I was just wondering if their was an easy way to create one handle for several controls. For instance, I have 20 buttons and I want them all to do the same thing when clicked. Instead of having 20 handles for each button.click, is there a way to create one handle that can cover them all, such as a grouping or something?
View 16 RepliesI have a form with a TabControl on it. On the first tab I have a DataGridView and I have a series of controls to represent six separate filters that can be applied to the data in the DataGridView. Each of these filters consists of 1. a ComboBox to display the columns in the DGV so the user can select one to filter on2. a ComboBox to contain the different filter conditions ("Equal to", "Greater Than", etc...)3. a TextBox to allow the user to enter the string to filter againstSo that's what's on the first tab. Tabs 2,3, and 4 are visually identical to tab 1 although they will hold different data and have different capabilities.
View 4 RepliesCan someone point me in the direction of a good tutorial on creating and building custom controls that can be added to the Toolbox?
View 6 RepliesI want to be able to select any control on the vb form at runtime. These controls will be added to theform on a click of a button. So essentially I want to dynamically be able to add and then select these controls at runtime. I would also like to make these controls dragable on the form.
View 1 RepliesI have a mouse click event for one of my controls. I then change the text of that control to something. I also have several other textboxes and want to do the same. How can this be done? I thought maybe this:-
Private Sub txtTitle_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles txtTitle.MouseClick, txtTitle2.MouseClick
End Sub
My problem is how do I determine which has triggered the event (title1 or title2).
If I have the following code, which adds combobox's to a tableControlPanel.How do I handle the index changing in the combobox?The second code shows what I am trying to do, except for multiple combobox's that are made on runtime.
[Code]...
I have a number of user control dynamically added to a page, and user interaction with these dynamically added user controls need to be handled by the control's parent. Is this what is referred to as "event bubbling"?How do I do that in VB?
View 3 RepliesI'm trying to add subs that will handle MouseOver events on textboxes that don't get created until after the program starts.
Each textbox gets created with a unique number attached to it like this...
AptTextBox0
AptTextBox1
AptTextBox2
etc...
Depending on how many are needed. But I never expect more than say... 15 at any given time.
Is it possible to handle MouseOver (or any events for that matter) if they don't exist until later.
I tried this but it didn't work....
I added this is the Designer code....
Friend WithEvents AptTextBox0 As System.Windows.Forms.TextBox
Friend WithEvents AptTextBox1 As System.Windows.Forms.TextBox
Friend WithEvents AptTextBox2 As System.Windows.Forms.TextBox
[Code]....
But it doesn't do anything. I don't get errors, but apparently it's still missing something to properly handle the events.
Handle EventArgs on Variable or Not Yet Created Controls
View 2 RepliesI have multiple user controls (the same one dynamically added to a form 4 times), and one class. I would like all of the user controls raise events in that one class. For example, if any of the user controls are clicked, I want it to send a string to the class to be processed and show a MsgBox "Control name was clicked"I am doing this as an exercise to reduce repeating the same code over and over directly in the control, and to avoid creating the class over and over to accompany each user control.
View 1 RepliesHow do you create a label which is'nt associated with a handle so that it displays the data when the form is loaded with clicking it etc?
View 1 RepliesIs there any limit to the no. of handles assigned to an routine. Well actually my form form has about 80 controls and when ever the user press the enter key, focus must be to the next control. so can I handle all the 80 keydown events in one routine, or is there an better way.
View 3 RepliesThe app Im working on is dunning on an embedded xp machine. It recieves input from the serial port from an industrial process, and then a backgroundworker class calculates and updates the single form GUI with the results from the process. Very simple.Now, the customer want to allow automatic download of log files by an USB memory. The process should work like this:
1)User plug in an usb memory
2)SHow a virtual keypad (touch screen) where the user enter a security code
3)If code ok, show a 3 choice screen, if not ok show error message and allow the user to try again.
4) If user choose the "export all" button, this choose form will close and i display another form with a progress bar that show how all files are copied to the usb memory. When this process is complete, I will display teh form that says "remove the usb memory and press ok to restart the application.
