I've been trying to fix this for a while now and have yet to find a solution that works, I want it so that when an item is added another of the same name cannot be added. Here's what I have
Dim i As Integer
For i = 0 To ComboBox1.Items.Count() - 1
If ComboBox1.Items.Item(i) = TextBox1.Text Then
'do nothing
Else
[Code]...
I'm trying to create a Combobox List and I created the following my first try:
Private Sub ComboBox1_DropButtonClick()
ComboBox1.List = Array("LI-3:comparing and contrasting two or more print sources based on
[code].....
I can't populate my combobox with ANYTHING I code, and I don't like the click and pull system. it compiles, no exceptions, but it still doesn't populate my combo... this is the code
[Code]...
I want to check if two combobox values are equal. The comboboxes are in a datagridview.I found you need to use datagridview_EditingControlShowing to add a handler to the comobo boxes for selectedindexchanged. I can do this with this code.
Code:
Private Sub dgridRegisters_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgridRegisters.EditingControlShowing
Dim combo As ComboBox = CType(e.Control, ComboBox)
[code]....
However, the message box comes up for every combobox in my datagrid when I change the index, not just the cmbPort2. I would like to have something like this...
If cmbPort1.selectedindex == cmbport2.selectedindex then
'do something
endif
..but it doesn't seem possible.
How I could go about checking a typed value in a combo to the values in the combo box. I am making a system to select lockerID and Supplier ID I want the user to be able to enter the value in the combo box as well as select the value form the list in the combo box. Here is the code I have been trying.
If cboStockID.Text = "" And cboStockID.Text <> cboStockID.Items.ToString Then
MsgBox("Please enter Stock ID")
Exit Sub
ElseIf cboSupplierID.Text = "" Then
MsgBox("Please Enter Supplier ID")
Exit Sub
End If
Can someone tell me why this code works exactley the opposite of the way I thought it should?
[code]...
I have a combobox (cbKeyWords). I want to make sure tbAddEdit.Text does not already exist before I save. To me I should be testing for a False result not True. But the above code, goes to the msgbox if findstringexact=false and saves the data if it's true.
why this code works exactley the opposite of the way I thought it should?
[Code]...
I have a combobox (cbKeyWords). I want to make sure tbAddEdit.Text does not already exist before I save. To me I should be testing for a False result not True. But the above code, goes to the msgbox if findstringexact=false and saves the data if it's true. Am I crazy or am I missing something? Shouldn't FindStringExact return false if it's not found?
Case: I have one ComboBox which i fill up by using DisplayMember, DataSource with DataTable.
[Code]....
When user key-in in ComboBox (not select from the list), I check with above all possible but still got nothing. According to my knowledge, .Contains(cboStudent.Text) should work. Right?
I out of idea to check this checking.
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.
[Code]...
I'm making a combobox on a form. I want the combobox to have a list of choices from a table in a db. The two columns are a String and a Date. I want the date column to only show the year. I'm hoping I have the code right as it is above, but I'm not positive I've done the whole date thing right.
I have a checkedlistbox with numbers in it and I'm trying to load a list of numbers from a database and check all of them (they should all be in the checkedlistbox).
I was trying to do this by loading all the values into a separate listbox using my own subroutine (I know that part works) and then finding the corresponding item on the checkedlistbox, like this:
Dim ItemName As String
For Each item In ListBox1.Items
ItemName = ListBox1.GetItemText(item)
If CheckedListBox1.Items.Contains(ItemName) = true Then
CheckedListBox1.SetItemChecked(CheckedListBox1.Items.IndexOf(ItemName), True)
End If
Next
End If
But this doesn't work: It never returns a match, even when the item is definitely on the list. How do I make this work?
I am working on a program that gathers test scores from the user in the form of a list box (array preferably). I need to be able to check the user's entries to validate they are between 0-100. I have tried using If statements with a messagebox.show() error message.When the user enters an invalid entry the error messagebox pops up but after selecting ok the program moves on to the next test score.
The GetTestScores procedure gathers the students test scores from the user
Sub GetTestScores(ByRef intTestScores() As Integer)
Dim intCounter As Integer = 0
[code].....
I am trying to check where an item in my array list exists in the database.The list would have already been created at an earlier stage.Now that some items may have been removed from the database, I wish to check the list against that database before removing the items, from the list, which are no longer in the database.The following code removes all items from the list rather than just each one which doesnt exist.[code]....
