Reference DataGridView Control Before Showing Its Parent Form?
Mar 30, 2010I 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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Reference A Control On Parent Form From Child?
Oct 7, 2008Using 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.
Get Reference To Parent Control From Child Control?
Apr 20, 2012I 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]...
Detect Which Column Is Showing An Editing Control In A Datagridview?
Dec 16, 2009i have a DataGridView responsible for showing a bit of data and two of my columns allow for user input using comboboxes.The trouble is that one column only needs to show preset values in it's list, but the other needs to both show the presets and allow for the user to enter in their own values.i accomplish this by showing the editing control for the combobox with this bit of code:
Private Sub DGV_EditingControlShowing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DGV.EditingControlShowing
[code].....
2003 Control On Child Form To Create Event On Parent Form?
Oct 28, 2010Here 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].....
Set Obtained Value To Datagridview Parent/Child Form?
Mar 6, 2012I'm trying to pass a variable from a child form that contains a DataGridView, I'm calling a function to do the action, but I can not succeed alone function gets the value but does not alter the form's datagridview father, the code I'm using is:
Invoice_new (Parent FORM):
Controls:
DatagridView: invoice_items
Public WriteOnly Property ValueFromChild() As String
[Code]....
Get Parent Form From User Control?
Oct 22, 2010I'm creating a user control that contain ToolStrip and some ToolStripButton, and i named it as 'myToolbar'.
This myToolBar will be put on all forms.
One of the ToolStripButton function is to close the form.
this method was created in user control object[code]...
Datagridview Not Showing Modified Data By Other Form
Dec 11, 2010I am creating one application using visual basic.net and sqlce I have two forms name Form1 and Form2.
I used Form1 to add data to database using OLeDb command I used Form2 to show data in datagridview by using dataset[code]...
Form2 Datagridview show the old data only, it do not show the recently added data by form1. I mean when I build my application datagridview show the data which is already in the database, but it does not show the data which is added by the form1 during run time.
Some one suggested me to fill the datagridview at run time by using OLeDB command. Then I created Form3 to fill the datagridview2 by using OLedb command and datareader and found that Form3 shows the recently(added by Form1 at run time) added data.
Single Form With DataGridView Showing Values From Oracle DB
Feb 2, 2010I have a single form with a datagridview on it showing values from an oracle database. I am trying to set up a way of detecting if the row/column I click on is empty or not, just as a little exercise. I have so far got this:
Private Sub DataGridView1_CellClick(ByVal sender As Object, _
ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) _
Handles DataGridView1.CellClick
Dim c, r As Integer
c = e.ColumnIndex
r = e.RowIndex
[Code] .....
The message going into lbl2 shows the co-ordinate values of any box I click in but as you can see with the IF statement below I am trying to see if the system can detect whenever I click in a value that is empty (null or ''). When I run my form and populate the list with a column of names I can click in 0, 0 cell and I get a message saying the 'Box is not empty' as above.
But when I click in any of the next boxes e.g. (1,0) (2,0) etc I get this:
'Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index'
Pointing to this line of
If Not DataGridView1.Item(r, c).Value Is Nothing Then
Not sure what this means at all. I am under the impression that my piece of code is gathering the value of the item depending on the co-ordinate values. so why should this fail? What index/collection is VB talking about?
RTB Control On A Form Showing Rich Text?
Aug 17, 2009i have a RTB control on a form showing rich text
At the top of the RTB i have a toolstrip with bold, italic, and underline buttons - these work just fine. However i need to add some color buttons, i dont need a color picker since i only need 3 colors - Black, Blue, Red. So i added some buttons for these, however i cant get the buttons to work... my syntax is wrong. I also dont want the color buttons to remove any other formatting from text (like bold, underline, etc) - i achieved this for the other buttons like so:
Private Sub BoldButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BoldButton.Click
NotesBox.SelectionFont = New Font(NotesBox.SelectionFont,
[Code].....
Create The Control Runtime And In The Memory And Not Showing Anything In The Form?
