Getting Bug In ComboBox Control?
Oct 7, 2010
I have an issue with a combobox control highlighting the wrong item when the dropdown menu is clicked. This occoured first in a project so I tried to reproduce it on its own and indeed it seems to be a problem with the control itself.If there is an item in the list above the selected item that starts with the same characters at the selected item, the combobox will hightlight that item.eg. If you select an item on the 5th row 'XX' when there is an item on the 3rd row 'XXG' then control will highlight the 3rd row when the dropdown menu is clicked again not the 5th row - even though the control shows 'XX' and the selectedindex is 4.This can be recreated in Visual Studio 2010 / Visual Basic:In a blank windows forms project create a single combobox control (ComboBox1) and paste this code:
Imports System.Data
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code]....
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Feb 20, 2012
I have a tab control application, each tab loads a particular user control and each of those user controls will then add other user controls that are used amongst other the user controls. For example, I have an "ucQuotes" page and an "ucInventory" page, when the specific tab is selected, the "uc****" user control is loaded on that page, and in the case of "ucQuotes" and "ucInventory" they both use a control called "ucPartNumber"; a user control consisting of a combobox, textbox, and button. I have no issues reusing the shared user controls, in this case. My problem arises with my "ucQuickPrice" control, as it is always present at the bottom of the tab control form (separate from the tabcontrol, but on the same form), and it too uses ucPartnumber.
Here's my issue, as I type into the ucPartnumber combobox, the text I type does not appear in the combobox, it appears in the textbox of the ucPartnumber control that is being used on the tabcontrol page. There are no shared instances of ucPartNumber, nor do I have this issue between typing on one tab page and the text showing on the user control of another tab page.I tried just creating the ucPartNumber controls on the ucQuickPrice control, not adding a new instance of ucPartnumber on the .Load event, and the issue persists.
The combobox(s) in question are bound programmatically with about 40,000 items, ".datasource = dataset.tablename" not to a bindingsource. Autocomplete is set to none, I added code to utilize tool tips and the basic combobox filtering functionality. Is this a bug, or is there something I'm neglecting? I'm about 95% complete with this application, and this just happened today. I made the decision, to just reuse the ucPartNumber control on the ucQuickPrice control (originallly it's size and orientation would not fit, but I added some coding to detect what parent is adding ucPartNumber and to change its appearance accordingly). Before, I made this change, I did not have this problem. And, in trying to go back to how I had things set up before the change, the problem will not go away. if the whole control within a control verbage I used is a bit confusing, let me know and I'll try to better explain what is happening. At this point, I'm going to close and reopen vbexpress, as when I started this ordeal, vb started acting weird and wanted me to save all my work, it usually does this before locking up.
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Jan 21, 2010
i make this code to achive what i need[code]but in datagridview what i make when i want to convert to use in dgv
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Feb 3, 2010
If have a control that acts like a record selector from a database, say, for example, customers. The control must act in certain ways allowing the user to type the name, the alias or the code of the customer, and the control will select the correct one, or offer a list of possible candidates, and other behaviors. I have tried to inherit from ComboBox, but there are some ComboBox behaviors that make it difficult or impossible to do what I want, so I'm better starting from scratch, with a TextBox and Button.
The questions are: Do you know some open-source component so I don't have to start from zero? Have you already done something like this and want to share methodologies or tips? Am I good with a TextBox, a Button and a PopUp control?
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Dec 9, 2009
I am trying to create a sub routine that I can use to clear all items on various ComboBoxes on a Form; this is the code I was trying to use [To no avail]:
Public Sub Clear_ComboBoxes(ByVal ComboBox_Name as String)
if Controls(ComboBox_Name).Items.Count > Nothing then
Controls(ComboBox_Name).Items.Clear
end if
End Sub
I am writing the code on a seperate module to the Form; which means I can't use ME.Controls; but Form_Name.Controls doesn't seem to work either.
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Dec 15, 2009
ok, so what i need to know is how to control a combobox which is into the web page I want to know how to control the combobox into the webpage, change the selected option and so.
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Feb 25, 2010
I'm trying to create a ComboBox control with a TreeView style. I have been giving a link to an article by MSDN forums which include a sample as a starting point. [url] I downloaded the sample and convert its C# code to VB. The sample is a windows forms application so I moved the controls of the sample to a new Windows control library. I also modify and added some of the code to try to make it the way I want. Now I'm facing a problem with this control and I need your help to understand why it not behaving the right way. I'm trying to learn and build a ComboBox with a TreeView style.