As you see here lots of forms are created and disposed based on user choices. My biggest issue here is that I have no clear design pattern to work from.For example.. should I have this "chain" in the main gui form, or should I let each form create the next form. For example on the "select action" form, when I press export, should this form create and show the "copy progress" form, or should all forms be created and destroyed from the main gui form?
Also, such an issue like with the password. I put it as a constant on the main form, to avoid "magic numbers" in the code. And then I ran into problem because the "keypad" form is created on another thread and I can't access the costant on the main form, so I got a cross thread exception.Everything starts when an USB memory is connected. And the OnConnected eventhandler is running on a different thread than the main UI thread. how to design this chain of window creation/deletion is greatly appreciated. I show all forms with the SHowDialog because I dont want the user to be able to close the form unless he/she presses a button. And not by accident press somewhere else.
I have a small databse program that reads a .csv or text file.
my code
Public Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click
OpenFileDialog1.InitialDirectory = "c:"
OpenFileDialog1.Filter = "CSV Files (*.csv)|*.csv|Text Files (*.txt)|*.txt"
Me.OpenFileDialog1.FileName = ""
[Code]...
i am trying to Catch a data mismatch, if the user happens to select a .csv or text file but they arent of the right type of data. Dim result As DialogResult = MessageBox.Show("Wrong Data Type", "Data Error", MessageBoxButtons.OK, MessageBoxIcon.Stop)If result = Windows.Forms.DialogResult.OK Then
(not sure what to put here)
End If
Catch
End Try
I want to make it so that if the user selects the wrong file, it stops executing shows the message box , the user is only given the option to hit "OK"then it starts the openfiledialog click event again or stops and the user can open the filedialog again It seems that even though the ex is caught the rest of the code will keep running and from what I can tell from the documentation thats by design?
I want to create CheckBox(Appearance->Button; FlatStyle->Flat) at runtime. After making Checked some of them, I need to identify by another button which CheckBoxes are checked. Below the Function to createCheckBox at runtime.
Dim i As Integer = 50
Public Function AddCheckBox(ByVal strName As String)
Dim chkNew As New CheckBox[code].....
how to identify(By another button) which CheckBoxes are checked after creating some CheckBoxes and making few of them Checked at runtime.
I have written a program that reads a 3rd party .txt file database. In one of the fields "City" the 3rd party adds a city abbreviation code. Example [code[The probelm is now the 3rd party has added an additional abbreviation Sacramento (Sac)(City)..They dont always have the addional abbreviation so I am trying to determine what is the best way to write a program that would handle the different situations.
View 10 RepliesI have searched other forums, google, etc. and have not find a solution. I am creating a VB.NET application using Visual Studio 2010. My application runs fine inside the IDE. Outside of the IDE, it crashes immediately with an OOM exception. I have compiled the program in both VS 2010 and VS2008. The outcome is always the same. I increased my Desktop heap to 12288 meg from 3072 meg thinking that was the issue, but the outcome is the case. Although the increase does improve my response in the IDE. The error is also being reported as related to mscorlib.dll; and my version is for 2.0 framework is 2.0.50727 and for 4.0 framework is 4.0.30319. I am running Windows XP/SP3.
View 13 Replies(I tried with this question but this code isolates the problem better. I have this code:
Public Shared Sub PopulateTextFields(ByRef stuffList As List(Of Stuff))
Dim aStuff As New Stuff
For Each aStuff In stuffList
DoStuff(aStuff)
Next
End Sub
[Code]...
I'm trying to code a program that can download multiple files at once (on different threads of course).I have created a custom listview component that will allow me to add a progressbar directly to it.What my real question is, how can i take a url given by the user from an input box and create a new webclient to handle the download asynchronously and also report the progress without disturbing all of the other downloads in progress?
View 10 RepliesI have a standard windows application called winap. I have a com component which acts as an api to the winap. I have a class in winap call classapi which has all the methods that the api calls and all works well. The problem is that one of the methods in my class api needs to get a handle on form elements in the main worker thread. Whenever I try to access an existing form I keep getting null because the for exists in the main worker thread and my api call is in a seperate thread.
