Now query the above result using LINQ. Example: DataRow _dataRow0, _dataRow1, _dataRow2, _dataRow3, _dataRow4, _dataRow5; DataTable _datatable = new DataTable(); _datatable.Columns.Add("Name"); _datatable.Columns.Add("ID"); _datatable.Columns.Add("Paid"); _datatabl...
Rich Querying API: Explicit Join Syntax (In addition to standard LINQ join syntax) CTE Support Bulk Copy/Insert Window/Analytic Functions Merge API Extensibility: Ability to Map Custom SQL to Static Functions See Github.io documentation for more details. Code examples and demos can be found he...
In this article we show how to group data in C# with LINQ queries. Language-Integrated Query (LINQ) is a domain-specific language for querying data from various data sources, including arrays, lists, XML files, or databases. Thegroup,by, andintokeywords are used to group data in LINQ. It...
Rich Querying API: Explicit Join Syntax (In addition to standard LINQ join syntax) CTE Support Bulk Copy/Insert Window/Analytic Functions Merge API Extensibility: Ability to Map Custom SQL to Static Functions See Github.io documentation for more details. Code examples and demos can be found he...
The data source must be a LINQ provider as described in the topic Enabling a Data Source for LINQ Querying. This approach is limited to a specific data source instance, but requires much less coding. If the schema of the data source changes, the data provider must be up...
Entity Framework Core uses Language-Integrated Query (LINQ) to query data from the database. LINQ allows you to use C# (or your .NET language of choice) to write strongly typed queries. It uses your derived context and entity classes to reference database objects. EF Core passes a ...
http://www.powerxrm.com/querying-crm-data-with-linq/如果不喜欢看SDK中的示例,这篇里面讲的非常详细,值得一看。
As you can see, querying with Criteria can be less intuitive than using HQL and LINQ. It requires careful consideration of what to do and may require doing things in several steps, perhaps resorting to additionalDetachedCriteriaobjects. The resulting code is normally longer and harder to follow....
http://blogs.msdn.com/adonet/archive/2007/01/26/querying-datasets-introduction-to-linq-to-dataset.aspx Monday, December 1, 2014 4:10 PM If you need an EF 6.1 provider for MS Access you can have a look here https://jetentityframeworkprovider.codeplex.com/ ...
usingvardb=newBloggingContext();// Inserting data into the databasedb.Add(newBlog{Url="http://blogs.msdn.com/adonet"});db.SaveChanges();// Queryingvarblog=db.Blogs.OrderBy(b=>b.BlogId).First();// Updatingblog.Url="https://devblogs.microsoft.com/dotnet";blog.Posts.Add(newPost{Title...