C# Discussion Boards - CodeProject

How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

8-Jan-04 3:57

Right, and there doesn't appear to be any examples you can use. There is one commercial ASP.NET emailing package that uses it but they didn't give any details.

Hence the RFC link - it isn't hard to do, so you should be able to figure it out. Mostly, it's just replacing certain characters with their hexidecimal equivalents prefixed by an equal sign. Use a StringBuilder for optimal performance.

Replace the characters as necessary and break the lines into 76 character sequences taking into account whether tabs or spaces must follow on the next line.

There was only one example in C# I could find, and if my German is any good, it seems to have problems in a couple cases. I tried tranlating the page, but apparently it was pretty bad grammar to start off with and the translation didn't do very well: http://www.mail-archive.com/csharp.net@glengamoi.com/msg00571.html[^].

-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----

sxbyl7-Jan-04 17:14

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

7-Jan-04 17:14

If I host the SingleCall SAOs in IIS, I can use HttpContext.Current to get
current HttpContext in the calling method, so I can get some useful
information. But if I host the remote objects in a console application for
debug, HttpContext.Current is a null object. Can I get some object likes
HttpContext when I do not host the objects in IIS in the calling method? I’
d not like to use CallContext cross Internet.

Best Regards!

Heath Stewart7-Jan-04 18:48

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

7-Jan-04 18:48

HttpContext has no context outside of ASP.NET. It is tightly coupled, therefore not usable outside the context of ASP.NET.

You might consider designing your SAO to be a little more abstract and leave the details of what is required (say, a response Stream) to the host.

sxbyl7-Jan-04 19:00

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

7-Jan-04 19:00

Thank for your comment.

I only need some way to distinguish clients in my SingleCall objects, but I'd not like to pass the client id in all class methods, or to pass the id in CallContext.

Heath Stewart7-Jan-04 19:03

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

7-Jan-04 19:03

Define "client ID". We use a lot of remoting in our application and deal with lots of stuff like that. I just need to understand your circumstances. Is it unique to a machine (perhaps an IP address)? A user identity? A client application version or client name (like a user agent for browsers)?

sxbyl7-Jan-04 19:18

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

7-Jan-04 19:18

In my software, I only need to distinguish sessions in the method calls. So I can generate a GUID in the client. But how can I passed to the server in SingleCall objects?

Heath Stewart8-Jan-04 3:44

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

8-Jan-04 3:44

Well, there's always the CallContext, which you said you didn't want to use but this is a good purpose for it. What's wrong with it? It's just another part of the remoting infrastructure. Both creating your own RealProxy and adding a channel sink could possibly do this, but it's a lot more work and not easily accessible to the SAO itself, since creating your own proxy is more for modifying the params, returns, etc. of a message, and channel sinks are for manipulating the message typically without modifying the content (like compression, encryption, routing, etc.).

sxbyl8-Jan-04 14:06

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

8-Jan-04 14:06

Very thanks! I don't want to use CallContext only because it will transmit all CallContext object content in both call and return, and it will use some network bandwidth.

Heath Stewart8-Jan-04 16:44

Re: How can I get some objects like HttpContext when using SingleCall SAOS and does not host in IIS (with HttpChannel)

8-Jan-04 16:44

The other methods I mentioned will be much harder to use. Frankly, the serialized ILogicalThreadAffinative implementation doesn't have to take much room if you just encapsulate basic Types like a String or a Guid. The channel sinks could take even more bandwidth than a CallContext if you're not mindful of the implementation. Besides, setting and getting objects from a CallContext is a heck of a lot easier than dealing with channel sinks. Once you read about them (again, that ".NET Remoting" book is good and gets in to that), I'm sure you'll agree! Smile | :)

Oh, and if you use CallContext.FreeNamedDataSlot in the server method with the name you used in the CallContext.SetData call on the client, there shouldn't be anything serialized and sent back in the return message. This could save you bandwidth easily.

sxbyl8-Jan-04 16:55

8-Jan-04 16:55

Yes, you are right, and I also think CallContext is the better way in my solution, if HttpContext is invalid.

And thank you again for your help Smile | :)

HttpWebRequest

murali_utr7-Jan-04 17:04

murali_utr

7-Jan-04 17:04

hi,
i need to send web request to server.but i need to send request from using universal proxie servers. any one help to me. thanks in advance.

Murali.M

Re: HttpWebRequest

Heath Stewart7-Jan-04 18:41

7-Jan-04 18:41

You mean send a request through a proxy? See the HttpWebRequest.Proxy property. There already is a WebProxy class that lets you specify the host, port, a list of addresses that don't require the proxy, and user credentials if logins are required. If this isn't sufficient, you'll notice that the HttpWebRequest.Proxy property is of type IWebProxy, you can implement that interface and make your own proxy. Set the proxy instance and call HttpWebRequest.GetResponse (inherited from WebRequest, so you'll have to cast the return to an HttpWebResponse for HTTP-specific properties).

