C# Discussion Boards - CodeProject

satsumatable29-Jun-09 17:34

29-Jun-09 17:34

Is it possible to create a custom control with two buttons that is , one custom control has to have two buttons together with different events. Is it possible? If so please give me some kick-off points.

Re: Create Custom Control

dan!sh 29-Jun-09 17:50

dan!sh

29-Jun-09 17:50

Yes it is possible.[^]

Re: Create Custom Control

Rajesh R Subramanian29-Jun-09 22:39

Rajesh R Subramanian

29-Jun-09 22:39

Looks like the possibilities are infinite.

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Create Custom Control

EliottA30-Jun-09 2:55

EliottA

30-Jun-09 2:55

Rajesh R Subramanian wrote:
Looks like the possibilities are infinite.

No, only 1.4 million possibilities. (from that link) Poke tongue | ;-P

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Network connections detecting

steve_rm29-Jun-09 14:51

steve_rm

29-Jun-09 14:51

Hello,

VS 2008 SP1

I am using the code below to test whether the user is connected using either a wireless or LAN connection. i.e. that the cable is plugged in, or the wireless is switch off. The code works fine for this. However, if you can spot any potential problems with this or you know of a better way I would be interested to learn more.

However, the client would like us to check if the user is connected using a modem as well. As you can see from my source code I am looking for connection that start with either "Local Area Connection" or "Wireless Network Connection". This is ok.

However, the problem is that the modem name could be anything, as when the user sets up their modem connection using the 'new connection wizard' they can call this anything. So if my switch statement I don't know what to look for.

Any suggestions would be most helpfull,

// Checks if Network is either connected by LAN or Wireless
        public bool IsNetworkConnected()
        {
            NetworkInterface[] networkCards = NetworkInterface.GetAllNetworkInterfaces();
            bool connected = false;

            // Loop through to find the one we want to check for connectivity.
            // Connection can have different numbers appended so check that the 
            // network connections start with the conditions checked below.
            foreach (NetworkInterface nc in networkCards)
            {
                // Check LAN
                if (nc.Name.StartsWith("Local Area Connection"))
                {
                    if (nc.OperationalStatus == OperationalStatus.Up)
                    {
                        connected = true;
                    }
                }

                // Check for Wireless
                if (nc.Name.StartsWith("Wireless Network Connection"))
                {
                    if (nc.OperationalStatus == OperationalStatus.Up)
                    {
                        connected = true;
                    }
                }
            }

            return connected;
        }

Re: Network connections detecting

Eslam Afifi29-Jun-09 16:44

Eslam Afifi

29-Jun-09 16:44

Why search by adapter name! It can be renamed. There is the NetworkInterfaceType property in the NetworkInterface class so you can know if an adapter is a GenericModem, Ethernet...
Network.IsAvailable[^] indicates network availability (which can be just a LAN without internet access). NetworkInterface.OperationalStatus indicates network adapter state. Both don't indicate internet access which I assume it's what you seek. In this case, use the System.Net.NetworkInformation.Ping class.

Eslam Afifi

Proper way of creating a form with multiple pages

shultas29-Jun-09 14:16

shultas

29-Jun-09 14:16

Hello Everyone-

I'm just getting started with doing some Windows Forms programming. I'm wondering what the proper way to go about designing a Form with multiple pages in it is. I am wondering if there is a way to design this all in the Visual Studio Editor rather than create all the controls in code and place them.

Here's an example of what I want to do. If you've ever seen Outlook. Left hand side there is a bunch of options. Calendar, Mail, etc. You click Calendar and the right hand page shows you the calendar view. If you click on Mail, the right hand side shows you your mail. I'm looking to have functionality similar to this. You select an option on the left hand side, and the right hand page is displayed based on what the end user wants to do.

I'm wondering if it is possible to create all of this in the Visual Studio Editor so I can draw controls and size them and all that good stuff. What I am basically looking to do is almost have a Tab Control on the right hand side with multiple tabs and different controls on those tabs, and the ability to edit them easily in the editor (like with the tab control, you click on the page and presto, you can draw whatever you like on there) ... looking for the tab control without the tabs on the top!

