Reference A Control On Parent Form From Child?
Oct 7, 2008
Using MDI in .net, how do you reference a control on a parent form from a child? Like, if on the parent I have a textbox called txtBox1, what could I do from the child form to read the contents? I've been googling unsuccessfully all day. The closest I've found is
Parent!ControlName.Property
I don't know what the ! is supposed to mean, but I get an error here: Class 'System.Windows.Forms.Control' cannot be indexed because it has no default property.
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Apr 20, 2012
I have a UserControl named DataGridViewFilterAndSorter that I built using a SplitContainer. In each Panel of the SplitContainer contains a FlowLayoutPanel and in each FlowLayoutPanel contains a LinkLabel.
I have a procedure that accepts a reference to one of the FlowLayoutPanels in the UserControl. I want to get a reference to the UserControl (DataGridViewFilterAndSorter) using the FlowLayoutPanel reference. Currently, I have to use this[code]...
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Oct 28, 2010
Here is the pertinent part of my code:
Public Class Form1
Inherits System.Windows.Forms.Form
Private Sub MenuItem3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code].....
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Mar 30, 2010
I have a datagridview control on a form that I want to make readonly, before showing the form. I can disable it before showing the form with the [code]...
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Apr 10, 2010
I would like to know if there is some simple code to release a child control from it's parent control, without having to name the parent control. In pseudocode, I'm looking for something like this:
[Code]...
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Feb 27, 2012
VB Reference parent member of a class through a child when using List Of(T)?
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Apr 10, 2011
i have created two forms A and B when button in form A is clicked B is invoked when B is running its not possible to work on A until i close form B. How can i work on A without closing B
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Apr 17, 2012
i have three forms
when i click button1 on form1=====> form2.showdialog()
then click button 1 on form2 =====> form3.showdialog
then click button 1 on form 3 =====>
[code].....
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Dec 15, 2011
I have an issue when I place a label box in the MDI Parent form and then open a child form the label box highlighted in child form?
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May 22, 2010
I am using Visual Basic .Net 2005 professional.From what I understand, I should be disposing of any object that is an unmanaged resource. I understand the best way to tell if a resource is unmanaged is if it has a Dispose method. ie: If I type a dot after my object, intellisense shows .Dispose() as one of the options. If it does, it's an unmanaged resource. Is that correct? In that case, pretty much every control is an unmanaged resource: buttons, forms, panels, etc.In the application I am working on I use an MDIparent container form, which contains MDI children forms, which themselves contain Panels, Menus, Groupboxes, etc, which in turn contain Buttons, Textboxes, Labels, Dropdowns, etc.Do I have to dispose of each button, textbox, label and dropdown within a panel before disposing of the panel?
Do I have to dispose of each panel, menu, and groupbox before disposing of the MDI child form?.Or can I just call the Dispose() method of the MDIchild form and the GarbageCollector will take care of all the controls and resources within the form?Watching the "mem usage" in Windows Task Manager seems to be an unreliable way to detect if I have a memory leak. The numbers just keep climbing and falling (mostly climbing) erratically and without any activity performed on the application. Is there some (relatively) easy way to detect leaks?
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Nov 27, 2009
I need a solution to move a child control with in the bounds of a parent control means I had a panel with 300*300 pixels and I had to move a textbox within the panel how?
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Mar 29, 2012
I try to access the MainContentBlock control from the aspx, but unable to do so. In the aspx file I have registered both controls:
[Code]...
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Mar 27, 2011
I am getting DragLeave Events when dragging from a parent to child control. I would only expect to get this event when moving outside the bounds of a control. How can I implement this?
[Code]...
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Mar 10, 2010
I have a user control and a panel on it in Dock fill format. Now this is exposed for the user to add on the form. Till this point fine. Now the user sees lot of events for the user control, which I want to actually link up with the panel on the usercontrol, because that is where I want things to happen . Is there any solution to link up the events in few lines of code than calling each event separately? I am also looking to expose only few events than all the base control events.
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Feb 18, 2011
Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.
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Jul 28, 2010
I am trying to size an MDI form to fit its 2 children perfectly within itself but when I use simple sizing it doesn't work - the MDI form always introduces scroll bars and the children seem to be too big for the parent. My three mDI form methods where this occurs is below.
Private Sub positionSyncForm()<br/>
With m_SyncManager<br/>
.Top = 0<br/>
[Code].....
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Dec 13, 2011
May I know is there any solution for both MDI parent and MDI child is MDI form?I am trying to set like this.
uiAdjustment.MDIParent = Me uiAdjustment and "Me" is both MDI form and it show error when I am trying to do like this.
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Apr 11, 2009
I have a 'property management class' that contains several functions and properties. I have several other classes that use the 'management class' as a property to derive the value of several of its other properties.Is there a way for me to reference the outer class from the 'management class' functions without having to pass it as a parameter? I ask because several different classes can have this 'management class' as a property and am having a hard time typing the parameter.
