C# Discussion Boards - CodeProject

fady_sayegh19-Jul-05 22:00

19-Jul-05 22:00

hi to all,

i made a web service to communicate with an sql server database.

how can i, raise an event from my web service and catch it in my c# win application. i want to do that because in my c# win application i need to get the sql server informationnal messages (user messages)

i tried to use the delegate, but i think i missed something, does any one have an example.

best regards and thanks in advance

fady

How to Insert Row in winform Datagrid ?

Tushar Bhatt19-Jul-05 21:29

Tushar Bhatt

19-Jul-05 21:29

Can anybody help me with code snippet that can guide me in inserting row in the datagrid control without any data source in the background(i.e. no data connection). I just want to use this datagrid as a source of collecting rows of data from the users. I want to handle insertion of data in database myself.

Re: How to Insert Row in winform Datagrid ?

Gavin Jeffrey19-Jul-05 22:04

Gavin Jeffrey

19-Jul-05 22:04

AFAIK you need to specify the datagrid with a datasource (i stand to be corrected and if somebody knows of a way to do this i would like to hear it). What you could do is just create a DataTable dynamically to add rows. You wouldn't need to link the datatable to anything except the datagrid.

Re: How to Insert Row in winform Datagrid ?

Tushar Bhatt20-Jul-05 19:07

Tushar Bhatt

20-Jul-05 19:07

Thanks.

Communication between windows and web application.

Navees Ahmed19-Jul-05 19:57

Navees Ahmed

19-Jul-05 19:57

Hi,

I am working on windows application which store data in xml and put media elements(like images) in folder. I am making zip file of xml and media element folder. Now I need to send this zip file on web server where my web application will unzip this file and will put xml data to sqlserver and place media elements to specific directory.

My question is, How I can send zip file to web application, I have considered FTP but it is not safe because it needs username and password, is there any other solution, if yes then please help me.

Thanks
navees

Re: Communication between windows and web application.

Gavin Jeffrey19-Jul-05 22:00

Gavin Jeffrey

19-Jul-05 22:00

Create a webservice method that accepts a byte[] as a parameter then just call the method with the zip as a byte[]. Then just rebuild the zip on the webservice side.

sort information in a listbox by name

nidhelp19-Jul-05 19:36

nidhelp

19-Jul-05 19:36

how do i sort information in a listbox by name (that is, alphabetical order)? im doing c# programming n using microsoft visual studio .net 2003.

Re: sort information in a listbox by name

Kodanda Pani19-Jul-05 21:03

Kodanda Pani

19-Jul-05 21:03

Hi,

You can use the Sorted property of the list box to do this. Set the value of this property to "True".

Thanks and Regards
Pani.

nid codes for project

nidhelp19-Jul-05 19:23

nidhelp

19-Jul-05 19:23

hi.. im new to c#.. got to do a project to display data (that was downloaded from another PC to my PC) on bar graphs like those u can find in www.advsofteng.com/gallery_bar2.html > graph titled 'Product Revenue For Last 3 Years'.. i nid the codes to produce such a graph and which reflects my data on the graph..

In order for the graph to b displayed, i nid to let user click on tree view (on the tree view there's medicine 1, medicine 2 and medicine 3).. Under each of the medicine, user shd b able to click on any of the months (jan to dec) and a graph will display the date and time of medicine taken for dat particular month..

If the patient did not take medicine on certain dates eg. 2 july and 6july, it shd reflect bars on all the dates except on 2july n 6 july.

thz a lot! any help is appreciated..

ps: im using microsoft visual studio .net 2003

Virtual Keyboard help plz

arun_appu19-Jul-05 18:22

arun_appu

19-Jul-05 18:22

i have created an on screen Virtual keyboard
what i did was i found the handle for the web browser form and directly used the send keys fn:-

IntPtr webHandle = FindWindow("WindowsForms10.Window.8.app3", "Web Browser");
if (webHandle == IntPtr.Zero)
{
MessageBox.Show("Form is not running.");
return;
SetForegroundWindow(webHandle);
SendKeys.Send("{a}");
}
The problem is that no keys are going inside WebBrowser control.
Please help me urgently.
Thankyou
Arun Appukuttan

Re: Virtual Keyboard help plz

Nick Parker19-Jul-05 18:32

Nick Parker

19-Jul-05 18:32

That isn't enough, you need to get the handle to the textbox you want to send text to. You might try EnumChildWindows where you pass it the handle to the browser control. You might also consider calling SendMessage and passing it WM_SETTEXT (0x000C) with the handle to the textbox instead of using SendKeys.

