Converting a Form to a Windows Service - C# Discussion Boards

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Re: Thread, WaitSleepJoin

Luc Pattyn24-Jul-07 11:54

Luc Pattyn

24-Jul-07 11:54

Thanks.
And quite right.

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

DataSource binding problem

~~~Johnny~~~21-Jul-07 3:27

~~~Johnny~~~

21-Jul-07 3:27

Hi,
I have a problem binding a DataSource object to multiple TextBoxes on the same form. It seems that the TextBox object is not dynamic, it doesn't change its Text value if the datasource changes.

So I did a small experiment to prove this. In a form I initialize three controls and a Members object(derived from a DataSet): Note also that mem[0] returns a DataTable.

Members mem = new Members();
mem.ReadRange(1004, 1004);

binding = new BindingSource(mem[0], null);

textBox1.DataBindings.Add("Text", binding, "FirstName");
textBox2.DataBindings.Add("Text", binding, "FirstName");
dataGridView1.DataSource = mem[0];

Here if I type data in the TextBox1, the datagrid reacts and shows me the modified data on Leave, but TextBox2 doesn't react.
Same reaction for TextBox2.
If I modify data in the DataGrid's column, none of the Textboxes react until BindingSource.Position changes.

So I need a way to make the two text boxes to look at the state of the BindingSource adn detect any changes and react to it

I tried also to detect events on BindingSource and BindingSource.CurrencyManager and nothig fires when leaving one of the TextBoxes.

Really Confused | :confused:

Re: DataSource binding problem

~~~Johnny~~~21-Jul-07 5:01

~~~Johnny~~~

21-Jul-07 5:01

Replying to myself but any better suggestions are welcomed

I used the .Leave event on the TextBoxes to force a BindinSource.EdnEdit();

But now I have to manipulate every control individually.

Is there a better wayto do this ?

Thanks in advance for any input Big Grin | :-D

Re: DataSource binding problem

Urs Enzler22-Jul-07 6:24

Urs Enzler

22-Jul-07 6:24

I didn't comprehend your sample completly but some basics about binding:

- values in bound controls get updated when
+ BindingSource.ResetCurrentItem is called
+ a PropertyChanged event on the bound object is fired (see INotifyPropertyChanged)

- Leave on TextBox does not lead to a BindingSource.EndEdit, but EndEdit will cause validation on the control without losing focus.

And as a last thought: binding is a pain when you have to program UIs with controls that depend on each other - I's suggest using a variation of the MVP (mode view presenter) pattern (Presenter First or Passive View are my personal favourites Wink | ;-)

)

Hope this helps a bit!

-^-^-^-^-^-
no risk no funk

Re: DataSource binding problem

~~~Johnny~~~23-Jul-07 6:03

~~~Johnny~~~

23-Jul-07 6:03

Your Model View Presenter interested me, I have no intention on implementing this for my current project but I will definitely look into this for the future.

I didn't find a lot of literature on the subject, it would be of everybody's interest if you had reading suggestion (specifically a good book) on the subject of MVP model.

Thanks a lot for your input

Re: DataSource binding problem

Urs Enzler29-Jul-07 21:40

Urs Enzler

29-Jul-07 21:40

Unfortunately, there isn't too much in the internet about this topic. Either it's very abstract and difficult to transform in real world applications or it's a very simple description of MVP that lacks any information about all the surroundings.
There are also quite a few different approaches (classic MVP, Presenter First, Passive View, ...).

Therefore, I can't point you to a good article about MVP.

Maybe I should write one on my own Smile | :)

-^-^-^-^-^-
no risk no funk

add header and footer to a dynamically generated word

Nitin Varambally21-Jul-07 3:23

Nitin Varambally

21-Jul-07 3:23

Can anyone tell me how to add header and footer to a dynamically generated word document using .net 2.0 ? I am able to generate the word document but i am unable to add/make visible the headers and footers in the document. I want page numbers to be coming up in the footers and some text in the ... I am using ASP.NET C#...

