ListView TopItem change event or Scroll event - C# Discussion Boards

ListView TopItem change event or Scroll event

10-Jun-08 5:00

If you download Expresso ( www.expresso.com ) it will help you learn how to use regex. It probably has a sample regex in it for URLs, too.

Christian Graus

Please read this if you don't understand the answer I've given you

"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 )

Linq to SQL failing

Stephen Lintott10-Jun-08 4:50

Stephen Lintott

10-Jun-08 4:50

Hi maby someone can help me with this... I wrote a silverlight chart that gets it's data from a wcf service using linq to sql the following code fails and I have no idea why.

DataClasses1DataContext db = new DataClasses1DataContext();
var speeds = db.sao_GetMonthlyInterfaceData(Convert.ToInt64(code), routerSpeed, dateFrom, dateTo);List<String> values = new List<string>(); 
List<sao_GetMonthlyInterfaceDataResult> sp = speeds.ToList<sao_GetMonthlyInterfaceDataResult>();
IEnumerator<sao_GetMonthlyInterfaceDataResult> enumerator = sp.GetEnumerator();while (enumerator.MoveNext()) 
{
sao_GetMonthlyInterfaceDataResult val = ((sao_GetMonthlyInterfaceDataResult)enumerator.Current);
String ret = ""; 
ret += Convert.ToString(val.BpsIN );
ret += " "; 
ret += Convert.ToString(val.BpsOUT);
ret += " ";ret += Convert.ToString(val.UpdateTime); 
values.Add(ret); 
}
return values;
</pre>

Maby someone out there can help with this.

Thanks

S 

<div class="ForumSig">Stephen Lintott Bsc IT (RAU)</div>

Re: Linq to SQL failing

Judah Gabriel Himango10-Jun-08 6:17

Judah Gabriel Himango

10-Jun-08 6:17

It's hard to diagnose a problem with no description of what line in particular is failing as well as what message you're receiving.

Re: Linq to SQL failing

Stephen Lintott10-Jun-08 20:25

Stephen Lintott

10-Jun-08 20:25

When running the app I get the following. In the previous code if I remove the LINQ call the error seems to disapear... Sorry for not including the error, after looking at this code for the time I have one tends to forget that everyone doesn't have the same problem.
Thanks
S

An exception of type 'System.ServiceModel.ProtocolException' occurred in System.ServiceModel.dll but was not handled in user code

Additional information: [UnexpectedHttpResponseCode]
Arguments:Not Found
Debugging resource strings are unavailable. Often the key and arguments provide sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?linkid=106663&Version=2.0.30226.2&File=System.ServiceModel.dll&Key=UnexpectedHttpResponseCode

Stephen Lintott Bsc IT (RAU)

Re: Linq to SQL failing

Stephen Lintott12-Jun-08 1:35

Stephen Lintott

12-Jun-08 1:35

I got the service up and running. Found some info here http://blog.atrexis.com/index.cfm/2008/5/19/Silverlight-reading-SQL-database-via-WCF-web-service[^]

Stephen Lintott Bsc IT (RAU)

eyalbi00710-Jun-08 4:49

eyalbi007

10-Jun-08 4:49

Hi All,

I'm trying to create an event that the standard ListView doesn't have: fired after a vertical scroll has occured (By pressing arrow key down, arrow key up, mouse click on the vertical scroll bar or by the mouse wheel scroll).

Even when ignoring the mouse events, catching the KeyUp or KeyDown events is not good enough since it's raised before the TopItem change takes place, and not after.

An altenative can be an "TopItemChanged" event, which is raised whenever the TopItem is cahnged. I don't know how to implement this one either.

Thanks a lot!
Eyal.

Tell if a path is a FILE or a Directory

Ian Uy10-Jun-08 4:36

10-Jun-08 4:36

Good Day,

If I want to check if a path is a File or Directory, I always use the Path.HasExtension function. If it have an extension, it is a file. Otherwise, it is a directory.

Just recently, I found out that this is not really effective for Files that doesn't have an extension and for directories that have an extension.

So How can I really really tell if a path is a File or a Directory?

PS: I can't use File.Exist or Directory.Exist.

Thanks! Big Grin | :-D

It is said that the most complex structures built by mankind are software systems. This is not generally appreciated because most people cannot see them. Maybe that's a good thing because if we saw them as buildings, we'd deem many of them unsafe.

