Forms :: Using CheckBox As Control In DataRepeater Object
Aug 31, 2011
I have a checkbox as a control in a datarepeater object. I have an event handler function which handles the checkchanged event for this checkbox and sets the visibility of other fields based on it. However, the problem I am having is that the event handler function is getting fired when I set the datasource for the datarepeater - hence when the data is being populated. So the event handler function ends up trying to set the visibility of a field that has not been created yet and bombs out with a NullReferenceException error. Is there a way to stop this event handler being fired when the datarepeater is being populated? I only want this function to be called if that checkbox is changed by the user after the form has loaded.
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Sep 21, 2009
I am using the Datarepeater control to make a report. I am including the a couple of bound labels and a checkbox in the Datarepeater item template. When I run the report and multiple items come up, I'd like to use the checkbox and clear the items by resetting there values to NOTHING. When I check the checkbox for the item, how do I code it so row.text=nothing only applies to the row that the checkbox is on?
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Mar 28, 2011
I'm seriously about to abandon this DataRepeater. I don't want to. I want greater design control than the DataGridView. I've played with various Events for days and have settled on the CheckBox.CheckChanged Event.
What I'm trying to accomplish: My Bound DataRepeater has an UnBound CheckBox in each DataRepeaterItem.When the user 'Checks' the CheckBox, I want to change the value of a NumericUpDown Control to the value of a hidden, Bound Label.
[Code]...
This causes other, seemingly random, DataRepeaterItems (Rows) to also become Checked and thus it's NumericUpDown value to change.Am I going about this from the wrong angle? Can't see the forest for the trees?
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Aug 30, 2011
This is my first post here so forgive me if I am not following any correct protocols. I am attempting to generate a DataSet and bind it to a datarepeater object. I had been doing this at Design Time and was getting an error message when filling the dataset when the form loaded. So I am basically createing the dataset in my code now when the form loads and binding it to the datarepeater. However, when I attempt to bind the dataset I get a NullReferenceException - even through I know that there are 60 rows of data in the dataset table.
[Code]...
As you can see i have several debug messages in there. I get the error on the last line when setting the datarepeater data source. I try and get data for a specified lot - if it doesn't return any values I create some values in the datatable and add them to the DB. On first load when there is no data this works perfectly. If I then close the form and reload it, it will display fine. However, if I change any of the data (database is updated) and then go back in again, I get the error above.
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Apr 13, 2010
im trying to figure out how on earth to set a checkbox on a DataRepeater row to true. Nothing ive tried seems to work. Ive searched all over, and all i seem to find is ways to check the state and in ASP.
Text boxes would be:DataRepeater1.CurrentItem.Controls(
"textbox1").Text = textbox2.Text.However, checkboxes wont work in this way. DataRepeater1.CurrentItem.Controls("Checkbox1").Checked = True"Checked is not a member of windows.forms.control" - ive tried various things in order to set it to true/false, but whatever i do doesent work. I expect its going to be something stupidly simple, but its those things that annoy the most IMO!
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Jan 17, 2011
Is it possible to get value of a text box, say at row 4 of a datarepeater. I did it by moving control to it, but that does not work the way I want. I used code DataRepeater1.currentIndex=5, and then picked the value. Is there any possibility of getting the value without moving control to this row. I mean the way we get value from datagridview (vrName=datagridview1.item(1,1).value)
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Jan 17, 2011
Is it possible to get value of a text box, say at row 4 of a datarepeater. I did it by moving control to it, but that does not work the way I want. I used code DataRepeater1.currentIndex=5, and then picked the value. Is there any possibility of getting the value without moving control to this row. I mean the way we get value from datagridview (vrName=datagridview1.item(1,1).value)
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Jul 19, 2010
I'm using a dataRepeater which is unbound to a list of Objects ( as I need to have two types of object in the dataRepeater).I'm using the following code to populate my dataRepeater
Private Sub loadDeviceDetails(ByVal owner As Mi2.MiOwner)
............
