I"ve created a form with three comboboxes and a datagrid. I've connect the comboboxes to the database and they all work but when i try and fill the datagrid based on the final selection from the last commbobox but it will not populate the datagridview..
CODE:
I am developing a Windows application in Visual Studio 2005, V2.0 using VB.NET. I am coding part of an Emergency Response Information System. On my form, I have two combo boxes (cboBaseStationID and cboPriority). I am trying to populate the datagrid with records from my database based on what is selected in both comboboxes.
For the first combobox, the user selects a name so the datagrid must only show records with that name. For the second combobox, this is a little more complicated. There are four emergency priorities in the combobox that the user can choose - 1, 2, 3, 4. In the database, there are different response teams (to be dispatched to these emergencies) and each response team has a grade of either 1, 2 or 3. [Code]
this is a subset of a previously posted problem, I have narrowed down my issue and am reposting a question from this thread: [URL] I have apparently confused the compiler by renaming some comboboxes in Visual Basic .net express? (See relevant code below) I think the confusion is in who should handle what, with two routines named with variations of ComboBox1 and one handling the other ( it confuses me just trying to interpret it mentally):
[Code]...
I have a form with 4 comboboxes and a button. The first combobox is enabled, but the rest of the controls are disabled. When the form is opened I fill the first combobox (cbxMethod) with a datatable. When the user selects something in cbxMethod the next combobox (cbxStudy) will be filled and so on. When the last combobox (cbxAnalyte) has a selected value I want to enable the button and give it focus so the user can move forward with the program. I basically want to force the user to move from one combobox to the other, until all are filled.I am currently using the SelectionValueChange event, but this event only fires when the user changes the value with their mouse or hits the Enter key, not when the user hits the Tab key.
Public Class frmCalculatedAnalyte
Private cv_dt As New DataTable
Public Sub New()
[code]....
I created a filter for a datagrid using a combo box, but every time I select an item from the combo box and there is no data for that filter I get the following pop-up error during debugging:Index -1 does not have a value.Here is the code that I am using:
1 Private Sub RYAN3estimatesBindingSource_CurrentChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RYAN3estimatesBindingSource.CurrentChanged
[Code]...
I created a button in DatarGrid. Now I want to click that button and only when I click the button should the event be fired. Actually I want to Delete that particular row once the button is clicked. However, when I click the button, the Event: CellContentClick of the DataGrid gets fired. And that means if you click anywhere on the Datagrid, that even will be fired, and that makes no sense to put a Delete button. So I want to keep the Delete button and once the Delete button event gets fired, the record gets deleted.
View 3 Repliesunfortunately searching the web i cannot find a decent example that allows me to loop through a winform to make sure comboboxes items are selected.basically what i would like to do is check the form if the comboboxes have been selected if not then highlight them yellow and set the focus on them.
View 8 RepliesI have the following problem, a table "table1" contains 10000 telephone numbers, this table is source for 5 combo box contained in a form, I need that when I select the first tel N in the first combo, this number is not any more available for the combo 2, when I select the second number in the second combo, the first 2 numbers of the table 1 are not any more available for the combo 3 etc. Every record (in form) contains 5 combo. The Tel N selected into the combo are source for other table called "table2". I've try with all the type of query between table 1 and table 2, and use the result as source for the combo, I've try with IIf but this is works only for the first combo.
View 3 RepliesI'm using VB 2005 and have an Edit - Entry form with Textboxes and several Comboboxes. I populate the Comboboxes with Arraylists as shown below. I populate a datatable with the Employee data from my SQL Server. I assign the BindingSource1.Datasource to my Datatable then add Databindings to the ComboControls. The (Fields.STAFF_MGR_ID.ToString) is from an Enum. When all is complete my textbox fields Bind and move with the MoveNext.. no problem, but the comboboxes display nothing.
Dim Manager2 As New ArrayList
While dr.Read
With Manager2
.Add(New ListContents(dr(1).ToString, CInt(dr(0))))
[Code] .....
I need to select all the comboboxes on a form with a for each loop. I have about 19 comboboxes and I need to select each one. I tried to do
for each box as combobox in me.controls
But that gave me an error and i now tried this:
for each box as control in me.controls
if box.name.contains("ComboBox") then
...
end if
next
That selected only the comboboxes but the problem is i need to access some data that is specific to comboboxes (aka the selected item(s), if its blank) but those properties are not present since "box" is a control, not a combo box.
I have spent a long time trying to find a solution for the problem I am having with comboboxes within a child form. I'm sure this must be a Microsoft error and not something I'm doing wrong..The best way to explain the problem would be to tell you what I have done so far:
If you open a new Project in VB and add two Windows Forms. Form1 will be the parent. Form2 will be the child.On Form1 add 1 x panel(Form2 will open up within the panel so make sure the panel is big enough to fit Form2) and 1 x button. The only code needed for this form is:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
Now run the program and click button1 to open form2 (form2 should now open within panel1).
The comboboxes and textboxes lose some of there functions for example:
1. You cant set focus on combobox without hitting drop-down
2. You cant highlight text properly in either the combobox or textbox.
3. You cant set the cursor index position using your mouse in the combobox or text box.
Does anyone know a way around this?? Mainly for the combobox as I've got some functions working for the textbox.
I have a combobox on my main form and it lists geographical locations that the user creates. How do I make the combo-boxes on the sub forms match the one on the main form?
View 1 RepliesIs there a simple way to make all comboboxes on a form to be readonly upon form load?
Rather than doing:
ComboBox1.ReadOnly = True
Combobox2.ReadOnly = True
And so on...
