C#: INTRODUCTION

FOR DEVELOPERS

Neal Stublen

nstublen@jccc.edu

DEPLOYMENT

Practice Solution

Create a new solution Add a WinForms project Add a Class Library project Reference the library from the

WinForms project

XCopy

Simple file copy Dependencies must already be installed

(e.g. .NET Framework) Won’t install Start menu icons, etc.

Using XCopy Deployment Defaults of bin\Debug, bin\Release within

project folder $(SolutionDir), $(ProjectDir), etc.

http://msdn.microsoft.com/en-us/library/c02as0cs.aspx

$(SolutionDir)_Output\Debug\$(TargetFileName) $(SolutionDir)_Output\Release\$(TargetFileName) C:\Stage\$(SolutionName)\Debug\$(TargetFileName) C:\Stage\$(SolutionName)\Release\$

(TargetFileName)

ClickOnce

Install from a link on a web page Adds Start menu shortcuts, etc. Adds entry to Programs and Features

for changing and uninstalling the application

Automatic updates

Setup

Create a setup program to be run from the user’s computer

Install components to the GAC (global assembly cache)

Modify the registry Create a setup program when

ClickOnce is not adequate Discontinued after VS2010

WiX Toolset

Windows Installer XML Toolset Alternative to discontinued Setup

projects http://wixtoolset.org

USER CONTROLS

When To Use Them?

Create compound controls Create specialized controls with

modified behavior

User Control Properties Override UserControl properties [Browsable(true)] [EditorBrowsable(EditorBrowsableState.Always)] [DesignerSerializationVisibility

(DesignerSerializationVisibility.Content)] [Bindable(true)]

Code Practice Create a Label that turns into a TextBox

when clicked Create a User Control Library Add a Label to the form Add a TextBox to the form

Visible = false Override Text property of UserControl to

update Label Handle Click event to edit Label Text Handle Enter key to finish editing

Code Practice

Handle Escape key to cancel editing Handle loss of focus to cancel editing Create an event to signal a text change Ensure Text and TextChanged are

visible in the designer

EXTENSION METHODS

Extend Existing Classespublic static class Extensions{ public string ToTitleCase(string inText) { }

public int WordCount(string inText) { }}

string title = Extensions.ToTitleCase(title);int count = Extensions.WordCount(title);

Extend Existing Classespublic static class Extensions{ public static string ToTitleCase(this string inText) { }

public static int WordCount(this string inText) { }}

string title = title.ToTitleCase();int count = title.WordCount();

MULTIPLE THREADS

Thread Class Create a new thread to execute some background

task

Thread t =new Thread(new ThreadStart(ThreadProc_);

t.Start();// Do some other stuff...t.Join();

public static void ThreadProc(){}

Code Practice

Create a new project Create a method that will write the

numbers 1 to 10 to the console Create a secondary thread that will call

this method Start the thread Call the method on the primary thread Join the thread

Code Practice

Modify the method that writes to the console to update a shared integer value 100 times

Run the program and write the counter value to the console

lock Synchronization

The lock statement allows us to guard access to an object

Code Practice

Update the previous example to prevent concurrent access to the counter

BackgroundWorker The BackgroundWorker control provides a

way to add background functionality to a form

Handler to do work on a background thread Handlers to report progress and catch

completion IsBusy confirms background process is

running Call RunWorkerAsync() from primary thread

BackgroundWorker Progress

Call ReportProgress within DoWork handler

Cancel BackgroundWorker Call CancelAsync () from primary thread Check CancellationPending property

within DoWork handler Set Cancel property to true in

DoWorkEventArgs Exit DoWork handler

Code Practice

Create a BackgroundWorker that just updates a progress bar

Async Patternclass Example{ // Synchronous method call public bool LongMethod(string param);

// Asynchronous method call public void LongMethodAsync(string param); public event LongMethodCompletedEventHandler

LongMethodCompleted;}

MDI APPLICATIONS

Multiple Document Interface Word can be changed from SDI (all

documents appear on taskbar) to MDI (single taskbar icon)

Often replaced by separate top-level Windows or a tabbed interface (e.g. Visual Studio)

Using MDI

Set IsMdiContainer to true on parent form

Set MdiParent property on child forms at runtime

Parent’s ActiveMdi property indicates the currently active child form

Parent’s LayoutMdi property can arrange the child forms