The control inherits from the windows ComboBox control and when I place it on a form for the first time it look exactly as a CompbBox control but once I run the application for the first time the control appearance become deferent and it's not drowning its self as the windows ComboBox do. When I try to expand its width by dragging one of its sides by the mouse it doesn't work properly. I struggled understand why its behaving this way and how I can correct this behavior but unfortunately I couldn't. [Code]
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Jan 12, 2011
I'm trying to get the 'Enter' key to behave like the tab key in a combobox control. I've placed the following code in the keypress event: If e.KeyChar = ToChar(Keys.Enter) Then NextTextBox.Focus()End If When ran, nothing happens. I've placed a break point at the 'private sub' line, and the code is not breaking. What am I doing wrong?
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May 29, 2009
I'm inheriting a couple of the common WinForms controls and then manually repainting them so that they will correctly render over a WinForm with the Aero Glass effect enabled. I have this working well with the TextBox. I ran into a snag with the ComboBox though in that it would only repaint some of the control. I fired up MS Spy++ and saw that the ComboBox has an Edit control in it (that's not in it's control collection). I can repaint that Edit box, but I need to get the handle of it and a couple of my attempts have flopped. I found some code that used the FindWindowEx API passing the Comboboxes handle but for me it returns 0.
hwndEdit = FindWindowEx(Combo1.hwnd, 0&, vbNullString, vbNullString)
Basically, I need the handle of the edit control inside the combobox (once I understand how to correct get that then I can get the additional controls in other ones I want like the ListView). Here's the Spy++ screen shots to illustrate (from Spy++ I can see the individual handles).
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Aug 24, 2010
i was able to set the name on the form on the page using.[code]ive found lots of ways to use the ID to select but nothing that will work with this javascript(i think it is)as there are no IDs, ive tried everything i could find.just to be clear, the is a webpage im loading into a vb.net 2010 app via the webbrowser control. im trying to change the selected index of the combobox in the webbrowser control to match what i have selected in a combobox control in the same application.
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May 29, 2009
I'm hung up on the syntax to bind a value to a combobox control. I store the ID of the value in a database. I want the value to show in the combobox control. How do I do this? [Code]
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Feb 23, 2011
In VB6, if I copy and paste a combobox on the form, VB6 automatically asks if I want to create a control array. VB2005 does not do this when I copy and pasted on the form. How can I create control array for comboboxes on the form similar to VB6 method?
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Oct 23, 2009
I am using combobox on my form as I want to control the aspect ratio of flash in vb.net, but I have no idea how to control them using with the combobox.
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Feb 16, 2012
I'm trying to assign a datasource to a ComboBox control during runtime. When I do so, I get the attached message. Here is my
cmbAddressDesc.DataSource = dbDataSet4.tblAddressCodes.addrDescColumn
dbDataSet4 is a typed dataset. I want to learn how to use an Interface. The error message is suggesting using an IList. How would I do this. I'm having trouble finding good documentation on this.
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Oct 20, 2009
The form has 2 ComboBox and 1 NumericUpDown controls. I would like to change value of NumericUpDown based on selection in ComboBox. For example:
ComboBox1 has three value. for instance, AAA, BBB, CCC
ComboBox2 has three value. for instance, DDD, EEE, FFF
The NumericUpDown should has range 0-6 sum of both ComboBox. For instance, if user select from ComboBox1 AAA and from ComboBox2 EEE the NumericUpDown should display value 5.
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Apr 9, 2010
Is there any control like this? I want it to be just like a textbox but I can bind it and be able to set its DisplayMember and ValueMember.
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Sep 3, 2009
i create my custom combobox control and i'd like to set DropDownStyle property on DropDownList but it not works correctly. [Code] When i put my custom control in my form i want to see DropDownStyle set to DropDownList and not DropDown as default.
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Mar 3, 2011
How do you use a parameterized query to make the (last_name, first_Name) appear in the same combo box? I know how do drag them over from the DATA SOURCES menu, but I am trying to combine them. So instead of it being two separate combo boxes with both last_name and first_name), it want it to find the the names with first and last name in the same combo box.