Dim listDevices As New List(Of Object)
Dim c As Integer = 1
[code]....
For some reason the first drawItem runs once, as expected. therafter it runs twice for each new item that is added to the dataRepeater.
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Mar 24, 2010
I like the datarepeater control (cool toy) but it doesn't show in my WPF toolbox.
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Apr 12, 2011
Is the "DataRepeater" control derived from the "Visual Basic Power Packs" applicable on ASP.NET web forms? If not, is there a similar control for use on the ASP.NET web pages?
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Apr 29, 2010
Visual Studio 2008 service pack 1 comes with Visual Basic Powerpack and has DataRepeatr control. i want to know that how I can add data in this control. i have in memory data. the examples i found on net are about binding DataSet to DataRepeater by fetching data from database. i want to bind in memory data. how to do this.
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Sep 10, 2010
is it posible to change a width of dataRepeater vScroll control
OR
How I can simulate mousewheel on datarepeater.item ?
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Feb 25, 2011
How do i make sure that the changes "done" by a user interacting with a DataRepeater control are reflected in the corresponding database source table? I have used DataRepeater in VirtualMode, do I have to supply my own code that will "actually" make corresponding changes to the actual tables, or is there a way of "configuring" or "binding" the controls on the DataRepeater to the "dataSet" so that the changes made by the user are reflected automatically in the underlying table? Whatever I have tried so far has yielded no results; whenever i edit the data on the control, the actual data is not updated. I attach a file showing the only events under which i have put some code: Load event of the Windows form, and the ItemValueNeeded event of the Repeater Control.
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Apr 18, 2012
I have an object (a third component gridview) which is serializable, and I need a deep clone of this object. I have the following code which throws the exception."The type System.Windows.Forms.Control in assembly System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKey Token=b77a5c5 61934e089 is not serializable".So the gridview's base class is System.Windows.Forms.Control, which is not serializable. How can I get a deep clone from the gridview? [code]
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Dec 13, 2010
I am refreshing a form, and I want to assure the checkboxes are cleared when refreshing. I can clear the textboxes and masked textboxes, but cannot figure out to revert the checkbox back to the UnChecked state.
[Code]....
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Jun 7, 2012
I know how to handle a single objects property changed event very easily. I want to handle a objects property changed event that is part of another object.
Given Object:
[ObjectY = Y]
+ Public WithEvents X As ObjectX
I would like to do something like:
Private Sub XPropertyChanged() Handles Y.X.PropertyChanged
Right now I need to create a object that equals the object inside that object and then handle this variable pointers property changed, but that is just annoying.
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Apr 12, 2009
I was wondering if there is a way of making a picture have the properties of a checkbox. I want to have clickable stars that change color (from white to yellow) everytime the user clicks on them to represent the rating they put on certain foods.
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Oct 20, 2009
I have a secondForm that determines whether a checkbox.checked = true/false and I want the firstForm to verify whether the secondForms checkbox.checked = true/false in a function
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Apr 8, 2010
I'm reading in a RTF file that I want to search by either using WholeWord or MatchCase search options.
atm I have this:
If (chkWhole.Checked = False) And (chkMatch.Checked = False) Then
'ERROR - MUST SELECT A SEARCH OPTION
[code].....
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Jan 16, 2010
Ok im using an image as checkbox. so when i click the label next to it it will change from Uncheck image to Check image...
Ive tried:
If checkInj.Image = My.Resources.unchecked Then
checkInj.Image = My.Resources.checked
Else
[Code].....
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Jun 20, 2011
I have a datagrid that is populated by a user starting and ending value. Each record has two check boxes. Here is an example;
Starting: ABC001
Ending: ABC004
Datagrid;
[code]....
The second problem; The user can move between different forms (forms that do not display the datagrid). Now what I did is create a class;
Public Class Class1
Public userData As DataGridView
End Class
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Aug 24, 2009
Our customers get an unahndled exception as stated above. Can you tell me how to trap the error on customer applicaiton? Customer does not know when the error comes so i want to know what causes the error.
