Re: Need advise about desktop application - C# Discussion Boards

DaveyM6914-Jan-09 0:57

DaveyM69

14-Jan-09 0:57

Doesn't sound too difficult. What have you got so far and what bits of your code aren't working as expected?

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)

Pete O'Hanlon14-Jan-09 1:28

Pete O'Hanlon

14-Jan-09 1:28

Right - here's how to solve your homework.

You have a good set of requirements there. Are there any areas you are unsure about from the requirements? If yes, seek clarification.

Once you are sure you fully understand the requirements, put a use case together to show how a user would interact with this. For such a trivial problem, the use case will be simple. You may also want to put together an activity diagram to help clarify points.

Now, your thoughts should really be coming together on this, so you are now ready to commit to a design. I'd recommend roughing out a class structure on paper.

Now, follow TDD practices to physically create your application. Remember to test for edge cases - these always end up catching people out.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Christian Graus14-Jan-09 2:28

Christian Graus

14-Jan-09 2:28

You're going to fail your course, even if someone does this for you. So, practice with me 'do you want fries with that ?'

Christian Graus

Driven to the arms of OSX by Vista.

musefan14-Jan-09 2:54

musefan

14-Jan-09 2:54

Do you think people write these kind of posts just because they know lots of people will reply to complain about them?

Windows service suggestions

leckey14-Jan-09 3:21

leckey

14-Jan-09 3:21

Change majors.

"Well, we're getting "F"'d at work. WPF, WCF, and WWF... WTF?" --John Simmons

mpavas14-Jan-09 0:00

mpavas

14-Jan-09 0:00

Hello,

I am creating a windows service which performs 20 operations based on some condition. So at one time one process will be executed.

All these 20 different tasks are separate assemblies added to the windows service. The objects and the call to the assembly will be made only when needed.

For example:

Case "findcustomer"
create object
process

Case "findVendor"
create object
process

Is this approach a good idea? Also I want to know what needs to be keep in mind related to design of this service.

Regards,
Pavas

Regards,
Pavas

Need advise about desktop application

Haim Nachum13-Jan-09 22:28

Haim Nachum

13-Jan-09 22:28

hi. im thinking of building a multi user game that works over the internet but the clients are a desktop applications.
that means that the application will have to talk to a server on the internet and im not sure about what technology to use when sending messeges between the client and server.

is it "expensive" for example to use web service to communicate with the application?

what is the common use technology when developing such application?

Re: Need advise about desktop application

SeMartens13-Jan-09 23:14

SeMartens

13-Jan-09 23:14

Hi,

what do you mean by "expensive"? Regarding the speed of the application or the time to implement the app.

My opinion:
Implementing the app using the low-level TCP/IP (or UDP, depends on the app) protocol will result in fast communication between client and server, because web services are on a much higher level (ISO/OSI) using protocols like HTTP etc. Also you need an IIS to host the service etc. This will all slow down the app. But going this way will need you to invest time, because you have to implement all the stuff like opening sockets, handling server communication etc.

Hope this helps you a bit.

Regards
Sebastian

It's not a bug, it's a feature!

Me in Softwareland.

Link ArrayList to datagridview and display spesific data

Ronenb13-Jan-09 20:51

Ronenb

13-Jan-09 20:51

Hi I would like to link ArrayList as datasource to datagridview

I’ve defined the
ArrayList arrList;
arrList = new ArrayList();
//Add data to list
arrList.Add(node_1);
...
arrList.Add(node_n);

dataGridView1.DataSource = arrList;
Adding the link is OK, the problem is that I see all the members of nodes in datagridview and I wish to see only specific members in the grid.
I try to manually add columns to grid and it didn’t help, I see all members of node in datagridview

Please advice
Thanks
Ronen

Re: Link ArrayList to datagridview and display spesific data

musefan13-Jan-09 23:54

musefan

13-Jan-09 23:54

maybe you should forget the datasource option and update the grid view as required by looping through the array list. That way you can display what ever you want how you want, much more control that way Smile | :)

Re: Link ArrayList to datagridview and display spesific data

Reza Raad14-Jan-09 0:41

Reza Raad

14-Jan-09 0:41

See this is my code same as you want , this works for me correctly:

<br />
        grdRequests.Columns.Clear();<br />
<br />
<br />
        loanRequests = //get your array list here<br />
        grdRequests.DataSource = loanRequests;<br />
        grdRequests.DataKeyNames = new string[] { "ID" };<br />
<br />
<br />
<br />
        CommandField SelectField = new CommandField();<br />
        SelectField.SelectText = "field1";<br />
        SelectField.ShowSelectButton = true;<br />
        grdRequests.Columns.Add(SelectField);<br />
        <br />
        <br />
        BoundField IDField = new BoundField();<br />
        IDField.DataField = "ID";<br />
        IDField.HeaderText = "field2";<br />
        grdRequests.Columns.Add(IDField);<br />
<br />
...<br />
<br />
<br />
        grdRequests.DataBind();<br />

Human knowledge belongs to the world

Re: Link ArrayList to datagridview and display spesific data

Henry Minute14-Jan-09 2:16

Henry Minute

14-Jan-09 2:16

The DataGridView will automatically show ALL public properties of your Node class.

So you could do as musefan has suggested, or a possible alternative is to create a new class 'GriddableNode' which holds only the properties you wish to display, then create a list of some sort to use as the datasource for the DataGridView. OR you could edit the columns of the DataGridView, use the SmartTag for the gridview in the designer.

Henry Minute

If you open a can of worms, any viable solution *MUST* involve a larger can.

xml carriage return

arkiboys13-Jan-09 20:50

13-Jan-09 20:50

I am passing the data of an element inside an xml file into a sql server table with field varchar(max). This datatype is permanent and due to business rule is not allowed to be changed.

The xml file contains something like:
i.e.

<file>
<data>

-----1234------

This is the value for the first item...
</data>
<data>

-----9876------

This is the value for the second item...
</data>
</file>

Notice, there are spaces and carriage returns.
When pulling these data out of the xml file, in the immediate window, I can see "\r\n\r\n" attached to the text where there should be a return.

Problem:
The sql does not take care of these returns, so that when I show these values on the UI, I do not see the carriage returns.

Question:
How do I see the text on the UI as it exacly appears in the xml file ?

Thanks

Eddy Vluggen13-Jan-09 21:07

Eddy Vluggen

13-Jan-09 21:07

Make it CDATA Smile | :)

I are troll Smile | :)

arkiboys13-Jan-09 21:24

13-Jan-09 21:24

indeed it has ![CDATA[]] in there already with the data inside []

Eddy Vluggen13-Jan-09 21:30

Eddy Vluggen

13-Jan-09 21:30

In that case I;m obvious not awake, So I'll shut up further and go for a nice cup of black, hot coffee Cool | :cool:

I are troll Smile | :)

J4amieC13-Jan-09 22:25

J4amieC

13-Jan-09 22:25

UI is what? Web or Windows? If its Web then you need to convert spaces to   and returns to <br/>

arkiboys13-Jan-09 22:35

13-Jan-09 22:35

UI is a third party web front end which I do not have access to the code.
So the only option seems to be when I am placing the xml data into the sql server table.
The xml data in the xml file has carriage return and liine feeds.
In the immediate window (c# app which I use to upload the xml data), I can see \r\n in the text but these signs are not imported into the table field which is of type varchar(max).
Thanks

J4amieC13-Jan-09 22:53

J4amieC

13-Jan-09 22:53

arkiboys wrote:
I can see \r\n in the text but these signs are not imported into the table field which is of type varchar(max).

Yes they are, its just you dont see them as \r\n - they're non-printing characters so they dont display in the database - but I assure you they're there.

You have 2 options

1) Make the replacement when uploading the data
2) Make the replacement when retrieving data

take your pick.

arkiboys13-Jan-09 23:04

13-Jan-09 23:04

In immedia window:

"---- 2008 ----\r\n\r\nsome text here"

In output window:
---- 2008 ----

some text here

in sql server table:
---- 2008 ---- some text here

J4amieC13-Jan-09 23:37

J4amieC

13-Jan-09 23:37

Was that supposed to tell me something?

arkiboys13-Jan-09 23:41