Cast lambda in delegate

Cast lambda in delegate

Content Index :

Cast lambda in delegate
Tag : chash , By : appdelivery
Date : November 25 2020, 09:00 AM

this one helps. Generally spoken, the compiler is confused about the type of the lambda expression. Either cast it or use a constuctor to clarify. But in this case Where is in fact an extension method to IEnumerables, defined in the class Enumerable (note the difference!). Change your code as follows:
Contexte contexte = new Contexte();
var listField = contexte.GetType().GetField("<offre_Stages>_k__BackingField", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
// either:
IEnumerable<OS> fldVal = (IEnumerable<OS>)listField.GetValue(contexte); // don't use ``dynamic`` as we know it's an ``IEnumerable`1``
fldVal.Where(os => os.id == 1);
// or:
dynamic fldVal = listField.GetValue(contexte);
Enumerable.Where((IEnumerable<OS>)fldVal, os => os.id == 1); // explicit call to the extension method

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

Why must a lambda expression be cast when supplied as a plain Delegate parameter

Tag : chash , By : Waynew
Date : March 29 2020, 07:55 AM
should help you out A lambda expression can either be converted to a delegate type or an expression tree - but it has to know which delegate type. Just knowing the signature isn't enough. For instance, suppose I have:
public delegate void Action1();
public delegate void Action2();


Delegate x = () => Console.WriteLine("hi");
public static void Invoke(this Control control, Action action)
    control.Invoke((Delegate) action);

Is it possible to cast a delegate instance into a Lambda expression?

Tag : chash , By : barefootChild
Date : March 29 2020, 07:55 AM
it fixes the issue Everywhere that you're using the term "lambda expression" you actually mean "expression tree".
A lambda expression is the bit in source code which is
parameters => code
x => x * 2

cast delegate type to Delegate and call EndInvoke

Tag : chash , By : boonchew
Date : March 29 2020, 07:55 AM
should help you out You can use reflection to access the EndInvoke() method of the delegate:
using System.Reflection;

private void MonitorTasks(Delegate theDelegate, List<IAsyncResult> returnTags) 
    MethodInfo endInvoke = theDelegate.GetType().GetMethod("EndInvoke",
        new Type[] { typeof(IAsyncResult) });
    foreach (IAsyncResult returnTag in returnTags) {
        MessageType message = (MessageType) endInvoke.Invoke(theDelegate,
            new object[] { returnTag });

Type Cast error from lambda to delegate

Tag : chash , By : Thaweesak Suksuwan
Date : March 29 2020, 07:55 AM
around this issue New answer with edited question
The problem is that your lambda expression isn't valid - you're trying to use collection initializer syntax, but your type isn't a collection. So instead of this:
() => new t_user_audit { client.GetAudit(10) }
() => new List<t_user_audit> { client.GetAudit(10) }
public t_User GetAudit(int something)
lazyList = new Lazy<List<t_User>>(() => new List<t_User> { client.GetAudit(10) });
lazyList = new Lazy<List<t_User>>(() => client.GetAudit(10).ToList());

If we can assign a Lambda expression to a delegate type .Does Lambda expression converted to a delegate internally

Tag : development , By : rhyhann
Date : March 29 2020, 07:55 AM
Related Posts Related QUESTIONS :
  • Queryfilter on ApplicationUser in OnModelCreating in ApplicationDbContext creates StackOverflowException
  • How to get record form a different table based on a value from first table with linq expression?
  • Show data in Grid from returned model
  • Using Attributes to Override Data Model Conventions
  • Basic OOP console calculator, result Error
  • Compositon and Repository pattern
  • Multiple using statements with if condition
  • How do i increase a number by 1 in every line that contain the number 1
  • Add binding to elements that are created in codebehind
  • How to add a column in an existing AspNetUsers table
  • Order a list of elements with another list of doubles
  • How to setup a NuGet package to copy content files to output build directory?
  • In SignalR Core using ChannelWriter: Do I need to call TryComplete twice if there's an exception?
  • C# GetProcessesByName: issue with colon
  • c# wpf | create complex object with user-defined name to Serialize into JSON
  • How can I get a instance of a generic list with reflection?
  • WPF XAML - Design time and visibility of textbox
  • EF Core and MySql query is too slow
  • Getting Registered App Display Name from an App Id
  • How to get all variables from a string
  • Delete entity with all childs connected
  • Azure Build agent cant´t find class library referance
  • Initialize Nested Dictionaries in c#
  • .Net Core Binding
  • Generic event test method, preventing code duplication
  • How do I keep the ellipses in the center when the screen is resized
  • How to require a property using JsonSchema.NET?
  • C# XDocument Element/Elements returns null
  • Autofac keyed service with IEnumerable relationship type
  • Installing EntityFramework via NuGet manager
  • Always Check if there is Internet Connection Xamarin forms
  • WCF OneWay service slows down when aspNetCompatibilityEnabled is set to false
  • Can we use JsonRequestBehavior.AllowGet with [HttpPost] attribute?
  • How to customize the Setup wizard with custom forms in Visual Studio setup project
  • C# ASP.NET - Use method from another class to create labels
  • C# List IList or IEnumerable as argument
  • Parsing File with C# And Replace method
  • Losing special unicode characters in encryption (C#)
  • Getting stored procedure returned value instead of row affected
  • How can I construct HTML using NameValuePair in android?
  • Loading a pop up page in ASP.net through a js file
  • How to pass alert or notification message from controller to View?
  • C# to pause, turn on ssas server, backup cube.... how to?
  • How to execute DataTable.Select() for a column of custom class type for a particular element in that C#
  • how to connect mysql8.0 with C#
  • Passing incorrect values into MultiValueConverter by MultiBinding
  • Can i use IEnumerator as Update func?
  • How to convert API Json response to C# Array?
  • Blazor Textfield Oninput User Typing Delay
  • Performing both layout and render transform results in wrong output
  • uwp beforetextchanged cursor moving in front of text
  • How to keep duplicates from a string[] exclude words from a List and print them out
  • .Net Core Strings.Asc/Mid/Chr/Len missing even after importing Microsoft.VisualBasic
  • How to return to previous search page without being asked to Confirm Form Re-submission and keeping the results on ASP.N
  • How set a identity scaffolding item/page how initial page in asp.net MVC core?
  • LINQ isn't calling Dispose on my IEnumerator when using Union and Select, expected behavior or bug?
  • What is "ByteArray.uncompress()" in AS3 equivalent to in C#?
  • Getting a specific letter from a string variable for my simple guessing game for clues
  • Send an email with Outlook without a subject --- dialog box issue
  • passing List<MyModel> from my controller in the "WebInterfaceProject" to the processor method in "D
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com