How to load entity properties conditionally - C# Discussion Boards

Re: How to translate Win32 error codes

Jörgen Sigvardsson30-Sep-09 2:08

Jörgen Sigvardsson

30-Sep-09 2:08

I already have the error code. I want to translate it into an error message, as stated.

--
Kein Mitleid Für Die Mehrheit

Re: How to translate Win32 error codes

Martijn van Kleef8-Dec-10 22:53

Martijn van Kleef

8-Dec-10 22:53

new Win32Exception(win32ErrorCode).Message

Re: How to translate Win32 error codes

Luc Pattyn30-Sep-09 2:11

Luc Pattyn

30-Sep-09 2:11

Hi,

you can use a little P/Invoke to access FormatMessage, this is the code I normally use:

using System.Runtime.InteropServices;		// DllImport

public static string GetSystemMessage(int errorCode) {
	int capacity = 512;
	int FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000;
	StringBuilder sb = new StringBuilder(capacity);
	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, IntPtr.Zero, errorCode, 0,
		sb, sb.Capacity, IntPtr.Zero);
	int i = sb.Length;
	if (i>0 && sb[i - 1] == 10) i--;
	if (i>0 && sb[i - 1] == 13) i--;
	sb.Length = i;
	return sb.ToString();
}

[DllImport("kernel32.dll")]
public static extern int FormatMessage(int dwFlags, IntPtr lpSource, int dwMessageId,
	int dwLanguageId, StringBuilder lpBuffer, int nSize, IntPtr Arguments);

Luc Pattyn

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

Re: How to translate Win32 error codes

Jörgen Sigvardsson30-Sep-09 2:13

Jörgen Sigvardsson

30-Sep-09 2:13

Thanks.

I had that one nailed down, but I felt an urge not to use it. Every time I see P/Invoke-stuff, I feel a cold chill running down my spine. Unsure | :~

--
Kein Mitleid Für Die Mehrheit

Re: How to translate Win32 error codes

Luc Pattyn30-Sep-09 2:20

Luc Pattyn

30-Sep-09 2:20

I don't know any alternative, some holes in .NET need to be filled with P/Invoking old stuff. I just keep those in a separate class of mine.

Smile | :)

Luc Pattyn

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

Problem In Window Services in C#

Anudeep Jaiswal - MCA30-Sep-09 1:34

Anudeep Jaiswal - MCA

30-Sep-09 1:34

I AM NEW IN WINDOWS SERVICES. I AM CREATING A WINDOW SERVICE THAT USES A EXTERNAL CALL….. THAT CLASS WORK FINE IN WINDOW APPLICATION BUT WHEN I CALL THAT CLASS IN WINDOW SERVICE …….. SERVICE NOT WORKING…
MY SERVICE CAPTURES AN EVENT …. TO ATTACH THAT EVENT I AM USING DELEGATE

CAN ANY ONE HELP

Re: Problem In Window Services in C#

SeMartens30-Sep-09 1:44

SeMartens

30-Sep-09 1:44

Hi,

do you use an external assembly for your windows service. If yes, you need to register that assembly in the GAC so that the service can access it.

Regards
Sebastian

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

How to load entity properties conditionally

Vikas Misra(TCS)30-Sep-09 1:24

Vikas Misra(TCS)

30-Sep-09 1:24

Hi,
Suppose i have an entity class which belongs to version table in the database having following properties for the fileds(columns)
#region Properties
private string _Program;

public string Program
{
get { return _Program; }
set { _Program = value; }
}

private string _AllowVersion;

public string AllowVersion
{
get { return _AllowVersion; }
set { _AllowVersion = value; }
}
#endregion

Suppose in a method i need to pass only one property so i will have to intitalize Entity class of version
which will have two properties but i need only one.
Do we have any way to tell version entity class that only load AllowVersion property only while initializing version entity and discard rest of the properties i.e my VersionEntity object must have only
one field.

I guess the only possible ways could be attributes or reflection. If possible please provide code snippet
to achieve this.
Is it possible to do this without performance cost??

Thanks In Advance

How Can I Create Printer

Anubhava Dimri30-Sep-09 1:00

Anubhava Dimri

30-Sep-09 1:00

Hello Experts,

I am Creating Printer For PDF Writing Like: Windows XPS Document Writer,Journal Note Writer.
If you have any type of suggestion. Your most thanks.

Thanks

If you can think then I Can.

Re: How Can I Create Printer

Wes Aday30-Sep-09 1:13

Wes Aday

30-Sep-09 1:13

Your answer is here[^]

Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Individuality is fine, as long as we do it together - F. Burns

Help humanity, join the CodeProject grid computing team here

Re: How Can I Create Printer

Richard MacCutchan30-Sep-09 1:14

Richard MacCutchan

30-Sep-09 1:14

eg_Anubhava wrote:
I am Creating Printer For PDF Writing

You probably need to start here[^] for details on the PDF data formats.

