16,022,752 members
Sign in
Sign in
Email
Password
Forgot your password?
Sign in with
home
articles
Browse Topics
>
Latest Articles
Top Articles
Posting/Update Guidelines
Article Help Forum
Submit an article or tip
Import GitHub Project
Import your Blog
quick answers
Q&A
Ask a Question
View Unanswered Questions
View All Questions
View C# questions
View C++ questions
View Visual Basic questions
View Javascript questions
View .NET questions
discussions
forums
CodeProject.AI Server
All Message Boards...
Application Lifecycle
>
Running a Business
Sales / Marketing
Collaboration / Beta Testing
Work Issues
Design and Architecture
Artificial Intelligence
ASP.NET
JavaScript
Internet of Things
C / C++ / MFC
>
ATL / WTL / STL
Managed C++/CLI
C#
Free Tools
Objective-C and Swift
Database
Hardware & Devices
>
System Admin
Hosting and Servers
Java
Linux Programming
Python
.NET (Core and Framework)
Android
iOS
Mobile
WPF
Visual Basic
Web Development
Site Bugs / Suggestions
Spam and Abuse Watch
features
features
Competitions
News
The Insider Newsletter
The Daily Build Newsletter
Newsletter archive
Surveys
CodeProject Stuff
community
lounge
Who's Who
Most Valuable Professionals
The Lounge
The CodeProject Blog
Where I Am: Member Photos
The Insider News
The Weird & The Wonderful
help
?
What is 'CodeProject'?
General FAQ
Ask a Question
Bugs and Suggestions
Article Help Forum
About Us
Search within:
Articles
Quick Answers
Messages
Use my saved
content filters
Ask a Question
All
Questions
All
Unanswered
FAQ
asp.net, ado.net, c# question
Please
Sign up or sign in
to vote.
5.00/5 (1 vote)
See more:
(untagged)
Hello, I'm relatively new to c# and even newer to asp.net and ado.net.
I'm trying to improve my skills in the asp.net and ado.net areas.
I'm working on an a sample app where I want to display items in a web page based on what the user has selected from a drop-down list.
A couple of questions I have while on this learning path:
1 -Are all database queries and "presentation" done within the .aspx files, or are some done in the .cs files?
Thanks in advance.
---------
Jeff
Posted
8-Apr-09 11:17am
jboyd111
Add a Solution
2
solutions
Top Rated
Most Recent
Please
Sign up or sign in
to vote.
Solution 1
Accept Solution
Reject Solution
Good question. In fact, your database queries SHOULD come from a seperate dll which encapsulates DB code. Microsoft have added ways to do database stuff in the ASPX, but no-one uses them except hobbyists and people who don't know/don't care about writing good code. You should run from any control that has you typing SQL into your aspx. You should try to wrap your database code into a seperate layer. Ideally, your database layer would not return database objects but take and return lists of classes in your project.
Permalink
Share this answer
Posted
8-Apr-09 11:26am
Christian Graus
Please
Sign up or sign in
to vote.
Solution 2
Accept Solution
Reject Solution
Jeff,
I like to break my design into three layers
1. Presentation
2. Business Logic
3. Database
1. In presentation layer I put only those that are of UI related. This will go directly into the aspx pages, user controls (usually I create on separate dll) and any UI related logic
2. Database. This is strictly database related classes. NO other code belongs here.
3. In business logic goes any middle-ware code that does not belong to any of the two categories.
Now, notice how I said 'This goes to separate dll' in the first case. I don't go crazy in creating many dlls. The rule of thumb I use is, if the code can be reused somewhere else, then I create it in its logical dll, so I can easily take it to another project and reused. That means the other layers may have multiple dlls as well.
Again, there are projects I have worked which they have only 2 layer or more than 3 layers. It does not have to be only 3 layers. The scope of the project will decide how you want to break your logical designs. In some cases you may be able to get away with single layer.
Permalink
Share this answer
Posted
8-Apr-09 12:38pm
Yusuf
Add a Solution
Add your solution here
B
I
U
S
small
BIG
code
Plain Text
ASM
ASP
ASP.NET
BASIC
BAT
C#
C++
COBOL
CoffeeScript
CSS
Dart
dbase
F#
FORTRAN
HTML
Java
Javascript
Kotlin
Lua
MIDL
MSIL
ObjectiveC
Pascal
PERL
PHP
PowerShell
Python
Razor
Ruby
Scala
Shell
SLN
SQL
Swift
T4
Terminal
TypeScript
VB
VBScript
XML
YAML
var
<
>
&
link
[^]
encode
untab
case
indent
outdent
OK
Paste as
Strip HTML
Encode HTML
Paste as-is
Code block
Quoted Text
Best guess
To display as
The content must be between 30 and 50000 characters.
Treat my content as plain text, not as HTML
Preview
0
…
Existing Members
Sign in to your account
...or Join us
Download, Vote, Comment, Publish.
Your Email
Password
Forgot your password?
Your Email
This email is in use. Do you need your
password
?
Optional Password
I have read and agree to the
Terms of Service
and
Privacy Policy
Please subscribe me to the CodeProject newsletters
Submit your solution
When answering a question please:
Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or
edit the question
and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.
Let's work to help developers, not make them feel stupid.
Top Experts
Last 24hrs
This month
Richard Deeming
95
Dave Kreskowiak
78
Pete O'Hanlon
20
Rahul VB
10
Espen Harlinn
5
Richard Deeming
335
Pete O'Hanlon
310
OriginalGriff
150
merano99
130
Dave Kreskowiak
113
Related Questions
asp.net and ado.net questions
Interview Questions on .net, sql server, asp.net, ado.net for 2 years of experience
store procedure in asp.net mvc3 using ado.net
Silverlight and ADO.Net Entity Framework
ADO.NET issue in my application.
Which is suitable for performance use entity framework core or ADO.NET?
ado.net question on combo box
ADO.Net Entity Framework
ado.net entitydata model
DATADIRECT® CONNECT FOR ADO.NET
CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900