Re: creating and opening a file - C# Discussion Boards

Re: how to implement the Refresh action using C#

3-Dec-08 19:13

hello Christian Graus

can u illustrate some sample codes plz

thanks
Tony

beatles16923-Dec-08 19:38

beatles1692

3-Dec-08 19:38

Hi I think first you should define the meaning of Refresh for you application.(What)
For example, if there is a form that shows a list of customers ,Refresh might be to refill the list .If it's a data entry from you might want to refresh your look up fields that might have been changed by some other users and so on.
Then you should decide when this refresh should happen(When).
There might be a refresh button on the form or a shortcut key or when user opens a drop down.In either of these cases, you want to handle an event to do the Refresh.

For example:
We have a method called RefillCustomers that refill customers list and we want a refresh button that do the refresh.
The simplest way to make it work it's something like this:

handle button clicked event(in form load for example)

refreshButon.Click+=new EventHandler(RefreshButtonClicked);

then we should implement RefreshButtonClicked method:

private void RefreshButtonClicked(object sender,EventArgs e)
{
    RefillCustomers();
}

and then you should implement the RefillCustomers method.

Re: how to implement the Refresh action using C#

tonyjsebastian13-Dec-08 19:45

3-Dec-08 19:45

hello beatles1692

thanks for u r answer

thanks
Tony

Video Player

B873-Dec-08 18:39

B87

3-Dec-08 18:39

Hi friends,
Is it possible to create player which can play all formats of video files using c#.If so give me some suggestion to do that.

Re: Video Player

tonyjsebastian13-Dec-08 18:48

3-Dec-08 18:48

hello B87

see this link

http://www.dotnetspider.com/forum/157129-how-play-all-video-files-webform.aspx

Re: Video Player

Christian Graus3-Dec-08 18:53

3-Dec-08 18:53

Google broken where you live ?

The easy way to play video is to embed the windows media player in your app. This will play any format that WMP can play. Quick time is the obvious unsupported one, but I believe they have a control you can use, too.

Christian Graus

Driven to the arms of OSX by Vista.

[Message Deleted]

tonyjsebastian13-Dec-08 18:29

Re: creating and opening a file

3-Dec-08 18:29

[Message Deleted]

Christian Graus3-Dec-08 18:31

Re: creating and opening a file

3-Dec-08 18:31

tonyjsebastian1 wrote:
Now i want this file to be opened whenever i click on this file by openfiledialog method

You write code for this

tonyjsebastian1 wrote:
simply browsing the folder and double click this extension file .....

To do this, you write registry entries to associate your program with the file extension, and then when your app runs, you check the arguments passed in to see if there's a file path. If there is, you open it.

Christian Graus

Driven to the arms of OSX by Vista.

CodingYoshi3-Dec-08 18:34

CodingYoshi

3-Dec-08 18:34

What are you talking about--"I want it to open". Open where, File.Open or what? You mean the file should open for user then use System.Diagnostics.Process and use the start method or something like that. If you need answers, you have to put some time in asking and writing the right question.

Re: [Message Deleted]

Christian Graus3-Dec-08 18:54

creating and opening a file

3-Dec-08 18:54

There's little more annoying than people who delete their posts once they get an answer.

Christian Graus

Driven to the arms of OSX by Vista.

Re: [Message Deleted]

CodingYoshi3-Dec-08 19:03

CodingYoshi

3-Dec-08 19:03

well at least he got the answer...hopefully! I hope I wasn't rude to him.

tonyjsebastian13-Dec-08 19:11

Re: creating and opening a file

3-Dec-08 19:11

hello all,

i have created a file of extension .ct, i want this to be opened when i double click on this file how can be this done in C#

Thanks

Guffa3-Dec-08 19:42

Guffa

3-Dec-08 19:42

google "c# register file type"[^]

Despite everything, the person most likely to be fooling you next is yourself.

Installation of Crystal reports in selent mode.

ravikumar8183-Dec-08 18:11

ravikumar818

3-Dec-08 18:11

I am developing an application in .net 3.5 using this application setup i have to install crystal reports in silent mode on client machine.

Advanced Thanks

Ravikumar.