However, you can also check Google for one of the existing products.

file can be write on XP but can not on VISTA

khosnur30-Sep-09 0:46

khosnur

30-Sep-09 0:46

i can write a file in the any drive of XP operating System but i can not on vista. plz see my code and suggest me how i can write on VISTA operating System.

Server = txtServerHost.Text.Trim();
User = txtUserName.Text.Trim();
Password = txtPassword.Text.Trim();
DBName = "db_outlook";

DataTable dt = new DataTable("Server Configuration");
dt.Columns.Add("Server");
dt.Columns.Add("User");
dt.Columns.Add("Password");
dt.Columns.Add("DBName");
dt.Rows.Add(Server, User, Password, DBName);

dt.WriteXml(Application.StartupPath + "\\ServerInformation.bin");

Thanks in advance

Re: file can be write on XP but can not on VISTA

Calla30-Sep-09 1:01

Calla

30-Sep-09 1:01

If you launch your program from the Program Files folder I don't think you're allowed to write to that directory in Vista.

Re: file can be write on XP but can not on VISTA

khosnur30-Sep-09 1:07

khosnur

30-Sep-09 1:07

thanks for ur reply. yes when i install the software it creates into program file. it creates in xp but not in VISTA.

have any permission system?

plz help me...

thanks

Re: file can be write on XP but can not on VISTA

Calla30-Sep-09 1:21

Calla

30-Sep-09 1:21

I think Microsofts policy in Vista and 2008 Server is that you shouldn't write to the Program Files folder (except at install time). Simply choose another folder to store that file (for instance another predefined folder found in Environment.SpecialFolder). But as someone else wrote, do you really want to store a password in plain text like that?

Re: file can be write on XP but can not on VISTA

khosnur30-Sep-09 1:43

khosnur

30-Sep-09 1:43

thaks for ur reply.i will not put password info in plain text. but if i do that in installation time file can not create.

it is not possible? what i changed in my code. i will try it in diffent directory.

Thanks

Re: file can be write on XP but can not on VISTA

DaveyM6930-Sep-09 1:28

DaveyM69

30-Sep-09 1:28

Don't store stuff in program files!

There are two folders recommended for application storage depending on whether the data being stored is user specific.

// Environment.SpecialFolder.ApplicationData: 
// The directory that serves as a common repository for application-specific data for the current roaming user.
Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
// Environment.SpecialFolder.CommonApplicationData:
// The directory that serves as a common repository for application-specific data that is used by all users.
Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);

Dave

Generic BackgroundWorker - My latest article!
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: file can be write on XP but can not on VISTA

khosnur30-Sep-09 1:45

khosnur

30-Sep-09 1:45

thank u very much for ur reply

Re: file can be write on XP but can not on VISTA

Keith Barrow30-Sep-09 1:09

Keith Barrow

30-Sep-09 1:09

What error message are you getting.

By the way it is a REALLY bad idea to store passwords and usenames in plain text Smile | :)

CCC solved so far: 2 (including a Hard One!)

Re: file can be write on XP but can not on VISTA

khosnur30-Sep-09 1:13

khosnur

30-Sep-09 1:13

thanks for ur reply. no error message shown. only i found no file is created in program file.

if i wanna write how? i created it in startup path if i install in different drive. will it install and create the file?

Thanks

Re: file can be write on XP but can not on VISTA

Richard MacCutchan30-Sep-09 3:05

Richard MacCutchan

30-Sep-09 3:05

khosnur wrote:
i can write a file in the any drive of XP operating System but i can not on vista.

I just tried this on Windows 7 and it worked fine. Have you run it through the debugger to check the value of Application.StartupPath?

CD Burning in VISTA

Edward Topalian30-Sep-09 0:39

Edward Topalian

30-Sep-09 0:39

Hello there,
i'm trying to create a program that copies some files to the CD BLANK area.
i created the program working For Windows XP, but in Vista it is not working/
can anyone help me in that
thanks in advance

Re: CD Burning in VISTA

Christian Graus30-Sep-09 0:43

Christian Graus

30-Sep-09 0:43

There was a component called XPBurn, which worked in XP. If it's not supported in Vista, then you need to search the web for samples in Vista, assuming it's even possible in Vista.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Re: CD Burning in VISTA [modified]

User 21559730-Sep-09 0:57

User 215597

30-Sep-09 0:57

Using Image mastering API[^] might be help. If I am not wrong there was an article on CP about using IMAPIv2

Sohail

modified on Wednesday, September 30, 2009 8:50 AM

modified 21-Apr-21 21:01pm.

Crystal report color

antala30-Sep-09 0:27

antala

30-Sep-09 0:27

Hi.
I saved color in Mssql datatable from C# colordialog (colordialog.color.toArgb() & 0xFFFFFF )and i put the result in crystal report color formula but the result is not the color what i choose in colordialog window.
Why ? What's wrong ?
Excuse me for my English
THX.

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