Re: Sorting DataGridview column programatically - C# Discussion Boards

Paul Conrad29-Jul-07 6:30

29-Jul-07 6:30

You can invoke the Dispose all you want, but the system will take out the garbage when it deems time to do so. I am sure there has to be some way to coax it along Smile | :)

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

How can i fire event from UserControl to the Dialog ?

Yanshof29-Jul-07 3:56

Yanshof

29-Jul-07 3:56

Hi ALL,

I have some dialog that hold UserControl that i wrote.
On the userControl i have some Button that when i click on him i need to Fire event to the dialog.

How do i do it ?
Does there is some method "FIRE_EVENT" that through the event?

Thanks for any help.

Re: How can i fire event from UserControl to the Dialog ?

Abisodun29-Jul-07 4:31

Abisodun

29-Jul-07 4:31

In the user control declare a delegate and event:

public event ClickHandler Click1;
public delegate void ClickHandler(EventArgs e);

In the button's click event raise the event:
i.e.
if (null != Click1)
Click1(e);

In the dialog add a handler for Click1:
myControl.Click1 += YourHandler

Re: How can i fire event from User Control to the Dialog ?

Yanshof29-Jul-07 19:52

Yanshof

29-Jul-07 19:52

But How does the dialog know about the event ?
What i need to know ( and does not understand ) is the dialog know about the existing of the click event before i create the connection between the dialog and the User Control ?
Because i need to do it in late banding and i don't want to create connection between the dialog and the User Control in the design time - i want to create this connection in run time -

Can i do it ?

Re: How can i fire event from User Control to the Dialog ? [modified]

Abisodun30-Jul-07 1:36

Abisodun

30-Jul-07 1:36

myControl.Click1 += new MyControl.ClickHandler(yourClickHandlerMethodInTheDialog);

myControl here is an instance of the user control whose class name is MyControl.

Yanshof wrote:
What i need to know ( and does not understand ) is the dialog know about the existing of the click event before i create the connection between the dialog and the User Control ?

The instance myControl only exists at run time in all cases (even if you're using the VS Designer).

-- modified at 8:33 Monday 30th July, 2007

Sorting DataGridview column programatically

Nadia Monalisa29-Jul-07 2:43

Nadia Monalisa

29-Jul-07 2:43

Hello,

In my C# Windows form, I have a datagridview which has a column name "id". Now, I want that, when the form is loaded, the gridview sort the column by descending order. I did not find any snippet to do so. Would you please help me by giving me a snippet.

Regards

Re: Sorting DataGridview column programatically

DignifiedWorld29-Jul-07 4:07

DignifiedWorld

29-Jul-07 4:07

Sort by ID in descending order while fetching data from database before you show in DataGridView.

Re: Sorting DataGridview column programatically

Nadia Monalisa29-Jul-07 5:18

Nadia Monalisa

29-Jul-07 5:18

Hi,
Thanks for your suggession. Actually I did that before, but for some other conflict in my project, I had to remove that Ordering in the database query. So, I thought, there could be some way to sort only that specific datagridview and not other gridviews in my form.

Regards.

Re: Sorting DataGridview column programatically

Edwin Syarief29-Jul-07 23:10

Edwin Syarief

29-Jul-07 23:10

Hi,

I have my way to sort DataGridView like this, but improve it by your self:

Step 1:
- I create stored procedure "sp_sort" that query is "SELECT * FROM tablename ORDER BY id DESC"

Step 2:
- On form load you type this :

<code>
SqlCommand cmd = new Sqlcommand("sp_sort", conn);
cmd.CommandType = CommandType.StoredProcedure;
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
adapter.Fill(dt);

myGridView.DataSource = dt;
</code>

Regard,

Edwin

display mdi childs as tab pages

cellardoor071629-Jul-07 2:37

cellardoor0716

29-Jul-07 2:37

I have a MainForm which is MDI parent to all other forms. I want the to display the child forms as tab pages inside the MainForm. Is it possible? Can anyone help me with this please?

cellardoor

Re: display mdi childs as tab pages

Dave Kreskowiak29-Jul-07 3:16

Dave Kreskowiak

29-Jul-07 3:16

You don't need an Mdi setup to do that. It is possible to do in tab pages, though I'm not saying it's a good idea. You will you will not get designer support for this. You have to create your forms as if they were normal, then you have to modify the forms and add them to the appropriate TabPages in your code.

