Create the database with LINQ - C# Discussion Boards

14-Oct-09 9:10

OK - it's kind of the wacky way to go about it, but whatever works.

I'd normally create my own Main method, do whatever command line stuff I need to there and if I need to start the Windows Form app, branch off to the Application.Run(new MyMainForm). Other than that, let the Main method die normally.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Mobile phone programs

Enobong Adahada14-Oct-09 4:45

14-Oct-09 4:45

i am completely new here, pls what is RedFive labs?

EliottA14-Oct-09 4:51

Invalidation, Painting problems

14-Oct-09 4:51

Enobong Adahada wrote:
i am completely new here

Congrats

Enobong Adahada wrote:
what is RedFive labs?

RedFive Labs[^]

Try Google more often.

[Edit]
Ok, I can tell you are new here.
Please check out the link at the top entitled 'how to get an answer to your question'.
People here will not do work for you based off your vague requirements, and even if you do state requirements properly chances are you still won't receive free work.

Please post specific problems that are part of your project, we won't start or finish it for you but we will help you along the way.

Please buy a book on the topic you wish to learn and begin studying/learning it. You cannot become a developer overnight.
[/Edit]

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

DahrkDaiz14-Oct-09 4:22

DahrkDaiz

14-Oct-09 4:22

Ok, I have a control with custom painting being done. I have a back buffer bitmap that I draw to then OnPaint, I paint the entire bitmap to the control. There are sometimes with certain sections of the bitmap are updated and all I need to do is update those sections on the control. So what I'm doing so far is:

pseudocode

void UpdateArea(Rectangle rect)
{
    // Drawing code;
    Invalidate(rect);
}

void OnPaint(object o, PaintEventArgs e)
{
    e.Graphics.DrawImage(BackBuffer, e.ClipRectangle, e.ClipRectangle, GraphicsUnit.Pixel);
}

Ok, that's not actual code, but it's close enough. When I call UpdateArea, the area which I changed is successfully reflected on the screen. However, once UpdateArea is called, the control will only redraw that section from there on out. Everything outside of the region becomes garbage. The Bitmap itself is fine because if I call Invalidate(), the entire bitmap draws just fine. What am I missing that would prevent the rest of the bitmap from being draw properly?

Re: Invalidation, Painting problems

Luc Pattyn14-Oct-09 4:42

Luc Pattyn

14-Oct-09 4:42

Hi,

I don't see anything wrong.
Are you sure you represented the actual code close enough?
or are you having some Graphics.Transforms you did not show?

tips for debugging:
- add logging (to file or to Console) to both UpdateArea and OnPaint; then check each rect that appears in UpdateArea
- create a second Panel ( or form or whatever) and inside the original OnPaint paint the entire bitmap to the entire second Panel, so you can see real-time whether your BackBuffer is still intact.

BTW: simplifying code shown may be a bad idea: something does not work the way you expect, what makes you think you can simplify your code reliably without hiding the problem?

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? Neen!

Re: Invalidation, Painting problems

DahrkDaiz14-Oct-09 4:50

DahrkDaiz

14-Oct-09 4:50

Actually I just found my problem! When I go to call LockBits, I initially lock the entire bitmap, which apparently does something to the data. if I lock just the portion of the bitmap that I'm updating, all is fine and well.

Create the database with LINQ

Mohammad Dayyan14-Oct-09 4:18

Mohammad Dayyan

14-Oct-09 4:18

Hi.
I'm using LINQ to SQL. I wanna create a database with LINQ but the following exception has occurred :
Illegal characters in path.

This is my code :

using (RezaRestaurant.SQL.DataClasses1DataContext dbc = new RezaRestaurant.SQL.DataClasses1DataContext())
    if (!dbc.DatabaseExists())
        dbc.CreateDatabase();//Exception

BTW : I was using UFT8 characters in database's tables, like this : اقلام_فروخته_شده

Could you please guide me ?
Thanks.

Dave Kreskowiak14-Oct-09 5:15

14-Oct-09 5:15

Illegal characters in path usually referrs to a file system path specification. Apparently, you're trying to check if a database exists in a certain place in the filesystem, but have built an illegal path specification.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Mohammad Dayyan14-Oct-09 15:38

Mohammad Dayyan

14-Oct-09 15:38

Thanks Dave Kreskowiak.
So , How can I resolve it ?

