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.NET Forum / Windows Forms / WinForm General / August 2006Question about MDI application
I have an MDI application with the MDI parent container has a tabcontrol on it. When I bring up any child MDI forms, it won't show up over the tabcontrol. I have tried the form.bringtofront() and that doesnt work. Short setting the controls visible property to false, I can not figure this one out. Anyone have any ideas???? MDI parent forms shouldn't have any controls like that placed on them; at most, they should have menus and toolbar controls. What are you trying to acomplish by having a tab control on the MDI parent? Andy > I have an MDI application with the MDI parent container has a > tabcontrol on it. When I bring up any child MDI forms, it won't show > up over the tabcontrol. I have tried the form.bringtofront() and that > doesnt work. Short setting the controls visible property to false, I > can not figure this one out. Anyone have any ideas???? Well, my application is basically one form with a tabcontrol on it. Each tabpage is a different "screen" if you will. The MDI children are all for the purpose of adding or editing underlying data for the database. Does it not make sense to do this??? Should I just call the forms normally???? > MDI parent forms shouldn't have any controls like that placed on them; > at most, they should have menus and toolbar controls. [quoted text clipped - 9 lines] > > doesnt work. Short setting the controls visible property to false, I > > can not figure this one out. Anyone have any ideas???? So you want the 'screens' to appear in the tabs? Can the tabs be opened / closed independantly? If you want a MDI form like VS2005, there are 3rd party controls which can do this easily. If the tabs are fixed, you should create a user control instead of a mdi child form; you can then add the control to each tab page. Andy > Well, my application is basically one form with a tabcontrol on it. > Each tabpage is a different "screen" if you will. The MDI children are [quoted text clipped - 15 lines] > > > doesnt work. Short setting the controls visible property to false, I > > > can not figure this one out. Anyone have any ideas???? All I meant by screen was that each tabpage has a different set of components on it. In retrospect, each tabpage COULD BE its own form. But instead I decided to make it simple and use a tabcontrol. My MDI child forms could pop up at about any time the user desires. I wanted to use the MDI format to prevent the user from having more than one of these forms open at a time. The Child forms are used for making changes to the database. Is it a better idea to just use a form without using parent child relations, and if so how would I prevent the user from having more than one of them open at a time? > So you want the 'screens' to appear in the tabs? Can the tabs be > opened / closed independantly? [quoted text clipped - 26 lines] > > > > doesnt work. Short setting the controls visible property to false, I > > > > can not figure this one out. Anyone have any ideas???? If you're just having different components on each tab, why do you need MDI child forms at all? Just put the controls right on the tab page. Andy > All I meant by screen was that each tabpage has a different set of > components on it. In retrospect, each tabpage COULD BE its own form. [quoted text clipped - 5 lines] > without using parent child relations, and if so how would I prevent the > user from having more than one of them open at a time? Well that is what I am already doing already. What I'm using the MDI child forms for is say there is a button on every tabpage that will result in a form being activated. i wanted to use MDI children so that only one of these forms could be shown at a time. Is there another way to prevent multiple forms from being open at the same time? > If you're just having different components on each tab, why do you need > MDI child forms at all? Just put the controls right on the tab page. [quoted text clipped - 10 lines] > > without using parent child relations, and if so how would I prevent the > > user from having more than one of them open at a time? > Well that is what I am already doing already. What I'm using the MDI > child forms for is say there is a button on every tabpage that will > result in a form being activated. i wanted to use MDI children so that > only one of these forms could be shown at a time. Is there another way > to prevent multiple forms from being open at the same time? You could do the following in the code where you are creating an instance of, lets say, Form2. Loop through the MdiChildren array, if you find an instance of that type then do something with it, else instantiate it. foreach (Form frm in MdiChildren) if (frm is Form2) { frm.BringToFront(); break; } I hope this help... MDI children forms can not cover controls of the parent form. Unfortunately I merely have to change my methodology, getting rid of parent child relations all together and using showdialog to call forms that I dont' want the user to create more than one instance of. > > Well that is what I am already doing already. What I'm using the MDI > > child forms for is say there is a button on every tabpage that will [quoted text clipped - 15 lines] > > I hope this help... Take Marcs advice; using mdi children doesn't stop as many of any particular kind of form from being displayed at all. > Well that is what I am already doing already. What I'm using the MDI > child forms for is say there is a button on every tabpage that will [quoted text clipped - 16 lines] > > > without using parent child relations, and if so how would I prevent the > > > user from having more than one of them open at a time? >Well that is what I am already doing already. What I'm using the MDI >child forms for is say there is a button on every tabpage that will [quoted text clipped - 16 lines] >> > without using parent child relations, and if so how would I prevent the >> > user from having more than one of them open at a time? Look up ShowDialog in the help files. If you only want the user to be able to access one form at a time, opening a form with ShowDialog opens it as a modal form. When a user opens a modal form they cannot access any other form until they close it. Good luck with your project, Otis Mukinfus http://www.arltex.com http://www.tomchilders.com Thank you Otis, your reply was most helpful and I will be using ShowDialog. > >Well that is what I am already doing already. What I'm using the MDI > >child forms for is say there is a button on every tabpage that will [quoted text clipped - 26 lines] > http://www.arltex.com > http://www.tomchilders.com Free MagazinesGet these publications absolutely FREE for up to 12 months. 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