There is a hidden little property of a form call TopLevel. Set this property to False, then you can add the form to any container that holds Control objects.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Special characters in enum

DignifiedWorld29-Jul-07 1:52

DignifiedWorld

29-Jul-07 1:52

Is it possible to write an enum like the code below.

public enum BloodGroup<br />
{<br />
    None = 0,<br />
    A+ = 1,<br />
    A- = 2,<br />
    B+ = 3,<br />
    B- = 4,<br />
    O+ = 5,<br />
    O- = 6,<br />
    AB+ = 7,<br />
    AB- = 8<br />
};

Manzur Ahmed

Re: Special characters in enum

Brady Kelly29-Jul-07 2:01

Brady Kelly

29-Jul-07 2:01

No. My compiler complains about the first +. What compiler are you using to have to ask this question?

Re: Special characters in enum

_Damian S_29-Jul-07 2:09

_Damian S_

29-Jul-07 2:09

What about writing the enum using APos, ANeg, BPos, BNeg etc...?????

-------------------------------------------
Don't walk in front of me, I may not follow;
Don't walk behind me, I may not lead;
Just bugger off and leave me alone!!

Re: Special characters in enum

DignifiedWorld29-Jul-07 2:12

DignifiedWorld

29-Jul-07 2:12

I used C# in Visual Studio 2005

Re: Special characters in enum

Dave Kreskowiak29-Jul-07 3:11

Dave Kreskowiak

29-Jul-07 3:11

No, it's not. You can only use the chracters legal in varible names.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: Special characters in enum

Brady Kelly29-Jul-07 3:16

Brady Kelly

29-Jul-07 3:16

Sorry about my first post, I was a bit abrupt. You probably had tried using those names, found the compiler didn't like them, and what you actually wanted to ask was how to fulfil your requirement of an enum for blood groups. The rule that prohibits those characters in names is not only applicable to enums, but to all C# identifiers.

If you need the blood group name, with the '+' or '-', you will have to use a BloodGroup class, has a property indicating the group, and another indicating the string name.

Re: Special characters in enum

Marc Clifton29-Jul-07 3:23

Marc Clifton

29-Jul-07 3:23

Brady Kelly wrote:
If you need the blood group name, with the '+' or '-', you will have to use a BloodGroup class, has a property indicating the group, and another indicating the string name.

He can also use the Description attribute. Lots of articles here on CP regarding enum description.

Marc

Thyme In The Country
Interacx
My Blog

Re: Special characters in enum

Marc Clifton29-Jul-07 3:16

Marc Clifton

29-Jul-07 3:16

No, but look at articles on Enum Description, like this one.[^] Read the comments to the article as well.

Marc

Thyme In The Country
Interacx
My Blog

Re: Special characters in enum

DignifiedWorld29-Jul-07 3:48

DignifiedWorld

29-Jul-07 3:48

Thank you all for amazing quick response. I have got my solution from your discussion and going through some articles in CP.

Steganography Lib.. ?

Software_Specialist29-Jul-07 0:49

Software_Specialist

29-Jul-07 0:49

Hiya
Is there any library available for steganography in C# for .jpeg and .mp3 carriers..???
Thanks

Re: Steganography Lib.. ?

Brady Kelly29-Jul-07 1:58

Brady Kelly

29-Jul-07 1:58

There is a wonderfully long and detailed multi-part Article here by Corinna John, and now she has aggregated code from all the articles into a framework here[^]. It doesn't cover those carriers specifically, but it's the only one I know of.

Re: Steganography Lib.. ?

Software_Specialist29-Jul-07 3:29

Software_Specialist

29-Jul-07 3:29

yeh even i know this one...But it doesnt support jpg or mp3. So its not of any use to me...
I dont think there is any library as such available for stego for .mp3 n jpg in C# ...if anybody know about such lib or has achieved this in C# then pls do let me know..
Thanks

Implemeting company newspaper

Berlus29-Jul-07 0:05

Berlus

29-Jul-07 0:05

Hello all,

Does anyone have tried, or have ideas reagrding implemeting company newspaper ?

Some website that would display the company latest projects, employee's birthday, etc ?

It would have to be maintained easily, by a simple web GUI and be updated automatically from a database.

thanks.

Re: Implemeting company newspaper

ekynox29-Jul-07 0:28

ekynox

29-Jul-07 0:28

you should look into DotNetNuke, http://www.dotnetnuke.com/

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