Image transparency when resizing [modified] - C# Discussion Boards

Re: plugin based applications in C# projects

Ravi Bhavnani30-Jun-06 9:47

Ravi Bhavnani

30-Jun-06 9:47

sawerr wrote:
I want to learn about how i can interact with native components(plugins) from C# exe(UI).

Ah. You should be able to define a C# interface that P/Invokes itself into a DLL that exposes a vanilla C API. Using a C API (vs. C++) might be a safer route to work around name mangling issues.

/ravi

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Re: plugin based applications in C# projects

sawerr30-Jun-06 9:57

sawerr

30-Jun-06 9:57

OK.
As i said i want to interact my exe both .net plugins and native plugins.So i must define my interface in two parts.One of them as you said(for native plugins).The other as the link that sent me in your first post(for .net pugin).Is this right?If something wrong please correct it.

Or are there different ways to do this?Any advice?If you know any sample codes it will be perfect for me.Because I can not find such a sample application.

Thanks.

Re: plugin based applications in C# projects

Ravi Bhavnani30-Jun-06 10:13

Ravi Bhavnani

30-Jun-06 10:13

sawerr wrote:
define my interface in two parts

It seems that would be an appropriate way to go. I would first work on defining the .NET one and getting that to work, then extend that to work with a C DLL.

/ravi

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Re: plugin based applications in C# projects

sawerr30-Jun-06 10:22

sawerr

30-Jun-06 10:22

Thanks ravi for all answer.
One more question i have.Why did yo say C DLL?I think i must force developers (that prefer to write native dll) for writing their dlls in COM.Is this wrong?Now i make a decision that:
My UI will be in C# ; plugins which will be in native format must be COM dll.Choosing com technology is wrong?

Thanks again.

Re: plugin based applications in C# projects

Ravi Bhavnani30-Jun-06 10:25

Ravi Bhavnani

30-Jun-06 10:25

Sorry, yes you could certainly expose a COM interface and P/Invoke that.

/ravi

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C# Class question

joshp121730-Jun-06 9:17

joshp1217

30-Jun-06 9:17

I may be an Idiot for asking this but it is friday and my brain is fried, lol. But in a C# Class can you just declare an Enum? Other Classes will use this single Enum as a standard across the application.

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

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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

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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.

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