.odata.org/OData/OData.svc/Suppliers(0)/Products?$format=json I'm trying to do the same with ODataConventionModelBuilder and EntitySetController<Product> so that

问题 For the first time I have stumbled upon a problem where the solution has not already been provided (completely) on SO, but I hope someone out there can help. My problem is similar to PUT and DELETE in RESTful WCF Service cause 401 Unauthorized error . That is, I have a WCF Data Service where I get a 401 whenever I try to do updates or deletes (read and post works without any problems). The difference to the abovementioned post is that I am not hosting my service in IIS but on Windows Azure,

问题 I need to return a Dictionary (or some List, I just don't know) via a web service, specifically through a WCF Data Services. It looks like WCF Data Services does not support Dictionary types. Something to look like this via the web service: <?xml version="1.0" encoding="utf-8" standalone="yes" ?> - <Employees xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices"> <element>employee1, True</element> <element>employee2, False</element> <element>employee3, True</element> </Employees> I

问题 I need to return a Dictionary (or some List, I just don't know) via a web service, specifically through a WCF Data Services. It looks like WCF Data Services does not support Dictionary types. Something to look like this via the web service: <?xml version="1.0" encoding="utf-8" standalone="yes" ?> - <Employees xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices"> <element>employee1, True</element> <element>employee2, False</element> <element>employee3, True</element> </Employees> I

问题 Console application var result = dataService.CreateQuery<Customers>("GetCustomerByLastName"). AddQueryOption("lastname", "S"); Service [WebGet] public IQueryable<Customers> GetCustomerByLastName( string lastname ) { return from c in this.CurrentDataSource.Customers where c.LastName.StartsWith( lastname ) select c ; } results in: (relative to http://localhost:1478/Apress.Data.Services.CustomerService.Host/) RequestUri: CustomerDataService.svc/GetCustomerByLastName()?lastname=S and fails as a

问题 I am adding a ADO.Net Data Service lookup feature to an existing web page. Everything works great when running from visual studio, but when I roll it out to IIS, I get the following error: Request Error The server encountered an error processing the request. See server logs for more details. I get this even when trying to display the default page, i.e.: http://server/FFLookup.svc I have 3.5 SP1 installed on the server. What am I missing, and which "Server Logs" is it refering to? I can't find

问题 This sounds rather simple (and maybe I'm missing the obvious here) but I can't find a solution. I know I can query an entity and return one, or many direct child entities doing this: var query = from c in Service.Clients.Expand("Addresses,Comments,PhoneNumbers").. What I would like to be able to do is do the same with 3 levels (Children of child), lets say "Country->Province->City" or "Brand->Family->Model" I tried to expand all entities, but it fails var query = from c in Service.Brands

问题 I have a Silverlight application that contains a window that lists several values in multiple columns. The first column contains fields to be retrieved from a database, the second column contains table names. Multiple fields can be selected from the first column and only one field can be selected from the second column. So, the idea is to build a query that can select multiple columns from one of several tables (assume the column names are the same for each table). My question is how do I