Nitin Kumar V , .NET Developer

Converting a Form to a Windows Service

Ben297521-Jul-07 2:35

Ben2975

21-Jul-07 2:35

I have been looking around and can not find what I am looking for. Thanks in advance for any help.

What I have is a very nice working form that does everything that I need, including handling WndProc messages. The problem is in converting this into a Windows Service.

I specifically designed it as a form for easier testing and because the documentation suggests that I will need a Form in my Windows service to handle WndProc events anyway.

Multiple inheritance would be fantastic, but doesn't exist for C#. I have tried multiple Interface inheritance but then I can not override the WndProc method.

If anyone knows how to add a form to a Windows Service to handle WndProc messages - or knows of any other way to enable WndProc overriding from within a Windows Service I would very much like to hear from you.

Regards,
Ben

Re: Converting a Form to a Windows Service

Luc Pattyn21-Jul-07 3:09

Luc Pattyn

21-Jul-07 3:09

Hi,

I have not done this before, but here is what I would try:

create an extra thread, and let it basically do what your current Main() method does,
i.e. creating a Form, and calling Application.Run()
Run() executes a message pump, which is one thing you need. There are some overloads for it,
the default one shows the form; you probably dont want that.

I trust a form, even if invisible, gets Windows messages, hence your overriden
WndProc could work as before.

There may be a problem the service not willing to create Controls (and Forms), lacking
a user. As I said, I never did it.

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Any one know how to insert new rows into DataGrid [modified]

michaelqog21-Jul-07 1:51

michaelqog

21-Jul-07 1:51

please help me
I want to insert new rows into the DataGrid for WindowsCE4.2 Application using c#2003

-- modified at 6:06 Sunday 22nd July, 2007

how to generate a crystal report everyday at a particular time with windows services in .net

raj_no_of_doubts21-Jul-07 0:34

raj_no_of_doubts

21-Jul-07 0:34

i developed windows service which generates crystal report and it is converted to pdf and also a mail was sent.
But my doubt is i want to generate this report evry day at 8:00pm...can anybody help me..give me the logic or any links

rajesh m

TreeView/TabControl question

EliBaskin20-Jul-07 23:54

EliBaskin

20-Jul-07 23:54

Hello,

I know there is a TabControl that allows you to click on tabs and each tab associated with a box, with different content.

Is there a way to do the same with TreeView? IE, what I need is a TabControl, but instead of showing tabs, it will be controlled by TreeView.

Hope I made myself clear...

- Eli Baskin.

Re: TreeView/TabControl question

Larantz21-Jul-07 9:15

Larantz

21-Jul-07 9:15

It's possible but requires some more work.
You could for instance create a form with a tablelayoutpanel with two columns and 1 row.
In the left cell you add a treeview and you leave the righthand cell empty.
Then go to your solution and rightclick to 'Add->New Item', and select 'Custom Control'. Add one control for each of the "pages" you want to view for each of the nodes in the treeview.
Then add content to the various custom controls according to what you want on your "pages".
Create an instance of each of the custom controls in your forms constructor, and when you start adding the treeview nodes, you can add one of the custom control instances to each node.Tag property and a name for the "page" to the Text property of the node.

Finally in the treeviews node clicked event, you retrieve the node.Tag property, cast it to a usercontrol and add it to the tablelayoutpanel in the righthand cell.

-Larantz-

for those about to code, we salute you
http://www.tellus-software.com

Re: TreeView/TabControl question

EliBaskin21-Jul-07 12:37

EliBaskin

21-Jul-07 12:37

A bit too complicated for me, I am pretty novice in C#. My previous experiences were C, Delphi and LPC...

