I am doing something similar to the calulator in windows. My form has a key_up event that allows the user to type numbers. There is also number buttons they can click. Once a number button is clicked, it gains focus and the key_up no longer works.
I looked at windows caluclator and when you click a button there it does not gain focus and the keyboard keys continue to work. How can I get this behaviour?
I am making some sort of panic program where if any key is pressed while the person is using the process in the combobox, it will kill the event....
I.e lets say i am playing a game (or googling something) and I press control-alt
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".
[Code]....
I have a textbox on a form that when it loses focus it updates other text boxes on the form. But before it updates the other textboxes I check the input value in the textbox lostfocus event if it is undesired I return focus to the the textbox and alert the the user with a msgbox. However where my problem is, is that when the cancel button is clicked I don't care what the input in the textbox is because the changes are being canceled but if the value is undesired the it keeps returning focus to the textbox instead of canceling the changes. Is there a way to see what control was clicked on before or in the lost focus event? Can't seem to figure it out tried enter and leave events but no luck!
So for example something like this...
Code:
Private Sub TextBox1_LostFocus(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.LostFocus
If Control that was clicked <> btnCancel then
[Code].....
Is it possible to set focus on the keydown event so after the button control, sets the focus into the keydown? although says often control can have focus,.Putting a button and a keydown event on a form...
View 2 RepliesMy web user control is [code]...
The problem now is that the click event does not fire upon clicking at the button.
I have a user control (SomeUserControl), that I am using in a Main Window. I write my application entirely on SomeUserControl, and Main Window is hosting SomeUserControl and nothing else.
Right now I have a shutdown button (in SomeUserControl), that is supposed to close the Main Window. The reason for this is that I do not want anything from SomeUserControl to close the application itself, but to fire an event from SomeUserControl, and Main Window receives it, and Main Window will close the application instead of SomeUserControl.
How do I do it? I am not familiar with the concept of creating and handling custom events, so if someone could explain it in words and in code as an example, I will be very grateful to you!
Edit: Here's my code so far.
(in Window 2)
Public Event CloseApp As EventHandler
Private Sub CancelButton_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles CancelButton.Click
DialogResult = False
[Code]....
I want to close the application when I click cancel in Window 2, but I don't want to do it in such a way that Window 2 closes itself, but by sending some notification to Main Window, and Main Window closes the application.
I have a control that invoke as : Using frmAssemblies As New MaintainMenuItems.bundleDGV(Me, MaintainMenuItems.bundleDGV.formState.pricingEdits, APSite.xrefID)
View 9 RepliesMy main form is a tabbed control with 2 tabs. The first tab is has two listview controls which display information about the current machine. The second tab contains a treeview control and two listview controls. This tab recreates the device manager in windows. I created a Machine class to gather the information about the machine that I want to display to the user. When I call the Display() Method from my form's load event everything appears to be fine the first tab's information is displayed in the listview controls.
Here's the kicker, when I click to the device manager tab there's nothing there. The LoadTree() procedure never fires. This code works, I've seen my device tree display a thousand times in the past. When I comment out the call to Machine.Display() my device tree reappears no problem. The code compiles fine no errors. I know the problem has to be in my Machine class but I have no idea what could cause this kind of response. I've never seen a program compile clean and then refuse to fire a procedure call but not produce some kind of runtime error.
I am using VS2008, vb.net, Windows forms project.I have a combo box control on a tab control.The selected value of the combo box is bound to a binding source.The data source of the binding source is a typed dataset.I set the datasource of the binding source when a record is chosen in a data grid control.Since the combo box is bound to the binding source, this should set the selected value of the combo box, and fire the initial SelectedIndexChanged event.Therefore, I remove the SelectedIndexChanged event handler for the combo box before I set the datasource of the binding source, and add the handler again after the datasource is set.
View 2 RepliesI need a multiline TextBox which is always disabled, but it shouldn't paint itself in gray, but I want to keep its designer choosen color. I previously had the same requirement with an always-black Label (no multiline) and so I inherited from Label like:
Imports System.ComponentModel
Public Class LabelDisabled
Inherits Label
Sub New()
InitializeComponent()
Enabled = False
End Sub
[Code] .....
But this way, neither I can set the "real" Enabled property, I mean the backing field.
I am using visual studio 2005. i am using webBrowser control to automate third party website.My problem is SelectedIndexChanged event is not getting fired. I used the code.[code]This code is changing the value in combo box but it is not firing the selectedindexchanged event. If i manualy select the item then after selecting a item it shows different message. How should i do it programatically.
View 5 RepliesI recently came across the AsyncFileUpload control in the latest (3.0.40412) release of the ASP.Net Ajax Control Toolkit. There appears to be an issue when using it in a hidden control that is later revealed, such as a <div> tag with visible=false.
Example:
Page code -
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="act" %>
[Code].....
I have a breakpoint on the UploadedComplete event but it never fires. However, if you take the AsyncFileUpload control out of the <div>, making it visible at initial page render, the control works as expected.
