C# Discussion Boards - CodeProject

Re: c# windows control fails to load in the webpage

RichardGrimmer11-Dec-07 22:23

11-Dec-07 22:23

I've been working on something very similar recently, and having almost identiacal problems!

I'm a lil confused by your post however - what do you mean by Virtual Website? Do you mean that the folder you're hosting the control in is a virtual directory, configured in IIS?

If this is the case, you shouldn't be having any problems - but of course we always do! Some things to check would be to ensure that the control is actually being served by IIS - I had issues with the control not being downloaded. Simplest way to check is to clear out temp internet files, navigate to the page, then check that the .dll has appeared in the folder (View files from IE Tools-> Internet Options) If it hasn't appeared, then the problem is with IIS, if it has, then probably a security issue.

If it isn't being served, check that the application's Execute Permissions (IIS Admin -> Site Properties) are set to Scripts only - i had mine set to Scripts and Executables, so when requested, IIS was treating my dll as an exe, and attempting to run it rather than serve to the client.

If it's a security issue, it may be that the evidence you're using isn't quite right. Most of the docs recommend using strong name evidence. The problem with this is that is causes stack walk problems with the app domain. I used site evidence, at the all code level, by issuing:

caspol -m -ag 1 -site www.mysite.com FullTrust -n MyGroupName

This creates a sub group of the All code group at the Machine level, granting full trust to anything from www.mysite.com.

Hopefully this helps Smile | :)

C# has already designed away most of the tedium of C++.

increment by 1 problem [modified]

eyeseetee9-Dec-07 22:09

eyeseetee

9-Dec-07 22:09

Hi
I have the following code which is supposed to increment 1 but it seems to be incrementing by 3

any suggestions?

cheers

string maxquery = "Select max(activity_order) from roomactivitylk where room_code = 'v1106'";

int max;

SqlCommand cmd15 = new SqlCommand();
cmd15.Connection = con;
cmd15.CommandText = maxquery;
max = Convert.ToInt32 (cmd15.ExecuteScalar());

max = max + 1;
++max;
max++;(needs to only be one of these)

modified on Monday, December 10, 2007 4:41:39 AM

Re: increment by 1 problem

Christian Graus9-Dec-07 22:23

Christian Graus

9-Dec-07 22:23

Jamie1985 wrote:
max = max + 1;
++max;
max++;

Each of these lines increments max by one.

Christian Graus - Microsoft MVP - C++

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: increment by 1 problem

Michael Sync9-Dec-07 22:24

Michael Sync

9-Dec-07 22:24

Jamie1985 wrote:
max = max + 1;
++max;
max++;

Why do you write like that?

use only one. eg. max++;

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Re: increment by 1 problem

eyeseetee9-Dec-07 22:31

eyeseetee

9-Dec-07 22:31

thanks managed to sort it, you were right
cheers

Re: increment by 1 problem

Christian Graus9-Dec-07 23:49

Christian Graus

9-Dec-07 23:49

If that was really your problem, you can't have possibly written the DB code you posted ? You should buy a C# programming book and work through it.

Re: increment by 1 problem

N a v a n e e t h9-Dec-07 22:35

N a v a n e e t h

9-Dec-07 22:35

Jamie1985 wrote:
I have the following code which is supposed to increment 1 but it seems to be incrementing by 3

Why you given it 3 times ?

Jamie1985 wrote:
max = max + 1;

Increments 1 to max value

Jamie1985 wrote:
++max;

Pre-increment. max value won't be changed

Jamie1985 wrote:
max++;

Post-increment. Same like the first one.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

My Website | Ask smart questions

Re: increment by 1 problem

Anthony Mushrow10-Dec-07 0:15

Anthony Mushrow

10-Dec-07 0:15

N a v a n e e t h wrote:
Pre-increment. max value won't be changed

I thought it would, it just works in a different order, like:

int a;<br />
int b = 4;<br />
int c = 3;<br />
<br />
a = b++*c;<br />
//a would be 12, b would be 5<br />
//the line is executed, then b is incremented<br />
<br />
b=4;<br />
c=3;<br />
<br />
a = ++b*c;<br />
//a would be 15, be would be 5<br />
//b is encremented, then the line is executed

I'll have to go check now.

My current favourite word is: Bauble!

-SK Genius

Re: increment by 1 problem

N a v a n e e t h10-Dec-07 0:23

N a v a n e e t h

10-Dec-07 0:23

SK Genius wrote:
I thought it would, it just works in a different order, like:

OOPS, I am wrong. Whatever you said is correct.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Draw images into device screen using filtergraph

sheeja_a_l9-Dec-07 22:07

sheeja_a_l

9-Dec-07 22:07

Hi
I need to draw images into the device screen using filter graph is it possible?