Dave Kreskowiak14-Oct-09 16:15

14-Oct-09 16:15

Uhhh...make sure the path you built is legal?? What does the code look like that built the path you're using?

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Mohammad Dayyan14-Oct-09 23:29

Mohammad Dayyan

14-Oct-09 23:29

Dave Kreskowiak wrote:
Uhhh...make sure the path you built is legal??

Well, I've tested it in root of D drive , but the exception has occurred again !
The database file (*.mdf) is beside of application's exe file in SQL folder.
With following code , I'm trying to create a new database.

/// <summary>
/// DataBase Folder
/// </summary>
public static string DBFolder = Application.StartupPath + "\\SQL\\";

private void MainForm_Load(object sender, EventArgs e)
{
    if (!Directory.Exists(StaticVariables.DBFolder))
        Directory.CreateDirectory(StaticVariables.DBFolder);
    using (RezaRestaurant.SQL.DataClasses1DataContext dbc = new RezaRestaurant.SQL.DataClasses1DataContext())
        if (!dbc.DatabaseExists())
            dbc.CreateDatabase();//Exception
}

Dave Kreskowiak15-Oct-09 1:09

application validation did not succeed

15-Oct-09 1:09

Youre code sure could use some work. I hate methods that don't take parameters when the name suggests they should.

The problem isn't in the first five lines you posted, up until the second if statement. So now you move on to the next lines. What does the code for dbc.DatabaseExists() and dbc.CreateDatabase() look like?

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

tamir90114-Oct-09 4:10

tamir901

14-Oct-09 4:10

Hi,

I publish a setup with click one Installation,
and when i'm trying to install it i get:
application validation did not succeed.

What i'm doing wrong????

Re: application validation did not succeed

Not Active14-Oct-09 4:18

Not Active

14-Oct-09 4:18

How are we supposed to answer? You have provided no details of what you have done or how you've done it. Roll eyes | :rolleyes:

only two letters away from being an asset

Re: application validation did not succeed

tamir90114-Oct-09 23:57

tamir901

14-Oct-09 23:57

Mark Nischalke wrote:
How are we supposed to answer? You have provided no details of what you have done or how you've done it.

I worket wxactly like this[]

Do you need more details?

landscape page in crystal report

Enobong Adahada14-Oct-09 4:05

Re: landscape page in crystal report

14-Oct-09 4:05

i want to use a landscape setup in my c# crystal report app.

EliottA14-Oct-09 4:54

Re: landscape page in crystal report

14-Oct-09 4:54

Ok, I can tell you are new here.
Please check out the link at the top entitled 'how to get an answer to your question'.
People here will not do work for you based off your vague requirements, and even if you do state requirements properly chances are you still won't receive free work.

Please post specific problems that are part of your project, we won't start or finish it for you but we will help you along the way.

Please buy a book on the topic you wish to learn and begin studying/learning it. You cannot become a developer overnight.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Lyon Sun14-Oct-09 9:37

Lyon Sun

14-Oct-09 9:37

And I just want to have a million dollars. Laugh | :laugh:

multiple reports in a single reportviwer

Enobong Adahada14-Oct-09 4:04

Re: multiple reports in a single reportviwer

14-Oct-09 4:04

i have multiple reports in my c# app. i want to view them all using a single report viewer (crystal reports)

EliottA14-Oct-09 4:54

14-Oct-09 4:54

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Mobile phone programs

Enobong Adahada14-Oct-09 3:59

14-Oct-09 3:59

Hi all,
Please can someone tell me how to start mobile apps.
i want to write a program to make calls using my pc, where do i start from.
i am new in this area.

Not Active14-Oct-09 4:15

Not Active

14-Oct-09 4:15

First you need to understand and clarify what you want.

Enobong Adahada wrote:
how to start mobile apps.

Enobong Adahada wrote:
make calls using my pc

These are two separate environments

only two letters away from being an asset

dan!sh 14-Oct-09 4:17

dan!sh

14-Oct-09 4:17

Which mobiles? Mobile phones have an OS and not all will support your .net code. If you are aiming at Windows based mobiles, look in to .Net compact framework. There is a plenty of documentation about that on MSDN. If you are aiming at Symbian based mobiles, you can make .net application again and deploy them using RedFiveLabs.

Try out some basic stuff to begin with through the tutorials available.

As far as making calls from PC is concerned, I don't see much relation of that with Mobile development.

It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD

EliottA14-Oct-09 4:56