[DllImport("user32.dll")]
static extern bool EnumChildWindows(IntPtr hwndParent, EnumWindowsProc lpEnumFunc, ref IntPtr lParam);

- Nick Parker
Microsoft MVP - Visual C#
My Blog | My Articles

ListView Item Selection

takkung19-Jul-05 18:05

takkung

19-Jul-05 18:05

Hi everybody!!
I 've a problem about ListView In my Windows Form Application. I 've created a song playlist editor that use list view to display the songs and I have move up and move down button for move the song up and down in the list view. But when I push the move up or move down button the row selection will disappear because it lost focus.
Does anyone know how can I preserve the row selection of list view because it doesn't have SetSelected method like ListBox Control?
Thank you and sorry for about my English.

Re: ListView Item Selection

Nick Parker19-Jul-05 18:16

Nick Parker

19-Jul-05 18:16

takkung wrote:
Does anyone know how can I preserve the row selection of list view because it doesn't have SetSelected method like ListBox Control?

Yep, set the ListView.HideSelection[^] property to false.

- Nick Parker
Microsoft MVP - Visual C#
My Blog | My Articles

Re: ListView Item Selection

takkung19-Jul-05 21:43

takkung

19-Jul-05 21:43

I already set ListView.HideSelection but I can't presserve highlighting from a selected item. I think when I select an item and I push Move Up button then the listview control need to be repaint the control because the items in the listview control has changed so the highlighting will be disappear.
The problem is how can I preserve the highlighting at the item that I 've moved up or moved down so I can continue to move that item up or down again and so on. In Listbox control there 's SetSelected method so it can highlight the moved up/down item but in ListView it doesn't have SetSelected method.
this is my code( Move up button click event handler )

int curIndex = this.listSelectedSongs.Items.IndexOf(listSelectedSongs.SelectedItems[0]);
ListViewItem aboveTmpItem = (ListViewItem)this.listSelectedSongs.Items[curIndex-1].Clone();
ListViewItem curTmpItem = (ListViewItem)this.listSelectedSongs.Items[curIndex].Clone();
this.listSelectedSongs.Items[curIndex-1] = curTmpItem;
this.listSelectedSongs.Items[curIndex] = aboveTmpItem;

Re: ListView Item Selection

takkung19-Jul-05 22:19

takkung

19-Jul-05 22:19

I 've already set ListView.HideSelect = false but it can't preserve the highlighting. I think because when I select an item
and push move up/down button the items in ListView.Items has changed and ListView Control will be repaint so the
highlighting will disappear.
The problem is I want the highlighting is preserve at the selected item event through it has moved up or down.
In ListBox control there 's SetSelected method to select an item to highlight but in ListView Control there is no such method.
Thank you very much.

Re: ListView Item Selection

Nick Parker20-Jul-05 1:50

Nick Parker

20-Jul-05 1:50

Ok, I am with you now. I have actually run into this problem before. I solution is to perform the redrawing of the selected ListViewItem yourself.

- Nick Parker
Microsoft MVP - Visual C#
My Blog | My Articles

Flicker-free Refesh

Justin Clayden19-Jul-05 16:56

Justin Clayden

19-Jul-05 16:56

I'm doing some graphics work, using Bitmap objects, and a timer that calls the form's Refresh() method. This works, but it updates the entire form, and it flickers. I know it's possible to avoid this, but I'm not sure where to start. Any clues?

Thanks in advance,
Justin Clayden

===================================
| Justin James Clayden \
| Director, Cool Fusion Multimedia \
| mailto:justy@coolfusion.com.au \
| http://www.coolfusion.com.au \
| http://www.arch.usyd.edu.au/~jcla8108 \
=========================================

Re: Flicker-free Refesh

Alomgir Miah19-Jul-05 17:36

Alomgir Miah

19-Jul-05 17:36

Use double bufferring.