I have created a form with three comboboxes. means
FirstNameComboBox
MiddleNameComboBox
LastNameComboBox
All fields are select ( name ) from a "CustomerName" table. "CustomerName" table is have more than ten thousand records. I am use three binding sources its worked great but it is very slow bcz three comboboxes are filled data on form loading time. I am using visual studio 2010 (visual basic).
If you want a instance of an object to be created when a form loads or another class is created, you have two options:
Public class example
private IAmAObject As IAmAObject
public sub new()
[CODE]...
Or like this:
public class example
private IAmAObject as new IAmAObject
public sub new()
[CODE]...
I always use the first one. It's more type work but I think it's neater. How about you people and is there any real difference between the two?
I placed a datagrid in my form which l retrive data from my sql. i am using oledb connection. if i run the form i can retrive the data but i am not getting the data in the grid at first ,there is a "+" sign, i have to clik that then it shows the table name and after clicking the table name i can view the data displays in the grid..
View 1 RepliesI have an application that dynamically creates winforms.
Dim NewS As New Form
Dim NewT as new Timer
NewT.Interval = 5000
[Code].....
I need to create text box at a run time.
I found the following VB NET code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim textbox1 As New TextBox
[Code].....
When this row GroupBox1.Controls.Add(textbox1) and GroupBox control are being deleted from Form, the TextBox isn't created on the Form after the event is fired.
I have 2 forms main_frm and copying_frm. In main_frm, there is a list view that is populated with file names. The user then clicks save and all the files in the list are copied to a folder that they choose using a folder browser dialog. When this happens, I do copying_frm.ShowDialog() to display the copying_frm. The copying_frm contains a progress bar and a cancel button. I can get the progress bar to indicate how much has been copied. But that freezes up the application. To get around this, I create a new thread (called copyingThread) that copies the files. When that thread runs though, it can't access the waitingList_lvw in main_frm. For example, in the function that the copyingThread executes, if I have this line of code: MsgBox(main_frm.waitingList_lvw.Items.Count.ToString()) the result is 0. Also, I don't get any errors and no files are copied. How do I access waitingList_lvw in main_frm from a thread called copyThread that was created in copying_frm?
View 6 RepliesBasically I have two forms - Form1 has a DataGrid on it (Infragistics) and in the double-click row event it creates an instance of the EditForm and passes along the UniqueId for editing. Once the user saves the changes (if they make changes) - I want the DataGrid on Form1 to refresh. Here is how I thought I could get this to work ... I create a public property called RefreshRequired as boolean. Before unloading the EditForm it sets this property to true. Then Unloads. This continues the code in Form1 (which showed the EditForm as modal) but RefreshRequired is still showing as False? Why isn't my EditForm able to set the property?
FORM 1
Private Sub grdList_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles grdList.DoubleClick
' TODO Ignore Double-Click Event when Right Mouse Button Triggers Event
[code]....
I have form A that has a datagrid on it, I want to be able to double click a row in form A and open form B to that record.
I know how to do that in VBA in Access 2007, but I am having trouble comprehending the procedure for VB 2010.
For Each FRM As Form In Application.OpenForms MsgBox(FRM.Name) Next only getting open form name... i want all form name used in project
View 4 RepliesI am using VB.NET 2010 I have a project, which has a Main Form.Out of this Main Form, I create/dispose over 100 other Forms (when the user clicks on to a menu).So, there are some design changes, which I want to made by code. - This Changes have to been written in to the Load Event of each form.Is there a possibility to get informed in the main form, when a new Windows is going to be created, and add the code by this routine?
View 6 Repliescreating single instance form in MDI Application. How to check whether form's instance created or not?
View 6 RepliesI have a form which when button1 is pressed creates and displays a new form. From this form a user has the choice yes or no buttons. Each button has its own handler and script it executes. If yes is clicked i want to run the script and then close both forms. I used me.close() and that only closes the orriginal form and leaves the dynamically created on open. If I place a call to form2.close() in the yes handler sub I get an error that it is not declared. How can i close this second form?
View 4 RepliesI created a DetailView of a DataTable in a Form. This also created a BindingNavigator and all of this works fine.However, one TextBox in the Form shows the LangaugeCode and I'd like to use my refLanguage DataTable to show the LanguageName instead. How do I go about doing that?
View 5 RepliesI am finding it a little difficult trying to find the syntax on how to move in this case a tree view at runtime, I have a Combo box that if let's say "Void"is selected hides a description text box, I need to move a Tree view containing a list of parameters to the same place on the page the text box once occupied
View 4 RepliesI need my program to open just one instance of each form, and if the person clicks again on the button that opens a form that is already showing, the form should only be brought to front (probably with the "bringtofront" method). How do I do this?I tried checking if the form "is nothing" before showing it, but if I close it and then try to open it again it doesn't work.
View 4 RepliesI have a VB.NET App that creates forms from a template.I am having problems getting them to communicate with each other.Is it possible to send data from one textbox in the first instance to the same textbox in another instance.[code]Lets say i put the name in the wrong window by mistake - is it possible to send that text to the correct form.Issue is all forms seem to be called FormNameWindow - and i can't reference them by potential form name.
View 3 RepliesI have a VB.NET App that creates forms from a template.I am having problems getting them to communicate with each other.Is it possible to send data from one textbox in the first instance to the same textbox in another instance.EG
Names By Letter.
Dim NewNameWindow As New FormNameWindow()
NewNameWindow .Text = "Starts With *"
NewNameWindow .Show()
Where * would be the letter you click on.Lets say i put the name in the wrong window by mistake - is it possible to send that text to the correct form.