File I/O And Registry :: Saving For With Dynamic Controls
Sep 13, 2009
I'm working on a kind of database program. What it does is, after an user fills in a couple of textboxes and hits an "Add" button, it creates a series of textboxes, and places these in the same form. After that, and here's where I have the problem, I want to be able to save the form, saving not only what each dynamically added textbox says, but also it's location in the form.
Here's part of my work up to now:
Code:
Public Class Form3
Dim k As Integer = 1
Dim i As Integer = 0
Dim j As Integer = 0
Dim x As Integer = 8
Dim y As Integer = 40
[Code] .....
NOTE: Age, name, last name, tel and type are all the fields that the user has to fill in, they are textboxes.
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Jul 21, 2009
I have a VB 2003 project and I have saved dynamic settings in the app.config.exe file with success.I am using ColorDialog to change the color of textboxes. Everything works OK except I need to save the changes in the config file.I have success with saving changes for textbox.text but not colors.
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Aug 14, 2008
I require some help in saving and reading files in Line by Line format, How would I save to a specific line in the text file, or read a specific line?
[Code]...
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May 28, 2009
I currently have a class
Code:
Public Class Customer
Public Property AccountNumber() As String
Public Property PMDue() As String
[code]....
Account Class is initialized as new customer. To save the data from each property in the Account Class, I'm currently looping thru the properties each time Account obtains new data. I tried to simplify the process by the following line...
Code:
CustomerStreamToWrite.WriteLine(Account)
This does not work as written. I figured it would be much faster. It did not write out the property data. It saved "WindowsApplication1.Customer" Not exactly what I wanted. Is there a method to get it to save the properties in a written out style by just using the class name?
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May 8, 2011
i have created a dynamic tabpage and a dynamic tablelayoutpanel inside it then added dynamic textboxes and labels inside the tablelayoutpanel...the thing is , i am having a problem on how to access the value of those textboxes and labels and add them as new columns in the new table(tagpage) in mysql database, i can already create the table in the database but i cant add the new columns in it. heres the code for accessing the values of the labels and textboxes
error: NullReferenceException was unhandled....Object variable or With block variable not set.
sql = "alter table " & tbl_selected(counter) & " add " & frmMain.Controls("TLP_" & SecArrList_sp(counter2)).controls.item(SecArrList_sp(counter2) & "label" & counter).Text & " varchar(100) NULL;"
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Sep 17, 2010
I have a query about dynamically added controls to a form. I have a series of buttons which are created and added at run time. I have a two drop down lists and two buttons which are created at design time. Button 1 creates a series of buttons called "Test 1.x" based upon the selection of the two drop down lists. This works fine and am happy with the logic.However.... Button two should remove all the dynamically created buttons from the form.This does not happen. What does happen is that 50% of the buttons are removed starting with the first one. WHen checking the loop it only enters the loop half the amount of times that there are buttons. Very strange. When the loop is run repeatability it will remove all controls. Why will my logic not remove all the dynamically created controls at once? What is wrong with my logic?
I attach two code snippets and the .net file for your consideration.Button method which creates the dynamically created buttons from the two drop down lists and adds to form
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Count As Integer
Dim MaxHours As Integer
[code]....
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Jul 29, 2009
I am working on a project where I need to create dynamicly created text boxes (which works fine) and then save the values from those text boxes to a txt file.Essentially how the form works is their are a few static text boxes the user fills out and then presses a button to create a row of 7 other text boxes and they click the button for however many rows they need.Again this part work just fine, but its when I get to trying to save the values in those boxes that I run into trouble.I'm fairly new to vb.net and currently I only know how to save the static boxes using the WriteLine function, which unfortunetely doesn't work for the dynamic ones. [code]
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Jun 15, 2010
I'm trying to build a music player app. I want to have it set up so the user can choose your own background from picture files on your computer. The code I'm using to save the registry file is:
Private Sub MusicPlayerForm_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
My.Computer.Registry.SetValue _ (m_strKeyName, "BackgroundImage", Me.BackgroundImage)
End Sub
The file is saved and I can see it when I use the regedit. The problem I'm having is loading the file. Currently I have:
Private Sub MusicPlayerForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Timer1.Start()
LoadDefault()
[code]....
The error message I get is 'System.IO.FileNotFound Exception'. For some reason I don't think the files' getting read.
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Mar 9, 2012
I think I'm starting to wear out my welcome by posting so much one after another..but, I'm having so much fun with this..Like a kid in a candy store. one more thing then I'll give you fellows a break. I was trying to get the colors and fonts to go into the registry and have the program pull those settings back into the program when its opened up but i can't seem to get it right for some reason. I only included the one line in the Form1_Load and left what i had in the in the other. Obviously this code is incomplete, and not functional As Is. So how do I save the Font Size, and then Save the listview backColor and Forecolor in the reg, and retrieve those settings when the programs starts?