View 2 RepliesI want my program to check the pagerank of all string list items, and than add it do a listbox. Now this is my code to open a list and add it to a string list ( itemlist as list(of string)
Dim stream_reader As New IO.StreamReader(OpenFileDialog1.FileName)
Dim line As String
line = stream_reader.ReadLine()
Do While Not (line Is Nothing)
line = line.Trim()
[Code] .....
I'm using the DLL from this website: [URL]. The problem is that it only checks the first website and the other websites will be 0/10 automatically while they might be 3/10 or something else.
[code]Now how can I check if a certain employee is in the list? ie. I want to know if "John Smith" is in Employees. I see there is a .Contains method but I can't figure out how to use it on a ListIf Employees.Contains(???) Then (need to check for "John Smith" here)
View 21 RepliesI have an invoice that lists several items that one person has ordered. I want to take this invoice and every time I check the item it removes one of those from another list i created called item details. I added items to this list using the item collection in the listbox.. I have invoice one that has a pink sock ordered. when i clicked this box next to it I want my total pink socks of 12 to move down to 11... the detail page and the invoice are two separate pages.
View 1 Repliesif i pressed the RadioButton .. ENGLISH.. only Teacher's which teach English will be displayed in the listbox and so on. there is in access table called TEACHER which has all these information. i used the following code for displaying the TEACHERS' name in listbox and it worked pefectly but what i want is displaying according to radiobutton checked.
Sub conxn1()
Connection.Open()
Dim da As New OleDb.OleDbDataAdapter("select * from Teacher ", Connection)
[Code]....
Basically I have a form which has 2 drop downs. In the 1st drop down I am selecting City category. When the city is selected I want to update the 2nd drop down values in correspondence to 1st value choosen in 1st drop down. I have done like this,This adds the value in the 1st Drop Down:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim s As String = "connection String"
sqlconn = New SqlConnection(s)
[code]....
I've never really used the Check List Box in the past, however, for the recent program I am developing, I am using this control rather than individual check boxes scattered across the form.Anyway, I want to be able to program through code which items get checked in this checked list box. Specifically, I have a variable that contains the text of each check box that I want checked.With a normal check box, I can simply say:
Dim strNames As String
strNames = "John Doe, Mark Johnson, Mike Brown, Cindy Smith"
If strNames.ToString.Contains("Mike Brown") Then[code]....
Is there any better performance by checking for a true value like this:
[CODE]..............
Than like this:
[CODE]..............
I was useing VB a lot for some years ago and now I have started again..then, think I was useing VB3 or VB4 there was a property on ComboBox and listboxes that allows only to select the values in the Combox.. Not able to write own values..
View 1 RepliesI used to have the following code in a module that returned a string array to my main Form and used .addrange to put them into a combobox
Friend Function getPrimeContracts2() As String()
Dim i As Integer = 0
Dim count As Integer = 0
[code].....
Instead of a list box, I create a combobox and as I introduced the names she goesby recording and sharing this with other combobox from other forms?
View 1 RepliesHow can i get the integer value alone from the combobox list. For examle, if the item in the combobox is "ABC 01", i want to get the value "01" alone into my code for processing. How can i do it?
View 3 Replieshow to list the directories like (c:,d:) in combobox
View 2 RepliesI'm using VS2008, VB.Net and WinForms. I cannot get the combobox droplist to display the most recently added item unless I quit the app and restart. I've searched thru several forums for answers but cannot get any to work for me
Private Sub cboSpecialty1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles cboSpecialty1.KeyDown
Dim objCommand As SqlCommand = New SqlCommand
[code].....
I am trying to make it so when i choose a item in the combo box the list box is cleared i have tried these two codes and i cannot thing of any others but it does not work can someone help me? [Code]
View 1 RepliesThis is my first post so be gentle . I have tried to create form with combo. Combo has source in Access database. What I want is for combo to check user input, if not in list, prompt "Add new item to source table" and if "Yes" add new item (row) to source table. I have been working in Access and this is new t
View 4 RepliesI am absolate new to vb.net .can some one help me to write a query that will display list of tables in combobox.using the code bellow i can create table but i want to be able to add all the avilable table names in combobox.Imports System.Data.OleDb Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Cmd As OleDbCommand
Dim SQL As String
Dim objCmd As New OleDbCommand
[Code]...
i am making a safari booking system, and i have a combo box list(contains a list of hotels) how do display the prices of the hotels in a text box
View 1 Replies
