Combobox Index Change On Form Close?

Dec 16, 2010

I have a combo boxthat holds a list of values that are a custom object and when a value is selected a few text boxes are loaded with data. I use the SelectedIndexChanged Event. Works wonderfully.I noticed that this even is also called when a user clicks the 'x' to close the form. I just wanted to understand the logic behind that. I get that the technically index is changing since the cbobox value is being set to nothing, but to me that just seems a little inefficient.

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VS 2005 Combobox Selection Index Change?

Nov 17, 2009

I am using the following code to populate a picturebox at form event load

c
Me.PictureBox1.Image = Image.FromFile(String.Format("{0}{1}.jpg", Subject_Values.TextBox1.Text, Me.list1_MLStxt.Text))

[code].....

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Winforms - .net, Combobox.datasource Will Change Selected Index?

Mar 1, 2012

Let me try to describe my problems in the simplest way: I have combobox1 and combobox2. I hope to achieve two things: Combox1 is bound to list1 (a list of string). When a user selects an item in list1, list2 (a list of string) will be obtained from database and combobox is bound to list2.If user specifies text1 in combobox1 and text2 in combobox2, then these two values will be shown in the comboboxes regardless of the bound lists.

[Code]...

So the results of above code is that goal 1 is achieved, but goal 2 is never achieved. combobox1.selected index is always 0 and combobox2.selected index is always 0 too.

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How To Change Form Color Using ComboBox

Mar 14, 2009

Well I'm trying to change the form color using a combo box. It seems easy, so I tried it. I just get errors. This is what i'm trying to do:
Form1.BackColor = Color.Red
But it fails and gives errors.

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VS 2008 : Modal Form Hide Instead Of Close - Main Form Does Not Close

Mar 20, 2009

I have a main form that has a button with which a smaller form is shown. Think of the smaller form as the Find/Replace dialog in many applications, such as Notepad. It's important that the form is (what I believe is called) modal. What I mean is that it always stays on top of the main form. I ensure that by calling the Show method with "Me" as the owner argument. Whenever the small form loses focus it will not disappear into the background but stay visible (albeit out of focus). If you don't understand open up Notepad and have a look at the behavior of the Find/Replace dialog.

Here's my problem: instead of actually closing the form when the X is pressed, I want it to simply Hide itself, so its position and the state of any controls (checkboxes etc) is preserved automatically.To achieve this I simply cancel the FormClosing event and Hide it:

vb.net
Private Sub Form2_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing

[code]....

To show the form, I use the following (note the (Me) to make the main form the owner of the form; this ensures that it remains visible even when it is out of focus):

vb.net
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Form2.Show(Me)
End Sub

Now. When I run my project, and open the Form2 (small form), then hide it again (by 'closing' it), I can no longer close the main form (Form1)! It seems the main form cannot close when the small form still exists (albeit invisible)...?? When I don't use the Me argument in the Show method, I don't get the behavior I want. I know I can set the TopMost property to True but that will also cause it to become visible on top of all the other forms, even windows not part of my application.

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Change ComboBox Width To Accord To Form Resize?

May 14, 2010

when ever the form resizes I want my combobox (placed in a toolstrip) to increase or decrease in length to make sure it fits. Say it's about 500px before the combobox and I need about 200px after it. How would I do this? I've tried the various methods for the textbox, but I can't get it to work with the combobox.

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Change Datagridview Combobox Cell Style On Form Load?

Apr 23, 2012

at the moment i can change the datagridview combobox cell style using the cellvaluechanged event handler using the following code:
Private Sub DataGridView1_CellValueChanged(ByVal sender As Object, ByVal System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
If e.RowIndex <> Column1.Index Then

[code]...

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[2008] Notify Icon When The User Clicks The Close Button That It Doesn't Close The Form?

Jan 17, 2009

I have set up a notify icon for my form. I want to make it so that when the user clicks the close button that it doesn't close the form it just takes it to shows the notify icon. They can exit the program from the notify icon. Can someone tell me how to keep it running?