[Code]...
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Jan 21, 2009
Error is coming Registry Access is not allowed.While Opening a Key.
Code:
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
NewDelete("HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun", "Sonia")
End Sub
[CODE]...
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Jan 31, 2009
I've had a bit of a look around the net and on the forums but I've yet to find an answer to my question. I've got Visual Basic 2008 Express and I'm trying to write some registry entries, I can write strings fine just using
[Code]...
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Jun 22, 2012
I need to save created object into Windows Registry and after reopening application to read it? I know how to save and read string but this is complex object.
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Aug 8, 2011
For example, I clicked the Add Text box button, so it added 3 text boxes in the form (I used Dynamic text box so it can add multiple text box). When I input data to one of those 3 text boxes and then Save button has been clicked. It should checked whether the dynamic text boxes are empty or not. If there are empty text boxes, then saving data to db should not be continued and display a message telling the user that empty field(s) are invalid.
In the code below, it saves the data even if there are empty text boxes and I think because it is in the for loop, it checks the text boxes one by one and repeatedly displays the message box that I coded.
Here's the complete code:
Imports System.Data
Imports System.Data.SqlClient
Public Class Form3
[Code]....
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Mar 7, 2010
I have 10 labels named lbl1, lbl2, ... lbl10
I'd like to change their propriety (using a cicle) with the cicle index
for i as integer=1 to 10 step 1
lbl (i) = PROPRETY 'I know this is wrong but it's what I would do...
end for
I'm using a workaround, but I'm looking for a better way..
[Code]...
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Nov 5, 2011
I have a VB.Net WinForm Program. I dynamically create panels with controls.Each panel has:
2 Labels
1 DataGridView
1 Button
Everything works fine the first time I create the panels.
Everything gets created, and everything is functional.
If I have to re-create the form, I get rid of the existing panels (and their controls) with this code:
[Code]...
When I re-create the panels, I get the panels and all of their controls except Buttons.When I step through the debugger, I see the buttons being removed, and I see them being created, but they don't appear in the panel
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Aug 9, 2010
I am working on VB.NETPresent i am working on Dynamic Controls.As per below sending my Code ...... I was Created....First Step: i was Created CheckBox Controls Dynamically in the loop.Second Step: i was Created One more CheckBox Control name called 'AllProjects".
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
cn.ConnectionString = ("Provider=Microsoft.jet.OLEDB.4.0;Data
[code].....
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Oct 12, 2009
How would you add Dynamic controls to your form, from an array which size may vary depending on how many controls the user has selected and has been retrieved from a database?
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Jan 19, 2010
I am programmatically adding some custom user controls to a PlaceHolder which I have on a simple aspx page. All of the user controls Postback's work correctly except for one which has a Gridview on it.
For some reason any postback that gets fired from within this control, does not call the specified event on the first click, however all future clicks it will work fine. I have no idea why this is the case, but many solutions I have found, suggest adding an ID to the ascx User Control, however this doesn't work in my case.
I've taken a look at the source file for the page that gets generated before and after the first click, javascript used for calling the postback changes, i.e
Before first click: onclick="javascript:__doPostBack('tmpControlID$sgvPrimaryEmploymentHistory','Select$0')"
After first click:
[Code]....
Again, nothing overly complicated. The USERCONTROLNAME is just a const with the value "tmpControlID" in it.
The control that is giving me trouble is a little complicated, I was originally using a custom GridView control that we have created, but have removed it and replaced it with the standard asp one to see if the problem still occurs, and it does.
Any button, on control which fires off a postback will fail the first time, and all future click will work correctly. On the first click the Page_Load event will get called, but that is it.
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Mar 4, 2012
Previous in my app, I've created dynamic controls and and named them blah0, blah1, blah2 etc. There will be a different amount created each time the user runs the app.I'm now trying to delete all of the controls but doing something very wrong. I've got the following
dim checkboxes = Controls.OfType(Of CheckBox).AsQueryable()
dim sPrefix as string = "blah"
for each checknum as checkbox in checkboxes
[code]....
When I execute the above, it only gets rid of every second control and I have no idea why. If I swap the dispose with a msgbox, the msgbox appears every time as I'd expect. It would seem that disposing of a checkbox seems to somehow requery the number available?
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Jun 6, 2011
i have a form with many dynamic controls. i want to add an item to a listbox ( by the way, to find this listbox i'm using 'tag'. if someone have any other idea i'll be hope to hear but that's not the problem) in order to do so i use this
For Each ctl As Control In Me.Controls
If TypeOf ctl Is ListBox Then
ctl.items.add("i want to add this line")
[code]....
and items is not recognized and this eror massage apear: 'items' is not a member of 'System.Windows.Forms.Control'.
