Automatically Selecting First Item In Combo Box?
Sep 1, 2009
When my application starts, it scans the computers registry for COM ports and adds them in the combo box. The combo box first index is just a blank, and the second is COM1, COM2,...COMn. What I want to do is by default, I want my program to select the first COM port in the combo box, so in this case, COM1.
I know I have to use the PORTNAME property of the serial object, but not sure how I would set that equal to the 2nd index of the combo box.
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Aug 6, 2009
I'm trying to automate a form process from a previous employee. One of the things that I have to do to achieve this is select a COM port from a dynamically populated list. I've looked around and the closest thing I could come up with is something like:
.cbbCOMPorts.SelectedItem(1) =
True
While this compiles, the computer does not like this at run-time. It throws an exception out:
"Object variable or With block variable not set."
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May 23, 2011
how to program by stating if the first item in the combo box is selected then
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May 24, 2010
I have a strange problem with a DataGridView I'm using which is bound to a table in VB.net
I've added a checkbox column to allow a user to tick a bunch of rows that I can then loop through and save off to a different table. All the checkboxes are enabled by default. So it's really a case of unchecking the rows which aren't required.
However, the DataGridView re-enables any checkbox that I click after I click on a checkbox in another row. So in effect, only one row can be unchecked at a time.
EDIT: I forgot to mention this is a Windows form, not an ASP.net application.
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Sep 12, 2009
I was just wondering weather it was possible to make it so that if I press the first a item on listbox1 then the first item on listbox 2 is selected aswell. For example I would like to have 2 listboxes lst1 and lst2 and I would like it so that when I select the first item on lst 1 then the first item on lst2 is automatically selected and when I select the 3rd item on lst1 then the 3rd item on lst2 is also selected.
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May 27, 2011
how do i program by saying if a certain item is selected in a combo box then that item will not appear in a second combo box. i have this code for now but it does not work
[Code]...
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Jul 18, 2012
How can i remove an array item by selecting an item from listobx and press remove/delete button?for an example, if i want remove index 2 from listbox, so the array should remove index 2 item and move the item of index 3 to index 2 and so on.
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Jun 11, 2011
I'm doing INVENTORY project... i'm using ACCESS databse with vb.net... i'm having purchase, sales tables...
THIS IS MY PURCHASE TABLE:
CodePriceCategory TypeDat SPBrnd
11222cde bgf9/10/2025356asd
12255MEN Shirt5/10/2010355Vanhesun
55322bb bb9/10/2025456asd
66422bb bb9/10/2025556fdd
when i select CODE in SALES form, corresponding values have to shown in respective fields... I.e if i select 55, corresponding values have to be retrieved and showed in respective fields...
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Feb 8, 2011
As some of you probably already know I'm currently creating a ticket ordering system. I'm having some slight trouble getting one of the key elements of the application to work mainly because I'm not sure where to start with it.
I currently have a form with two combo boxes (one for the origin of the journey and one for the destination). The idea is that the customer tells the employee over the phone where their journey begins and ends. They will also select a date of travel - but the date of travel doesn't really matter to much at this time.
Once a to and from is selecting from each combo box, the price will be shown in a label on the same form.
I have the to, from and prices information in an Access database table and my database is already linked to my application using a data connection.
trying to get to price to display when the two values in the combo box are selected?
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May 27, 2011
how do i program by saying if a certain item is selected in a combo box then that item will not appear in a second combo box i have this code for now but it does not work
j = 0
Do While j < cmbSession.Items.Count
If (j <> lesson) Then
[code].....
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Aug 7, 2009
My problem is i have two comboboxes, cmbFamily and cmbModel, I have values in cmbFamily: A320, A330 etc And i have a database that has all the available models for these aircraft types, i have got some help on a query so i can fill up cmbModel with all the models of aircraft available, but i only want to display the models related to the family that is selected in the cmbFamily combobox.
