Dynamic object creation with choice of constructor

[Nak]

Hi there,

I'm using Activator.CreateInstance to create an object from a string,
unfortunately it requires that I have a constructor with no parameters (at
least I presume)

I was wondering if anyone knew how to do the following.

A) Create a type object from a string
B) Create an instance of this type using a constructor with
parameters

Thanks loads in advance!!!!!

Nick.

[Herfried K. Wagner [MVP]]

"Nak" <[e-mail]> schrieb:

A) Create a type object from a string
For example:

\\\
Private Function CreateClassByName( _
ByVal PartialAssemblyName As String, _
ByVal QualifiedClassName As String _
) As Object
Return _
Activator.CreateInstance( _
[Assembly].LoadWithPartialName( _
PartialAssemblyName _
).GetType(QualifiedClassName) _
)
End Function
///
B) Create an instance of this type using a constructor with
parameters

Notice that 'CreateInstance' is overloaded:

..NET Framework Class Library -- 'Activator.CreateInstance Method (Type,
Object[])'
<URL:http://msdn.microsoft.com/library/en-us/cpref/html/frlrfsystemactivatorclasscreateinstancetopic4.asp>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[Nak]

Hi Herfried,

Excellent! Cheers for the help! :-)

Nick.

"Herfried K. Wagner [MVP]" <hi***************@gmx.at> wrote in message
news:Or**************@TK2MSFTNGP12.phx.gbl...

"Nak" <[e-mail]> schrieb:

A) Create a type object from a string

For example:

\\\
Private Function CreateClassByName( _
ByVal PartialAssemblyName As String, _
ByVal QualifiedClassName As String _
) As Object
Return _
Activator.CreateInstance( _
[Assembly].LoadWithPartialName( _
PartialAssemblyName _
).GetType(QualifiedClassName) _
)
End Function
///

B) Create an instance of this type using a constructor with
parameters

Notice that 'CreateInstance' is overloaded:

.NET Framework Class Library -- 'Activator.CreateInstance Method (Type,
Object[])'
<URL:http://msdn.microsoft.com/library/en-us/cpref/html/frlrfsystemactivatorclasscreateinstancetopic4.asp>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>