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Apr 13, 2009
i have two controls consider two text box, as i enter a value in one text box the other should also be updated with the same. I used handlers but the problem with that is only when i leave the control the other gets updated i need it to be dynamically updated.
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May 1, 2010
how i can program a dynamic controls(list view, datagrid, combo box, etc..)
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Aug 6, 2012
I am creating a page with an area name and an input box next to it, code below:
Dim SQLConnection As New Data.SqlClient.SqlConnection(System.Configuration.ConfigurationManager.AppSettings("sqlstr"))
Dim cmd As New SqlCommand
Dim LoadAreaReader As SqlDataReader
cmd.CommandText = "ListAreas"
[code]....
This works great, the problem I am having now it retreiving the details once Button1 is clicked. I got as far as this:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
For Each key As String In Request.Form.AllKeys
If key.Contains("txtPrompt-") Then
[code]....
But just need to display the id of the input box that has a value of more than 0. Am I close at all?
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Mar 16, 2012
I'm having problems removing dynamic controls.
Here is what I'm using:
CODE:
The first sub is for adding the (custom)control, the second sub is for removing the control.
The custom control is a picturebox with a checkbox in the upper-left hand corner, no big deal.
The problem is that when I click the delete command, it only deletes one ckPicture at a time, and allways the last one in the list. I'm also assuming it's doing the same thing in the list(of images). What should I do differently so that it will remove all controls that are checked?
I forgot to add the variables in my namespace.
CODE:
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Jun 27, 2012
I've volunteered for a simple webform survey for customers and I've stuck on creating dynamic controls/ lables for the questions.. The number of questions will vary so I'd hate to change this webform everytime.[code]....
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Mar 16, 2011
I have an Application that has a tab control on it. Depending what the end user clicks on, a new tab is created dynamically at runtime and I use a Template class to fill it with controls of what is needed for the type of tab being created. All works fine but where I have an issue is with the dynamic tooltip control. I added a tooltip to the main form and added code to access it in the Template Class. But I feel I have to rig it to get it to work and am looking for a more proper way to do it. I access the Tooltip1 on Form1 via Form1.components. However, "Components" in the Form1 designer code is declared Private and I change it to Public and it works fine but of course as I know when I make changes to the Design of Form1 it recreates the code and Chages the Componets back to Private. So I need a better way to access it or a better way to create Tooltips dynamically.
Code:
'---CreateTab Class--- a portion of code for example
CreateTab(ByRef tpNew As TabPage)
Dim btnSelect = New System.Windows.Forms.Button
[Code].....
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Jul 14, 2011
Currently, I am try to get the email addresses that have been saved or stored by the user of the computer. This isn't the emails that the user has sent or received, or the contacts he/she has in his address book. Just simply the email accounts that have been accessed from the computer.I know that there are some locations stored in the registry that have the email account. The email addresses that are used on the current computer. I just can't seem to find them on my computer.I am not sure if the registry is the only place to find it or if it stored on the web browser such as internet explorer or google chrome.
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Aug 27, 2008
I am writing an application that connects to a specific com port. This com port can change depending on how many physical ports are on the PC, and if other USB devices have installed com ports before this one.
I have the communication to the com port all working great, but I need to get the com port description not just the "COM#" which is all I currently get.
I found in the registry where the description is stored but am having trouble doing what I need.
In this key:
Code:
HKEY_LOCAL_MACHINESYSTEMControlSet001ControlClass{4D36E978-E325-11CE-BFC1-08002BE10318}
there is a varied number of sub keys. The are numbered 0000-NNNN depending on how many ports you have. Inside each of these keys, there are multiple values, although I am only interested in one or 2 of them.
My problem is, that I do not know how to get a list of the subkeys (the 0000-NNNN keys/folders) from the original key I posted. I have looked through a few registry tutorials, and I can view the default value in the listed key, but I could not find how to list the subkeys of the listed key.
Does anyone have any sample code they could share that shows how I can get a listing of subkeys, and then run through those subkeys checking for a specific value in one of the strings contained in the subkey?
I am using VB.net 2008 and Windows XP.
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Jun 10, 2012
Create a web browser with tabs and I want to add a "Open in a new Link" Button with a Custom Menu .
The problem is I'm trying to use a Dynamic Control(Webbrowser) created in a class from a local sub (A picture box) on the event click . But i get this error [code]....
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Jan 9, 2009
I am writing an application that requires button controls to be created at run time because the amoutn of controls created depends on data retrieved from a database.
I believe I am creating the control properly but I am not capturing the click event.
Code example:
Dim myButton As Button
myButton = New Button
myButton.id = "id"
[Code]....
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