Regards

Sheeja. A.L

windows form

avvaru.murali9-Dec-07 22:06

avvaru.murali

9-Dec-07 22:06

Hi,
iam doing windows application in c#

my windows form consists of textboxes,lables,buttons and datagridview control..

now i want to print the form...is there any code for both form controls and datagridview control printing ....

thanks in advance..
with regards
murali

murali krishna

Re: windows form

Michael Sync9-Dec-07 22:22

Michael Sync

9-Dec-07 22:22

1. Use BitBlt API or PrintWindows API to capture the screenshot of your window form.
2. Save it as image in your memory stream or disk.
3. Print this image.

Example : Printing a Windows Form[^]

Hope it helps.

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Re: windows form

Ajay.k_Singh9-Dec-07 23:39

Ajay.k_Singh

9-Dec-07 23:39

Image of complete form or image of any control can be drawn on a bitmap object using Control.DrawToBitmap() function, here it would be something like, this.DrawToBitmap().

Once you get snapshot on a bitmap object, use PrintDocument control and draw this image using e.Graphics.DrawImage in PrintPage event of PrintDocument.

I hope this helps.

-Dave.

Dave Traister,
ComponentOne LLC.
www.componentone.com

application start error

arkiboys9-Dec-07 21:26

arkiboys

9-Dec-07 21:26

I have installed an application using clickonce.
The user is running the application on wini xp pro machine.
Not sure why the user sometimes gets the following message when trying to open the application.

In case it makes any difference, the application is written in .net 2.0

Any thoughts please?

Here is the error message:

Cannot Start Application

Cannot continue. The application is improperly formatted.

Contact the application vendor for assistance.

OK Details…

PLATFORM VERSION INFO

Windows : 5.1.2600.131072 (Win32NT)

Common Language Runtime : 2.0.50727.42

System.Deployment.dll : 2.0.50727.42 (RTM.050727-4200)

mscorwks.dll : 2.0.50727.42 (RTM.050727-4200)

dfdll.dll : 2.0.50727.42 (RTM.050727-4200)

dfshim.dll : 2.0.50727.42 (RTM.050727-4200)

SOURCES

Deployment url : file:///C:/Documents%20and%20Settings/engelber/Start%20Menu/Programs/xyz%20Europe/PricingAnalytics.appref-ms

ERROR SUMMARY

Below is a summary of the errors, details of these errors are listed later in the log.

* Activation of C:\Documents and Settings\engelber\Start Menu\Programs\xyz Europe\PricingAnalytics.appref-ms resulted in exception. Following failure messages were detected:

+ Exception reading manifest from http://ldn03a01/PricingAnalytics/PricingAnalytics.application: the manifest may not be valid or the file could not be opened.

+ The 'link' start tag on line 20 does not match the end tag of 'head'. Line 222, position 3.

COMPONENT STORE TRANSACTION FAILURE SUMMARY

No transaction error was detected.

WARNINGS

There were no warnings during this operation.

OPERATION PROGRESS STATUS

* [10/12/2007 07:05:54] : Activation of C:\Documents and Settings\engelber\Start Menu\Programs\xyz Europe\PricingAnalytics.appref-ms has started.

* [10/12/2007 07:05:54] : Performing necessary update check as specified by the deployment.

ERROR DETAILS

Following errors were detected during this operation.

* [10/12/2007 07:05:54] System.Deployment.Application.InvalidDeploymentException (ManifestParse)

- Exception reading manifest from http://ldn03a01/PricingAnalytics/PricingAnalytics.application: the manifest may not be valid or the file could not be opened.

- Source: System.Deployment

- Stack trace:

at System.Deployment.Application.ManifestReader.FromDocument(String localPath, ManifestType manifestType, Uri sourceUri)

at System.Deployment.Application.DownloadManager.DownloadDeploymentManifestDirect(SubscriptionStore subStore, Uri& sourceUri, TempFile& tempFile, IDownloadNotification notification, DownloadOptions options, ServerInformation& serverInformation)

at System.Deployment.Application.DownloadManager.DownloadDeploymentManifest(SubscriptionStore subStore, Uri& sourceUri, TempFile& tempFile, IDownloadNotification notification, DownloadOptions options)

at System.Deployment.Application.ApplicationActivator.PerformDeploymentUpdate(SubscriptionState subState)

at System.Deployment.Application.ApplicationActivator.ProcessOrFollowShortcut(String shortcutFile, TempFile& deployFile)

at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut)

at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)

--- Inner Exception ---

System.Xml.XmlException

- The 'link' start tag on line 20 does not match the end tag of 'head'. Line 222, position 3.

- Source: System.Xml

- Stack trace:

at System.Xml.XmlTextReaderImpl.Throw(Exception e)

at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)

at System.Xml.XmlTextReaderImpl.ThrowTagMismatch(NodeData startTag)

at System.Xml.XmlTextReaderImpl.ParseEndElement()

at System.Xml.XmlTextReaderImpl.ParseElementContent()

at System.Xml.XmlTextReaderImpl.Read()

at System.Xml.XmlTextReader.Read()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlTextReaderImpl.Skip()

at System.Xml.XmlTextReader.Skip()

at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()

at System.Xml.XmlCharCheckingReader.Read()

at System.Xml.XsdValidatingReader.Read()

at System.Deployment.Application.ManifestReader.FromDocument(String localPath, ManifestType manifestType, Uri sourceUri)

COMPONENT STORE TRANSACTION DETAILS

No transaction information is available.