[Code]...
Have a populated listview with check boxes. If the item is checked I want to send it to report for printing. This code is bypassed:
Code:
Private Sub GetSelectedItems()
If Not Me.ListView1.SelectedItems.Count = 0 Then
[code]....
Count is always = 0. This seems to work only if the item is double clicked. And then only one item is returned in the msgbox. MSDN says "The SelectedItems property will not contain any items if the property is accessed before the ListView handle is created, which typically occurs when ListView is initially loaded for display in the form. You can check to see if the handle is created with the IsHandleCreated property."
When I tried to check for the handle, an error said something about overloading. So I added this:
Code:
Public Overloads ReadOnly Property GetSelectdItems()
Get
If Not Me.ListView1.SelectedItems.Count = 0 Then
[code]....
Which does not help. How to find the items checked/create the needed handle?
i have installed visual studio 2005 in my computer i want to create a sql server 2005 file i saw a sql server 2005 option in my installed components i want to know how to create a sql server 2005 from my visual studio 2005 it is possible or not.
View 1 RepliesI am a student and i am making a windows application in vb.net 2005. My project requrement is to print form's specific area and also provide left, right, top and bottom margin. Itwill also print in multi page if it require. For that i used Microsoft Print
View 6 RepliesI am a student and i am making a windows application in vb.net 2005. My project requrement is to print form's specific area and also provide left, right, top and bottom margin. It will also print in multi page if it require. For
View 3 RepliesI have a group of controls dynamically added to a forms with a name like "OptionID_#" where the "#" is unique number.1st I need to check if these controls are checked/unchecked, but am having a difficult time even finding them to make that first check.I thought controls.find might work, but Controls.Find ("Option ID_" True) dues not seem to find my controls.2nd I need to get the "#" from each of those checked options.I think that Split(conControl.Name, "_") should work to get me two different parts one with the OptionID, and the other with the "#".Still stuck on the first part though of actuall locating the controls I need.
View 9 RepliesI have an application that has a main form and several sub forms, but it is not an mdi application. I am pulling data from various tables in an access database and loading into an dataset. In my module I have a sub that is processing the returned tables and is supposed to be setting controls values (radiobuttons and checkboxes checked values mainly) on the sub forms. The forms have not been called previously and when I do a .show() on them, the controls that were supposed to have been set are not, my question is why are they not setting?? Here is the code I am using to set my controls from the module:
If ds.Tables.Contains("FacilityReviewAnswers") = True _
AndAlso ds.Tables("FacilityReviewAnswers").Rows.Count > 0 Then
For Each c As DataColumn In ds.Tables("FacilityReviewAnswers").Columns
If c.ColumnName <> "SurveyID" Then
[Code]...
On my Staff Scheduling application I have everything working except for some conditional programming. What I was wondering was if it possible to export to a preformatted worksheet in excel. I found code on the web that allows me to export from the DGV, but it has no formatting.Examples:I set the DGV Column Headers to visible = false and use labels above the columns to show the weekday and date. So I need to use S,M,T,W,T,F,S as the column headers (4 sets) and the days date just below each week day. So I don't want the auto generated column headers names in the Excel fields.
View 23 RepliesTrying to create a set of controls that can be used repeatedly without copy and paste code, including a textbox, a set of radiobuttons and then another textbox. Having a major problem in that I can only get one radiobutton to show up.
vb.net
Public Class QuestionDisplay
Inherits Windows.Forms.GroupBox
[Code].....
What would be the best approach to create the following: A groupbox that contains several labels a groupbox with an array of 8 labels in it
Then the main form would have 4 of these groupboxs (object?) and I would need the ability to change the color and text of all the various labels within any of the groupboxes, using an index similar to what we could do with control arrays in VB6.
I would think an object would make the most sense but can you have control elements in an object and display them on the form?
I want to create controls in runtime and attach them to an already connected database..
the controls must vary e.g.Array of Strings can be used.
how to place these controls on a panel in a orderly fashion.