Visual Basic

31-Jul-07 23:34

Hi,

In an attempt to simplify the debugging process, I wrote a public sub EC (ErrorCatcher), that I can call from anywhere in my app, which writes all necessary information to a text file. Something like:

Public Sub EC(Byval err As Exception)<br />
dim line as string = Now & " - Error: " & Err.TargetSite.Name & " - " & Err.Message<br />
'write line to file, etc.<br />
End Sub<br />
<br />
Private Sub MyCode()<br />
Try<br />
'some error happens here<br />
Catch ex As Exception<br />
EC(ex)<br />
End Try<br />
End Sub

This Err.TargetSite.Name is just my latest attempt, but it does not tell me that the error took place in Private Sub MyCode.

Is there any way (other than passing it to the EC sub as a handwritten string) at all to find out in what part of the code the exception occurred, at runtime, and if yes then how?

Any help or suggestions appreciated.

Johan

My advice is free, and you may get what you paid for.

Christian Graus31-Jul-07 23:54

Christian Graus

31-Jul-07 23:54

Yes, you can get the stack trace from the exception object and print it, it will tell you what method threw the exception, and a call stack down from there.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Johan Hakkesteegt1-Aug-07 20:02

1-Aug-07 20:02

Thanks Christian, Steve also suggested this, and according to Luc I can get even more information out of an exception by simply using Exception.ToString().

Thank all you guys, this really helps.

My advice is free, and you may get what you paid for.

Steven J Jowett31-Jul-07 23:58

Steven J Jowett

31-Jul-07 23:58

I believe you need to check the StackTrace property.

err.StackTrace

Steve Jowett
-------------------------
Sometimes a man who deserves to be looked down upon because he is a fool, is only despised only because he is an 'I.T. Consultant'

Johan Hakkesteegt1-Aug-07 20:00

1-Aug-07 20:00

Thanks Steve, I will try this.

My advice is free, and you may get what you paid for.

Luc Pattyn1-Aug-07 0:27

Luc Pattyn

1-Aug-07 0:27

Hi,

rather than using Exception.Message and/or Exception.StackTrace
you really should use Exception.ToString()

it will show you at least the Message and the StackTrace
but also:
- additional information (e.g. the filepath on a File Not Found)
- information about "inner exceptions"

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Johan Hakkesteegt1-Aug-07 19:59

Error when display report in crystal report viewer

1-Aug-07 19:59

Thanks Luc, I'll definitely give this a try.

My advice is free, and you may get what you paid for.

Mekong River31-Jul-07 22:56

Mekong River

31-Jul-07 22:56

Hi, I got a problem while trying to view a report in crystal application. When I try to open the report, it display this error message: Server has not yet been opened. My application is connect to sql server and when I try to add data or retrieve data from the database, it work fine. But when I try to view the report it display the above error message. Please let me know how to solve the problem.

C# code to vb.net

Ahmad Zaidi31-Jul-07 22:00

Ahmad Zaidi

31-Jul-07 22:00

Hi,

I was trying to take a screenshot of a web page through the web browser control using the drawtobitmap function and it was giving blank images for pages such as google.com . I finally found the reason as stated by someone here :
http://www.codeproject.com/useritems/Website_Thumbnails_in_C_.asp?df=100&forumid=359744&exp=0&select=2053785#xx2053785xx

I am now trying to convert the code given by the guy to vb.net, but am new to it and cant seem to implement the interface calls. Could anyone please help he port the code? Here it is (as given in the post):

"The only sure fire way round I found was to fall back to using the raw interfaces:

1) Add a reference to MSHTML.tlb

2) Create your own version of IHTMLElementRender which uses an IntPtr rather than _RemotableHandle:

[InterfaceType(1)]
[Guid("3050F669-98B5-11CF-BB82-00AA00BDCE0B")]
public interface IHTMLElementRender2
{
void DrawToDC(IntPtr hdc);
void SetDocumentPrinter(string bstrPrinterName, ref _RemotableHandle hdc);
}

2) Use this code to capture the initial web page image:

