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.NET Forum / .NET Framework / General / June 2005Question on Working With Forms
This should be an easy questions, but I have not had any luck with the answer. Can you load all forms in a project at once and just have the visible = False for all but one??? Then to switch between forms, all you would have to do is work with the visibility property. I have a project that has forms and I will need to switch between all of them. One is the main form and it stays loaded (And visible), but the others will load depending on the operator input. Also, I will have other forms start even more forms. For example, I will have the main form (Form1) start form2. Then form2 will start form3. When form3 closes, I need to close form2 & form3. It would be easy if I could just change the visiblity of form2 & form3. Maybe I am going about this wrong. Is there a better way? PLEASE HELP. Using VB.Net 2003 > This should be an easy questions, but I have not had any luck with the answer. > [quoted text clipped - 13 lines] > > PLEASE HELP. Stingray, When you start one form as the owner, than you can hanlde them all handle them all. (You can start from form2 a form3, however I would instance them all from the owner). Cor Ok, I think that is what I am doing. Say, from from1, Code on button1 dim form2 as new form2 dim form3 as new form3 form2.showdialog() form3.showdialog() On form2, when it closes, I run dispose() Then this will auto start form3 When form3 closes, I run dispose() This takes me back to form1. Just how I want it. This process will happen multipule times. From from1-> Form2 -> form3 back to form1. But watching the memory in task manager on this process, the memory keeps going up each time. Is dispose() the correct way to remove each form? > Stingray, > [quoted text clipped - 5 lines] > > Cor > Ok, I think that is what I am doing. > > Say, from from1, > Code on button1 dim frm2 as new form2 frm2.showdialog() frm2.dispose dim frm3 as new form3 frm3.showdialog() frm3.dispose This is a normal for modal forms, you was confusing me. If you want to hide form1 in the maintime you can even do me.visible = fals and me.visible = true (me is the instanced object from the class) > This takes me back to form1. Just how I want it. This process will happen > multipule times. From from1-> Form2 -> form3 back to form1. But watching [quoted text clipped - 3 lines] > > Is dispose() the correct way to remove each form? Dispose does not remove memory. The memory is removed by the Garbage Collector. That runs at the moment that it is efficient to run. Watching the taskmanager gives by the way only a kind of avarage result. The modal form is one of the exceptions where it is *useful* to use the dispose. I hope this helps, Cor Well, I am still getting the same results. Running the code below: dim frm2 as new form2 frm2.showdialog() frm2.dispose dim frm3 as new form3 frm3.showdialog() frm3.dispose CG.Collect() If you keep clicking the buttons.... Load Form2, close, load form3 close & Repeat the memory in the task manager keeps going up. Even if it's not that accurate, it still goes up. If you let it sit there a little while, you can see the GC kick in and lower the memory usage some but never all the way. Going from form to form like shown will happen approx 10,000 times before the app is closed. I am worried about the memory getting out of hand. Is there a better way to accomplish this same task? Main Form -> Input Form1 -> Input Form2 (Close Form1 & Form2) > > Ok, I think that is what I am doing. > > [quoted text clipped - 30 lines] > > Cor Stingray, As I said the taskmanager is not giving the correct figurs Calling GC cost you performance. I assume you know that. Have a look at a message from Willy in this newsgroup. http://groups-beta.google.com/group/microsoft.public.dotnet.general/msg/392a8e93 2c39983d?hl=en Cor Thanks for your help Cor. That was a great post by Willy. I was freeking out over nothing :-) Started to make me worry. I will be testing this in the next few days. Should be fine after reading Willy's post. :-) > Stingray, > [quoted text clipped - 7 lines] > > Cor Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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