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If i have a FileSteam and open a BinaryReader on it the FileStream is Closed/Disposed when I close the Binaryreader - does it work the other way around? Does calling Close on the FileStream call Close/Dispose on the BinaryReader?
Rugby League: The Greatest Game Of All.
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PaleyX wrote:
Does calling Close on the FileStream call Close/Dispose on the BinaryReader?
No, you should not do that. Internally, the BinaryReader uses a reference to the FileStream instance. Because the BinaryReader implements IDisposable, you can wrap the BinaryReader in a using statement so try/finally blocks are emited and the BinaryReader is cast to an IDisposable and the Dispose() method is called.
- Nick Parker
My Blog | My Articles
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i am student ,and i want to work on some telephony application
i know that the perfect subject is TAPI ,but there are some questions :-
1- can i use the TAPI in c# language ?
2- should i install some files or dll files that help to execute TAPI functionallity ?
3-couild i have an example in c# that shows me how exactly work with TAPI in c#?
finally ,forgive me for my bad english?
 >
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Wail A.Salem wrote:
can i use the TAPI in c# language ?
Yes, but you will have to P/Invoke your method calls because they are native. If you are unfamiliar with this process you can find more information here[^]. Take a look at the TAPI.H file to see what's available to you.
- Nick Parker
My Blog | My Articles
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Nick Parker wrote:
Yes, but you will have to P/Invoke your method calls because they are native. If you are unfamiliar with this process you can find more information here
[edit]
Probably better to make use of the work already done by Helen Warn[^]
Its a good lesson in Interop too.
Michael
CP Blog [^]
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Michael P Butler wrote:
Probably better to make use of the work already done by Helen Warn[^]
I would agree that it would be extremely practical (in the business sense) to use the project Helen Warn has put together, however I took into consideration that he was a student and learning the process behind P/Invoke would be helpful in the long run.
- Nick Parker
My Blog | My Articles
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Nick Parker wrote:
however I took into consideration that he was a student and learning the process behind P/Invoke would be helpful in the long run.
Certainly. However, speaking from experience. TAPI can be hard enough to get to work, without having the extra overhead of learning P/Invoke too.
Michael
CP Blog [^]
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Wail A.Salem wrote:
can i use the TAPI in c# language ?
Yes. You can use TAPI 3 via COM interop but it isn't 100% reliable. This article[^] is supposed to be a lot more reliable. I haven't used it personally as I already have my own TAPI 2 Com wrapper.
IMO, unless you really have a good reason to use C#. TAPI is a lot easier to use in C++.
Michael
CP Blog [^]
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i want to write a rss reader program. but i'm a beginner and i dont know how to start. there're 2 problems for me now:
1. i dont know how to read .aspx files (for example http://www.gotdotnet.com/team/dbox/rss.aspx)
2. how can i display text from that file in form???
thanks!!!
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Have a read of this[^]
It should tell you all you need to know.
Michael
CP Blog [^]
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thanks...i'm trying to understand
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Konstantin_progr wrote:
i want to write a rss reader program.
I'll assume you want to use C# as your language of choice, however you need to under that RSS isn't tied to a particular file format (i.e., .aspx file extensions). Take a look at RSS 2.0 Specification[^] to understand it's format. Once you understand the structure, you can write you own class to handle this, as others have already. CP has several articles here covering such tasks, I would suggest you take a look at them: RSS Reader[^] and RSS 2.0 Framework[^]. If you have a specific question related to displaying your data, please expand on your question.
- Nick Parker
My Blog | My Articles
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Hi all,
I have a windows form listview (in details mode) that I want to essentially fill on demand. Each item is moderately expensive to load and there may be 1000's of them in some cases. So my plan: fill it with place-holders (dummy listviewitems) and then load the real items (derived from listviewitem) as the user scrolls them into view.
Now the tricky bit: no "scroll" event on the listview. A little research here at codeproject suggests the thing to do is derive from listview and overide the WndProc method and handle the WM_VSCROLL message. All good so far.
My question: how can I tell how far it has scrolled? More directly: how can I tell which items will be visible to the user?
Thanks in advance,
Bill
ps: Is there an easier way to do this that I am missing? I can't be the only person who's tried this...
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For getting scrollBar position, P/invoke GetScrollPos
[System.Runtime.InteropServices.DllImport("user32")]
public static extern int GetScrollPos(int hwnd, int nBar);
Regards,
Jay.
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How can i make it that only double clicking the textbox object will enter
to the input prompt? (text input)
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You need to add an event handler for the DoubleClick event.
textBox1.DoubleClick += new EventHandler(double_Click);
private void double_Click(object sender, EventArgs e)
{
}
- Nick Parker
My Blog | My Articles
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catching the double click doesnt help because I want prevent the prompt from
apearing inside the textbox when i single click it, do you know of a way to do that?
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One way to achieve what it looks like you're going for is to default the text box's ReadOnly property to true, and set its TabStop property to false (just a style issue - not really necessary).
Then, as the previous poster suggested, create a handler for the DoubleClick event, wherein the ReadOnly property is set to false, enabling input to be entered in the text box.
Finally, create a handler for the Leave event (or Validated or...) that sets the control's ReadOnly property back to true.
Hope this helps.
The most exciting phrase to hear in science, the one that heralds the most discoveries, is not 'Eureka!' ('I found it!') but 'That's funny...’
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Has anyone installed it alongside VS .NET 2003? Did it cause any problems?
Thanks!
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I have them both on my laptop and I am not having any problems as of yet.
- Nick Parker
My Blog | My Articles
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I also have them both on my laptop. They seem to work fine. Although I also tried them both on my desktop which they proceeded to screw up my system. Moral of this story - use Virtual PC and install beta versions inside that...
HTH
John Young
Yippee Kai Ya...
Signed Polomint.......
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I have created and consumed web services using C# and the VS2004 wizards. I would like to create an object that will consume a web service without using VS2004 Web Service Reference wizard. I have tried manipulating the files created by the wizard and have run into problems recompiling the code. The code seems to be heavily tied to the development environment.
Is there any articles available on this topic? I have searched MSDN & Google. I have only found VS2004 way of doing things.
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Michael Potter wrote:
I would like to create an object that will consume a web service without using VS2004 Web Service Reference wizard.
If you are refering to the proxy class that is generated in Visual Studio when you "Add Web Reference", you can simply run the wdsl command line tool and pass it the web address to your web service, this will automatically generate the proxy class for you. There are a slew of options that you can specify such as the language used to generate the proxy, protocol to use (SOAP, HttpGet, HttpPost), a proxy domain and so on. I would recommend you take a look at Web Services Description Language Tool[^] for more information.
- Nick Parker
My Blog | My Articles
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Thanks, that gets me a step further along.
What I am having trouble with is setting up multiple servers with the same Web Service (debug, testing, production). All that really needs to change is the URL. I would like to do this without developing 3 seperate references in my code.
#if DEBUG
private const string WS_URL = "DebugServer\TTCall.asmx"
#else
private const string WS_URL = "ProductionServer\TTCall.asmx"
#endif
I have experimented with changing the URL on the fly. It worked for awhile. After a reload of VS it began to bitch that things were not in order. Any one have a better way of dealing with this issue?
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