C# Discussion Boards - CodeProject

C# programme crashes without an obvious reason

Ash Zidan28-Feb-12 6:16

28-Feb-12 6:16

I'm writing a C# program that reads RSS feeds and displays them on a windows form... The program first worked fine, no problem, but suddenly it began to crash once I had navigated in the web browser control in the C# program. I got into some sort of knowing what causes the problem... When provide the web browser using WebBrowser.DocumentText = sting with large amount of data it does crash... so does anybody have a solution for that??

sb.Append("");
sb.Append(row.title);
sb.Append("

");
sb.Append(ASCIIEncoding.ASCII.GetString((byte[])row.desc));
desc_self_nav = false;
webBrsrRSSDesc.DocumentText = sb.ToString()

Re: C# programme crashes without an obvious reason

Eddy Vluggen28-Feb-12 9:13

Eddy Vluggen

28-Feb-12 9:13

Is it the webbrowser that crashes, or the stringbuilder? Can you paste the text of the exception that it throws?

Bastard Programmer from Hell Suspicious | :suss:

Re: C# programme crashes without an obvious reason

Shameel28-Feb-12 18:32

Shameel

28-Feb-12 18:32

Eddy Vluggen wrote:
Is it the webbrowser that crashes, or the stringbuilder?

That's what the OP wants to know.

Eddy Vluggen wrote:
Can you paste the text of the exception that it throws?

Obviously, if there was an exception, it would not be called a crash.

Re: C# programme crashes without an obvious reason

Eddy Vluggen28-Feb-12 20:27

Eddy Vluggen

28-Feb-12 20:27

Shameel wrote:
That's what the OP wants to know

Not so hard to find out, is it? Just put the contents of the StringBuilder in a (temp) string, and assign it to the browser on the second line.

Shameel wrote:

Obviously, if there was an exception, it would not be called a crash.

Thanks for the useful hint Smile | :)

Bastard Programmer from Hell Suspicious | :suss:

Re: C# programme crashes without an obvious reason

Pete O'Hanlon28-Feb-12 21:29

Pete O'Hanlon

28-Feb-12 21:29

Shameel wrote:
Obviously, if there was an exception, it would not be called a crash.

Not true. If he hasn't handled the exception it would still crash, but there would still be an exception.

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: C# programme crashes without an obvious reason

Shameel28-Feb-12 23:10

Shameel

28-Feb-12 23:10

Pete O'Hanlon wrote:
but there would still be an exception.

Correct, but in case of a crash, the OP would not be able to post the exception here, and that is what I was pointing out to.

Re: C# programme crashes without an obvious reason

Pete O'Hanlon28-Feb-12 23:22

Pete O'Hanlon

28-Feb-12 23:22

I'm pretty sure that an unhandled exception would be written to the event log if it crashed an application. It's been so long since I've written an application where I didn't have a top level exception handler, but I'm fairly certain this is the case.

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: C# programme crashes without an obvious reason

Eddy Vluggen29-Feb-12 0:30

Eddy Vluggen

29-Feb-12 0:30

Non curo; if he's working with computers, then he should be able to tell a bit more than "it crashed". Your basic helpdesk-employee will tell you that there are different kind of crashes - should I simply assume that it generated a BSOD?

Most people here are referring to "exceptions" when they're talking about code and "crash".

Bastard Programmer from Hell Suspicious | :suss:

Re: C# programme crashes without an obvious reason

jschell28-Feb-12 13:52

jschell

28-Feb-12 13:52

Ash Zidan wrote:
but suddenly it began to crash once

And that means what exactly?

What exactly is the evidence that you see?

Re: C# programme crashes without an obvious reason

Shameel28-Feb-12 23:15

Shameel

28-Feb-12 23:15

Try storing the content of the StringBuilder to a temporary html file and use WebBrowser.Navigate method to load the file. This will help you in isolating the real culprit - the StringBuilder or the WebBrowser.

PropertyDescriptor.GetValue and PropertyInfo.GetValue

kashme28-Feb-12 3:23

kashme

28-Feb-12 3:23

PropertyDescriptor.GetValue(object component);
what is this component. I do not get. Can someone please get an example.
Also why PropertyInfo.GetValue(object, objects[]) needs to have parameters. Why we cannot have values through reflection directly. Can someone give me example of propertydescriptor.GetValue(object component), how to use it. I do not find much on msdn.

Re: PropertyDescriptor.GetValue and PropertyInfo.GetValue

Eddy Vluggen28-Feb-12 9:01

Eddy Vluggen

28-Feb-12 9:01

kashme wrote:
what is this component

It's an abstract description of a property[^].

kashme wrote:
Can someone please get an example

At the bottom of that page are the usual examples.

Used it for example, when implementing a GetProperties[^] method. A neat way to provide properties that a PropertyEditor can understand while passing an array wrapped in a ICustomTypeDescriptor[^].

