C# Discussion Boards - CodeProject

Peace ON16-Jul-10 19:05

16-Jul-10 19:05

hi DaveyM69,

Thanks for you suggestion.
However, I never told that the solution I gave is best one or does not have any
side effects.

I have just suggested one of the quick and easy solution, that I thought.
Anyway, thanks once again for your suggestion.

HTH

Jinal Desai - LIVE
Experience is mother of sage....

Re: Name of a derived Form

Luc Pattyn16-Jul-10 3:51

Luc Pattyn

16-Jul-10 3:51

you probably want the type information, not the name. You could use the GetType() method, or the is/as keywords. But I don't think you should go that route.

If FormD needs a different finalization from FormA, you really should solve it by providing it with its own specialized Dispose() method.

Since disposing/finalization are non-deterministic (e.g. they won't always happen when your app terminates), you should solve this differently, probably based on the FormClosing/FormClosed events (which you can override too so you could specialize them for all kinds of Forms).

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

modified on Friday, July 16, 2010 10:09 AM

Re: Name of a derived Form

PIEBALDconsult16-Jul-10 5:01

PIEBALDconsult

16-Jul-10 5:01

That sounds like a bad OOP design. A base class should never need to know about any derived classes.

You could write a factory or manager class that knows what's going on and can do what's needed.

But you probably just need to get the polymorphism right.

Re: Name of a derived Form

T M Gray16-Jul-10 6:23

T M Gray

16-Jul-10 6:23

Why do you need the name of the form? I assume you mean the class name and not the name of the instance variable. If you used generics in your methods that would probably solve a whole lot of this.

Re: Name of a derived Form

Flo123422-Jul-10 23:57

Flo1234

22-Jul-10 23:57

I need the name of the form to load(in the constuctor) and save(in the destructor) some information of the grid.
So I need the name of the instance variable to get a unique name.

Changelog tools for Visual C#

grmihel216-Jul-10 3:18

grmihel2

16-Jul-10 3:18

Hi guys,

I'm using Visual C# to program a WinForms application. I'm using ClickOnce as deploy method, which working fine, and I have a GoogleCode directory to handle with the SVN sstem (using AnkhSVN installed in VS08 at the moment).
But I'm missing some way that I can show a changelog when the ClickOnce says to the user that there is an update of the application, on application start. What tools do you guys use for the changelog system?
And another question, I just have a plain ClickOnce installed now, but is it possibel to make my own installing screens for the ClickOnce application, where I can get the user to choose some setups etc.?

Hope some of you VS experts will help me. Imo its some nice features that is very useful (and doubt they doesn't exist) Smile | :)

Re: Changelog tools for Visual C#

Peace ON16-Jul-10 3:25

Peace ON

16-Jul-10 3:25

Following links will give you answer of your second question.

http://msdn.microsoft.com/en-us/library/k5befhe3%28VS.80%29.aspx[^]

http://todotnet.com/post/2005/10/11/Customize-the-Default-Web-Page-for-a-ClickOnce-Application.aspx[^]

HTH

Jinal Desai - LIVE
Experience is mother of sage....

Mail Extract App

NDBUK16-Jul-10 3:16

NDBUK

16-Jul-10 3:16

Hi All,

Hope everyone is well? I'm hoping somebody could point a newbie in the right direction?

Basically we have a mailbox on our exchange server called backups@domain.co.uk.

This mailbox receives all the backup logs from our 30+ servers, and each mail contains an attached TXT or HTML file. I need the app to either monitor the mailbox direct or via using outlook, when the mail comes in the app should look at the subject line, take the attachment and move it to a folder under the servername (Found in the subject line) and then save the textfile with the days date.

For example SERVER1 in the subject line - The App should move the attached text file to:

C:\BackupLogs\Server1\16-07-2010

Hope that makes sense. Im fairly new to c# but dont mind a bit of reading. I would be greatful if someone could point me in the direction of a example app or code/reading meterial?

Cheers
Si

Re: Mail Extract App

Bernhard Hiller16-Jul-10 5:39

Bernhard Hiller

16-Jul-10 5:39

You need e.g. a POP3 client (e.g. POP3 Email Client with full MIME Support (.NET 2.0)[^]) which retrieves the mails from the server. Then do the further processing as you described above.

Skype multiple user auto login

Etienne_12316-Jul-10 2:25

Etienne_123

16-Jul-10 2:25

Hi
I`m creating a C# desktop application that acts as a portal to various other fearures, one of which is Skype. My application will have multiple users. I will store each user's Skype login details in a SQL database. Would there be any way to log a user in automatically using the user's username and password from the database?