IHTMLDocument2 rawDoc = (IHTMLDocument2)hiddenWebBrowser.Document.DomDocument;
IHTMLElement rawBody = rawDoc.body;
IHTMLElementRender2 render = (IHTMLElementRender2)rawBody;

Bitmap screenCapture = new Bitmap(width, height);
Rectangle drawRectangle = new Rectangle(0, 0, width, height);
myWebBrowser.DrawToBitmap(screenCapture, drawRectangle);
Graphics graphics = Graphics.FromImage(screenCapture);

IntPtr graphicshdc = graphics.GetHdc();
render.DrawToDC(graphicshdc);
bmpg.ReleaseHdc();
bmpg.Dispose();"

Thanks!
Ahmad

Re: C# code to vb.net

Christian Graus31-Jul-07 22:02

Christian Graus

31-Jul-07 22:02

There are web sites that convert C# to VB, and some CP articles also. There are also commercial products, that probably do a better job.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: C# code to vb.net

eyes200731-Jul-07 22:10

move the toolbar in program

31-Jul-07 22:10

try this link

http://converter.telerik.com/

Re: C# code to vb.net

Ahmad Zaidi31-Jul-07 22:18

Ahmad Zaidi

31-Jul-07 22:18

Hi,

Thanks alot for the link and help guys! Its converting the code fine, but VB doesnt seem to recognise InterfaceType(1) in the follwing code snippet (I am pasting it as member of a form class):

<interfacetype(1)> _
<guid("3050f669-98b5-11cf-bb82-00aa00bdce0b")> _
Public Interface IHTMLElementRender2
Sub DrawToDC(ByVal hdc As IntPtr)
Sub SetDocumentPrinter(ByVal bstrPrinterName As String, ByRef hdc As _RemotableHandle)
End Interface

I have added the reference too. It says "Type 'InterfaceType' is not defined". Am i missing out on something?

Thanks!
Ahmad

eyes200731-Jul-07 20:58

31-Jul-07 20:58

hi all

i still not able to move the toolstrip on the form

i put it in the toolstripcontainer

but the problem not solve

Tom Deketelaere31-Jul-07 21:20

Tom Deketelaere

31-Jul-07 21:20

since I can't mail you the example project here is how to made it (brief but should be enough)

on a empty form:

add toolstrip
add toolstripcontainer (upper right corner of toolstrip)
toolstripcontainer dock property = fill
add second toolstrip (next to the first one)
add statusbar (will not be docked properly but we'll solve that later)
add you're ruler
add you're rich text box
add everything else you want on the form (in the toolstripcontainer)

now that that is done let's place verything
to do this in an easy way open the 'document outline' window (located under 'view -- other windows -- document outline) this is a very handy window for docking

when you click the '-' next to the toolstripcontainer1 you should have the following order of controls (if this isn't the case you can just replace them by drag and drop in the document oultine window:
toolstripcontainer1
statustrip

now lets look at the toolstripcontainer1 (click the '+' next to it)
now you have 5 main groups (don't change these the are added by designer for the toolstripcontainer)

first group ToolStripContainer1.ContentPanel:
ruler1 (must be the first if you want you're ruler to be docked)
richtextbox1
...

the second (left),third (right), and fifth (bottom) group don't contain anything

the fourth group (top):
toolstrip1
toolstrip2
(order doesn't mather)

now it should work (you can drag the toolstrip1 and 2 to the left, right and bottom edge of the form at run time)

hope this helps

eyes200731-Jul-07 22:26

31-Jul-07 22:26

when i set the
toolstripcontainer dock property = fill

then the toolstripcontainer occupy the whole form and other elements are hide behind the toolstripcontainer

what's going worng

Tom Deketelaere1-Aug-07 0:12

Tom Deketelaere

1-Aug-07 0:12

that's beceause you're other controls are on the form and not on the toolstripcontainer

use the document outline window to drag the controls into the first group of the toolstripcontainer (those 5 groups described in previous post)

the toolstripcontainer acts as container of panels (5 of them top,left,bottem,right,content)
you need to add your controls to its content panel

eyes20071-Aug-07 1:00