Thanks
Alam
Live Life King Size

networking questions ?

snouto19-Jul-05 15:51

snouto

19-Jul-05 15:51

iam developing server \client applications and i ask if this code can work on the real internet network or not
here is the code for my file transmission server listening thread.

<br />
Socket ServSock = new Socket(AddressFamily.Internetwork,Sokettype.Stream,ProtocolType.Tcp);<br />
IpHostEntry iphost = Dns.Resolve(Dns.GetHostName());<br />
IpAddress thisip = iphost.AddressList[0];<br />
IpEndPoint myendpoint = New IpEndPoint(thisip,(Int32)7291));<br />
ServSock.Bind(myendpoint);<br />
ServSock.Listen(-1);<br />

This Code will get the local ip address of the computer it is running on and connected to the internet and listens for any Clients' Socket Requests and with small other portions of codes it will accepts the client connection in this part there is the main server that will be running on any webserver like any dedicated webserver so the above code will be run when one user A wants to send a file to the other user B the main server on the webserver will send to B the ip address of the networkstream of A so B will begin to initialize an ipendpoint for this client A on B's Client Application as follows.

<br />
Socket clientSock = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);<br />
IpHostEntry remoteiphost = Dns.Resolve("A's Ipaddress that sent by the main server");<br />
IpAddress remoteA = remoteiphost.AddressList[0];<br />
IpEndPoint Aendpoint = new IpEndPoint(remoteA,(Int32)7291);<br />
clientSock.Connect(Aendpoint);<br />
if(clientSock.Connected)<br />
{<br />
//here is the code for getting the file in binary format<br />
}<br />

The Question is:
----------------
Can the server and client be connected to each other even if these users using dialup connection or both using Dsl or one differs than the other in the type of connection .....? Cause i tested it on my local pc and it works and i tested it over real network in too many computers connected together in internal network as in cybers but can be connected also over the internet ?

Please Help me .

Miss With The Best And Die Like The Rest

Events

noneformenoneforme19-Jul-05 15:08

noneformenoneforme

19-Jul-05 15:08

Can somebody tell me what is the benefit of using events?
Are there any performance gains? What is the point?

Re: Events

Christian Graus19-Jul-05 15:17

Christian Graus

19-Jul-05 15:17

In what regard ?

There are no performance gains, there is a loss, in terms of a lookup being required to find the method to call.

The reasons are:

1/ Events in general are the model that make software like Windows possible. An event is the only way to have a button, for example, and run some code if it is clicked.

2/ If you mean delegates in general, they allow different classes to communicate, and provide things like a callback mechanism from one class to another, so for example, in my C# paint program, an instance of the tool class, which is a specific drawing tool, can fire an event to let the main code know that a drawing event has occured, and to send the details so it can be added to the event list ( the code uses a list of drawing actions to facilitate easy undo/redo ).

Christian Graus - Microsoft MVP - C++

Re: Events

Nick Parker19-Jul-05 15:23

Nick Parker

19-Jul-05 15:23

I might suggest you read Handling and Raising Events[^], part of the .NET Framework Developer's Guide.

- Nick Parker
Microsoft MVP - Visual C#
My Blog | My Articles

Re: Events

Christian Graus21-Aug-05 15:29

Christian Graus

21-Aug-05 15:29

hi Nick. You're a C# MVP ? Will I see you in Seattle ?

This guy probably didn't read your link, he asked another question of me today, then got really rude because I gave an MSDN link that didn't include full cut and paste code for what he was trying to do.....

Christian Graus - Microsoft MVP - C++

Visual Studio style options dialog

Rob Tomson19-Jul-05 13:27

Rob Tomson

19-Jul-05 13:27

Does anyone know of a control or method for creating an options dialog like that used by visual studio? Basically there's a treeview on the left side of the dialog and depending on what you select it displays the panel that's associated to that node. I tried to implement this with a tabcontrol in vs2005 but there's no way to hide the tabs at the top. Can I just override that pain event?

Thanks,
Rob Tomson

--
There are 10 kinds of people. Those who understand binary and those who don't.

Re: Visual Studio style options dialog

Luis Alonso Ramos19-Jul-05 14:57

Luis Alonso Ramos

19-Jul-05 14:57

Use a big panel with user controls inside, and just show the user control for the selected tree item.

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.