The process flow must be something like this:
User clicks on Skype button > Skype launches > Corresponding user's details are read out the database > User logged into Skype without username and password prompt

Re: Skype multiple user auto login

Peace ON16-Jul-10 2:35

Peace ON

16-Jul-10 2:35

I have found few useful links for the same.
Just go through it.

Controlling Skype with C#[^]

http://blogs.skype.com/devzone/2006/12/c_example_project_for_skype4co.html[^]

http://forum.skype.com/index.php?showtopic=73172[^]

HTH

Jinal Desai - LIVE
Experience is mother of sage....

Single sign on with access token

Etienne_12316-Jul-10 1:21

Etienne_123

16-Jul-10 1:21

First of all, I know this question is only partially relevant to C#, so sorry for posting it here.

I am trying to implement Facebook single sign on using a desktop application. The one thing I figured out so far is to retrieve an access token.
How I retrieve the access token:

browserFacebook.Navigate(@"https://graph.facebook.com/oauth/authorize?client_id="+ FacebookApplicationID + "&redirect_uri=http://www.facebook.com/connect/login_success.html&type=user_agent&display=popup");

This redirects the user to page where he/she must first authorize the application. Once authorized, I redirect the user to "http://www.facebook.com/connect/login_success.html" as specified in the above address. I then intercept this URL to retrieve the access token like so:

string someString = browserFacebook.Url.ToString();

This returns something like the following:

"http://www.facebook.com/connect/login_success.html#access_token=ACCESS TOKEN.expires_in=0"

I can then easily use this access token with the Graph API to access an users facebook details as in the following code:

Facebook.FacebookGraphAPI g = new FacebookGraphAPI("ACCESS_TOKEN");
var fbUser = g.GetObject("me", null);

Can I also use this token somehow to simply log a user in to the site? My goal is not really to develop a complete new facebook application as my application is simply a prototype.

Datetime Picker and Datagridview

ronaldrahme16-Jul-10 0:36

ronaldrahme

16-Jul-10 0:36

Hello everyone,

I am trying to set a column in my datagridview to be as datetimepicker column only.

It is so easy to do it if my datagridview is not binded within database, i did it by making a user control which transform datagridviewtextboxColumn to datetimepicker from Calendar().

But my question: i dont want to add a new column in my datagridview of type datetimpicker or maybe something else like datagridviewComboBoxColumn or else, i just want to change my column type:

For example changing DatagridviewTextBoxColumn to datetimepicker
or
DatagridviewTextBoxColumn to DatagridviewComboboxColumn

This can be done easily by setting my datagridview columns to specific columns, but my main concern is that my datagridview is already binded.

Hope i can have any help, coz this issue took lot of my time.

Thanks in advance.
Ronald

Re: Datetime Picker and Datagridview

Peace ON16-Jul-10 1:38

Peace ON

16-Jul-10 1:38

You cannot change column at run-time.
You cannot turn combobox column to datetimepicker column at run-time.

You can only decide column type at creation time.
Refer this[^] link for more information.

HTH

Jinal Desai - LIVE
Experience is mother of sage....

Facebook session key question

Etienne_12316-Jul-10 0:04

Etienne_123

16-Jul-10 0:04

Hi
I'm using a WebBrowser control to enable users to browse Facebook, or atleast this is my goal.
Once I retrieved a Facebook session key, how do I redirect the browser to the Facebook Home page? Also, can I store a session key for each user and use this to log them in without having to prompt them for login details each time?

I retrieve the session key by directing the web browser to the url below and then intercepting this url:

browserFacebook.Navigate(@"http://www.facebook.com/login.php?api_key=" + FacebookAPIKey + @"&connect_display=popup&v=1.0&
next=http://www.facebook.com/connect/login_success.html&cancel_url=http://www.facebook.com/connect/login_failure.html&
fbconnect=true&return_session=true&session_key_only=true&req_perms=read_stream,publish_stream,offline_access");

Re: Facebook session key question

Eddy Vluggen16-Jul-10 0:47

Eddy Vluggen

16-Jul-10 0:47

I'm not familiar with Facebook, but isn't the API key tied to the application? (As opposed to the user?)

You can register your application here[^], and they'll provide a key for your application.

