Modular programming with silverlight is a really interesting topic. Because, Modularizing a program plays a very important role while developing rich internet applications. As applications grow, there could be possibilities of performance hit due to not handling correctly.
So, I tried to elaborate it here.
Step 1:
Create a Silverlight 4 application and I have named it as ARVTestModuleLoading
Step 2:
Add a Class library application to the ARVTestModuleLoading solution and I have named
it here as ARtModule.
I have added one more class called ARVClass. Also I have wrotten one method
called "GetName"
So, here my intention is to call this method using a load-on-demanad method.
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
///<Summary>
///Author:Aravind
///Module:ArvClass
///Created
On:
///Modified
On:
///Modified
By:
///</Summary>
namespace
ARVModule
{
//Class to have some data which will be accessed
from other class.
public class ArvClass
{
public string
GetName()
{
return "Arvind
does't run behind the money, Money runs behind Aravind";
}
}
}
Step 3:
Build this application. Once you build the application, dll will be created
under bin folder(ARVModule).
Step 4:
Create one folder called "Control" and copy ARVModule.dll to that folder.
Step 5:
In ARVTestModuleLoading Silverlight application, write a code for load assembly
dynamically.
Copy the "ARVModule.dll" path(it should be URl) as given bellow. Here, I have
found like this http://localhost:49805/Control/ARVModule.dll
using
System;
using
System.Collections.Generic;
using
System.Linq;
using System.Net;
using
System.Windows;
using
System.Windows.Controls;
using
System.Windows.Documents;
using
System.Windows.Input;
using
System.Windows.Media;
using
System.Windows.Media.Animation;
using
System.Windows.Shapes;
using
System.Reflection;
///<Summary>
///Author:Aravind
///Module:MainPage
///Created
On:
///Modified
On:
///Modified
By:
///</Summary>
namespace
ARVTestModuleLoding
{
public partial class MainPage
: UserControl
{
public MainPage()
{
InitializeComponent();
var WbClnt = new WebClient();
WbClnt.OpenReadCompleted += (a, b) =>
{
if (b.Error ==
null)
{
AssemblyPart assmbpart = new AssemblyPart();
Assembly assembly = assmbpart.Load(b.Result);
Object Objclss = assembly.CreateInstance("ARVModule.ArvClass");
//Type type =
System.Reflection.Assembly.LoadFrom(assembly.ManifestModule.ToString()).GetType(assembly.ManifestModule.ToString()+"."+"ArvClass");
if (Objclss != null)
{
//Calling method name.
MethodInfo
ob= Objclss.GetType().GetMethod("GetName");
object obsmsg= ob.Invoke(Objclss, null);
MessageBox.Show(obsmsg.ToString());
}
}
};
WbClnt.OpenReadAsync(newUri("http://localhost:49805/Control/ARVModule.dll",UriKind.Absolute));
}
}
}
Basically, here it will load the assembly first and then create' instance of
that assembly. GetMethod returns method info of the given method. If we doesn't
know the method name, then we can use GetMethodNamee() method which returns all
the method's info.
Invoke accepts two parameters. One is object which contains that method and
other one is parameter.
Step 6:
Run the Silverlight application. You will get alert message.
