Dot Net Tutorials

What is the purpose of .net frame work? 
.Net Framework is an umbrella technology and has a lot of different technologies under it. For example, it
1. introduces Asp.net for web development
2. has languages to write Windows program, Windows services, Web Services.
3. pre-coded solutions to common programming problems     called base class library. It includes user interface data accessdatabase connectivity cryptography web application development, numeric algorithms, and network communications
4. a runtime or virtual machine that manages the execution of programs written specifically for the framework,
5. and a set of tools for configuring and building applications  like visual studio.
It also introduces language independence by introducing common language runtime. You can write code in any language.
The .NET Framework is a key Microsoft offering and is intended to be used by most new applications created for the Windows platform.

What is the difference between visual basic and visual basic dot net?
VB.NET is Microsoft’s Visual Basic implemented onto their .NET Framework. While Visual Basic is part of Visual Studio, VB.NET is also part of the Visual Studio.NET release.

What is JIT(Just In Time) and How it works? 
Before the code can be executed,the .NET framework needs to convert the IL into CPU-specific code.the Just-In-Time(JIT) compiler translates the code from IL into managed native code.During the compilation,the JIT compiler compiles only the code that is required during execution instead of compiling the complete IL code.when an uncompiled method is invoked during execution,the JIT compiler converts the IL for that method into native code.during this  the code is also checked for type safety,Type safety ensures that objects are always accessed in a compilation way.

Crystal Reports

How to Pass string value to crystal report 11?
Code for this

Dim crParameterFieldDefinitions As ParameterFieldDefinitions
Dim crParameterFieldDefinition AsParameterFieldDefinition
Dim crParameterValues As New ParameterValues
Dim crParameterDiscreteValue1 As NewParameterDiscreteValue

crParameterDiscreteValue1.Value = Trim(tbPRAM.Text) — text box to hold value

crParameterFieldDefinitions =cryRpt.DataDefinition.ParameterFields()
crParameterFieldDefinition = crParameterFieldDefinitions.Item(”PRAM”)
crParameterValues =crParameterFieldDefinition.CurrentValues

crParameterValues.Clear()
crParameterValues.Add(crParameterDiscreteValue1)

crParameterFieldDefinition.ApplyCurrentValues(crPar ameterValues)

parameter PRAM must be set in your report.

How does VB.NET/C# achieve polymorphism? 
You can achive polymorphism by doing overloading and overwriting.