Re: application start error

Michael Sync9-Dec-07 22:17

Michael Sync

9-Dec-07 22:17

either *.application (e.g. Shell.application) or *.exe.manifest (e.g. Shell.exe.manifest) is invalid. So, try to fix those files by using megaui tool or republish your application.

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Create Aspx page on the fly

sarangpani9-Dec-07 18:46

sarangpani

9-Dec-07 18:46

Hi,
How do I create the aspx page on the fly? is there any better solution.

Re: Create Aspx page on the fly

Christian Graus9-Dec-07 18:52

Christian Graus

9-Dec-07 18:52

1 - ask in the ASP.NET forum
2 - why do you want to, and what do you mean by 'on the fly' ? ASP.NET allows you to use things like literal controls to generate any HTML you like. You can also create controls themselves on the fly, but if you do, you'll have to work hard to get events from them.

Re: Create Aspx page on the fly

N a v a n e e t h9-Dec-07 19:21

N a v a n e e t h

9-Dec-07 19:21

Use file manipulation function to create a file and write contents into that following ASP.NET syntax. This newly created page won't have a code-behind file. You need to write server side scripts in ASPX page itself. But this method is tough for doing changes to the page.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Beginner programming question?

cmh6239-Dec-07 17:50

cmh623

9-Dec-07 17:50

What am I doing wrong in this snippet of code? I can't seem to figure out how to make this work:
using System;

public class DebugFive2

{

public static void Main()

{

const string pass1 = home;

const string pass2 = house;

const string pass3 = mouse;

string password;

Console.Write("Please enter your password ");

password = Console.ReadLine();

while(password != pass1 || password != pass2 || password != pass3)

Console.WriteLine("Invalid password. Please enter again. ");

password = Console.ReadLine();

Console.WriteLine("Valid password");

}

}

Any help would be greatly appreciated

Re: Beginner programming question?

CKnig9-Dec-07 18:32

CKnig

9-Dec-07 18:32

First: you should get an compiler error with the consts - use const string pass1 = "home"; for example

Second: in your while-loop you are just using the Writeline (no block) - use this:

<br />
{<br />
  Consoloe.WriteLine(....<br />
  password = ....<br />
}<br />

Then your problem is with the ORs (||):
You iterate the while-loop as long the password is not pass1 OR not pass2 OR not pass3 and as pass1 != pass2 != pass3 you will satisfy this contition no matter what the input is - so just use && instead of || (substituting OR with AND) and it will work.

Re: Beginner programming question?

cmh6239-Dec-07 18:40

cmh623

9-Dec-07 18:40

Thanks CKnig, that definitely cleared things up for me. I appreciate your help!

Why am I getting this error "Attempted to read or write protected memory....."? [modified]

Khoramdin9-Dec-07 17:01

Khoramdin

9-Dec-07 17:01

Hello everyone,

I have a WebBrowser Control in Windows Application. As the user Navigate using the Web Browser Control if the site tries to open a new Window using script I get the following error.

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

I also tried the code given here http://www.codeproject.com/KB/cpp/ExtendedWebBrowser.aspx[^] and same error was given.

I am using Visual Studio C# 2008.

Can anyone tell me what is going on and how I can sort this out?

Thank you very much for your help and have a great day.

Khoramdin

modified on Sunday, December 09, 2007 11:07:25 PM

Re: Why am I getting this error "Attempted to read or write protected memory....."?

Sathesh Sakthivel9-Dec-07 17:08

Sathesh Sakthivel

9-Dec-07 17:08

What does the debugger say. If an error is reproducable in this way you can be lucky.
The reasons are many: Overwritten memory, buffer overrun, unlocked pointer, pointer to a pined managed object were the pn is freed, but the pointer is still in use...

Repro the error in the debugger and watch the call stack.

SSK.

Anyone who says sunshine brings happiness has never danced in the rain.

Re: Why am I getting this error "Attempted to read or write protected memory....."?

N a v a n e e t h9-Dec-07 20:18

N a v a n e e t h

9-Dec-07 20:18

Vri SSK wrote:
What does the debugger say. If an error is reproducable in this way you can be lucky.
The reasons are many: Overwritten memory, buffer overrun, unlocked pointer, pointer to a pined managed object were the pn is freed, but the pointer is still in use...

Repro the error in the debugger and watch the call stack.

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=148108&SiteID=1[^]

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

My Website | Ask smart questions

[Message Deleted]

cmh6239-Dec-07 16:58

cmh623

9-Dec-07 16:58

[Message Deleted]

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.