Thanks so much in advance. I'm just looking to be pointed in the proper direction is all. Spent two hours searching but can't find exactly what I am looking for.

Re: Proper way of creating a form with multiple pages

Christian Graus29-Jun-09 14:58

Christian Graus

29-Jun-09 14:58

shultas wrote:
I am wondering if there is a way to design this all in the Visual Studio Editor rather than create all the controls in code and place them.

Of course - there's a forms designer in visual studio.

The way I'd do this, is to create controls for all the views, put them all in a control, and just change which one is visible as the option is selected to show them.

Christian Graus

Driven to the arms of OSX by Vista.

"! i don't exactly like or do programming and it only gives me a headache." - spotted in VB forums.

I can do things with my brain that I can't even google. I can flex the front part of my brain instantly anytime I want. It can be exhausting and it even causes me vision problems for some reason. - CaptainSeeSharp

Re: Proper way of creating a form with multiple pages

shultas29-Jun-09 15:39

shultas

29-Jun-09 15:39

Ok I'm familiar with the form designer in VS. What I'm not familiar with is ... "create controls for all the views, put them all in a control, and just change which one is visible". So "Put them all in a control", what control? What would I draw using the forms designer to place all of these controls into? I was thinking of something such as a panel, but when I set Visible of the panel to false in the designer it does not "disappear" from view, making it impossible to draw multiple panels with multiple controls and design it easily.
Thanks!!

Re: Proper way of creating a form with multiple pages

Christian Graus29-Jun-09 15:54

Christian Graus

29-Jun-09 15:54

shultas wrote:
So "Put them all in a control", what control?

Any control you like. Create a user control for each pane, you can set that up in the designer. create a control to hold them all with a property to set which one is visible.

shultas wrote:
when I set Visible of the panel to false in the designer it does not "disappear" from view,

Which is why you create each one as a seperate control, THEN put them all together.

Re: Proper way of creating a form with multiple pages

shultas29-Jun-09 15:58

shultas

29-Jun-09 15:58

Righteous. That's exactly what I was looking for, the proper thing to do, which appears to be a User Control! Now I can go look up how to do that! Thank you very much I really appreciate you taking a few moments to help me out.

Re: Proper way of creating a form with multiple pages

Christian Graus29-Jun-09 16:19

Christian Graus

29-Jun-09 16:19

no worries, glad to help.

Re: Proper way of creating a form with multiple pages

EliottA29-Jun-09 15:51

EliottA

29-Jun-09 15:51

I agree this is my approach as well, one main application view which has a panel or any sort of container to hold other possible views, this makes for the best possible approach as far as i know to allow as much extensionability or maintainability as possible.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Need to search a webpage for a word OR search links in it

p3rson29-Jun-09 12:47

p3rson

29-Jun-09 12:47

Hey,
I'm programming a little app, and I need a code in order to search a web page for a word, and clicking on it or copying it etc.
Or if that is hard, maybe extract all the links into a file and then searching the file..

Any of these will do it.

Obviously C#..

Thanks Smile | :)

Re: Need to search a webpage for a word OR search links in it

scottgp29-Jun-09 13:38

scottgp

29-Jun-09 13:38

Well, the standard answer for this type of question is...
try here: http://www.rentacoder.com/RentACoder/DotNet/default.aspx[^]

Re: Need to search a webpage for a word OR search links in it

EliottA29-Jun-09 13:49

EliottA

29-Jun-09 13:49

Are you asking for a suggestion on where to start researching, what design pattern you should use for this type of application, whether it should be web based or forms based?

I don't see the question.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Re: Need to search a webpage for a word OR search links in it

p3rson29-Jun-09 22:39

p3rson

29-Jun-09 22:39

I thought that I could ask for the code in here..
So I was asking for the code if anyone can do it.

