C# Discussion Boards - CodeProject

Re: C# Class question

Ravi Bhavnani30-Jun-06 9:33

Ravi Bhavnani

30-Jun-06 9:33

Yes, you can. For example:

public class IceCream
{
  protected IceCream()
  {
    // Protected constructor
  }
 
  public enum Flavor
  {
    Vanilla = 0,
    Chocolate,
    Strawberry,
  }
}

Client classes can then refer to objects of type IceCream.Flavor that could have a possible value of IceCream.Flavor.Vanilla.

/ravi

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Image transparency when resizing [modified]

Palooka30-Jun-06 8:46

Palooka

30-Jun-06 8:46

Hello,

I have got an problem with Painting in C#. When i resize an image, the right side will get more and more transparency.. i dont want that, but i dont know how to fix it.

A part of the code:

<br />
        protected override void OnPaint(PaintEventArgs e)<br />
        {<br />
            base.OnPaint(e);<br />
<br />
            Graphics g = e.Graphics;<br />
<br />
            // Top<br />
            g.DrawImage(Properties.Resources.WindowTopMiddle, 12, 0, this.Width - 22, 40);<br />
            g.DrawImage(Properties.Resources.WindowTopLeft, 0, 0, 12, 40);<br />
            g.DrawImage(Properties.Resources.WindowTopRight, this.Width - 12, 0, 12, 40);<br />
<br />
            // Sides<br />
            g.DrawImage(Properties.Resources.WindowLeft, 0, 40, 8, this.Height - 52);<br />
            g.DrawImage(Properties.Resources.WindowRight, this.Width - 8, 40, 8, this.Height - 52);<br />
<br />
            // Bottom<br />
            g.DrawImage(Properties.Resources.WindowBottomLeft, 0, this.Height - 12, 12, 12);<br />
            g.DrawImage(Properties.Resources.WindowBottomRight, this.Width - 12, this.Height - 12, 12, 12);<br />
            g.DrawImage(Properties.Resources.WindowBottomMiddle, 12, this.Height - 8, this.Width - 22, 8);<br />
        }<br />

You can see, some images have their normal size, and wont get the transparancy..
But the sides, top/bottom middle will.
I dont have changed any default settings, the editor I use is 'Microsoft Visual C# 2005 Express Edition'

Could you please help me?
I look forward to your reply.

- Thomas

-- modified at 15:25 Friday 30th June, 2006

Close current form and then open new form

Saamir30-Jun-06 8:18

Saamir

30-Jun-06 8:18

Hi guys!
I have a click event in one of my forms which is supposed to open another form. How can I ask it to close the current form and open the new form. Basically before I open the new form, close the old form.

Thanks for your help in advance!

sasa

Re: Close current form and then open new form

stancrm30-Jun-06 8:31

stancrm

30-Jun-06 8:31

Try this:

Form1.cs
--------------------------
Form2 form2 = new Form2();
form2.Show();
form1.Close();

Re: Close current form and then open new form

wasife30-Jun-06 20:10

wasife

30-Jun-06 20:10

SASA_1 wrote:
before I open the new form, close the old form.

n the click event handler, you could write something like this:

this.Close();
formw.Visible=true;

I guess it should work.

Regards,
Wasif Ehsan.

Re: Close current form and then open new form

Saamir1-Jul-06 17:24

Saamir

1-Jul-06 17:24

Thank you guys for your help. Neither of these worked. If i use form2.show(); and then form1 or this.close(); it closes both the forms. If I use this.close and then form2.showdialog() offcourse it closes form1 and never opens form 2. If I use form2.showdialog and then this.close then it opens form2 but form1 stays open until I close form2.