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.NET End Vs Form.Close() Vs Application.Exit Cleaner Way To Close One's App?

Feb 12, 2011

sometimes, when I use Form.close() when debugging my program, although the form is closed, the application is still running. I noticed this behaviour when using the msgbox function.

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VS 2008 When Close The Main Form All The Forms Close?

Aug 30, 2009

my web browser is my main form and it has a number of sub forms , how can i set it that when i close the main form my sub forms dont close ?

At the moment when i close the main form all the forms close

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Vb2010 Close Of The First Form Close The Application Even If A Second Form?

Feb 14, 2011

I try to transfer a vb6 application to vb2010. In the vb6 I start with a login panel that the user enter uid and password autenticate with the DBServer if ok show application main menu and close the login form. the order of the me.close() after the mainform.show() does not change, The application ends.

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Forms :: When Me.close() Doesn't Close Form

Mar 2, 2009

I have a situation where me.close() doesn't close the form. I have a form with a button with the code seen below. What happens when the button is clicked is the new form shows, but the original form(calling form) is still there. When I go into debug mode, I can see the me.close() execute, but nothing happens (calling form stays open). When I close the second form both forms close. If I comment out the call for the second form to open the first form closes without problem.

Private Sub cmdNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdNext.Click
Dim f As New frmOrder3

[Code].....

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Get A ComboBox To Remove The 6th String In The ComboBox Or An Index Of (5) But It Doesn't Remove It?

Feb 22, 2009

I'm trying to get a ComboBox to remove the 6th string in the ComboBox or an index of (5) but it doesn't remove it here is the function I am using:

if ComboBox1.items.count = 6 then
ComboBox1.Items.RemoveAt(5)
End If

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Change List Of Combobox A Based On Item Chosen From Combobox B?

Jun 17, 2011

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.

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Assign Index On Combobox/Listbox?

Jun 15, 2009

Trying to learn VB 2005. So my questions might tend to use the logic from VBA/VB6.

So, my question is, is it possible to assign indexes on the listbox/combobox? What I have is an ID and a Description from a table and would like to display it on listbox/combobox to allow user to choose from by looking for required description. When selected the ID will be used to search for other information related to this ID.

I manage to display the description but how to assign the IDs?

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Find Index Of Value Member In Combobox?

Aug 11, 2010

How should i find the index of the value member in an combobox?

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VS 2005 Set The Combobox Index Based On Value

Aug 15, 2010

How should i set the combobox selected index based on the "value". The following is the sample code. I am getting an error on the button click event.

[Code]...

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VS 2008 Combobox Index Changes Timer?

Jan 28, 2011

I have a comobox and a timer.

im trying to make it so the index of the combobox is "for example"

1
2
3
4
5

each number will change the timer
1 = 1000
2 = 2000
3 = 3000

and then the code will be something like If comobox1.text = "1" then timer1.interval = 1000
end if

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VS 2008 Combobox Selected Index?

May 16, 2010

im having a problem regard combobox selected index.the combobox wont change its index when i type a text that is the same with one of the items and pressing tab. when i check its selected index its -1. ill give an example to make it simple..combobox items = AB, AC, AD i entered "AB" by simply typing it not by selecting in the dropdown.its index is -1, how can i make the index the same with the items in the drop down?

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VS 2008 Getting The Index Value Of A Combobox In A DataGridView?

Sep 25, 2009

I have a column in a datagridview that is a combobox with 4 items in it. I can use this code to see the text value of the selected item:

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ComboBox Selected Index For Data Entry

Aug 21, 2010

I am using vb 2008, DataBound Controls and typed dataset. My form is having Group Box (initially hidden) and some text box, combobox controls for Data Entry, and the code is

bsSales.AddNew()
txtCreditDays.Text = 20
dtDueDate.Value = dtSalesDate.Value.AddDays(txtCreditDays.Text)
cboGodown.SelectedIndex = 0 '
Default
gBox.Visible = True
dtSalesDate.Focus()

I have set the combo box to select the 1st record in the list however, when the next Statement that is "gBox.Visible=True" is executed, the Combo Box is again set to -1 position. Why is it?

