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).
View 1 RepliesHere'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?
View 2 RepliesI 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"
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I am using combobox to populate values from a table, 'Suppliers'. I put this combobox in a form wherein the order details are filled up. This column 'Supplier' is a Foreign Key and set to NotNull in the order detail table. Selecting the first available entry on the combobox gives error 'SupplierID cant be Null' . Selecting the 2nd value is OK, first choosing 2nd and coming back to 1 is also OK. This error comes up when trying to update the database.Even with the first value, the combobox is having a text. I would like to know why the error.
View 5 RepliesHow 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.
View 7 RepliesMy 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.
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.
View 2 RepliesSay 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:
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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.
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
how to program by stating if the first item in the combo box is selected then
View 1 RepliesOur 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..
View 1 RepliesI 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()
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.
View 4 RepliesI'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."
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
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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.
I have used the command:
For Each Proc as process in process.getprocesses
Combobox1.Items.Add(Proc.MainWindowTitle)
to populate a combo box with the list of current process windows, however for every process that doesnt have a main window title there is a blank space, is there a way that I could tell it to not insert the item if it's mainwindowtitle field is blank?
Just started on vb.net
I have a combo box with "yes" and "no" with i select Yes i want the label2 to change the text to "yes" likewise with "no"
I've tried to code it in a logical way as possible but it just doesn't works except for the "wtf" so i think that overall my code is correct but the way i want to retrieve the selected item from combo box is wrong.
Public Class Form1
Dim aa As String
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
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i have a combobox containing countries name and their codes like INDIA:CNT001 then i have a textbox that store the code of country i.e CNT001(fetching from database) Now i want to match that code with the combobox code so that the combobox is set to that item when i click a button. i m using vb.net and sql server as database.
View 5 RepliesThe 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
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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.
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 ?
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
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I am working on a small concept but since i am a novice in .net i am not getting the concept.I have 2 controls on the page.1st is Text Box: User enters the int value and that value is checked from database. In database there are 3 fields. One for ID, second for int value and 3rd for country.If the text box value in database is associated with country US then it should show US in 2nd control ( can be text box or combo box) in UI. Else for anything else it should show London.
View 3 RepliesThe problem I have is I have made a program which you select a value from a combobox and it changes the value of a url for a picturebox and thus changes the picture, I also have a button which randomizes all of the comboboxes so I will get something unique, but every time the program loads, and I hit random, it chooses the same numbers in order. If you need an example, when I press random the first time I get the number 7 for my first combobox, so the selected index=7, every time I load the program and press random it picks 7 for that combobox.
View 4 RepliesI use a printcode in a Class, and a printcode by the Button in the Form.Olso i have a code for fill the ComboBox, with al printers.Is it possible to do a selecting in the ComboBox, with as results that the print go to that printer.
Class
Public Class formCapture
Private Shared img As Bitmap
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my program downloads into a combobox every item(line) that is in a text file located on a server.
Every line in the text file ends with "a)" or with "g)".
Now I just want to make 3 radio buttons:
- one that will allow the download in the combobox only the item ending with "g)"
- one that will allow the download in the combobox only the item ending with "a)"
- one that will allow the download in the combobox of both (I already know how to do).
How can I do so?
To download the entire list in the combobox I do:
Dim List As String = client.DownloadString("http://mywebsite.com/mytextfile.txt)Dim lines As String() = List.Split(New String() {ControlChars.CrLf}, StringSplitOptions.RemoveEmptyEntries)ComboBox1.Items.Clear()
ComboBox1.Items.AddRange(lines)
I am new to vb.net and I am using visual studio 2010. I have two comboboxes on a form, each combobox is set to DropDownList so that a list of items can show in the combobox, but no text is allowed to be entered.
For combobox A, if user chooses item 1, the list of combobox B should be updated accordingly. I think this is quite common on a lot of applications. But I do not know to implement it. I even do not know the keyword to search for the relevant property or event handler.
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:
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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?
how to retrieve data from SQL Database using SQL Connection by selecting the individual value in a ComboBox which the data in the ComboxBox is also retrieved from the SQL Database using DataBound. A 'Display' Button will be clicked to display the data in a TextBox, based on which value the user had selected.
Below is my current
Private Sub displayBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles displayBtn.Click
'Create Connection
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