What I am trying to do is close form1 as soon as form2 opens. Please help!!!

sasa

Re: Close current form and then open new form

Andrew Lygin2-Jul-06 5:44

Andrew Lygin

2-Jul-06 5:44

If Form1 is the main form of your application then on closing it terminates the main thread. So Form2 are closed too. You should hide Form1 and close it only after Form2 is closed. Try this in your Form1:

<br />
private void ShowForm2()<br />
{<br />
    Form2 form2 = new Form2();<br />
    form2.Closed += new EventHandler(form2_Closed);<br />
    form2.Show();<br />
    Hide();<br />
}<br />
<br />
private void form2_Closed(object sender, System.EventArgs e)<br />
{<br />
    Close();<br />
}<br />

Re: Close current form and then open new form

Saamir5-Jul-06 2:46

Saamir

5-Jul-06 2:46

Thank you Alygin, I will try this, I really appreciate your help.

sasa

Data Transfer Suggestion

wasife30-Jun-06 7:07

wasife

30-Jun-06 7:07

Hi,
I want to have a little suggetion from you. I am working in a company which needs to connect to several other companies. Now we need to send data to & from other companies using public domain network like Internet. I want to know what is the best, most efficient & particularly secure way of doing it. Web Services, Sockets or any thing else. The amount of data is average i.e. not very small and not very big.

Regards,
Wasif Ehsan.

Re: Data Transfer Suggestion

Le centriste30-Jun-06 7:18

Le centriste

30-Jun-06 7:18

I don't know what kind of budget you have for this project, but this[^] would be a good solution for your needs.

I think the cost, excluding hardware, would be around 20K, including licenses for SQL Server 2005 and BizTalk 2006.

I work with this product since 3 years and I must admit I like it.

--------

"I say no to drugs, but they don't listen."
- Marilyn Manson

Re: Data Transfer Suggestion

Ravi Bhavnani30-Jun-06 7:19

Ravi Bhavnani

30-Jun-06 7:19

Imho, web services would be the way to go.

If you're unable to keep a server running at either end and don't require the transfer to be in "real time", you could (programmatically) email each other the data.

/ravi

My new year's resolution: 2048 x 1536
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Re: Data Transfer Suggestion

wasife30-Jun-06 7:25

wasife

30-Jun-06 7:25

I mean to say i want to implement that thing in my own application. I dont(can't) use any already built products like BizTalk etc. I am in process of making an application for which i needed suggestion.

Regards,
Wasif Ehsan.

Re: Data Transfer Suggestion

Ravi Bhavnani30-Jun-06 7:33

Ravi Bhavnani

30-Jun-06 7:33

I wasn't suggesting you use BizTalk.

Like I said, you could use webservices to easily establish a data transfer (and processing, if you like) conduit. If you can't keep the webservice servers running at all times, you may want to consider a non-realtime SMTP/POP solution. The latter only requires access to an email account.

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Re: Data Transfer Suggestion

Jun Du30-Jun-06 7:42

Jun Du

30-Jun-06 7:42

Tcp sockets would be my first choice, if it's just data transfer.

Best,
Jun

read only array, not read only in property grid

SomeGuyThatIsMe30-Jun-06 6:25

SomeGuyThatIsMe

30-Jun-06 6:25

Hey, i have an int[] that i need to be able to set in the code, but i also want the user to make sure the values are set right. i have a base class that every node in my flowchart uses then to hide and show specific properties i just cast the base class to an "info" class that only shows the properties that matter to that node. i do this for display purposes only the code treats everythign the same...so for this property there are getters and setters in the base class..but in the "info" class i have the property set to read only, and i've tried removing the set part of its declaration, but nothing helps. the first line(where it has the name of the property, and also says Int32[] array) is read only, but when you hit the + sign to expand the array to see what values it contains, the values arent read only. if it matters the values are id numbers that are automatically set for each node, that hte user can see but i dont want to trust them to type them in(they're set via a context menu on the link between two of em) the user just says set to 0 or 2, with 0 or 2 bieng spots in the array and the value being the id of the node that link goes to...so i need the values visible in the property grid just not editable..

sorry for the long post, but most of the time i get more questions than answers in other forums...i'm tryin to get out of that habit.

thanks for your help

Re: read only array, not read only in property grid

Dustin Metzgar30-Jun-06 6:34

Dustin Metzgar

30-Jun-06 6:34

Have you tried using the ReadOnlyAttribute[^]?

Logifusion[^]

Re: read only array, not read only in property grid

SomeGuyThatIsMe30-Jun-06 7:41

SomeGuyThatIsMe

30-Jun-06 7:41

yeah thats what makes the first line read only, but doesnt seem to affect the rest. i've also tried removing set from the property declaration but that doesnt seem to be working either.