Jun 8, 2010I wanna to load a web page and login.I know how to do this with a web browser control but:I wanna to create the control runtime and in the memory and not showing anything in the form.I wanna to load many pages in the memory and extract my information needed without anything to see by user.
View 1 RepliesAsp.net - Setting Control Text In Parent Form From Modal Popup
Mar 28, 2012I have a problem I am trying to set the parent textbox from the modal popup.
Although I found the control from the modal popup with the below code
DirectCast(Parent.Page.Form.FindControl("ContentPlaceHolder1").FindControl("myAccordion").FindControl("txtTo"), TextBox).Text = str
This is being called on button click when the user has finished selecting from the Checkboxlist.
When the parent page is shown again though the textbox is empty.
The scenario of my user control is that a user is to select from a checkbox list which is a list of emails.
When done has been clicked then it is required that the selected emails be forwarded to the parent webpage.
Then the To Textbox in this case will be filled with the emails that the user has selected.
VS 2008 - Custom Control Not Showing On Form In Design Mode
Jan 31, 2011I have created a custom Combobox and added it to my toolbox, and it works well. Now I have added a custom ListBox to the same file as the combo box, but it does not show on my designer when I place it. I can however add it at runtime.
''ComboBox
<DefaultEvent("SelectedIndexChanged"), _
ToolboxBitmap(GetType(System.Windows.Forms.ComboBox))> _
Public Class ProjectsComboBox
Inherits ComboBox
''My Customization
[Code] .....
I have tried removing the "DefaultEvent..." and still no dice.
Releasing A Child From A Parent Control Without Knowing The Parent(WPF)
Apr 10, 2010I 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]...
VS 2010 - Reference DataGridView From Another Form?
Aug 29, 2011I wrote a routine using a DatagridView that I dragged/dropped from the toolbar--populate it with data and it works great! Now, I need to reference the datagridview from another form. So, I (hopefully, naively, after the fact) declare a Public dgv in a module with the same name as the dgv in the form I'm trying to reference--in the form itself, dgv.rows.count = some number, but when I reference it outside the form I get errors. Obviously my public declaration is not working as hoped--the dgv was working within its form without the declaration so SOMEWHERE it is declared and is not public, but since I dragged/dropped it (i.e. did not instantiate in code).
View 9 RepliesAn Object Reference Error - Control The Form
Feb 20, 2009I am writing this codes on classlibrary to make the changes of the text and I want to control the form as well. I have wrote the last if statement on the bottom of the code that if the form is on the right side, then set the form from righttoleft. I get an object reference which is not set to an instance of an object. Here is the list of the codes that I am writing to make changes of the text on each menu items and control the form. [Code]
View 5 RepliesShowing Data From Child Table By Clicking On Parent Record?
Apr 4, 2009Instead of connecting to database,I create datacolumns of two data tables.assign foregin key constraints and primary keys to the columns.Add these datatables to dataset and create relationship between them.Now by using RowFilter property,how to display the child table in a datagrid by clicking on parent record in another datagrid?Accept and Award Points Accept as Solution
View 2 RepliesDLL Not Showing In Reference?
Apr 21, 2009I have added a dll to the gac by using the following line of
C:WINDOWSMicrosoft.NETFrameworkv1.1.4322Gacutil.exe /i TARGETDIR "c:mydll"
When I open vb 2003 and try to add a reference to a project, I dont see the DLL. what I must do to be able to add it as a reference?
Readonly Reference To Parent/collection?
Feb 22, 2011When it comes to creating trees or collections, sometimes I want child elements to have a reference to the parent. Obviously it is important that the parent and child references to each other remain in sync. It seems natural to have code in the parent "addchild" and "removechild" methods that updates the child's parent reference.t also, the reference to the parent should probably be readonly, so it can only be changed at the appropriate time.Two examples in .Net that I've seen are the TreeNode and datagridview controls
View 11 RepliesTypes Not Showing Up For Service Reference
May 30, 2012I'm integrating one of our apps with a third-party provider's web service. I've added the service reference, but when I go to dimension a var as one of their types, the types aren't showing up for me in Intellisense. I'm using VB.NET/VS 2008 on Windows 7 and a 2.0 Framework web site running on local IIS. I have imported System.Web and System.Web.Service in my codebehind. I also made sure to check the "Always generate message contracts" checkbox.Types not showing up for service reference
View 2 RepliesVB Reference Parent Member Of A Class Through A Child When Using List Of(T)?
