I'm new to vb.net and I have what probably is a simple question, but one that I am stuck on. I'm trying to add a single item to a ca combo box at run time. For example, a user selects a category from the first drop down box at run time, say "Admin", I want to add a single item to the combo box below it: Not applicable.
cboTest.Items.Clear()
cboTest.Items.Add("Not Applicable")
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?
i have imported names from database table into combobox..i want to add item"all" above all names..how can i just add one single item in combobox after populating it form database tabel.
View 1 RepliesI have an Access database with a Parts table. I'm using tableadapters in my project. A datagridview on my form is filled manually in code. One column of the DGV contains a columntype of combobox. I've got a bindingsource on my form whose source is the Parts tableadapter. The combobox column is tied to the bindingsource and is displaying fldDescription.
The part descriptions can be changed by the users, but the original part description is saved in another table that is used to fill the grid. If part "widget" gets changed to "widget, large" I can no longer display "widget" in the combobox of the grid. I need to know how to be able to add it to the bindingsource so I can display it in the combobox. I don't want it saved to the Parts table though.
I want to adding checked item from checkedlistbox to my combobox, but i have a little problem here.Combobox only show 1 item last checked.This is my sample code.
If CheckedListBox1.CheckedItems.Count <> 0 Then
For i As Integer = 0 To CheckedListBox1.CheckedItems.Count - 1
cbCheckedItem.Text = CheckedListBox1.CheckedItems(i).ToString
Next i
End If
how to write a program for a list box having 10 items in that just by a single click on one of the item it should be written on the button if a list is containing notepad than by clicking on the button it should open the notepad?
View 2 RepliesIn the form below you see how the initial selected item is the first record of the table.. these controls are bound.. I want to initially show "Select one" in the combo box or nothing at all and the other controls not to be bound until an actual item is selected in the combobox..
View 1 RepliesI'm currently trying to add all the sections of a specified .ini into a combobox.[code]Now that's my section in the .ini, but it's scrambled and placed into multiple lines. I just want it on a single line as said in the .ini.Does anyone have any idea how to get values between brackets "[hi]" and place the value between the brackets into the combobox items?
View 7 RepliesI need to pull the name of some forms in my project and add them to a combobox. How would this be achieved?
Here is a image of the directory layout.
[URL]
I need window1.xaml through window6.xaml to appear in the combobox on my admin form.
This seems to be the toughest thing I've had to search for. It seems there's not a good thread that clearly explains how to add items to a combo box that's bound to a SQL Server table (of course, I'm a newbie so I'd like a step-by-step on how to get it done).
View 5 RepliesI started a Windows app using all code for database connection and validation. However, it was always losing the formatting that I had set at run time. So I thought I would use the long tedious process of using all of the studios objects with minimum code.
I am now at the position where I am mostly happy with the layout and how this operates. However, I want to be able to add a non-databound value to a databound combo box. I have set the properties for the combo box in the combo box tasks.
Also, I want to add the ability for the user to update that table that is bound to this control, when a value is not in the list. I know that there is a NotInList event in Access, but I can not find it in VB.Net. I did get so far with updating from the combo box using the Leave event. However, when the database was updated the control could not find the ID in the Clients table to save to the Quotes table.
I need to catch the moment when i select a item in a combobox. what is the event?
View 2 RepliesSo am back again with dattagridview and comboboxes...sorry for the troubless.. Now let me come to my scenario aka problem..I have 2 dataviewgrids in my WINDOWS APPLICATION FORM (VB.net).The first grid populates some data from the SQLSERVER 2005 DB.When I click on any cell of the first grid, my second grid shows up and populates with the data corresponding to the cell which I have clicked in the grid 1.This is working perfect and so far so good.In the second grid I have 3 combobox columns and some textbox columns..The three combobox columns in this grid are also populated from the DB only usng datasets and datasource.In the first Combobox Column if I select one value, then the corresponding values are filled into the other textboxcolumns.This is also working good.The other 2 comboboxcolumns are also populated from database using different datasets..
Am about to add a master data ( i.e data into the first grid).it got added and after that a msgbox pops up sayn u must add data into the second grid as well.so the user is adding the data in the second grid.(all works except the new requirement).he added something into the first row by selecting the comboboxcolumns and also editing the other columns in the first row.(he havent saved this row.This will happen when he clicks the save button in the form not in the grid)he goes into the second row .Now here he should not see the item from the combobox1 which he has selected in row1.
I am creating the items in a combobox in my code behind. I am setting the display member and the value member. When the user makes a selection from the combo box, I need to get the value of the selected item. I have written some code, but when I step through it, it says that the selectedvalue is Nothing.
Here is the code where I am creating the items in the combo box:
Do While drReader.Read
cboTheater.Items.Add(drReader("TheaterDesc"))
cboTheater.ValueMember = CStr(drReader("TheaterID"))
cboTheater.DisplayMember = CStr(drReader("TheaterDesc"))
Loop
In the selected index change event for the combo box, I am doing the following:
Dim strTheater As String
strTheater = CStr(cboTheater.SelectedValue)
When I step thru the code, strTheater is Nothing
I have a combobox which is populated from a datatable.
I hae a list of values also and when one is selected i would like it to highlight the correct value in the combo box and have been trying to no avail.
my code is
Dim searchrow() As DataRow
Dim searchrow2() As DataRow
Dim cellvalue As String = dgvStockComps.Rows(e.RowIndex).Cells(1).Value
[Code]....
eveytime i sellect a value in my list nothing happejns to my combo box (i.e. it goes blank and it doesnt show the sleected item like i would like!)
