Accessing Logic Value On Parent Form?

May 12, 2010

I have a button on my form that loads a dialog. I have a logic on here that I want to test, what ever method I try I alway's get 'Object reference not set to an instance of an object'dialog1.vb:

Code:Public mainform As SettingsMainForm If mainform.LogicCheck.Checked Then textbox1.text = true End if

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Accessing MDI Parent From Child Form?

Jan 31, 2011

I am trying to access a control (statusbar panel) on my MDI parent form from a child form.

Here's my
(located in child form)
Dim frmParent As frmMain
frmParent = DirectCast(Me.MdiParent, frmMain)

[Code]....

Object reference not set to an instance of an object.

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Accessing Variables On A Parent Form From A Child Form

Aug 13, 2011

I have an array of variables called VolumeArray(12) which is declared as publlic shared in the main form1.I have a second form2 which allows the user to input various values. When this form2 is closed, I need the data the user has entered to update the values for VolumeArray(12) within Form1.

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Asp.net - Accessing POST Data From ASCX User Control On Parent Page?

Nov 1, 2011

I have an ASP.NET page (WebForm) on which I set the content of a central DIV by dynamically loading one of five user controls during Page_Load, dependant on the stage of the application.

One of the user controls contains radio buttons and a text box together with a submit button. What I want to do is process that information when the form is posted using the submit button.

I could do this with an AJAX call using jQuery, but I don't really want to do that, so I'm trying to access the form data on postback, but on page load following the postback the data is not present in the Request.Form object.

Looking at what I need to do it seems pretty simple and I'm sure is once you've got your head around it, but I can't find out how to carry this out. Some of the things I have read refer to event bubbling, but that doesn't make too much sense in this scenario.

EDIT: To clarify, I want to post the page back to itself to capture the values from the form elements via the Request object, store them in the database, and then display a confirmation message (or something else) on postback, and not re-display the same control again. So I won't be loading the same user control again.

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Gradually Transition To NHibernate Persistence Logic From Existing ADO.NET Persistence Logic?

Sep 3, 2010

The application uses ADO.NET to invoke sprocs for nearly every database operation. Some of these sprocs also contain a fair amount of domain logic. The data access logic for each domain entity resides in the domain class itself. ie, there is no decoupling between domain logic and data access logic. I'm looking to accomplish the following:

[Code]...

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Time Logic - Retrieving Specific Times From A User Form

Oct 10, 2011

I need some help working out the logic when retrieving specific times from a userform I have created. In my userform, users are required to input a start and a end time in 24 hour time format. I am struggling to work out how best to analyze the selected times in order to multiply them by a set of rates, the rates are quite simple:

DayHours rate (day time is between 07:00 - 22:59)

NightHours rate (night time is between 23:00 - 06:59)

I cannot workout the logic to ascertain how many hours have been selected for which rate in an elegant manner, my best attempts so far are clunky and not quite there.

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VS 2010 Place Drawing Logic On Form Or Within Object To Be Drawn?

Sep 10, 2010

I am working on a snake game for my portfolio and was wondering where the best place to put the logic for drawing the snake. Should the code reside within the snake object or within the form? Either would work, but I am wondering from a business objects/coding standard perspective where such code belongs.

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Accessing Datasets Loaded In Main Form From A Child Form?

Aug 11, 2009

I have a program I've been working on for some time now and I'd like to try to streamline it somewhat. I have a main menu form that has a split panel, in the left panel is a treeview that displays forms you can open and when one is selected, it opens in a child window in the right panel. Each time I open form I called DWNForm, it does a series of dataset loads which are the populating items for a series of listviews.

What I would like to do is have these datasets load once during the mainMenu load and then have the DWNForm be able to access the datasets once it is called from the treeview selection.

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2003 Control On Child Form To Create Event On Parent Form?

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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Change Startup Position And Move A Docked Form With Parent Form?

Mar 23, 2011

well i successfully docked a perpixel alpha form with the main form(form1). but the perpixel alpha form always appears at the top left corner of the screen and when i move the main form the form(perpixel alpha form) inside it dosen't move it stays at the top left corner. ALWAYS. to dock the perpixel alpha form i used

Me.toplevel = false
Me.parent = form1

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VS 2010 Sub/Child Form Close When Click On Main/Parent Form?

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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Write Text From A Parent Form To The Active Mdi Child Form VB 2010

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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Call A Form Load Parent Event From A Child Form?