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Jun 5, 2012
i am having some trouble in my Windows form application. i have 2 forms1st Main / Parent Form2nd Sub / Child Form (Menu)
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Jan 28, 2012
It has to be a simple line of code but I do not know how to construct it. Using VB 2010 Express, I have a MDI parent form and many child forms. I want the parent form to determine what child form is active and load data into the RichTextBox1 on the child form. Each Child form has a RichTextBox1. The parent form gets its data by loading a file.
I am close to a solution but just can't get there. You will see in the code below, if I make a direct reference to a specific child form, it works great. What I want to do is to use the Active Form function to determine which form to write to. I have looked at the MS tutorial which gets me close.
Private
Sub OpenToolStripMenuItem_Click(ByVal sender
As System.Object,
[Code].....
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Nov 12, 2010
Note: I am working with Visual Studio 2010 Professional. Note: There are a lot of MDI Child posts, but none (that I have found) that apply to my scenario... Scenario I have an MDI form with a UserControl docked at the top. The UserControl is for navigation and is ~50 pixels in height. When I show a child form with its WindowState property already set to 'Maximized', the child form shows maximized in the MDI parent, but behind the UserControl.
[Code]...
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Jun 3, 2011
I have two forms. Form A and Form B. Form A has a datagrid that is populated from a SQL Database Table query. When a button is pressed Form B is launched that allows you to add a record to the database table. I need for the datagrid to be refreshed and show the newly added record when I close form B and go back to the parent.
[Code]...
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Feb 6, 2011
I have a MDI Parent form created with a MenuList, I also have the MDI child form created.ow do I go about using the MenuList to open the MDI child form within the parent form?
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Dec 3, 2009
Basically I have two forms - Form1 has a DataGrid on it (Infragistics) and in the double-click row event it creates an instance of the EditForm and passes along the UniqueId for editing. Once the user saves the changes (if they make changes) - I want the DataGrid on Form1 to refresh. Here is how I thought I could get this to work ... I create a public property called RefreshRequired as boolean. Before unloading the EditForm it sets this property to true. Then Unloads. This continues the code in Form1 (which showed the EditForm as modal) but RefreshRequired is still showing as False? Why isn't my EditForm able to set the property?
FORM 1
Private Sub grdList_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles grdList.DoubleClick
' TODO Ignore Double-Click Event when Right Mouse Button Triggers Event
[code]....
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May 1, 2009
form1 has datagridview, when I click "add new", form2 appears(details view, allowing me to add new records into datagridview on form1). when I click "add new" again, form2 appears again, if I click x times, form2 will appear x times. How do I stop the add new button and all the functions on form1 from working until form2 is closed?
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Feb 3, 2012
I have a date selector on mdi parent that updates a property when date is changed. When I open a child form, it grabs the property just fine. However if I change the date again after the child is open the date does not change on the child unless I close and reopen the form as expected. What would be the best way to automatically update all open child forms when the date is changed on the parent at anytime? running a timer to parse the date property is impractical.
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Aug 24, 2009
I have two forms....Mainform is filled with controls that are databound to a datasource.....then I have a child form that is used to edit data from parent form.......the data that is displayed on the child form uses the Filter() method of the binding source to display data only for the customer selected......
The child form has the standard OK and CANCEL buttons set up as dialog result.......after I edit the content in child form, the changes are displayed on the child form correctly......but when closing the child form and going back to the parent form the changes dont appear there unless I restart the application.....I also tried adding the tableadapter.update/fill method in the 'OK' dialog result event handler and it still doesnt work......
How can I make the changes take effect on the parent form without restarting the application?
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Jan 23, 2011
I want to load a child form which is a login form by default when the parent form is loaded.Right now when I click new file on the toolbar of the parent form, then only the login form is loaded but i want it be loaded by default without clicking anything.
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Apr 2, 2012
I have a parent form that has a list of items and each item has a unique ID. The user can open one or many of the items in a child form (it is set up in a tabbed MDI), but it can only open one instance of each item at a time.
In the parent form, I was going to make a collection (or something like that, maybe there is a better way) to keep track of which items are open in the child forms. I need to know when each child is closed so that it can be removed from the collection and reopened at a later time. I was thinking that when the child form closes, it somehow does something (like raise an event) that tells the parent form to remove the unique ID from the list of current open child forms.
My questions are, is this a good way to do this and I am pretty sure I would use the form closed event in the child form to update that parent form, but as well, I didn't know if this is the best way of handling it.
If raising the event is a good way, are some examples on how to do it out there? I found some for controls, but not while the form is closing/closed.
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May 14, 2010
How can I disable the parent form when I call a child form?This code doesn't disable the parent form like I thought it would:
frmChild.ShowDialog()
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