I'm trying to make a video recording application for a project and was wondering if there was anyway to make the OpenFileDialog open up in a modeless diaglog box or would I have to make my own custom version? The reason I ask is the ShowDialog() function freezes my video. Thanks in advance for the help.
Yes, you can prevent a file dialog from blocking the UI thread, but it can be rather non-trivial depending on the details of how you want it to behave. If you're open to buying a component that does this automatically, ComponentAge offers one. Otherwise, you can roll your own by opening the dialog on a spawned thread. If you want the dialog to appear modal to the form that opened it, you'll need to do some extra work to trap the handle of the opened dialog so that you can set focus to it when the parent form is activated. An example is available at http://www.codeproject.com/KB/dialog/CustomizeFileDialog.aspx.
Related
In my project I have a MessageBox that pops up from time to time.
When I'm playing a game and the MessageBox appears, the game is minimized and I'm back to the desktop.
This might depend from app to app, but this specific app/game minimizes when MessageBox appears.
How to avoid this behavior? Is there anything I can do to the MessageBox to make it lose focus/not activated ? I tried to look at the MessageBox methods but no luck.
It sounds like you want the message box to be able to display while the rest of your code is still running. Type of messagebox you are using is modal and needs to be closed until it allows you to interact with the other open window.
I suggest you start a new thread for the message box so that the thread can continue to run allowing you to be able to interact with the other windows.
I'm currently doing a security assessment of an extremely large C# application. I have wrote a tool to help me do the assessment that also runs in C#. The entire application uses ShowDialog aka modal forms. I'm trying to come up with a way where I can still use my tool (click on it for example) while modal dialog boxes are popped up. I figure, this may require another thread or something else. If anyone has any easy tips on a way to make it so that my form doesn't get blocked by ShowDialog, that would be great.
The entire purpose in using a modal dialog is for it to block it's parent until it is dismissed.
How can I show a dialog message, similar to MessageBox, which have just the "Cancel" button and can be closed by the application.
The idea is to show the dialog while the application retrieves data from a server, allowing the user to cancel this request, and closing the dialog once the request is completed.
I recall having a very similar problem in the past. I don't think there is a dialog message "out of the box" that works like that. The way I solved this was by writing a class that modeled this sort of behavior in a window and having the application spawn an instance of the window.
The silverlight message box blocks code execution while it is open so it is not possible to close it. However you can use an XNA messagebox in Silverlight which is asynchronous
This explains its use in depth
You can probably then call EndShowMessageBox for your purposes.
if your intention is to let the user know that something is loading and that they should wait. you should use a progressbar instead.
How to: Create a Custom Indeterminate Progress Bar
I create a dialog with in .aspx. This dialog is to update something and show the progress and I want it close automatically when the update is done. So can I close the dialog from the c# code without clicking the "Ok" or "Cancel" button when something is done?
I opened this dialog using a self-made dialog class of my company. I put a "neatUpload" element into this dialog so it can upload some file from the client machine to the server. What I want to achieve is close the dialog when the uploading is done. I don't know whether it is possible or not.
Thank you
You can't shutdown a client-side script from a server-side. It's not a desktop app, web apps work differently.
EDIT:
Maybe there's a way, based on your edit... I suppose you could use ajax to notify the client after the job is done and then use javascript in the dialog to close itself.
It depends on the kind of dialog you're using, if it's a window.alert, it cannot be closed other than by clicking on the 'OK' button.
You will need a JQuery dialog or such to achieve your goal.
This question already has answers here:
Closed 13 years ago.
Possible Duplicate:
C# OpenFileDialog Non-Modal possible
I am working on a C# Windows Form project. While an open file dialog is up I am not able to select anything around it in the GUI. Is there any way to have the openfile dialog open and still be able to select other controls on the main ui?
There is no way to do this with the standard OpenFileDialog. You'd need to make your own, using a Form instead of a FileDialog as the base class. This would let you design your own version that was non-modal.
That being said, I'd recommend against this. File dialogs, in Windows, are modal by default. People expect this behavior from your application - so changing it will only lead to confusion and problems. This tends to make your application less usable and more complicated to end users, even though it often seems like a good idea.
The common dialogs are modal dialogs, which by definition do not allow interaction with any other window in the process while they are active. So the answer to your question is no, there isn't any way to do that. You would have to roll your own dialog using third party or self created controls to interact with the file system -- not a trivial task.
dban,
The OpenFileDialog class does not support the Show method which will open a form in a modeless state, that is, not locking out the parent.
As far as i know the only way to open the file dialog is like this, and it is modal. The ShowDialog method open forms as modal.
OpenFileDialog dlg = new OpenFileDialog();
dlg.ShowDialog();
You could write your own open file dialog class if you want it to be open non-modally.
But you should also consider whether this is really necessary or not. Typically when a user is presented with a file open dialog it is because the application needs a file. There is nothing else the user should be doing with the app in the mean time.