Anthony Mushrow10-Jun-08 4:44

Anthony Mushrow

10-Jun-08 4:44

Well you could use...

Ian Uy wrote:
PS: I can't use File.Exist or Directory.Exist.

Damn, why not?

How about

DirectoryInfo DI = new DirectoryInfo("C:\\thing");
if(DI.Exists)
  //its a folder
else
  //its a file

It's exactly the same, but different Roll eyes | :rolleyes:

I can't think of any other way of the top of my head.

My current favourite word is: I'm starting to run out of fav. words!

-SK Genius

Game Programming articles start -here[^]-

Ian Uy10-Jun-08 4:46

10-Jun-08 4:46

Well, the path that I am testing does not really exist. It's hard to explain.

Just think of it as a "programming exercise" given in school and you have to type a random path and tell if it is a file and a folder.

Christian Graus10-Jun-08 5:01

10-Jun-08 5:01

Ian Uy wrote:
Just think of it as a "programming exercise" given in school and you have to type a random path and tell if it is a file and a folder.

Your teacher is a retard. If the file doesn't really exist, and you can't use the presence of extensions to tell, then there is no real solution.

Ian Uy10-Jun-08 5:06

10-Jun-08 5:06

No, its not a school activity. I just made that up to simplify the matter.

Well, this is the real scenario...

I have a function that "ROLLBACKS" files and folders. I have a special routine for files and special routine for folders. Those files and folders does not exist yet, that's why I can't use the .Exists() method.

I just want a function that accepts a PATH and returns if it is a folder or file.

Sorry for the confusion.

Christian Graus10-Jun-08 5:22

10-Jun-08 5:22

Ian Uy wrote:
I just want a function that accepts a PATH and returns if it is a folder or file.

Not possible, for the reasons stated. Your best bet is to assume an extension means it's a file.

Ian Uy10-Jun-08 5:23

10-Jun-08 5:23

Thank you for your time Mr. Graus. Smile | :)

Joe Woodbury10-Jun-08 6:37

Joe Woodbury

10-Jun-08 6:37

As has been pointed out, there is no way to tell if a path is for a directory or file UNLESS there is a directory delimiter (slash) at the end. This isn't guaranteed by almost any function, though.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Events

ellllllllie10-Jun-08 4:11

ellllllllie

10-Jun-08 4:11

Hello,

I have a main form that contains many form. When i am trying to close the main form by the X control box button, the onformclosing event of the child forms are launched before the main form event (onclosing) are launched.
How can i capte the X button closing in the mainform first?

best regards,

dghdfghdfghdfghdgh

Re: Events

Christian Graus10-Jun-08 4:17

How to Flickering in Waveform generated using GDI+

10-Jun-08 4:17

The main form is closing it's children first. This is logical. I am not sure if you can do anything about it.

Re: Events

AndrewVos10-Jun-08 6:44

AndrewVos

10-Jun-08 6:44

You can check the FormClosingEventArgs in FormClosing. Allows you to cancel closing the form. I don't really know if the child forms will stay open, but it sounds logical that they will.

www.andrewvos.com

vinay_K10-Jun-08 4:10

vinay_K

10-Jun-08 4:10

I have an application which generates a sine wave. when i move horizontal bar the waveform is again painting on the panel.. do to this, there is lot of flickering in the waveform..

plz do help me..

Re: How to Flickering in Waveform generated using GDI+

Christian Graus10-Jun-08 4:18

Re: How to Flickering in Waveform generated using GDI+

10-Jun-08 4:18

You can turn on double buffering,

this.SetStyle(

ControlStyles.AllPaintingInWmPaint |

ControlStyles.UserPaint |

ControlStyles.DoubleBuffer,true);

vinay_K10-Jun-08 19:54

vinay_K

10-Jun-08 19:54

I used the above code Flickering is not completely removed, still its slightly fliickering. Is there any way to Remove complete flickering of Waveform.

Whenever the form is resized or the horizontal scrollbar is moved, the waveform starts flickering.. plz do help me..

How to change the classname???

mojo_geo10-Jun-08 3:36

mojo_geo

10-Jun-08 3:36

I create a winform by c# 2003. The form's classname like "windows.forms.app3",I must change the it to the particular name that like "myForm". Thanks for you help.

Re: How to change the classname???

Christian Graus10-Jun-08 3:46