Re: Installation of Crystal reports in selent mode.

selcuks3-Dec-08 20:31

selcuks

3-Dec-08 20:31

I assume you try to say that you need to setup Run-time packages for Crystal Reports only.

Business Objects provides an .msi file for run-time packages and you can google for "msiexec" and its options to run the .msi setup files in silent mode.
You may create a batch file with correct options of msiexec.

Hope this helps.

P.S: You cannot run setup for CR Run-time packages %100 silent mode because the .msi file requests EULA acceptance to start.

Always keep the Murphy Rules in mind!

How and Why a Super class can keep the reference of its sub class

amit sahu203-Dec-08 18:01

amit sahu20

3-Dec-08 18:01

hi..
it is right, but i am conceptually confuse that how can a super class keeps the reference of its sub class..please give me basic concept for that
eg:

class A
{
............
.............
}

class B:A
{
.............
}
class C:A
{
...........
}

now

A[] aa = {new B(),new C()}
its is right and ok
but can some one help me to clear my concepts

Re: How and Why a Super class can keep the reference of its sub class

Christian Graus3-Dec-08 18:12

Re: How and Why a Super class can keep the reference of its sub class

3-Dec-08 18:12

B is an A. C is an A. B and C can see protected and public members of A. There is no reference, B IS an A. C IS an A. You can cast it to an A if you want an interface that shows only what is visible to the base class.

If you want to iterate over this collection and know which A is a B and which A is a C, you can use the is keyword.

foreach(A a in aa)
{
if (a is B)
{
// it's a B
}
else
{
C c = a as C;
if (c != null)
{
/a is a C.
}
}

}

Christian Graus

Driven to the arms of OSX by Vista.

amit sahu203-Dec-08 18:25

amit sahu20

3-Dec-08 18:25

thanx Christian
its means to use the word "reference" is wrong in that senario
and my confusion is very much cleared now

Re: How and Why a Super class can keep the reference of its sub class

Christian Graus3-Dec-08 18:31

OpenFileDialog directory path

3-Dec-08 18:31

Glad to help Smile | :)

Christian Graus

Driven to the arms of OSX by Vista.

Maddie from Dartford3-Dec-08 17:35

Maddie from Dartford

3-Dec-08 17:35

Hello,
I am using two different instances of OpenFileDialog on two separate buttons to open file dialog.

In first dialog I am setting the path according to my requirement like this
openFileDialog1.Reset();
openFileDialog1.InitialDirectory = path;

But when i click other button to open file dialog, it opens at the location where first dialog was opened. Is it possible to store the different path location for each dialog?

regards
Gajesh

CodingYoshi3-Dec-08 17:42

CodingYoshi

3-Dec-08 17:42

What are you asking? You are saying you are creating two different instances of OpenFileDialog--one for each button and when you change the initial directory for one, it is reflected in the second one? Reassure you are creating different instances because one instance should not have any affect on the other one. Post some code to clarify.

Maddie from Dartford3-Dec-08 19:10

Maddie from Dartford

3-Dec-08 19:10

Thanks,
Please find the code here
private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.ShowDialog();
openFileDialog1.Reset();
}

private void button2_Click(object sender, EventArgs e)
{
openFileDialog2.ShowDialog();
}

You will find that it always reset the path for different openFileDialog. It might be because of Reset() function.

Regards
Gajesh.

tonyjsebastian13-Dec-08 17:46

3-Dec-08 17:46

hello gajesh

use the code below to set different paths for openFileDialog
set for the openFileDialog the initial directories always...........

openFileDialog1.InitialDirectory= some path U Wish to open(store the different path location for each dialog);

thanks
Tony

Luc Pattyn3-Dec-08 17:47

Luc Pattyn

3-Dec-08 17:47

Hi,

it all depends on FileDialog.RestoreDirectory:

- by default false, meaning your app's current directory will be set to your most recent selection (hence two dialogs will influence each other)
- when true, current directory is not affected (but if you want a dialog to open where
it got closed last time, then you have to program for that explicitly).

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Fixturized forever. Confused | :confused:

tonyjsebastian13-Dec-08 18:18