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I need to check the whether the modem exists in the system how to do this in C#
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You might want to use WMI - see this[^] article. They key you probably want is Win32_POTSModem and/or Win32_NetworkAdapter.
/ravi
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hi,i'm using visual studio 2003 ( c# programming,.net 1.1)
i need check if a form in application is open or not,like application.openforms() in visual studio 2005
please help me ?
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Why don't you declare that form global and check whether it is visible or not with "if (myForm2.Visible) "?
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If you need just a single instance, use static variable or singleton.
If you need multiple instances:
- if they are MDI children, use Form.MdiChildren Property[^]
- otherwise use static list and add form to the list in constructor and remove it from the list in Form.Closed Event[^]
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thank you for answer,but i have another question
for example i have 2 forms,in the first form i have a button that click this button the form2 has shown
but i need while form2 is show another form of form2 does'nt show!and if form2 is minimized and show when i click button windows sate of form2 was normal!
please help me ?
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Hi i am inheriting two interfaces A, B which has a method with common name called codeproject. When i am trying to call that method which interface method does it call? or how can we call a patricular method.
interface A
{
public void codeproject();
}
interface B
{
public void codeproject();
}
public class code : A, B
{
}
code c = new code();
c.codeproject() // which method is it calling ? what do i need to do call a particular method?
Santhapur
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neither as the codeproject method is implemented in the class, not the interface.
you can implement each interface explicitly if you wish by using
public class code : A, B
{
void A.codeproject()
{
}
void B.codeproject()
{
}
}
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)Expect everything to be hard and then enjoy the things that come easy. (code-frog)
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what if we call like
code c = new code();
c.Codeproject(); which one does it call?
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I think you are misunderstanding interfaces. An interface has no implementation.
c.CodeProject simply calls the method CodeProject() in the class code - nothing is ever 'called' in an interface.
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)Expect everything to be hard and then enjoy the things that come easy. (code-frog)
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Ok Thanks I got you..
Santhapur
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Try this and see if the previous answer makes any more sense:
using System;
interface IA
{
<code>
void CodeProject();
}
interface IB
{
<code>
void CodeProject();
}
public class Code : IA, IB
{
<code>
public void CodeProject()
{
Console.WriteLine("This is the CodeProject() method.");
}
}
class Program
{
static void Main(string[] args)
{
Code c = new Code();
c.CodeProject();
}
}
A couple of quick notes:
Interfaces are named with a leading letter "I", by convention (for example, IDisposable).
Methods defined in interfaces are automatically public. You cannot use the public modifier in the interface/method definition.
Enjoy,
Robert C. Cartaino
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Oops, too slow. Already answered...
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Hi all. Is it that i am using VS .Net 2003 that there is no method to clear a list box once it is populated. I need to clear the list Box but every time i attempt using the method Clear() from Class ListControls, i get an error. please help.
Wamuti: Any man can be an island, but islands to need water around them!
Edmund Burke: No one could make a greater mistake than he who did nothing because he could do only a little.
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Hi Wamuti,
Try using the following line of code if it is a Bound ListBox:
<br />
this.listBox1.DataSource = null;<br />
For Unbound ListBox:
<br />
this.listBox1.Items.Clear()<br />
I hope this would be helpful.
John Adams
ComponentOne LLC.
www.componentone.com
modified on Thursday, September 4, 2008 10:33 AM
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I will get back since im abit far from my codes.
Thanx alot.
Wamuti: Any man can be an island, but islands to need water around them!
Edmund Burke: No one could make a greater mistake than he who did nothing because he could do only a little.
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What is the difference between;
Convert.Int32(myVariable)
Int32.Parse(myVariable)
(int)myVariable
Best Regards...
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The former invokes a specific overload of the latter.
/ravi
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Convert.ToInt32 will attempt to convert any type so long as a converter exists.
Int32.Parse will only attempt to convert a string.
(int) is an explicit cast - so long as the myVariable class/struct has an explicit(or implicit) operator that returns an int then it will be converted (by the class/struct that myVariable is an instance of - not by Int32)
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)Expect everything to be hard and then enjoy the things that come easy. (code-frog)
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dataminers wrote: Convert.Int32(myVariable)
That will do different things depending on the type of myVariable. If it's a string, it will be parsed. If it's numeric (byte, short, float, double, et.c) it will be converted.
dataminers wrote: Int32.Parse(myVariable)
Only accepts a string, and tries to parse it into an int.
dataminers wrote: (int)myVariable
That depends on the type of myVariable. If it's an object reference pointing to a boxed int it will be unboxed. If it's numeric it will be converted.
Despite everything, the person most likely to be fooling you next is yourself.
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Hi there
I'm currently building a simple downloader application. I need to provide Pause/Resume facility to the application. How can I do that?
(I use WebClient control) and the method DownloadFileAsync()
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See this[^] article for an FTP analog of what you want to do.
/ravi
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I have a WinForm app that needs to send data to, and retrieve data from a Web Service. Right now, it's done in the clear, but we want the data sent back and forth to be encrypted. I've suggested using HTTPS/SSL, but I'm not sure what to google for. Any help would be appreciated.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997 ----- "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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What about encrypting the SOAP Message...
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.
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