Feb 27, 2012VB Reference parent member of a class through a child when using List Of(T)?
View 1 RepliesSession Showing Object Reference To Null Exception
May 31, 2012I have a VB.NET application which runs perfectly with local host. But when I upload it to my server the session objects throw null reference exception.
Sessions is not working in a single page. If I use session on any other page it is working perfectly.
I have enabled session in that page using the EnableSessionState property. Also in web.config I enabled the use of session variables.
VS 2010 Changing Control Parent Property Changes Control Location Position?
Feb 16, 2011I'm trying to make a program with transparent labels over pictureboxes and when I set the label Parent to the PictureBox the position of the label changes.
View 2 RepliesOrder Of Creation Or Adding To The Parent Control Determines Whether Or Not A Control's Dock Property Supersedes Another's
Jun 17, 2010i frequently have troubles with the dock property. it seems that either the order of creation or adding to the parent control determines whether or not a control's dock property supersedes another's. e.g. a control with the dockstyle fill will overlap with another docked control on the same parent. does anyone know what the rules are to determine how docking will behave; particularly in dynamically created GUIs?
View 2 RepliesBind Property Of User Control To One Of The Parent Control's Fields?
Dec 30, 2011If I need access to the value of a user control's property BEFORE PreRender, would I need to base the custom control off of one of the preexisting data controls (repeater, listview,etc.)?One of my user controls features a gridview control that is configured based on the user control's properties on which it resides. Several of the key properties alter the SQL Statement for the underlying recordsource. I'm now in a situation where the property that sets the WHERE statement for the SQL Statement needs to tied to a value in the user control's parent FormView. Think of the formview as displaying a customer detail record. The user control takes the customer's account number and then displays data from a related table such as Customer Contact Names. Since the gridview is created before the control's prerender event, working within the prerender event doesn't seem efficient.
View 1 RepliesDispose Of Each Child Control Before Disposing Of Parent Control?
May 22, 2010I 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?
Form Transparency - Add A Control (like A Datagridview)
Jan 30, 2012I used some code i found that extends the aero glass border across the entire form... looks great... however when i add a control (like a datagridview) it doesnt look right at all because of the transparency of the form...
View 5 RepliesMove A Control With In Bounds Of Parent Control?
Nov 30, 2009i need a solution to drag and drop a child control with in the bounds of a parent control means i had a panel with 300*300 pixels and i had to drag and drop a textbox within the panel how
View 1 RepliesVS 2008 Bind A DataGridView Control On Windows Form?
May 11, 2011I am trying to bind a DataGridView control on my windows form. However, it doesn't appear to be working. Am I missing a step somewhere? I cannot get the objects in my collection to display in the DatagridView.
Here is a sample of my code. I have not included the Person class.
'CREATE A COLLECTION OBJECT.
Dim p As New List(Of Person)()
'ADD PEOPLE TO COLLECTION.
[Code].....
Open Form Based On Value (inside Column) In DataGridView Control
Jun 9, 2011I am developing a software using microsoft visual studio basic 2010. I used a datagridview control to display a list of data from product table. What I want to do (actually I am not sure how to do it, or is there a way to do it), when I choose one of the value in one of the column inside the table, I want it to open a form that contain data(details) based on that value.
How to do it? How to call the value that I pressed, so it can be used to open a new form containing the details of that value
Example of the data: (the "system" column) SYSTEM
topaz
nex1300
Nec
If I pressed "topaz" system, it will prompt me to a new form containing the details of that "topaz" system.