Bastard Programmer from Hell Suspicious | :suss:

MOQ unit test

michaelgr128-Feb-12 2:50

michaelgr1

28-Feb-12 2:50

Hello,

I am writing unit test to a method named methodName for example. The tested class extends another base class.

The tested method uses a method that is implemented in the base class, But i want to use Mock in order to Mock this method.

How can i do it?

Re: MOQ unit test

Eddy Vluggen28-Feb-12 9:10

Eddy Vluggen

28-Feb-12 9:10

Something like this;

    class MyBaseClass
    {
        public virtual string methodName()
        {
            return "This is base calling";
        }
    }
    class MyTestedClass: MyBaseClass
    {
        public override string methodName()
        {
            return "This is the testing value calling";
        }

    }
    class MyTestedClassMock: MyBaseClass
    {
        public override string methodName()
        {
            return "Whaahaha, I'm not the real one, just a mock-stand in.";
        }
    }

//..in the test-bit
MyBaseClass someObject = new MyTestedClassMock();
                        // or new MyTestedClass();
MessageBox.Show(someObject.methodName());

Bastard Programmer from Hell Suspicious | :suss:

Accessing System Databases

AmbiguousName28-Feb-12 1:48

AmbiguousName

28-Feb-12 1:48

hello guys... How can I access system databases in which <b>The Machine</b> stores some of the info we can use it. For example <b>Win32_OperatingSystem</b>. Now I can access 'LastBootUpTime' from this database.
The question is:
how can find and view this database (and other related databases) in sql server? thnx for any input

Re: Accessing System Databases

Bernhard Hiller28-Feb-12 3:25

Bernhard Hiller

28-Feb-12 3:25

That's Windows Management Instrumentation (WMI). See e.g. http://msdn.microsoft.com/en-us/library/windows/desktop/aa393964(v=vs.85).aspx[^]

Synchronize RichTextBox scrolling

lune1228-Feb-12 0:57

lune12

28-Feb-12 0:57

Hi,

I have two multiline RichTextBoxes, no wrap (horizontal/vertical scrollbars)

Is there a way I can sync the scrolling so when I scroll one, the other one scrolls?

Thanks

Re: Synchronize RichTextBox scrolling

Shameel28-Feb-12 4:04

Shameel

28-Feb-12 4:04

A simple search in google gave this[^] link.

Re: Synchronize RichTextBox scrolling

lune1228-Feb-12 6:01

lune12

28-Feb-12 6:01

Yes thank you, found it also.
was seeking for an another way.
but this way is working good also

Re: Synchronize RichTextBox scrolling

Shameel28-Feb-12 18:33

Shameel

28-Feb-12 18:33

If you found it useful, why not mark it as answer?

Please help compiling Dr Dobbs Challenge from 2008

cgb14327-Feb-12 8:38

cgb143

27-Feb-12 8:38

I have recently obtained the files for the old Dr Dobbs Challenge and wanted to use them to help my 13 year old grandson learn programming. All other sources of help seem to have dried up. The project file indicates Visual Studio # 2008.

I downloaded/installed VC# 2008 and Silverlight but VStudio won't load the project and reports incompatibility errors. I should say I also have VS2005 and VS2010 (C# and C++) as well as AVR Studio 5 (uses VS2010) on the computer, could there be a conflict?

Please help! what do I need to change.

Re: Please help compiling Dr Dobbs Challenge from 2008

vbmike27-Feb-12 9:01

vbmike

27-Feb-12 9:01

I think you may have to be a little specific about the errors you are getting. VS2010 should open it and offer to convert the code for you but you may have to manually correct some things. If possible I would search for other similar examples to download that are a little more recent. Maybe google can assist you.??

vbmike

Re: Please help compiling Dr Dobbs Challenge from 2008

cgb14328-Feb-12 2:54

cgb143

28-Feb-12 2:54

I can't believe I need 2010, it wasn't released at the time of this project.
The actual error message is two lines, " The project file "C:\~~~~~ .csproj' cannot be opened" followed by "The project type is not supported by this installation"
NOTE: I replaced the path with ~~~~~ .
This is a standard installation of VS2008 Express and Silverlight as specified.

Re: Please help compiling Dr Dobbs Challenge from 2008

RobCroll27-Feb-12 12:37

RobCroll

27-Feb-12 12:37

You might also want to take a look at Small Basic. The tutorial is great for young beginners.

"You get that on the big jobs."

Re: Please help compiling Dr Dobbs Challenge from 2008

cgb14328-Feb-12 3:01

cgb143

28-Feb-12 3:01

I have already exposed him to 6+ months of Small Basic and he has done well. I figured it was time to move on. Small Basic is good but in a limited way and it certainly isn't like any BASIC I grew up using. I guess that's why it's called "Small Basic". If we continue with BASIC it will probably be Dark Basic.

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