Transcript Introduction to C#

Introduction to C#
Tuc Goodwin
5/1/2020
1
Agenda
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Upcoming Schedule
Syntax Differences
Exiting programs/methods/loops
Member Scope
Conditional Statements
Indexes and Arrays
Control Characters
Loops
Inheritance
Overloading
Summary
Upcoming Schedule
Intro to C# (November)
 Debugging .NET 2.0 (December)
 Serializations (January)
 Object Thinking (February)
 ADO.NET Revisited (March)
Let’s look at some code!
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Syntax Differences
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Case Sensitivity
Line Termination
Comments
Namespace Declaration and Usage
Variable Declaration
Variable Initialization
Declaring Function Parameters
Exiting Programs/Methods/Loops
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VB.Net – End
VB/C# - System.Environment.Exit(1)
VB.Net – Exit For / Exit Function
C# - break;
C# - continue;
Member Scope
C#
VB.Net
Comments
public
Public
Default in VB
private
Private
Default in C#
internal
Friend
protected
Protected
protected internal
Protected Internal
C# vs. VB.Net
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Static vs. Shared
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static in C#
Shared in VB.Net
Classes vs. Modules
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class
Module
Conditional Statement
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VB.Net – If <condition> Then
:
Else
:
End If
C# - if( <condition>)
{
}
else
{
}
Operators || Short Circuiting
VB.Net
C#
Operator
And
&&
and
Or
||
or
Not
!
not
=
==
equals
<>
!=
not equal
if (DoTask() || DoTask2())
{
}
If DoTask() or DoTask2() Then…
Ternary Operators
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Visual Basic Immediate IF
IIF(true/false), value for true, value for false
C# (true/false clause)? Value for true: value for false;
Indexes and Arrays
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Indexes
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VB.Net use parenthesis (n)
C# use brackets [n]
Arrays
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string[] phones = {“1”,”2”,”3”};
phones = new string[3];
Loops
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for(int count=1, count < 20; count++)
{
}
for( string count=“”, count !=“done”;)
{
}
string[] names = new string[5];
foreach(string onename in names)
{…}
Control Characters
C# escape sequence
VB constant
Purpose
\n
Lf
New line
\r
Cr
Carriage return
\r\\n
NewLine or CrLf
Carriage return – new line
\*
Quote
Quotation marks
\\
\t
Backslash character
Tab
Tab
Type Comparison
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VB.Net – Ctype()
GetType()
C# - typeof()
Object Oriented - Inheritance
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Class Checking : Account
{
…
}
Class Checking Inherits Account
…
End Class
Object Oriented - Overloading
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public void MakeDeposit(int Amount){}
public void MakeDeposit(ref int Amount, int
AmountAvailable){}
Sub MakeDeposit (ByVal Amount as Integer)
End Sub
Sub MakeDeposit (ByVal Amount as Integer,
AmountAvailable as Integer)
End Sub
Summary
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We…
5/1/2020
17
Other Resources
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www.microsoft.com/net
msdn.microsoft.com/net
www.gotdotnet.com
support.microsoft.com/webcasts
www.dnug.net
www.devx.com/dotnet/
www.thedotnetmag.com
www.winnetmag.com
www.microsoft.com/mspress
Next Time…
We will continue to build from here…
Debugging .NET 2.0
5/1/2020
19
Questions?
5/1/2020
20