The query i have so far is
Query = New OleDb.OleDbCommand("Select Model From Availability", AccessConn)
'AccessConn is my database connection string I would like to have something that views the text in cmbFamily and then looks for all related model entries in the dataset.
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Jul 22, 2011
I want to have a listbox on the left and on the right a textbox and when i select an item in the listbox i want to read a text file or database and display the value related to it and then have the ability to amend the content.
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Oct 20, 2009
Say I have a listbox lb, which I initialize using:
lb.DataSource = wordList \wordList is a list of strings
lb.DataBind()
The listbox is initialized perfectly, and everything that should appear there does.
However, now I select one of items in the listbox with my mouse (coloring it dark blue, in case anyone wondered what I meant in "select"), and perform the following test:
[Code]...
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Oct 16, 2011
I`m trying to write simple program to choose any country and program automatically tell U on what continent is it... I add on form 1 combo box it`s name "combobox2" and 1 label it`s name "txtcountry" and on "txtcountry" visible is false. I think that when I or any customer choose any country, only after that label will be say on what continen is it I write this code
[Code]....
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Mar 29, 2009
I am new in programing and I need some help setting the Enabled = True on a botton when selecting an item from a listbox.I have a project when I have and add a new record form and an edit record form, in the form I have added a listbox where displaying the name of the file that I am attaching, but I have also added a delete button on the form, When I load the form I have the delete button disabled:
HTML Me.BtnDelete.Enabled = False But I would like to do is that when I select an item from the listbox for the delete button to enable.
This is what I have but doesn't seem to work:
HTML
If ListBox1.SelectedItem = True Then
Me.BtnDelete.Enabled = True
End If
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Mar 3, 2012
When i select an item in my combobox it raises the following errorColumn 'field1, field2' is constrained to be unique. Value 'test1, 1' is already present.The combobox is bound to the table to populate it with values from field1 witch is the first part of primary key of the table. (field2 is secont part of primary key).
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May 20, 2010
Here's how I'm trying to manually select a specific item in my combobox. cbEditCategory.SelectedIndex = cdEditCategory.Items.IndexOf(editItemCategory) I setup a msgbox to show "cdEditCategory.Items.IndexOf(editItemCategory)" and it's reporting -1. Why is it not giving me the right index?
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Dec 15, 2011
Our project is to make some simplified POS software, in our case, for a restaurant. The form I am currently working on is where you pick food items and add them to a listbox which will essentially be the order form. I made a database in Access that has food-item info and linked it to the VB project.url...My combobox narrows down the food items according to what category is selected, i.e. "Lunch".Now.. is there any way I can select an item from my database records (right box) and add them to an empty listbox that I'll save to a txt file. The database box is called "FoodItemsDataGridView" but maybe I don't even refer to that, I have no idea..
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Jan 14, 2010
I have a listbox with all items related to a person written in one line, e.g. Name, Gender, Phone #, Address, Email (all separated by a ControlChars.Tab).. How do I choose each individual item alone, e.g. Name, from a line to put it in a separate line in a file.This isn't working.. Can you tell me what code to use?
Dim outputFile As New System.IO.StreamWriter("Info.txt")For i = 0 To lstAllInfo.Items.Count - 1outputFile. WriteLine(lstAllInfo.Text.Substring(0, lstAllInfo.Text.Substring (" ")))Next outputFile. Close()
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Dec 3, 2009
I'd like to select a node (item) in the TreeView control to get its path information as a string. I'm finding it's not like selecting an item in a listbox.
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Oct 18, 2010
How to get length of a particular item, for example item no. 5, in a combo box?
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Mar 27, 2011
My program that I'm creating is a quiz creation tool, based for teachers to create quizzes and then use them to aid with quizzing their students.I've got the whole program working in that you can create quiz, play the quiz and then see how many questions were answers correctly and how many questions their were The problem I'm having is that I don't know how I can save multiple quizzes, for example you can create one quiz, that then saves as a .txt in debug however, when you then create another quiz and click the save file the old quiz details are sitting in the .txt
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Dim filename As String 'full file/path name for QuizRecords.txt
Dim index As Short 'loop control variable
[code]....
