Populate Combobox When Form Loads?
Feb 28, 2012
is what I have so far. I have a form that needs to load a file externally and populate the combobox. I can get that part if I use a button, but I don't want to use a button. I want it to populate when the form loads for the first time. The below code does not accomplish this, it doesn't even try to load it. I put break points in this code but it never breaks
Private Sub mortCalMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'sets listview values
[code]......
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Sep 28, 2011
I have a table in my database with 5 columns (ID1 to ID5) and just one row. I'm trying to bind a comboBox, to show ID1 through ID5 in the combobox when my form loads. I have a dataset and tableAdapter's made for this already. I just want to know how to bind a combobox to those ID values.
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Nov 30, 2011
I've got a combobox which loads the system colour list, the selected colour is stored in the registry (i've tried storing the index number value aswell as the colour name - how can i get the combobox to display the stored colour as the default colour when the form loads? It always defaults to the first item in the colour list I've tried
[Code]....
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Aug 5, 2011
I have a screen with a listview. I can populate the listview when the program loads. But when i add or delete data the listview is not updated. Here is part of my code
Sub RefreshScreen()
Try
dt = New DataTable
[Code].....
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Jan 27, 2011
I need to pull from an access database to populate a combobox. Then from there I need to have a second combo box populated depending on the selection in the first box. My thought of an example would be a website that is setup for selecting car make, modle,year...can that be done in VB?
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Dec 7, 2011
I use this code to populate info from Access DB to txtBox[code]...
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Jul 29, 2011
I have two ComboBoxes
<ComboBox Name="cmbMake" DisplayMemberPath="MakeName" SelectedValuePath="MakeID"/>
<ComboBox Name="cmbModel" DisplayMemberPath="ModelName"/>
I use LINQ-to-Entities to populate the cmbGroup ComboBox
Dim db as myDataEntity
cmbGroup.ItemsSource = db.Makes
How do I populate my second ComboBox (cmbModels) based on the selection of the first ComboBox (cmbMake) using XAML so that whatever I select in the first ComboBox automatically filters the ItemsSource in the second ComboBox?
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Aug 5, 2010
i have my main child form open. then i show the new form:
[Code]...
but when the form opens it flickers a lot. so i want move the new form behind the main form while it loads so the user does not see the flicker. once it is done loading i will set the form to topmost. how do i move the new form behind the main form?
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Jan 1, 2012
I currently have a form with two comboxes. The first cbo is being populated with a project number, which is being pulled from the first column of a spreadsheet. I now want the second cbo to read the first cbo and then find that project number on the spreadsheet; when it finds that project number, I then need it to copy data from the row the project number is on. I have converted to vb from vba. Below is the code I used in vba (which obviously does not work). I only need certain cells from the project row.
Dim proj_num, rng As Range
Dim data, i As Long, j As Long
With Sheet1
[code].....
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Jun 11, 2011
Within the program, there is a button that opens a file inside of a second form ( DocViewFrm ) and it works fine the first time around. Within this new window, there is a button that uses Me.Close() to close the window and return to the main window. Upon the attempt to open this second form a second time, the program crashes on the Me.DocViewFrm.Show() line. The error message reads:
An unhandled exception of type 'System.ObjectDisposedException' occurred in System.Windows.Forms.dll
Additional information: Cannot access a disposed object.
[code].....
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May 27, 2011
I have this code to add ToolStripMenuItems when my form loads.
Dim i As Integer = 0
Dim stanicastring As String
While i < ListBox1.Items.Count
[Code]....
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Oct 28, 2009
Ive created an application that reads plugins but I can't figure out a way of making a form thats housed in the plugin into an MDI for my existing application.[code]...
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Oct 1, 2008
I want to be able to make labels on the form change with user-entered variables (that they would do before this form appears) and so when this form appears, I want the variables to already be displayed in the labels without them having to press a button, or click on something.
[code]...
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Jul 23, 2009
I select first value from a combobox1 but combobox2 was not populated corresponding to value selected from first one. Again I select same value now combobox was populated
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May 22, 2010
[code] how do i apply that to all 30 textboxes when the form loads.
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Sep 1, 2011
i have a datagridview and a textbox when the form loads i want to enter text in the textbox then in column 1 in the grid whenever it is focused i want the text from the textbox1 to appear no matter how many records i enter until the user changes the text for the next lot of records,
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Sep 27, 2010
I have a table Called inventory, one of the columns is a checkbox based column called saved where it stores the checked state as the value 1 on the database. On a related form when i load it i want the datagridview to filter to only show the rows where saved has the value of 1.
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Apr 15, 2012
How do i go about creating an exception handler when i want to login to my form to access the rest of my forms. The username and password are linked to server.What if it doesnt connect to server? here is coding for me to login:
Private Sub btnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogin.Click
If (txtUName.Text = "-") Or (txtUName.Text = "0") Or (txtUName.Text = "") Or
[Code]....
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Jan 12, 2011
I wrote this application in VB2008 and it ran for three years without problems(It had one first chance error during that time but ran correctly). I started having problems at the first of this year with a textbox not showing the update for the date code correctly. So I thought that maybe some update to the system had changed and I might need to do some code changes to take into account for these updates.I first tried to convert it to 2010 but the conversion would not operate correctly even though the code showed to be correct.It would jump from one form to another in the middle of a if statement using debug to step through the code. the if statement would just test for a variable to be less than 2 and then be changing the text in a textbox. So I decided that It would take longer to correct the converted application then to just use VB2008.
