odata | 易学教程

SAPUI5: Output formatted date

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问题 I´ve developed an SAPUI5 application with an XML-View. Now I want to format a date correctly. I tried it the following way: <Text text="{ path: 'model>LastCommDate', type: 'sap.ui.model.type.Date', formatOptions: { pattern: 'yyyy/MM/dd' } }" /> Error message: datajs.js:17 Uncaught TypeError: j.getTime is not a function Without the formatOptions and type I get the unformatted output. <Text text="{ path: 'model>LastCommDate' }" /> Output: 2015-06-16T00:00:00 EDIT: Same question for Time : How

Web Api with OData v4 throwing exception on $select

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问题 I'm using the latest version of WebApi and OData and everything is set up to work right. The only problem is when I try to use $select . It throws the error bellow Object of type 'System.Linq.EnumerableQuery`1[System.Web.OData.Query.Expressions.SelectExpandBinder+SelectAll`1[WebApplication1.Controllers.Person]]' cannot be converted to type 'System.Collections.Generic.IEnumerable`1[WebApplication1.Controllers.Person]'. I looked at the documentation and their suggestion is to use [Queryable] on

Applying Distinct to OData query

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问题 I want to get a list of distinct values from my OData endpoint. But distinct or group by isn't supported yet. My URI query looks something like this GET /odata/Products?$select=foo & $top=10 & $count=true & distinct=true My Controller [EnableQuery] public IQueryable<FooBarBaz> Get(ODataQueryOptions<FooBarBaz> queryOptions, bool distinct) { //I've tried the following return Repository.AsQueryable().Distinct(); // and return Repository.AsQueryable().GroupBy(x => x.Foo); // and IQueryable query

CUDA ---- Branch Divergence and Unrolling Loop

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Avoiding Branch Divergence 有时，控制流依赖于thread索引。同一个warp中，一个条件分支可能导致很差的性能。通过重新组织数据获取模式可以减少或避免warp divergence（该问题的解释请查看warp解析篇）。 The Parallel Reduction Problem 我们现在要计算一个数组N个元素的和。这个过程用CPU编程很容易实现： int sum = 0; for (int i = 0; i < N; i++) sum += array[i]; 那么如果Array的元素非常多呢？应用并行计算可以大大提升这个过程的效率。鉴于加法的交换律等性质，这个求和过程可以以元素的任意顺序来进行：将输入数组切割成很多小的块。用thread来计算每个块的和。对这些块的结果再求和得最终结果。数组的切割主旨是，用thread求数组中按一定规律配对的的两个元素和，然后将所有结果组合成一个新的数组，然后再次求配对两元素和，多次迭代，直到数组中只有一个结果。比较直观的两种实现方式是： Neighbored pair：每次迭代都是相邻两个元素求和。 Interleaved pair：按一定跨度配对两个元素。下图展示了两种方式的求解过程，对于有N个元素的数组，这个过程需要N-1次求和，log(N)步。Interleaved pair的跨度是半个数组长度

SAP Odata filter的语法

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OData grammar - 语法 https:///sap/c4c/odata/cust/v1/zjerrytestodataservice/TestBORootCollection?$filter=AgreementID eq ‘A1’ https:///sap/c4c/odata/v1/c4codata/OpportunityCollection?$filter=UUID eq guid’00163E02-944F-1ED1-A6E2-F7D247603D12’ 来源： CSDN 作者：汪子熙链接： https://blog.csdn.net/i042416/article/details/103933044

Web API 2: OData 4: Actions returning 404

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问题 I have an OData v4 action method which is not working; note however that it was working fine in OData v3 (I am obviously in the process of trying to update my project) OData Action Method: [HttpPost] public Translation Translate(ODataActionParameters parameters) { // Implementation } Configuration: ODataModelBuilder builder = new ODataConventionModelBuilder(); builder.EntitySet<Page>("Pages"); //etc (Other Entity Sets) var pageEntityType = builder.EntityType<Page>(); var translateAction =

Parsing Data in Xamarin Forms

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问题 I would like to get the names in collection href(CustomerDemographics, Customers, Employees, Order Details) to populate a listview. I would like to know how to parse these information in Xamarin platform or C#. I am quite new on this environment. I have experience how to parse json data in native ios with objective c, but it is the first time I see this type of data. 回答1: From the attached image it seems that you're requesting the service document of the OData service. Namely the http://host

Parsing Data in Xamarin Forms

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is it possible to Query an Odata service and expand Child of Child entities?

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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

How to implement Self-host WCF data services (http://localhost:1234/myDataService.svc/…)

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问题 I have a project that needs to implement WCF data services (OData) to retrieve data from a control system (.NET Framework Application). The WCF data service needs to be hosted by the .NET application (No ASP.NET and NO IIS). I have seen many WCF Data Service examples recently; they are all hosted by ASP.NET application. I also see the self-host (console application) examples, but it is for WCF Service (not WCF Data Service). It is possible to have a standalone .NET Applications to host WCF