Do you know if there is a ready component that can do it?

change currentrow in datagridview

amir hooshang20-Jul-07 23:04

amir hooshang

20-Jul-07 23:04

hi
how can i change the currentrow in a datagridview.
some of rows in my datagrid is readonly and i want to jump to the next(or per) row to alow user to enter data.
the currentrow is readonly .
i used the currentcell but .....
please F1 me D'Oh! | :doh:

thanX

Highlight the records in grid

Tyng20-Jul-07 22:55

Tyng

20-Jul-07 22:55

I am working on ASP.NET. I would like to know how to highlight the row of records with colour in grid upon the page is loaded. My grid binds to a data source that run a stored procedure. The result of the stored procedure shows the current and previous records. Therefore, my user would like to know which row has been updated to the current value. Using the colour would identified the differences in the grid.

Please help.

Looking forward from your response.

Thank you.

Tyng

Message Queue Manipulation

M. J. Jaya Chitra20-Jul-07 21:02

M. J. Jaya Chitra

20-Jul-07 21:02

I have added some of the messages to my message queue yesterday but now i tried to iterate it now but no messages are there in the message queue can anybody tell me why and give me a suggestion to maintain all the messages in the message queue even though i restart my system.

Best Regards,
M. J. Jaya Chitra

Re: Message Queue Manipulation

Guffa21-Jul-07 1:12

Guffa

21-Jul-07 1:12

What message queue are you talking about? Why would you expect any messages to remain in the queue, and not being delivered?

---
single minded; short sighted; long gone;

Re: Message Queue Manipulation

M. J. Jaya Chitra22-Jul-07 18:16

M. J. Jaya Chitra

22-Jul-07 18:16

i am going to have two services one will be queeing and the other service will be started according to the interest of the user on that time the second service has to manipulate the messages in the queue. Even though the system restarts also i want the messages it should not be deleted. What about the transactional messages if i am creating it will it remain in the queue?

Best Regards,
M. J. Jaya Chitra

AddRemoveProgramsIcon in Setup Project

stancrm20-Jul-07 20:59

stancrm

20-Jul-07 20:59

Hello...

I use AddRemoveProgramsIcon Property in Setup Project. I create an icon 16x16 with 16color.
It works only in Win XP, but not in Win 2000.

Has anybody also the same problem ?

mdi parent problem

monuSaini20-Jul-07 20:55

monuSaini

20-Jul-07 20:55

Hello Friends,

I had an login form and an mdi parent form.

On the load event of mdiparent form I had called the login form as showDialog

If user cancel the login form then the mdi parent form should also be closed. but i am not able to do so.

I had tried to close it by making object of the mdiparent form but no use.

Only login form is closed not the mdiparent form.

closing of form is on the click event of cancel button in login form.

Please help,

Regards,

rahul saini

Re: mdi parent problem

~~~Johnny~~~21-Jul-07 3:34

~~~Johnny~~~

21-Jul-07 3:34

Something like

DialogResult result = LoginForm.Dialog
If (result == DialogResult.Cancel) this.Close();(or Application.Exit();)
else ....

Re: mdi parent problem

Larantz21-Jul-07 9:28

Larantz

21-Jul-07 9:28

Have you done anyting according to this:

DialogResult result = loginForm.ShowDialog();
if(result == DialogResult.Ok)
{
   //code for checking credentials or what ever...
}
else if(result == DialogResult.Cancel)
{
   //User cancelled login. Close MDI parent.
   this.Close();
}

or else you might try in loginforms cancel button clicked event:

public void buttonCancel_OnClicked(object sender, EventArgs e)
{
   (this.Parent as Form).Close();  //Not sure if you can close parent from child.
   this.Close();
}

-Larantz

for those about to code, we salute you
http://www.tellus-software.com

Re: Treeview Problem

mangrovecm20-Jul-07 19:27

mangrovecm

20-Jul-07 19:27

hi Avadhesh,
So what do you want??

vtkiet05

Re: Treeview Problem

Avadhesh Kumar Maurya20-Jul-07 20:00

Avadhesh Kumar Maurya

20-Jul-07 20:00

Hi
I want the reason and solution to fix it.
Regards
Avadhesh

Last Visit: 31-Dec-99 18:00 Last Update: 20-May-24 17:10

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