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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Create New Instance Of A Form That Does Not Close Then The Parent Form Closes?

Oct 28, 2009

I have been making a webbrowser for a while now, everything works well, except i am unable to make the 'open in a new window' button work right. So far i have managed to get a new instance of my form to open with the right url, but i am unable to keep that new form open when the orginal parent form closes.

Code:

Private Sub WebBrowser1_NewWindow(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles WebBrowser1.NewWindow
e.Cancel = True
Dim Href As String

[code]....

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DB/Reporting :: PopUP Form Refresh Combobox On Parent Form

May 31, 2008

I have a parent form that has a combobox. Whn the form loads I get the data from the db and bind to the combobox. that works fine and here is the code I use in form load to cause this to happen: [code] Now if there is not an Account Type, I have a button that will pull up a small form to allow the addition of an account type. The popup form adds the data back to the database just fine, but I am now trying to get the combobox to refresh its data. So I call a public Sub that is located in the parent form to from the popup form to accomplish this task and I have walked the code and the sub is called and appears to work correctly, but the new data never appears in the combobox. Here is my public sub that i call to try and refresh the combobox on the parent form. [code] But when I go back to the parent form, the combobox is not updated with the new account. How can i get the combobox to refresh from the database with the new data?

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Open A MDI Child Form Using A MenuList On The Main MDI Parent Form?

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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Refreshing DataGrid On Parent Form After A Child Form Has Updated DB?

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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Stop All The Functions On Parent Form While Child Form Is Still On Screen?

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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Update Open Child Mdi Form Textbox From Parent Form?

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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Updating Parent Form From Dataset After Editing In Child Form?

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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VS 2008 Different Ways To Call Another Form From A Parent Or Preceding Form

Aug 4, 2009

I need to know the proper way, or maybe I should say, the different ways to call another form from a parent or preceding form. I am currently using ex: formname.showdialog() to call my next form, but I am uncertain if I should be using that in every situation. [code] Whats the difference between these different methods? (ex: .showdialog() , .show() )I tried both of these to open a temporary form to retrieve a persons name from a database, so as the users progresses through my training program they can keep track of their scores.But, I also call other forms as I branch through my program, from the main page, to a secondary page, to a testing page, to a results page and then back to the secondary page

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VS 2010 : Load A Child Form By Default In MDI Parent Form?

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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VS 2010 Child Form Tell Parent Form It Is Closing And Send ID?

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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Winforms - Disable The Parent Form When Call A Child Form?

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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C# - Access A Value That Is Entered Into A Child Form From A Parent Form?

Jan 10, 2011

Communication between form can be done in many ways using constructor using delegates etc in .net but my question is how can i access a value that is entered into a child form from a parent form or can a two way communication is possible between windows forms.

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Call Child Form Event From Parent Form?

Oct 20, 2009

Could i call the child form events like (closing ,load, activate,closed) .

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Close Child Form When Click On Parent Form?

Jun 5, 2012

I am having some trouble in my Windows form application. I have 2 forms:

1st Main / Parent Form

2nd Sub / Child Form (Menu)

Problem:

I want to close my 2nd form (which opens on top of 1st form) when I click on the 1st form.

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Data Of Child Form Does Not Appear When Running The Parent Form?

Mar 2, 2012

i have a parent form-->frmComparisonTool the child form is-->frmIterationWindow i used the following codes to integrate the second form to the main one:

Private Sub ComparisonTool_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim debuglist As New IterationWindow
debuglist.TopLevel = False
Me.DebugWindowPanel.Controls.Add(debuglist)

[code]....

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Disable Parent Form When A Child Form Is On Display

Mar 15, 2012

my application have a main form. i have set the isMDIcontainer to true on the form properties. How do i set other forms to child form of the parent. i need to do this because the other forms start position is CenterParent.but as it is now when i run the program the other forms start position is not the parent form centre.Secondly, how do i disable the parent form when a child form is on display. so that user cannot click on the parent form until the child form is closed.

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Disabling The Parent Form When Child Form Is Open

Jul 18, 2012

disable the parent window form as soon as the user will open the child form....

for eg...consider daniweb...when we click on member login the background form gets grayed out....

Disabling the form is not the option cause it will just disable all the controls of the form....but I need a grayed out screen between the current child form and the parent form....

note - the parent form is not the MDI form...it is just a normal window form and when the child form is open and if the user clicks on the main form without closing the child form then the screen should show some movement...

I tried disabling the form...changing the background of the form to opaque....but could not get through it....

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