Forms :: Use The Focus Events Of The Combobox's To Determine?
Jan 7, 2010
I have two questions for anyone who can throw some idea's my way question 1:I am currently working on a control with three combo box's. This control will be nested on a form, and I want the on-board timer to track how long each control is active. I am trying to use the focus events of the combobox's to determine if the control is active so the program will know when the timer should be started and stopped. My problem is, for example, when the user causes the text property of the combo boxes to change, the folowing code runs:
[Code]...
As you can see, there are points in this sub-routine that can cause the focus to shift, as well as fire the text changed event. While this all happens faster than is really noticable, I would like to eliminate the extra cycles if at all possible. As I mentioned in question one, I am adding this control to a form, to be more clear I am adding multiple instances of this control to a single form, and I am trying to use the focus events to determine which of the controls within the form are active; however, when the form itself is no longer the active application, whether it is minimized, behind another application or otherwise, all of the timers stop. I want whichever control was active at the time that the form was deactivated, to continue as if nothing changed.
I am migrating my code from vb.net 1.1 framework to vb.net 3.5In my windows application, the base window has some buttons and events are written for the same.I have shortcuts defined for these buttons also, for example: ctrl+d, DEL (keyboard) etc.Now i open a property Grid form on top of my base window for a selected object.Even when the focus is on this property grid, i am noticing that my base window events are firing on pressing those shortcuts.
example:I select some text in my property grid and hit delete button from keyboard. The delete event that i have written for the selected object gets fired and the text is not deleting.I fail to understand why is it happening. It wasnt behaving like this in .net 1.1.In .net 1.1 it would delete the text and only when the focus is back on the base window, hitting Delete would call the event.How do i control such a behavior? Is there some property that i need to set for property grid in .net 3.5 to prevent base window events from firing till the time focus is on property grid form?
Is there a more efficient/easier way changing the backcolor of a control when it has focus and lost focus? Let's say I've got 10 text boxes. Right now I would have 20 different events...10 for Enter event and 10 for Leave event. Of course, entering would change the back color to "green" and leaving would change it back to "white".
I have two forms in an application. One is he background and then I show another keypad form called with the show() method (not showDialog) because I need to perform some validations on btn click.
The kepad has 10 buttons and an Enter Button. The problem is that the form keeps loosing focus (I checked this with a messagebox which keeps poping up once for focus=true and again for focus=false, it continuously keeps losing and gaining focus) so it does not process any keypress events untill i click somewhere on the form. I tried using me.focus() in form load event but to no avail. The forms TopMost property is also set to true.
I have a combobox sub-routine that is triggered by either a "SelectedIndexChanged" or "Leave" event How can I determine which of the two events triggered the sub-routine
A form's key events will fire when you press a key. Place a control on that form and it won't happen any more because that control has focus. There are exceptions to this however as you will see if you place just a h or v scrollbar on the form. The key event will fire because the scrollbars can't receive focus as is demonstrated by the following
Private Sub ScrollBar1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles VScrollBar1.GotFocus Debug.Print("Scroll GF") End Sub
[code]....
So I've made my own special scrollbar usercontrol and i can't figure out how to have it leave the key events alone. I'm pretty sure that the problem is that my usercontrol can receive focus at the moment.
I found that the way of doing this is "SetStyle(Windows.Forms.ControlStyles.Selectable, False)". I put that in the new event of my usercontrol and now it looks like this:
Public Sub New() ' This call is required by the designer. InitializeComponent()
DataGridView TIPs has TextBoxes and ComboBoxes in it and the data comes from an SQL table. I see how to get or set the cell values that come from the ComboBoxes using Item, but how do I access the actual ComboBox events and properties?
I have an application similar to calculator, with button from 0 to 9, Enter and Clear. I made it possible to use the buttons by clicking on them and also by using numpad, like shown below: Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
I want to make an auto log off feature, I want to detect if there is any user input, and if there isn't the user will be automatically logged off. So I want to know how to detect mouse wheel events when the form doesn't have focus.
I have googled high and low to find an answer to this but I must be searching wrong.I have an application which has a listview displaying some items that are stored in a SQL Compact database. I am using a second form to add new items to this list directly into the database.When the second form closes I want to call the sub in my first form to refresh the list from the database.
How can I get it to fire the form1 sub routine on the close event of form2
I'm trying to set the focus to a ComboBox on program startup.[code]...
The DropDownStyle is set to DropDown so the user can type text in the text field. At program start I want the this control to have focus with the cursor in it & ready to accept text. As it is now the user has to first click on the ComboBox to type in it. Setting its focus doesn't seem to do what I want.