So I went back to VB2008 and my XP to find out why the date code had quit working. This code had been working correctly for three years.I was thinking some of the code used had become outdated in some way, because a copy of the original source would not run in debug mode correctly. It showed the same problem of not updating the textbox. I stepped through debug and found that it was doing the same thing as the VB2010 version and jumping in the middle of the if statment. So I rewrote the code and used the format string command to build the date code in stead of the seerating out the date into 3 variables using a split statment.This works for the textbox problem and stoped the jumping to a different form. But since I have went back to the original code I have the first chance errors comming up.
I have several first chance exceptions being thrown from debug. This happens when I fisrt start the debug and I have put break points all through the applicatins to try and find the problem I have also enabled debug exceptions Common runtime thrown and it still gives the exceptions but no break point.I have option Strict on. There is no errors or warnings showing after a build. I have cleaned the solution and exausted all my methods of troubleshoooting this problem.The following is what I am recieving while in debug mode in the immediate window.
A first chance exception of type 'System.IndexOutOfRangeException' occurred in LABEL MAKER 2 Forms.exe
A first chance exception of type 'System.IndexOutOfRangeException' occurred in LABEL MAKER 2 Forms.exe
A first chance exception of type 'System.IndexOutOfRangeException' occurred in LABEL MAKER 2 Forms.exe
A first chance exception of type 'System.IndexOutOfRangeException' occurred in LABEL MAKER 2 Forms.exe
A first chance exception of type 'System.InvalidCastException' occurred in Microsoft.VisualBasic.dll
A first chance exception of type 'System.InvalidCastException' occurred in Microsoft.VisualBasic.dll
Now if I run this as a published application I get the same error as the first one on the above list and it gives a error window with continue, exit,and details, if continue is pressed it will allow me to continue and the application runs correctly.The details just say basicly the same as the error with no error number and that the error was in my application.exe. Nethier of these errors will give a break point so that I can find the problem. The problem does not appear to be in my code because this happens before the first form appears.
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Jun 14, 2010
I have a vb.net project in vs2008. When the project loads, one form is always immediately marked as changed before anything has been done to it. This didn't happen in earlier versions of the form. Nor does it happen with any other forms, classes, modules, etc. I have no idea why it is occurring but I am curious.
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Mar 19, 2012
I am using following code to raise UAC window. It works fine but my form that contains button to raise this window is shown twice. I mean if I put it in CopyFiile Button, when I click this button, it raises UAC windows, copies file, gives success message and then opens another instance of the same form that contains copyfile button.
Dim proc As New ProcessStartInfo
proc.UseShellExecute = True
proc.WorkingDirectory = Environment.CurrentDirectory
[code].....
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Jan 18, 2010
Public Sub ReadSample()
Me.Focus()
Do
Application.DoEvents()
[code]....
When i put:
Private Sub ThinkSec_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ReadSample()
End Sub
The application wont start.But when I put the sub to run when clicking button, it works.Why?I've tried all do until, while, for etc variations to get it correct but i have no success.
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Apr 20, 2010
I am trying to display an ID which is a primary key in my table by selecting the corresponding name in my table. the names have been saved in a combo box and depending on the name selected the textbox will display that Id. the code I have so far only gets the names from sql server but doesnt show the corresponding id in the textbox. I have been searching and cant find anything similar to this.
this is the code for combobox. i placed it in the formload
[Code]...
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Jun 21, 2010
I am trying to display an ID which is a primary key in my table by selecting the corresponding name in my table. the names have been saved in a combo box and depending on the name selected the textbox will display that Id. the code I have so far only gets the names from sql server but doesnt show the id in the textbox.
this is the code for combobox. i placed it in the formload
Public Sub RtnCmbVal()
Dim conn As SqlConnection
Dim str As String = "select ConsultantId, FullName from Derma_Consultants"
[Code].....
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Jan 12, 2010
I can understand since .ini files are pretty outdated, but I'll explain. I have a combo box, and inside the combobox I want it to display the names in a section of the .ini file. So say my .ini file contains the following:
[SECTION1]
Name = Billy
Lastname = Bob
Inside the combobox I wan't it to display the items "Name ", and "Lastname " only, not the section or the values.
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Jan 21, 2009
I want to populate a combo box but not using a database
e.g. combobox displays
red
white
blue
But want I want is if a person chooses red I want to pass back the number 1 value to a backend database. I'm able to populate a combo box with the colours but not sure how i 'grab' the value to pass back
Dim colours as string[] = new string[] { "red", "white", "blue" }
m_cmbColours.Items.AddRange(colours)
What I want is this
value Colour
1 red
2 white
3 blue
Combobox just displays the colours and when chosen in the combo box I grab the value corresponding to colour chosen.
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Dec 13, 2010
How do i populate my state combobox,such that when i select the appropriate country my combobox will automatically display the appropriate state?
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May 24, 2011
I want to have a combobox, but I have two fields from my Access table that I want to display in my Combobox. I want to show the entire row in the combobox. Do I need use an asterisk at the line for adding items to the combobox? [code]...
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Nov 16, 2007
I am a beginner in VB.Net. I have a table tblName; which consist of columns 'Name' and 'ID'. I want to populate the comboBox, where displaymember = 'Name' and ValueMember = 'ID'. In short, when a user selects a 'Name', return value should be the 'ID'. I can do it using DataAdapter. Another way of doing is; using a Listbox in parralel with the comboBox, which will be hidden, to save the 'ID' .
[Code]...
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Feb 26, 2012
I'm using Visual Basic 2010 and i need to populate 1 combobox with a txt file.
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