Re: HttpWebRequest

murali_utr7-Jan-04 19:11

murali_utr

7-Jan-04 19:11

Hi,
thanks for ur help.

Have A Nice Day!

C# Forms/Controls

Luther Baker7-Jan-04 14:24

7-Jan-04 14:24

I wish to use the Dock property, but I need a 10 pixel inset on all 4 sides.

Let's say I am creating a simple editor. I place a TextBox control on a Form, but I'd like 10 pixel insets on every side of the TextBox.

One way:

Add a panel to the form, position the panel with 10 pixel insets on all 4 sides, and Anchor to all 4 sides. Then, attach the (Dock=Fill) TextBox to the panel panel.

Is there any way to do this without using a Panel like this?

I realize that if all I was creating was a text editor, then I could just Anchor the text box to all side of the form, and position the text box correctly, but, my real application is a bit more complicated. There are several controls inside the form - including a splitter. So, I can't really use Anchor for every case.

The crux of the problem is that when using the Dock property, the child control is docked right up against the edge of its parent. I was wondering if there was a property that could buffer or inset that child control.

I'd like to avoid having to add a Panel to my application everytime I want to position something just the way I like it - while using the Dock property. How about a thick transparent border?

FormBorderStyle will not work. I am working inside the form.

I'd also like to do this same thing for controls inside the form attached to parent Panels. I see that Panel can have a BorderStyle. Is there a way I can somehow customize the actual border?

I google "custom borders in C#" or something.

Thanks,

-Luther

Heath Stewart7-Jan-04 18:38

7-Jan-04 18:38

As for the docking, you could use panels, which derive from ScrollableControl which has a DockPadding property. Dock you panels, set the padding, and you can dock or anchor your controls inside those.

In regard to drawing a border, you can use simple owner-drawing by overriding OnPaint and drawing a rectangle (see the ControlPaint class for some handy helper methods), or go so far as to override WndProc and do it a little lower-level. I'd recommend the managed way for portability and ease, though!

Luther Baker7-Jan-04 19:37

7-Jan-04 19:37

wow.

David Stone7-Jan-04 20:31

David Stone

7-Jan-04 20:31

lutherbaker wrote:
wow.

Heh, I think that's what we all say to Heath's posts... Wink | ;)

When I can talk about 64 bit processors and attract girls with my computer not my car, I'll come out of the closet. Until that time...I'm like "What's the ENTER key?"
-Hockey on being a geek

Luther Baker7-Jan-04 20:28

7-Jan-04 20:28

The first method works, and provides my insets.

But regarding option #2, the point of the border was to "pad" the form. I do in fact, get the border to draw, but the child controls still Dock against the edges of the form, overlapping even the border I am drawing.

Should I somehow affect the Form.ClientRectangle {get;} before forwarding to base.OnPaint () so that the border I've drawn is not overlapped by child controls? Or shall I work it out by attaching child controls to a singular, centered child Panel again?

Also - what is the Form.ClipRectangle represent? The area that needs repainting? In my little app, its always 0,0,0,0. Shouldn't it be equal to the Form.ClientRectangle? It is 0,0,0,0 every time OnPaint gets called. Even when the app is completely hidden by other windows - and then pulled to the front.

Regardless, thats just neat stuff.

Thanks,

-Luther

Heath Stewart8-Jan-04 4:18

8-Jan-04 4:18

You mean the PaintEventArgs.ClipRectangle? The clipping region is the area that has been invalidated and needs repainting, yes. This will not affect the controls themselves, however (as you've noticed). In order to do that, you have to position the child controls. Changing this clipping region will have no affect, other than perhaps not painting all the invalidated regions.

As far as it being straight zeros all the time, this doesn't seem right. Try overlapping it party with another window, or opening a dialog on your app and see if the clipping region is something else. I've done quite a bit of this and have never seen an "empty" rectangle. My other suspision is that - since the default value for numeric types of which Rectangle is made is 0, that you might have some bug in your code (no offense - just meant as another possibility).

On a side note, clipping regions are often used to make non-rectangular dialogs, like Windows Media Player, RealOne, etc. Windows Layers are a better alternative but is only supported in Win2K and up and isn't as easy to program (though better in the long-run).

C# SystemFonts

Luther Baker7-Jan-04 13:49

7-Jan-04 13:49

Hi,

SystemColors provides access to user specified system colors.

Is there such a class for user specified system fonts? IE: Message Box? Menu, Selected Items, Active Title Bar, Inactive Title Bar? Window Text?

Thanks,

-Luther

Re: C# SystemFonts

Heath Stewart7-Jan-04 18:30

7-Jan-04 18:30

Control.Font uses the DEFAULT_GUI_FONT, the stock object (see GetStockObject in the PSDK) for controls, menus, etc., if available. You can get the font used specifically for menus from SystemInformation.MenuFont. As far as the caption bar fonts go, there isn't any managed way to do this.

Re: C# SystemFonts

Luther Baker7-Jan-04 19:38