I have tried this code select and set the focus to the combo Box but it doesnt work... Private Sub DataGridView1_CellBeginEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellCancelEventArgs) Handles dgvProduct.CellBeginEdit ComboBox1.Visible = True ComboBox1.Select() ComboBox1.Focus() ComboBox1.Text = DataGridView1.Item(0, DataGridView1.CurrentRow.Index).Value End Sub
I have a datagridview with a combobox column. The combobox column is populated from a collection. I begin to add data to the dgv, I select in the first row a value in the combobox and go to the second row. In the second row, when the combobox gets the focus, it appears 'V18', also the selected value before. Why? An on the other, when the combobox in the second row losts the focus, the combobox value is nothing. Why? Here are two images:
I have a combobox on my form. It's DropDownStyle is set to DropDownList. As soon as the control has focus and the list opens up, my mouse disappears. What is causing that?
When we click on drop down combobox control in our windows form, it shows the list automatically. But when we press tab and navigate to that control from keyboard it doesn't shows the list automatically. So in other to show the list automatically on receiving focus what should be done?
I have a combobox on an Excel worksheet that I can tab into, then pick my data (located on another worksheet) after activating the "arrow". But the tab or enter key does not allow me to navigate away from the cell after it is populated. The only action that allows the user to move to another cell is by mouse/click to another cell. I am trying to make navigation through though worksheet as user friendly as possible.I can't seem to find any sample code that will take the focus away from that cell using Tab or Enter.
I have no problem with ListBoxes created using the Data Validation method but I have to create a ComboBox control on the active worksheet in order to return the data chosen (in this case a code that corresponds to a description). If this was a Form I wouldn't have any problem as the properties would allow me to set that up, but this is essentially a spreadsheet I've inherited and the current users do not want to go to a Data Entry Form.
i need my application to determine if the desktop of the pc is locked or open.how would i go about doing this? i know that it is something to do with the registry but i dont know how to go about getting the values
In the context of data-bound combobox whose ValueMember and DisplayMember properties are appropriately set:Is there a difference between the SelectedIndexChanged and the SelecetedValueChanged events? Are they fired simultaneously when an item is selected from the drop-down list of the combo?
I added the colLocation to dgv."descirption" contains Unicode characters. I can see the comboBox correctly and choose the item.The problem is when the comboBox lost the focus, the value is changed to first item of the comboBox.
Updated:I found out that the ComboBox doesn't change the data when the DisplayMember is in English characters. It changes only when the DisplayMember is in Unicode chracter.
I can't seem to get input focus on a textbox when a tab page first comes up (I'm using Windows Forms, VB.NET 3.5). I have a textbox on a panel on a tab page, and I want the focus to be on the textbox when the tab page comes up. I want the user to be able to start typing immediately in the focused textbox without having to click on the textbox. I have tab stops set in the order I want and the textbox is the first tab stop. The tab stops work except that when the tab page comes up the focus is not on the textbox, i.e. the one that's first in the tab order.
In the Enter event handler of the tab page I call the Focus method of the text box, but it returns False and does nothing, no error messages. I know I can access the text box because at the same point in the code I can set the text of the text box.If it matters, the layout of the tab page is a little complicated:[URL]..I want to set the focus on TextBox1.
What's the best way to get the focus on the desired textbox? If setting focus is the best way, why is the textbox.Focus() method failing?
In VB6, Something.SetFocus sets the focus to that Something. No problems there - in .Net it's called .Focus.On another thread I was told (twice!) to use Something.Select in a particular scenario (which works fine by the way).
is it possible to have the same effect as a dialogue box, with form focus? eg, when using the open dialogue box, if you try to focus on another form within the app, it doesn't' let you and starts flashing. But when you switch to another app, it doesn't interfere.
I have 1 form with about 5 other forms added into it. How can I check which form the user is currently on. I have tried using gotfocus for the 5 forms within, but it doesn't work. is there another way of seeing when focus has changed within the form?
currently I have a Customer Master screen. Inside the screen, I have a button which call the Customer sub window.
When I call the sub window, I want the set the cursor at Textbox1.
The problem is, when I call the window for 1st time, the cursor stops at Textbox1. When I call the window for 2nd or 3rd time, the cursor stops at other textbox or buttons inside the sub window.
Seems like Textbox1.focus is not working.
'***************Calling sub window from main screen********** Private Sub BTN_CUSTOMER_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BTN_SEARCH.Click
I have a form from which I am visually representing data (from access database). I have set up a user log on a separate form (allows user to make comments as they scroll through the data and see any points of interest etc). The second form is linked via a textbox in terms of a common field in this case the field name is "Datetime".
What I want to do is be able to scroll through the data and make notes on the second form and add them to another table in the database. I have managed to do all the above but obviously loose focus of the second form when i scroll through the data on the first. Is there any way of being able to interact with both forms at the same time?