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Jun 17, 2010
I have a WinForms applciation, I wrote a function that returns a list of all the controls on the form. The function returns a list of control objects.My target is to fill up a combo box with a list of the control names so that once clicked I set focus to it.So what is the correct code for converting a List(Of Control) to an array of string.
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Jun 17, 2010
Fill Combobox with List of Control names
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Aug 8, 2011
I'm creating a composite user control and trying to exposing the controls as properties so that I can databind them from the form that I drop the user control onto. One of the controls I'm trying to expose is a combobox and I can't seem to figure out how to expose this combobox to the designer. I'm trying the following code that I've cobbled together from what bits of documentation I can find but so far no joy.
<Category("Data"), Bindable(True), _
Browsable(True), EditorBrowsable(EditorBrowsableState.Always), _
DesignerSerializationVisibility(DesignerSerializationVisibility.Visible), _
AttributeProvider(GetType(IListSource))> _
Public Property RollbackCombo As ComboBox
[Code] .....
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Jan 14, 2010
Retrive ms accees data in vb form using combobox control. If user select combobox vale 1 then record display in textbox.
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May 2, 2012
I have some issue can't control combobox on external application since used .Net Application
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Feb 27, 2010
How can i get or change the selecteditem in from a webpage combobox in a webbrowser control?
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May 15, 2012
What I to do is really simple. I want to add a group of text boxes in my VB net application. note that the number of text box only can be known at run time.
I want to give default value to this group of text boxes. At run time, users can input text and change the text for each item.
How can I do this? Is there a control to do this?
What I can remember is ComboBox control. However, I only can display the item text and do not know how to change the text for each item.
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Jul 26, 2010
I have a form where I have to use control arrays to create a multiple input form i.e. rather than processing one transaction at a time up to 16 transactions must be processed. The following really havent given me much problems at this moment labels and textboxes. I use a for construct to create all the controls including a combobox. This is where my question comes in this form combobox has to be linked to a table in a database. But furthermore and this is where it gets complicated for me anyway each seperate combobox must move independly if i select row 5 in the table in combobox 4 combobox 5 which is havent touched should still be on row 1. How do I accomplish this. I'm using a webservice. I have tried passing a loaded dataset . The code that loaded the dataset is as follows
Dim DSInfo As New Project1.localhost4.AccInfo
DSInfo.Credentials = System.Net.CredentialCache.DefaultCredentials
InformationData.Merge(DSInfo.GetBusinessJournals)
[Code].....
this code doesnt however provide a link to the table equallly creating a dataset in the combobox method ,loading it and then setting it as datasource also provides no link. I know i'm missing something.
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Mar 11, 2009
I have a very simple database project. I made some project before, and now I can't find the error in my project. So I have two database, one for customers, and one for customer statuses. I want to use a databounded combobox for control customer statuses. But this combobox isn't working. I made everything, like in my other projects, I used datbounded comboboxes before. I attached my project, and my .mdf file. Copy the .mdf into C: root. MY project's language is not english, but the whole project is very little.
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Jan 26, 2011
I have a combobox on an Excel worksheet that I can tab into, then pick my data (located on another worksheet) after activating the "arrow". But the tab or enter key does not allow me to navigate away from the cell after it is populated. The only action that allows the user to move to another cell is by mouse/click to another cell. I am trying to make navigation through though worksheet as user friendly as possible.I can't seem to find any sample code that will take the focus away from that cell using Tab or Enter.
I have no problem with ListBoxes created using the Data Validation method but I have to create a ComboBox control on the active worksheet in order to return the data chosen (in this case a code that corresponds to a description). If this was a Form I wouldn't have any problem as the properties would allow me to set that up, but this is essentially a spreadsheet I've inherited and the current users do not want to go to a Data Entry Form.
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Apr 7, 2010
I can't seem to get this to work so I need a fresh set of eyes on it! I have a combobox dropdown with some names. When I select a certain name from the list, I want it to change the textbox property.I tried :if combobox1.selecteditem= "edward" thentextbox1.maxlength= "2"
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May 30, 2011
I have 3 controls in my Form.Two Dropdowns and one textbox.My task is if i select a value in one Combobox then the related text should be display in other two controls.Ok I wrote a code in "SelectionChangeCommitted" event and now i am getting the values correctly.
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