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In LINQ to Objects, myCollection.Cast<MyType>().First() will cast the entire collection or just the first element?
by Niels Kloster in Programming Languages

I want to know whether the Cast() operation is performed on the entire IEnumerable<T> or just on the filtered portion or it.


cast error->System.Windows.Forms.DataGridViewSelectedCellCollection' does not contain a definition for 'Cast'
by Europe in Programming Languages

hi friend i m getting that error can any one plz help


'System.Windows.Forms.DataGridViewSelectedCellCollection' does not contain a definition for 'Cast' and no extension method 'Cast' accepting a first argument of type 'System.Windows.Forms.DataGridViewSelectedCellCollection' could be found (are you missing a using directive or an assembly reference?)


List<TEntity>.Cast<BusinessObject>() fails when implicit cast exists
by rbonestell in Databases

I get an InvalidCastException converting a linq entity list to a businessobject list using the .Cast<> operator.
"Unable to cast object of type 'Ticketing.ticket' to type
'Ticketing.ModelTicket'." (namespace name was changed because underscore was causing unneeded formatting)


here's my business object class


public sealed class ModelTicket
{
pu

How to solve cast issue java.lang.ClassCastException: $Proxy cannot be cast to NotEmpty wich is annotation
by Liy in Java

i have REST service project integrated with spring.
I am trying to integrate bean validation.
i have done a custom annotation:


/**
* Denotes a field as being no empty.
*
* @author pguzun
*/
@Target({METHOD, FIELD, ANNOTATION_TYPE})
@Retention(RUNTIME)
@Constraint(validatedBy = {INotEmptyValidator.class})
public @inter

How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
by Henry in Databases

In postgres I have a table with a varchar column. The data is supposed to be integers and I need it in iteger type in a query. Some values are empty strings.
The following:


SELECT myfield::integer FROM mytable

yields ERROR: invalid input syntax for integer: ""


How can I query a cast and have 0 in case of error during the cast in


Cast from Void* to TYPE* using C++ style cast: static_cast or reinterpret_cast
by clifton anderson in C & C++ & C#

So if your converting from Void* to Type* or from Type* to Void* should you use:


void func(void *p)
{
Params *params = static_cast<Params*>(p);
}

or


void func(void *p)
{
Params *params = reinterpret_cast<Params*>(p);
}

To me static_cast seems the more correct but I've seen b


Is there any way to cast needed class object to another at runtime without direct cast in .net?
by eastcoastj in Programming Languages

For example, i have this:


class BasePacket
{
int header;
int type;
}
class ChildPacket1 : BasePacket
{
//...
}
class ChildPacket2 : BasePacket
{
//...
}
BasePacket bp;
Type t;
object obj = CreateNeededChildPacket(out t); //return one of childs as object and it's real type
bp = ...// anyway

Invaid cast exception, even when I have an implicit cast operator defined (in asp mvc app)
by swassbac in ASP & ASP.net

I have an mvc model class created and one of the properties is of type 'MyObject'. It also has a System.ComponentModel.DataAnnotations.StringLength attribute on it.


MyObject as implicit cast operators so it can essentially be used as a string:


public static implicit operator string(MyObject o){...}
public static implicit operator MyObject(string sValue){...}

Generic covariant cast or cast to real type
by gamefreakgcb in Programming Languages

Trying to build a CQRS solution, I have the following code trying to find a Handler and then invoke a Handle() method.


The code below works but it's annoying to use reflection when we know that all IHandleCommand<> have a Handle method, this could be resolved at compiletime, I belive!


Do I have to use dynamic in some way?


public void SendCo

How to Wrap Your Own Body Cast With a Gypsona Plaster Cast
by Paul J Warner in Hobbies, Games & Toys
Before you create a body cast from Gypsona bandages, there are some things to consider. First, plaster gives off heat as it sets and dries. This means a full-body cast should not done all at the same time; either cast your front and back separately or cast whole limbs one at a time. It will take about two to three people to make a body casting: one person to be the model and at least one more to a

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