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ComboBox Selected Index Property As Integer?

May 19, 2012

I need to develop a function called SetComboBox that accepts the category(ies) in the ComboBox as a string and returns an integer indicating the index position of the category in the ComboBox. The function is supposed to set the category in the ComboBox Selected Index property to match the string category stored in a database for an inventory item.

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Getting The Index Number Of Selected ComboBox Item?

Feb 6, 2010

I have a combo box setup with 4 items, with indexes ranging from 0 to 3.

Later in my code, I need to do a certain event depending on what is selected. To do this I thought about comparing what the index of the selected combo box item is, because integer comparison is faster than strings, right?

how I can grab the index of the selected value?

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Set The Index Of A Combobox Column In A Datagrid View?

Jul 30, 2009

I'm trying to figure out how to set the index of a combobox column in a datagrid view when I load it from SQL Server. The combobox has a string in the text field and an index in the value field, and I want to set the selected index to match the value to an ID in the row from SQL. Not really sure how to bind it that way.

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Setting Selected Index On DataGridView Combobox?

Oct 13, 2008

I can't seem to set the selected index or selected value of a DataGridView combobox when loading data from a database. My DGV has two combobox columns which are bound to datatables. The DGV itself is not bound initially. After adding a row, I select a value from each combobox which then populates the rest of the cells in the row. I'm using the EditingControlShowing event to add an eventhandler to catch the SelectedIndexChange of the combo boxes. This all works as needed. My issue comes when populating the DGV with saved data, I need to add the rows and set the selected index and/or selected value of each combo box. I've searched through various forums and articles for the last week with no luck.

I'm using VS2008 sp1, .NET 3.5 sp1 and SQL 2005 sp2 Express.

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Cascading Combobox - When Change Cb1 - Change Cb2 And Click Save Button - Cb2 Seems To Be 'lost

Feb 15, 2012

I have two combobox in a form: Cb1 and Cb2

When I load the form, Cb1 and Cb2 are connected to a bindingsource.

When I change Cb1, the code (below) changes Cb2 to show only the items according to Cb1

This is working fine.

The problem is when I change Cb1 , change Cb2 and click the save button..... Cb2 seems to be 'lost'...

I'm using VS2008.

CODE:

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Change Textbox Depend On Selection Change In ComboBox Column Of Datagridview?

Dec 15, 2011

I have a DGV I am working on, and I have many columns.

For example I have Columns colcase(Combobox), colreportTime(Time)

the combox shows 4 cases {A,B,C,D}

what I need to do is if the user select "C"

the the colreporttime will show the time of this change unless the old value is C

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How To Close One Form In A Project And Note The Entire Project When Using Me.close() In Visual Studio 2008

Mar 22, 2010

I am really new to Visual Studio and VB and I am having trouble closing a single form:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Me.Close()
End Sub

When I use Me.close() associated with this button it closes the entire project and not just the single form can anyone.

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.net - Programmatically Close A ComboBox Drop Down?

Apr 15, 2011

In a Windows Form application (VB.NET) I have a combo box and under certain conditions, when the user opens the DropDown list, I want to display a warning message.All of this works well: In the DropDown event, I check the conditions and if required I display the warning message.The problem is that when the user clicks on Yes on the warning message, I move to another tab on the main form and the drop down list still shows even though I've moved away from the tab containing the combo box.I've searched quite a bit and tried to set DroppedDown to False, call OnDropDownClosed, etc but nothing worked.It seems that when I try to close the drop down list from within the DropDown event, it doesn't work.

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Assigning Indices (index Pl.) To Combobox Items Manually?

Jun 21, 2010

I have figured out how to populate the comboboxes for an app I'm making from a database this is not the actual code but is basically the way I'm populating them for i = 0 to maxrows - 1 cbobox.items.add(dataset.tables("datatablename").Rows(i).Item(x))next i need either to be able to manually assign an index value to each added item or at least figure out how vb.net manually assigns index values to these.

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