.Net Framework
Introduction
Hagay Lupesko
Microsoft consulting student
Microsoft-Israel
Agenda
• Introduction to .Net
• CLR - Common Language
Runtime.
• WinForms.
• ADO.NET
Agenda
• Introduction to .Net
• CLR - Common Language
Runtime.
• WinForms
• ADO.NET
Introduction to .Net
Why develop a new platform?
• Inter-Platform communication – almost
impossible.
• DLL-Hell – Deployment and versioning
conflicts.
• Security threats.
• Dynamic web programming –
complicated, slow, “ugly”.
Conclusion: No adequate platform for
network oriented computing.
Introduction to .Net
The .Net vision
Make information available
anytime, anywhere.
Introduction to .Net
.Net Main Features – realizing the vision.
• Managed Run Time Environment (CLR) – manages
code, memory, security, threading.
• Inter-Language development –all .Net languages are
compiled to MSIL – the .Net assembly.
• Strong support for network standards: Http, XML,
SOAP, WSDL, and more.
• Built in support for Web-Services.
• ASP.NET – Easy and efficient development of
dynamic web apps.
• WinForms – Easy GUI development.
• Surly I left something out…
Agenda
• Introduction to .Net
• CLR - Common Language
Runtime.
• WinForms
• ADO.NET
The CLR
Compilation
Source code Assembly
Compiler
Csc.exe / Vbc.exe
C++, C#, J#, / Cl.exe / Vjc.exe DLL or EXE
Visual Basic or
any .NET
language
csc /target:library CSClass.cs
The CLR
Assembly
CSClass.DLL
Metadata
IL
Managed
code
Resources
The CLR
Compilation
Compiling, ILDASM, IL
D:\Program Files\Microsoft Visual Studio .NET\FrameworkSDK\Tool Developers Guide\docs\Partition III CIL.doc
The CLR
Components
Thread Support COM Marshaler
Type Checker Exception Manager
Security Engine Debug Engine
IL to Native Code Garbage
Compilers Manager Collector
Class Loader
The CLR
The execution model
Source VB C# C++
code
Unmanaged
Compiler Compiler Compiler
component
Managed Assembly Assembly Assembly
code IL code IL code IL code
Common language runtime
JIT compiler
Native code
Operating system services
The CLR
Compilation
Inter-Lang Inheritance
The CLR
Intermediate Language (IL)
• Object Oriented
– Single inheritance
– Multiple implementation of Interfaces
• Value Types Vs. Reference Types
• Operations performed on Virtual Stack
The CLR
Example
.method private static void Main(string[] args) cil managed
{
.entrypoint
.maxstack 3
.locals init (int32 V_0, int32 V_1, int32 V_2)
ldarg.0
ldc.i4.0
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
ldarg.0
ldc.i4.1
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
add
call void [mscorlib]System.Console::WriteLine(int32)
ret
} // end of method Greeter::Main
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.0
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
//… code omitted for clarity
args
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.0
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
//… code omitted for clarity
0
args
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.0
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
//… code omitted for clarity
“23”
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.0
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
//… code omitted for clarity
23
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.1
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
add
call void [mscorlib]System.Console::WriteLine(int32)
ret
args
23
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.1
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
add
call void [mscorlib]System.Console::WriteLine(int32)
ret
1
args
23
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.1
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
add
call void [mscorlib]System.Console::WriteLine(int32)
ret
“32”
23
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.1
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
add
call void [mscorlib]System.Console::WriteLine(int32)
ret
32
23
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.1
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
add
call void [mscorlib]System.Console::WriteLine(int32)
ret
55
Virtual Stack
The CLR
Example
//… code omitted for clarity
ldarg.0
ldc.i4.1
ldelem.ref
call int32 [mscorlib]System.Int32::Parse(string)
add
call void [mscorlib]System.Console::WriteLine(int32)
ret
Virtual Stack
The CLR
Opening MS source code
Why do that?
• In-depth Understanding of features and
classes.
• Improvement of algorithms.
• Debugging “VOODOO” problems.
• Find bugs.
• Pure fun…
The CLR
Opening MS source code
• Anakrino: Can be found at
www.saurik.com -including source!
• Other companies do the same (but
for money…)
• It’s not perfect.
• Maybe you can make it better???
The CLR
Opening MS source code
Revealing .Net Base Classes Source code
Agenda
• Introduction to .Net
• CLR - Common Language
Runtime.
• WinForms
• ADO.NET
WinForms
What do we gain?
• Simple Event driven programming model
• Rich GUI control classes – Over 30
• Fast & Easy GUI building
• Simple deployment – Just use xcopy…
• Programmers can focus on the Program’s
logic!
WinForms
Building first WinForm using
NotePad
WinForms
Event Driven Programming Model
EventHandler – a method that is bound to an
event (button click / mouse over …)
• Signature:
void button1_Click(object sender, System.EventArgs e)
• When the event is fired – the methods are
invoked.
• Multiple EventHandlers can be
dinamically assigned to an event.
WinForms
Adding event handling to our WinForm
WinForms
Developing with VisualStudio.NET
Building a diary using VisualStudio .Net
Agenda
• Introduction to .Net
• CLR - Common Language
Runtime.
• WinForms
• ADO.NET
ADO.NET
Basic View
Main classes:
•DataAdapter – a proxy to the SQL server
•DataSet – mini-db at your fingertips
•DataGrid – Allows GUI of the DataSet
ADO.NET
Basic View
DataAdapter
SelectCommand Database
InsertCommand
UpdateCommand
DeleteCommand
TableMappings
DataSet
ADO.NET
Basic View
Building ADO.NET application
.Net Framework
Building a rich client using VisualStudio .Net