So, is this a bug within the AsynchUploadControl, or am I not grasping a fundamental concept (which happens regularly)?
Why does constructor ORDER matter in VB.Net? I am building a .Net type library which is meant to wrap an underlying COM library completely so that the consumers of the API can pretend to use a nice .Net library with .Net collections and whatnot instead of a COM library.Currently most of my classes are just 1 to 1 wrappers built using Reflection and CodeDOM. These classes have an internal constructor which takes the underlying COM type as a parameter. The CodeDOM builds this as the first constructor to the class. Using these classes from C# proves to be no problem. All I need is a reference to the .Net library and all works good.The problems appear when I try using these classes from a VB.Net project. If the first constructor has a COM type as an argument, the VB.Net project requires the COM interop assembly as a reference. If the first constructor has no arguments or has only managed types all works good. My class library is written in C#.[code]
View 3 RepliesI have read this many times. Focus is a low-level method intended primarily for custom control authors. Instead, application programmers should use the Select method or the ActiveControl property for child controls, or the Activate method for forms. What exactly is the difference? Subnet Calculator / Planner Serial Port
View 12 RepliesHow can i get form2 to to load exactly center of form1 or a location within the form when i get form2 to show, no matter the location of form1.[code]...
View 10 RepliesI'm using this code to try and show how strong the password is but the panel is changing to DarkRed no matter what is in the TextBox1.What am I doing wrong?
Wrapped it in PHP tags because I think it makes it easier to read >.>
[Code]...
how to set a focus for a control in VB
View 3 RepliesI tried to used this but no luck[code]...
if the use click the radio button i want to focus on Hyperlink4
I have a "if This > That then" statement, that doesn't seem to work, as it triggers regardless that "This" is smaller than "that". Does it matter that these variables are marked as strings vs integers?
View 8 RepliesI have a grid view with a nested text box in it. I would like to turn view state off but the fact of the matter is when data is posted, the text boxes inside the gridview aren't available (there are no rows in the gridview on postback)I am using ASP.NET 2.0 so would this fall into control state, not view state?
Sample ASPX code of the gridview:
[Code]...
Control's information is not stored in the View State (for things like selected value and .text etc.)Control state, introduced in ASP.NET version 2.0, is similar to view state but functionally independent of view state. A page developer can disable view state for the page or for an individual control for performance. However, control state cannot be disabled. Control state is designed for storing a control's essential data (such as a pager control's page number) that must be available on postback to enable the control to function even when view state has been disabled.[URL]..
I am starting design of a program that needs to run no matter if the user is logged in to the PC or not. So I will be writing it as a VB.Net Service.
As I am not overly familiar with SQL Server Express, is it possible to connect to a local SQL Server Express Instance and access the database from a VB.Net Service while the user is not logged in to the PC?
from my main form i'm giving focus to a control dynamically to calling form for example i have 3 child form, child1, child2, child3 form main form before i call the form i give the focus to a control which is set on some condition
[Code]...
and when i call child1.controls(cntrlname).focus() it throws the error. any idea how i can give focus using above code to one of my control in groupbox.
I need to know how to set the focus to a specific tab on a multi-tab tab control.[code]each followed by a .Refresh, but the tab control stays on the same tab. Do I have to cycle thru the index to get back to the base tab on the form, or what?
View 1 RepliesI have to set focus on combobox control when F2 key is pressed on the key board.
View 2 RepliesI am using VB.Net 2005. The form contains many controls. When the tab or enter key in the keyboard is pressed I want the focus to move to the next control in the form in some order.
View 3 Repliesi have a window form which has text boxs, buttons and radio buttons.when the form is loaded i want to put the cursor focus to TextboxA. But what i got is it didn't go to textboxA although I call TextboxA.Focus() at Form_Load event.In my Form_Load event() i have:
1) assign a value to a global variable.
2) hide a panel
3) set this TextBoxA.focus.
What i found is if i didn't checked the radio control to True in Form design time, the focus is go to that place, textbox.If i set the radio checked = True in form design time, focus is go to this radio button although i set TextBoxA.focus in form load line end.In my radio_checkedchanged() event, I have:
1) clear all textbox and set the focus to textbox. ( i even tried remove the set textbox focus line in this radio event but it didn't work)
But i must at least set this rdo button checked = true to carry on.if i set true, focus get lost.My program is a simple user registration form. Here is the
vb.net
Private Sub rdoNew_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles rdoNew.CheckedChanged
If rdoNew.Checked Then
[code]....
Why isn't this working? The number shown on the label gets stuck at 1 no matter how many times I press the button. [code]
View 5 RepliesHow do I find out which control has focus in winforms?
View 4 Repliesi have few cotrols on form (text box, combo box, checkbox etc). Thru some condition i stored the name of the control in a variable.
for example
dim cntrlname as string
if x=1 then
cntrlname = 'txtCode'
[code]....
at some other place on form i want to use above variable to give the focus to control.