C# .Net 2005 Code Helper


	Computer Science 213

C# Code Snippets for Visual Studio 2005

When you need code for a specific job, then check out this list. Instead of scrounging around in your notes, I put some major code snippets here for you. In most cases they are copied from our C# classroom projects.

Forms	Change form background color or change form size at run time. Make ENTER key work like TAB How to launch a browser & go to URL
Data Entry	Managing Data Entry Issues Copy selected item in Listbox to a textbox How to concatenate strings Simple math operations (computing sales tax) How to display items & pricing as currency Data Validation How to use the ErrorProvider component Use the KeyDown & KeyPress events in validation How to use char.IsLetter or char.IsNumber Trapping user keystrokes Regular Expressions Some useful expressions
Event Handlers	Event Handler for Multiple Controls Handle multiple radio buttons in one click event
Using List Boxes	Add Item to list box Remove list box item Load list box with items & pricing information at design time Load List Box with Items & Pricing at run time Getting the list box items, pricing, & photo information Foreach Loop and listboxes Multi-select List boxes & For Loop Using two list boxes to select items
Menus & Windows Dialog Boxes	Using Drop-Down menus and Windows dialogs Using OpenFile Dialog Box
Using Controls	Web Browser control How to display image in a picture box
If , Switch, & Loops	Making Decisions Using YES-NO buttons on message box Intro to using Switch Loops For Loops (includes backwards & nested) Using While & Do Loops Getting a users PIN number Foreach Loop and listboxes Foreach loops and container controls
Formatting Strings	How to format numbers How to format data as currency How to create multi-line text in a label
Custom Methods	How to create custom methods (functions)
String Functions	How to use the TRIM function Using Substring instead of Left, Mid, Right
Variables	How to use module-level variables Using Totals & Counts with module-level variables Using variables to add contents of textboxes
Collections	foreach Loop using a list box foreach loop to find textboxes in the controls collection foreach loop for clearing textbox controls inside a container control
File I/O	StreamReader & StreamWriter Using Streams to read text file Read/Write to text file (includes Try-Catch & foreach loop) The Using Keyword: Working with "using" & StreamReader Working with "using" & StreamWriter
Classes	Introduction to Classes Part 1 Introduction to Classes Part 2
ADO Stuff	MS Access Textbox Validation and Databases A Text box Control Validation Class Read MS ACCESS DB using ADO in Code Use ACCESS DB & Grid to modify Records with a separate class for ADO objects SQL Database DataSources and SQL with error handling Read SQL DB using ADO in Code
Extras	Web Browser Working with the Web Browser Control Using the Process Component Progress Bar & Splash Screen Progress Bar controls a splash screen

C# Support

.Net Classes
C# Language Overview
C# operators
C# Keywords This lists the reserved or keywords of the C# language.
C# Data Types This lists the major data types we will be using.!
Quick Start Tutorials
Equivalent stuff in C# & VB
Training Videos
Tools
MSDN Chats
Books
WEB CASTS

Database Resources

The ADO Model
ADO Primer/examples
MS Access and ADO
SQL Server Books On Line (Excellent)
SQL Language tutorial
Formatting the grid control
Zip Code Database
How to handle Concurrency Errors

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