I have a problem with a combobox. I have a form (with information about clients) with textboxes binded to a dataview. One of the columns in the dataview contains a number that tells me what kind of client it is. I don't my users want that my users have to fill in a number in a textbox, but I want them to choose a item from a combobox. De selected value should be the value that is actually saved in the database.
This is my
Dim cmd As New SqlCommand
Dim dr As SqlDataReader
VerbindingMaken()
cmd.Connection = cnnVraagbaak
cmd.CommandType = CommandType.StoredProcedure
[Code] .....
De Datasource is the information in my combobox. With Databindings I'm trying to bind it to my dataset (or view, that doesn't work either) with clients. Every time I get a NullReferenceExeption. The moment I remove the line cbo.DataSource = dsRelatie.Tables("Relatiesoort"), I don't get an error, but it doesn't work either.
That dataset is filled (I've checked) and also the derived view. The column Relatiesoort exists. What do I have to do to make it possible for my users to choose an item from a combobox and save the selected value to the underlying dataset?
I have been creating a call management application and I am having a problem with something that I have spent weeks on trying to get working and nothing I try is working for me. My application is an MDI application written in VB.NET 2005 Professional, using .NET Framework 2.0. It uses a back end database using Microsoft SQL Server 2005.When the MDI application launches, a form is displayed to the end user asking for phone number (MaskedTextBox) and a partner name. The partner names are within a ComboBox.
When the end user types in the phone number and selects a value from within the ComboBox, s/he clicks on the start button. This then opens a second form. The phone number from the MaskedTextBox is to default in a second MaskedTextBox (this I am able to get working without issue.) The partner name selected from the ComboBox is to default on the second ComboBox. This is the part where I have been working on it for weeks and not able to get it to function.
The second form has many ComboBoxes, all of which pull down items from a particular table within the database. Some of them are editable and some are not. The ones that are editable are also auto complete Suggest/Append on the ListItems.I wrote a sub to handle the population of these ComboBoxes and also to handle if they are editable or not. All of this is working. However, my main issue is that I can't get the value on the second form to default to what ever was selected on the first form. I do not get any errors but regardless of what I do, the second form always stays as the first item in the list regardless.
The code I am using is as follows:
<CLSCompliant(True)> Public Sub PopulateDropDownListFromDB(ByVal cboName As Elegant.Ui.ComboBox, _
ByVal TableName As String, ByVal ColumnName As String, _
ByVal UseAutoComplete As Boolean, _
ByVal UseSQLDistinct As Boolean)
[code]....
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
[Code].....
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 Repliesmy 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 want to scroll with my mousewheel from first item back to last item and scroll then scroll more back.to scroll up from last to first i have with the folowing code but how to do it backward i dont know.
Public Class Form1
Dim i As Integer
Private Sub ComboBox1_MouseWheel(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ComboBox1.MouseWheel Try If ComboBox1.SelectedIndex = ComboBox1.Items.Count - 1 And e.Delta = -120
[code]....
I have the following VB.NET code to set and read objects in cache on a per user basis (i.e. a bit like session)
Public Shared Sub CacheSet(ByVal Key As String, ByVal Value As Object)
Dim userID As String = HttpContext.Current.User.Identity.Name
HttpContext.Current.Cache(Key & "_" & userID) = Value
End Sub
[Code]....
I use these functions to hold user data that I don't want to access the DB for all the time. However, when the data is updated, I want the cached item to be removed so it get created again.
How do I make an Item I set disappear or set it to NOTHING or NULL?
My form contains a combobox which contains several usernames which are bound to my database.I've added a checkbox to the form which will be used to select the default username from the list.
View 8 RepliesHow can you color a single item in a windows datagrid (Windows datagrid 2.0 for Visual Studio 2005)? I tried the overrides paint function but it is very memory intensive for it hits the function each time you move from one cell to another.
View 3 RepliesI have 3 columns in my database (book title, book author, date added). for example Karen Harper has 5 books in my database and Lisa Jackson has 3. I will enter the date added in a textbox (for example 01-15-2011 since all was added on that date) and once I click "show book author's name" my crystal report will display Karen Harper 5 times and Lisa Jackson displays 3.
View 2 RepliesI have a parent child collection objects and was wondering how to get a single item from the child collection using Linq
[Code]...
I am developing a new project for my daily office use using access database with vb 2005.
In this project I have one bounded datagridview and it is ready to use.
I want to alter a particular field value in the datagridview regularly. so whenever I click the rowheader that particular field should be editable with a combobox with some value, after selection of the value and leaving that particular cell it should be updated with the appropriate record in the database.
the code display 2 colunms in one combo box from a table. i have table with 2 columns account_type and account_name. the account_type is an abbreviation(codes) which would be stored in a new table when selected. I want the code when the combo is click, would display the code-account_type and account_name in the same combo box.
Private Sub cboAccount_type_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboAccount_type.SelectedIndexChanged
Dim cn As New SqlConnection(ConnectionString)
Dim query As String = "Select Concat(Account_type, ' - ', Account_Name) As AccountDesc, Account_type from Accounts"
[code]....
Can you set a condition inside the string.format parameter.So if i have
string.format("{0}" , if x = 7 then return "SEVEN" else return "ZERO")
Is there a way of doing this?