Re: read only array, not read only in property grid

Dustin Metzgar30-Jun-06 8:12

Dustin Metzgar

30-Jun-06 8:12

Removing set won't work because while the array itself cannot be set to another array, the individual elements can be changed. What you may want to try is use a ReadOnlyCollectionBase. It may be what the properties grid needs to see to know that the elements cannot be changed.

Logifusion[^]

Re: read only array, not read only in property grid

SomeGuyThatIsMe30-Jun-06 8:32

SomeGuyThatIsMe

30-Jun-06 8:32

how would i cast the int[] or arraylist or anything to the ReadOnlyCollectionBase for just the properties grid..i still need to edit the values..i just cant let the user change them via the property grid.

Re: read only array, not read only in property grid

SomeGuyThatIsMe30-Jun-06 8:42

SomeGuyThatIsMe

30-Jun-06 8:42

n/m i have the desired result..i turned it into an ArrayList and used the ArrayList.ReadOnly() function to prevent changes..the only problem is that now it wants to use the collections editor instead of expanding the list like it does for arrays...if you have any ideas on how to force it to show as an array but stay read only it'd be great but if not i'll try to convince them to live with this.

Thanks for all your help

John.

Re: read only array, not read only in property grid

Dustin Metzgar30-Jun-06 9:10

Dustin Metzgar

30-Jun-06 9:10

Try sticking this on the top:

[EditorAttribute(typeof(System.ComponentModel.Design.ArrayEditor), typeof(System.Drawing.Design.UITypeEditor))]<br />
<br />

Using the EditorAttribute allows you to change the UITypeEditor being used in the properties window. When writing a control, this is how you would create your own custom editor for a particular property. From what I can see, there's a CollectionEditor and an ArrayEditor. Using an ArrayEditor may not work with an ArrayList, though. If I weren't lazy (or at work) I would actually create a project and try this out myself. Oh well, let me know if that works.

Logifusion[^]

Re: read only array, not read only in property grid

SomeGuyThatIsMe30-Jun-06 9:42

SomeGuyThatIsMe

30-Jun-06 9:42

no that didnt work with an ArrayList, tho it was a good idea...i didnt even see the ArrayEditor when i was lookin through there. I think i need to have my eyesight checked. i think they're ok with the collection editor now...but now instead of seeing the value the code needs, they want me to show the text of that node. Kind of like a SelectedText, SelectedValue deal...i was thinking of using another dimension on my array somehow. i'll try it out. btw this is really off topic but i'm taking my g/f to see a play tonite(one of her favorits) and i have a nice boquet of flowers to give her, what do you think give her the flowers at home infront of everyobdy, or take them to the restaurant to use as a centerpiece for the table, then take home from there?

thanks again.

Re: read only array, not read only in property grid

Dustin Metzgar30-Jun-06 9:57

Dustin Metzgar

30-Jun-06 9:57

Damn, oh well. You might want to try a type converter so that it shows the string representation as the text for the node.

I would say either way is going to get the same reaction, as long as she doesn't know it's coming. My gf always loves getting flowers. If you give it to her at home, she can put them in water and they'll last longer. And you won't have to carry them around everywhere. That's my vote anyways...

Logifusion[^]

Re: read only array, not read only in property grid

SomeGuyThatIsMe5-Jul-06 7:59

SomeGuyThatIsMe

5-Jul-06 7:59

I got it working, i created a class NavData which had a string and int arrays as the only members and for display i just return an arraylist created from the string array. works pretty good. Thanks for your help...she said she loved the flowers and thought it was a good idea to not carry them around all night. the only downfall was that they were fake flowers. i made some roses out of dollar bills and mixed em in with some very nice blue/purple and white silk flowers so that she wouldnt end up w/ a few dollar roses and nothing to do with em when the real flowers died.

Thanks for all your help.

John

Re: read only array, not read only in property grid

Dustin Metzgar7-Jul-06 1:43

Dustin Metzgar

7-Jul-06 1:43

I'm glad to hear that everything worked out for you.

Logifusion[^]

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