I are Troll Suspicious | :suss:

Re: Facebook session key question

Etienne_12316-Jul-10 0:50

Etienne_123

16-Jul-10 0:50

Yes it is, but I was talking about the session key, not the API key Smile | :)

Re: Facebook session key question

Eddy Vluggen16-Jul-10 0:55

Eddy Vluggen

16-Jul-10 0:55

The Session is only valid for 24 hours.

I are Troll Suspicious | :suss:

Re: Facebook session key question

Etienne_12316-Jul-10 1:04

Etienne_123

16-Jul-10 1:04

Apparently not if you set the expiry time to 0. Anyway, I don't think this is the best way to try and implement single sign-on. I'm just giving it a shot since I'm kind of at a dead end. I've got all the users' usernames and passwords, I just need to find a way to log them in automatically Frown | :(

Re: Facebook session key question

Eddy Vluggen16-Jul-10 1:13

Eddy Vluggen

16-Jul-10 1:13

Etienne_123 wrote:
Apparently not if you set the expiry time to 0.

Don't know where you got this information, but the docs[^] state something else;

Users don't log out of desktop applications. A user's session expires after 24 hours, 
or when the user closes your application. If you need to, you can terminate a user's
session by calling auth.expireSession.

I are Troll Suspicious | :suss:

Re: Facebook session key question

Etienne_12316-Jul-10 1:19

Etienne_123

16-Jul-10 1:19

Exactly - OR when the user closes the application. My application is meant to be run 24/7.

Re: Facebook session key question

Eddy Vluggen16-Jul-10 3:23

Eddy Vluggen

16-Jul-10 3:23

Is that a AND/OR or XOR? Sessions are usually temporary, and according to the docs I just been reading, you'd want to request "offline access". See the bottom of this[^] page.

I are Troll Suspicious | :suss:

Help Regarding DATARELATIONSHIP

amaankhan15-Jul-10 21:20

amaankhan

15-Jul-10 21:20

Please Friends Help me

i have 4 tables
1. Master Book Table (MBookId,BookId,AuthorId,PubId)
2. Book Name ( BookId,BookName)
3. Author Name (AuthorId,AuthorName)
4. Publisher Name (PubId, PubName)

DAL
UI Layer

DAL ----
Please suggest me how to achieve Datarelationship

DataRelation dr = new DataRelation("BookBookName",
                ds.Tables["MBook"].Columns["BookId"],
                ds.Tables["Book"].Columns["BookId"]);

            ds.Relations.Add(dr);

is this right ?

and how to use this in UI to get data, insert,update, save.. etc

i google a lot but didn't find the right solution for my purpose

and is datarelation ship with dataset is better or NHIBERNATE

if nhiberate is better then do ineed to start in from start i mean i have to create the tables and all that once..........

i have already created the datatable and DAL methods of Save Edit etc....

Please Help

Thank you very much EveryOne..... (specially CODEPROJECT)

Re: Help Regarding DATARELATIONSHIP

Peace ON15-Jul-10 21:33

Peace ON

15-Jul-10 21:33

You need to do following.

DataRelation dr = new DataRelation("BookBookName",
                ds.Tables["MBook"].Columns["BookId"],
                ds.Tables["Book"].Columns["BookId"]);

DataRelation dr1 = new DataRelation("BookAuthorName",
                ds.Tables["MBook"].Columns["AuthorId"],
                ds.Tables["AName"].Columns["AuthorId"]);

and so on.
So you have finally four datarelation object.
Then add all relation object to dataset, like..

ds.Relations.Add(dr);
 ds.Relations.Add(dr1);
 ds.Relations.Add(dr2);

You can do navigation as follows

foreach (DataRow MBookRow in customerOrders.Tables["NBook"].Rows)
{
    Console.WriteLine(MBookRow["MBookId"].ToString());

    foreach (DataRow BNameRow in MBookRow.GetChildRows(dr1))
    {
        Console.WriteLine(BNameRow["BookId"].ToString() + " " + BNameRow["BookName"].ToString());
    }
}

Refer this[^] link for DataSet Vs NHibernate.

HTH

Jinal Desai - LIVE
Experience is mother of sage....

Circular dependency in dlls

Blubbo15-Jul-10 7:53

Blubbo

15-Jul-10 7:53

Is there such good examples or explaination for this issue?

right now, I've got this....

Project A
* calling SeekHidDevices in Project B
* ReadPort method

Project B
* SeekHidDevices method & calling ReadPort method in Project A
* returns SeekHidDevices value back to Project A

I've got 2 devices but only got 1 (crashes when doing the 2nd devices in SeekHidDevices method during ReadPort calling.

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