2019-11-11I have a table with three columns i want to use self join and retrieve the columns with alias name. TableMaterialIDNameMaterialParentID public ListMaterial GetMaterialList ListMaterial materilaList new ListMaterial var query from c1 in db.Materials join c2 in db.Materials on c1.ID equals c2.MaterialParentID select c2 return query.ToList
2020-5-18Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. Group collections by their elements property. Ask Question Asked 7 years 6 months ago. Active 5 years I have a collection for each of transaction type
Read MoreThe dynamic type has been added to C since C 4.0 .NET 4.5 and its main purpose is to bypass the static type checks and add more flexibility to the language. In this article we are going to go through the basic concepts of dynamic type learn how it works and what we can do with it
Read MoreThe reason you were getting the following error The entity or complex type NameSpace.Domain.Concrete.Metric cannot be constructed in a LINQ to Entities query. is that EF was returning a Metric object and you in your query were asking it to create an object of the same type Metric and assign to one of its field the value from the Metric
Read MoreExcept the version with as wont throw an exception when it fails to cast your query object which is an IQueryableT where T is an anonymous type to an IEnumerableDataRow which it isnt. Unfortunately there is no built-in method that Im aware of that will take an enumerable of a concrete type like your anonymous type in this example
Read More2013-9-16.cs-file.doc.net.net-1.0.net-1.1.net-2.0.net-3.0.net-3.5.net-4.0.net-4.5.net-assembly.net-cf-3.5.net-framework-version.net-micro-framework.net-reflector.net-remoting.rdlc.wav 2-way-object-databinding 2d 2d-array 2d-games 3-tier 32-bit 32bit 32bit-64bit 3d 3des 3g 3gp 3rd-party 3rd-party-library 64bit 7ip a-star abaddressbook abcpdf
Read More2018-4-20type. It can plainly see the signature we desire but there is no concrete delegate type the compiler can see. It could create an anonymous type of type delegate for us but it does not work like that. Line 2 does not compile for a similar reason. Even though the
Read MoreAnyone with the same problem With the solution for it maybe Does MediaElement depend on anything other Btw. the video I am trying to play works fine in Media Player 9.0 installed. Tag LINQ Project General Linq Iquerable and anonymous types Visual Studio 2008 5 Kevins Bag o Tricks Change InfoTextBox to password type Hi
Read MoreRemember anonymous types are internal which means their properties cant be seen outside their defining assembly. Youd better pass dynamic object instead of anonymous one to your View by converting anonymous type to dynamic using an extension method.. public class AwesomeController Controller Other actions omitted public ActionResult SlotCreationSucceededstring email string
Read MoreBinding a DataGrid to a LINQ Anonymous Type Part 2 Tuple Alternative July 10 2011 June 23 2012 Jaider Aria No Comments There is a problem trying to display Anonymous Type on DataGrid Controls
Read More2018-11-27Deserialie an Anonymous Type. Deserialie a DataSet. Deserialie with CustomCreationConverter. Deserialie JSON from a file. Populate an Object. ConstructorHandling setting. ObjectCreationHandling setting. DefaultValueHandling setting. MissingMemberHandling setting. NullValueHandling setting
Read MoreGotchas in dynamic typing. The dynamic support in C is great but there are some tricky aspects which are worth knowing about because they can trip you up easily. If you come across any yourself please mail me to let me know and Ill add them to the list. Explicit interface implementation. Remember that when the execution-time compiler handles a dynamic expression it considers the actual
Read MoreC documentation Creating an instance of a Type. Example. The simplest way is to use the Activator class.. However even though Activator performance have been improved since .NET 3.5 using Activator.CreateInstance is bad option sometimes due to relatively low
Read MoreDynamic LINQ DLINQ is a LINQ extension provided in the VS 2008 Samples.Scott Guthrie provides a good overview here Dynamic LINQ Part 1 Using the LINQ Dynamic Query Library but the executive summary is that it implements certain query operations on IQueryable the non-generic variety with filtering grouping and projection specified with strings rather than statically-typed expressions
Read More2020-5-30To begin this example program creates an integer array of 3 elements on the managed heap. Then we invoke the Array.ConvertAll static method. You do not need to specify the type parameters as they are inferred statically.Static. Lambda The second argument to Array.ConvertAll is a lambda expression. The lambda returns the ToString method
Read More2018-10-13The variables differ in that v2 refers to an instance of an anonymous type. In CLR terms anonymous types are no different than any other type. What makes anonymous types special is that they have no meaningful name in your programming language the only way to create instances of an anonymous type is using the syntax shown above
Read MoreDataSource Controls How To Cast Concrete Type Created In LINQ Query To The Corresponding Interface Type May 3 2010. I have an Interface that has its concrete class defined via a factory. Because of this I found no way to use the Interface tpye directly in my LINQ quesry so I had to use the concrete class types to creat a generic list
Read More2020-5-20Generic Types. A Class Record or Interface can be generic if it operates on one or more types that are not specified in concrete when the type is defined.. Why Generics Generic types are best understood by comparing them to regular non-generic types and their limitations. For example one could implement a StringList as a regular class that can contain a list of Strings
Read More2020-6-7Comparison of C Sharp and Java. Language but provides fewer features and can lead to bugs if low-level value types are directly cast to an enumeration type as is allowed in the C language. e.g. in the form of an SQL where clause as is the case with e.g. Linq LINQ to SQL. Anonymous types and type inference supports capturing and
Read MoreModeling Databases Using LINQ to SQL Visual Studio Orcas ships with a LINQ to SQL designer that provides an easy way to model and visualie a database as a LINQ to SQL object model. In the SP example you put the results of the SP into an anonymous type but then you use a concrete type to iterate over the collection of anonymous types
Read More2020-5-29Now we can also define and add events to the ExpandoObject using the Action generic type. We will add two events LanguageChanged and CountryChanged. LanguageChanged will be added after defining the eventHandler variable to hold the ActionobjectEventArgs and CountryChanged we will add directly as an inline anonymous method
Read More2020-6-4How to Convert the Results of a LINQ Query to an Array. Use the ToArray method to create an array from results of a LINQ query. Calling ToArray also forces immediate execution of the query. The following example uses the ToArray method to immediately evaluate the query and convert the sequence into an array.. To run the code in this example you need a fluent model based on the Northwind
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