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?
Away back in the days of "dBase 3+" and "Clipper" we had a useful command called "COPY STRUCTURE" for copying the structure of a database table without copying the data. Does VB.NET have a similar capability for cloning a DataGridView and for cloning a DataSet?
I have a groupox in a VB.NET winform app. The groupbox contains a few Labels, Textboxes and Checkboxes. This was created by simply dragging the controls out of VS toolbox. What I need to do is take the 1 Groupbox and at runtime create multiple Groupboxes to display based on user selection. Instead of dynamically creating the Groupboxes and other controls nested inside, is there a way to clone or copy the original one. Then I'd just change the properties. Label text, Textbox text, etc. And the location of the Groupbox in the layout.
I have a form that accepts a byval client object in the New
private _client as clsClient = Nothing Public Sub New(ByVal client As clsClient) InitializeComponent()[code]....
On the calling form I have labels bound to the properties of the _client object, like first and last name.On frmEditClient if have textboxes bound to the same fields.What is happening that I don't understand is that when I'm showing the frmEditClient as a modal window of the calling form, when I change the first name, for example, the labels bound to those fields on the calling form are also changed as I type, indicating that they both point to the same object.
Now this is rather cool, but I expected the object to copied and a new instance to exist in the frmClient modal form, but obviously it is the same instance.Is this because the object is a reference type and so by specifying byval in the frmEditClient creator has the same effect as passing byref? I wanted a separate object in case the user edited the object in frmEditClient and then decided to hit the cancel button and not commit the changes. In this case, do I need to clone the client object before I send it to the frmEditClient?
Like this:
dim _cloneOfClient as clsClient = _client.Clone Dim f As New frmEditClient(_cloneOfClient) If f.ShowDialog() - DialogResult.OK Then _client = f.Client End If
Problem: There is no clone method. How do I get a copy of an object that is a new object?Or is there a better way to do what I'm trying to do?
I am attempting to deep clone many of my objects via serialization. Most of it works fine, except when the original object has event handlers for their events. Then the holders of the event handlers are being cloned as well. Anyways, from web browsing it appears the right way is avoid cloning the events. However, you cannot put <NonSerialized> in front of an event declaration, but the C guys seem to get around this by writing [field: NonSerialize] (I guess directing the program to the underlying field, over my head). What is the VB .Net code equivalent to this, as I can't find it?
I'm currently trying to write a program that will clone input from one program and broadcast it to 4 other windows (Mouse and keyboard, with the exception of the enter key). This is for a World of Warcraft and it is legal. I thought that I would use setWindowsHookEx, but I can't figure out how to set it up that it only takes the input from one window and not globally.Can anyone recommend the best way of cloning keyboard and mouse messages ? or give me an example of how to set a windows hook for only one program ?
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.
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
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.
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.
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]
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?
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.
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).
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.
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]
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?
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.
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.
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.
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.
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.
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.
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] .....
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.