Re: Need to search a webpage for a word OR search links in it

J4amieC29-Jun-09 23:19

J4amieC

29-Jun-09 23:19

p3rson wrote:
I thought that I could ask for the code in here..

You can, but like everywhere else in the world if you want something done for you, you pay for it.

Re: Need to search a webpage for a word OR search links in it

DaveyM6929-Jun-09 23:33

DaveyM69

29-Jun-09 23:33

Free source code is available in most of the articles. Search them and see if any do what you require, check the applicable licence and away you go.

If you want to write the code yourself, then have a go and if you get stuck, ask in the forums and we will help if we can with specific problems.

If you want code writing, then this is the wrong place. You will have to pay for that and use somewhere else - such as the site that was linked to in an earlier reply.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: Need to search a webpage for a word OR search links in it

EliottA30-Jun-09 2:45

EliottA

30-Jun-09 2:45

I think the other posts burned you well enough.

At Codeproject, learning is encouraged over seeking free work. You can try and we can help, but we will not construct an entire project for you without payment.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Re: Need to search a webpage for a word OR search links in it

p3rson30-Jun-09 8:53

p3rson

30-Jun-09 8:53

ok i understood..
thx anywayz

Problem with reading excel 2007.

hdv21229-Jun-09 12:43

hdv212

29-Jun-09 12:43

Hi i use this article to reading excel 2007 via c# :
Loading and reading the Microsoft Excel file contents using C#[^]

but the following error display me :
Old format or invalid type library. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD))

this error ocuured in this line :

Workbook workbook = app.Workbooks.Open(path,
                  0,
                  true,
                  5,
                  "",
                  "",
                  true,
                  XlPlatform.xlWindows,
                  "\t",
                  false,
                  false,
                  0,
                  true,
                  1,
                  0);

how to solve this problem ?
thanks

Filter DataTable

skyline9229-Jun-09 12:26

skyline92

29-Jun-09 12:26

Hey guys!

I have two datagridview's. Both have the same datasource (a datatable).
Now the datatable contains an email address in every row. I have a function to validate an email address.
I want to display the rows with malformed email-addresses in the second datagridview without loosing the connection to the datatable, so that if I delete a row in the second datagridview, it should also appear in the first datagridview.
Is it somehow possible to filter the rows in the second datagridview?
How would you solve this problem?

Thank you guys!

Skyline

Re: Filter DataTable

Henry Minute29-Jun-09 13:35

Henry Minute

29-Jun-09 13:35

Provide a separate BindingSource for the second DataGridView. then use the filter mechanism of this BindingSource. See A Detailed Data Binding Tutorial[^] for more detail.

skyline92 wrote:
so that if I delete a row in the second datagridview, it should also appear in the first datagridview.

I'm not sure if I correctly understand this part of your question. But unless you do some trick handling for the delete in the second DataGridView, any rows deleted will be removed from the DataTable on commit and will therefore be deleted in the first DataGridView as well.

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Re: Filter DataTable [modified]

skyline9230-Jun-09 6:38

skyline92

30-Jun-09 6:38

Hey!

Thank you for your answer!
That helped me a lot!

My current solution looks as follows:

frmMailBatchMalformedMails frm_malformedMails = new frmMailBatchMalformedMails();
frm_malformedMails.GridViewDataSource = this._boMailbatch.GetMalformedAddressesView();
frm_malformedMails.Show();

-----------------------

public DataView GetMalformedAddressesView()
{
    EnumerableRowCollection<DataRow> malformedMailsQuery =
        from addressRow in AddressTable.AsEnumerable()
        where !ValidateMailAddress(addressRow[MailColumnIndex].ToString())
        select addressRow;

    return malformedMailsQuery.AsDataView();
}

I think that is a good solution (also includes LINQ for filtering the malformed mail addresses in the rows).
Is it possible to save the changes in the second datagridview temporary and show the changes in the first datagridview only then, when the user clicks the save-button?
How would you solve that?

Thank you very much! Thumbs Up | :thumbsup:

modified on Tuesday, June 30, 2009 12:57 PM

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