So what I'd like it to do is, when saved create another text file? Or another set of data questions, I have been looking through my Computing projects in Visual Basic . NET book as well as through online but I can't find anything that I understand as such.
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Feb 7, 2012
The List Box has three candidates and a record Button. Every time the record button is hit I need it to add those button clicks for each candidate that is selected in the List Box. My code keeps counting all the clicks no matter which candidate I am selecting in the List Box. How can I differentiate between each selected item in the List Box.
Private Sub exitButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles exitButton.Click
Me.Close()
End Sub
[code]....
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Aug 1, 2011
I got a Combobox with some items (item1-item7) to select and 54ish Buttons(sButton1-sButton54). Also an array(53) called Buttons. The array is filled with the items to select, like: Buttons(0) = "item 1, item 2" Everytime another item in the Combobox is selected, I'd like only some of the Buttons to change their Image. Therefore I got the array. If Item 1 is selected and Buttons(0) contains the item1 I'd like to change the Button1's image.edit: It works with changing the image of every Button:
sButton1.Image = My.Resources.image1
But I'd prefer to change all in one go (Loop) instead.
sButton(0) = "item1, item2, item3"
sButton(1) = "item2, item3"
sButton(2) = "item1, item3"
[code]....
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Nov 2, 2011
I am new to programming and i am working on a windows fom app. In this moment i have my windows form set with several controls that insert data into sql db. Now, what i need is this:
When the user select a employee name from my dropdownlist, i want the form automatically fill with the data inserted in the past to the tables db. Is like choosing the different profiles by selecting the name in the dropdownlist. I have many controls to fill, name, secondname, lastname, telmobil, address, etc.
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Oct 16, 2009
I know I can open the control panel item by using the following command
%windir%system32SystemPropertiesPerformance.exe.
However what I do not know is there a way to programmatically select the options on that control panel item? For example in a vb program I can launch that panel quietly have the program select "adjust for best performance" or select "let windows decide" Apply it and then close ?
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Jan 18, 2011
I have a Private Sub that I execute whenever a user clicks one of two or three things, and in it I create a new tab in my TabControl. Once the new tab has been created, I select it then add a formatted textbox to it. However, it is not selecting the new tab and therefore only adding the rich text box into the already selected tab (not displayed, of course, because it has a dock style of Fill.) Here iis my code to select the new tab and format / edit the rich text box:
Try
tabMain.SelectedTab = tabMain.TabPages.Item(intTabIndex) 'Select the new tab
AddHandler rtbCode.TextChanged, AddressOf DisplayUpdate 'Add TextChanged event to handle updates
[Code]....
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May 12, 2009
i'm doing a desktop application using VS2005 with MSSQL 2005. i have a problem with the where clause in the update statement while selecting the listbox item. this is the code for the listbox in load page:
[Code]....
and this is my update query in the delete button event handler: mySQL = "update Appointment set recordStatus = 'deleted'" how do i put in the where clause in when i have 4 columns in the listbox? so can i do this with listbox or have to do with datagridview?
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Jun 13, 2010
How can I do it so every time the user loads my application it will automatically (without prompt, or user selecting) upload all the files in a folder i select beforehand and add them into ListBox1
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Feb 12, 2010
I am trying to go to the next item in a listbox automatically when a song finishes in my media player. I've done this in my other player, but unfortunately have lost the source code.
I have this code
If MediaPlayer1.playState = WMPLib.WMPPlayState.wmppsStopped Then
ListBox1.SelectedItem = Me.ListBox1.SelectedItem + 1
MediaPlayer1.Ctlcontrols.play()
End If
But everywhere I put it, it just doesn't work.
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