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Jul 6, 2011
I have a solution with several Projects in it. There is a Windows App project (called ImportClient), and a Class Library (Import.Library). The Import.Library has functions to perform data imports (I have other applications in the solution that also need to call it). But the interactive application, I want to be able to pass in some form controls, and have it update the GUI. No problem. But, I also want to execute a DoEvents() so that the loop execution doesn't hang other interaction to the app.
So, ImportClient has a reference to Import.Library. But I can't add a reference to ImportClient to the Import.Library, because the compiler complains about circular reference, etc. I don't know how else to define the My.Application object of ImportClient as a parameter to the data function in ImportLibrary.
(I realize this is a dumb question - problem is, for this project I have a tight timeline, and haven't learned how to do the BackgroundWorker process. If you think I could pick it up quickly, I'm open to some hints about how to update the progress bar on the GUI, and how to pause / cancel the background task.)
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Feb 10, 2012
I have created a custom user control (JCUserControl), and I am using it in the Main Window. And my Main Window has no codebehind. I have this in the JCUserControl codebehind:
Private Sub ImmediateRadioButton_Checked(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ImmediateRadioButton.Checked
SomeTextBox.IsEnabled = False
End Sub
When I run it, it fails with the NullReferenceException. If I comment out the SomeTextBox.IsEnabled = false, it runs without any problems.
Edit: Found out that I could just check if the radio buttons are loaded before doing whatever I want to do.
Private Sub ImmediateRadioButton_Checked(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ImmediateRadioButton.Checked
If ImmediateRadioButton.IsLoaded Then
SomeTextBox.IsEnabled = False
End If
End Sub
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Aug 13, 2010
Any example of checking the status of a CheckBox via a Thread.
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Oct 27, 2009
I would like MyProcess() to fire when I click on any of several checkboxes. I could do it like this. [code]I have alot of checkboxes, and anyway, this method isn't very scalable.Is there any other way for a form (or panel maybe) to detect mouse events on child controls kind of like the way the KeyPreview property of a form allows it to detect key events of it's child controls?
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Apr 5, 2009
I need to make the text value of a checkbox appear on a listbox when I check it and when make it disappear when I uncheck it. However, I need to do this with 100 checkboxes, and doing it per checkbox, I need a code that for any checkbox checked and unchecked, the text value will be listed or cleared on a listbox.
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Oct 14, 2010
I'd like to refer to 12 checkboxes on my form, "CBOX_mnth1....CBOX_mnth12", by a variable. So I'd like to loop through 1..12 and assigning the number after the text "CBOX_mnth". This together would make the controlname, like CBOX_mnth7 in case of x=7.I hope this is a bit understandable, for Englisch is not my native language.
I wanna do something like this:
(the {..} are from another language and used to assign a variable as controlname, which is axactly what I'm after in VB.net)
[code]...
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May 6, 2009
I added a tooltip control in my form and set a tooltip for a checkbox. The tooltip shows fine until I check the checkbox... If I check the checkbox once and uncheck it, the tooltip never shows up when I hover the mouse over it... How to make the tooltip to show on mousehover no matter the checkbox is clicked or not?
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Jan 4, 2011
I need to make a program (or if someone wants to make it for me, feel free to do so) that has a starter form with a combobox where you can select different sizes, like 2x2, 4x4, 6x6 and so on. When i then press the button to choose size, a new form would pop up , with 4 different grids of checkboxes, (white, red, green, blue).Do i have to make each form (frm2x2, frm4x4) and make each individual checkbox, or is there some other much greater solution?Because, in the end, i don't feel like naming 576 different checkboxes for just 1 form.
After all that has been made, it would be saved to a text file, with 0 being anything thats unchecked, 1 is white, 2 is red and so on. And it would look something similar to this:
[Code]...
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