Accessing TextBox - Use Delegates And Invoke To Change The Value Of A Textbox?
Nov 7, 2011
I am fairly new to VB .Net and have ran into an issue when working with multiple threads using BackgroundWorker.In the new thread that is created I need to access TextBox1.Text to know what the user's input was.For example:When the 'OK' button is clicked BackgroundWorker1.RunWorkerAsync starts a new Thread.
Private Sub OkButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OkButton.Click
'We cannot start more then one calculation at a single time
OkButton.Enabled = False[code]....
I know how to use Delegates and Invoke to change the value of a Textbox, but I cannot figure out how to simply access the text from a Textbox.
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Apr 22, 2010
well i want all my textbox's event- keypress should be called by using Delegate
The Function i need to preform on them is only Numeric
My code
Public Delegate Function mydelegate() As Char
Public Function key(ByVal e As System.Windows.Forms.KeyPressEventArgs) As Char
Dim ch As Char = e.KeyChar
[Code]....
The problem comes when i use this code it surely gonna restrict me entering the alpha characters but i m facing problem is i can enter only a single digit number
i.e when i try to enter 45 it's simpley don't expect it only value which it is accepting is [1],[2] what i want it should accept the value's in two digits,three digits and so on..
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Sep 4, 2010
I recently finish my Microsoft VB.net training and learning something about delegates. I have two delegates in a excel source to control a progressbar and a text box on the mainform
Public Delegate Sub ReportProgres(ByVal percent As Integer)
Public Delegate Sub ReportText(ByVal Mytxt As String)
I want to use these delegates in a second excel source also. It gives declared in the first excel file and two conflict errors in namespace windows application.
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Mar 18, 2010
anyone know how to invoke the KeyPress event ? This code shows what I would like to do, but it simply calls the eventhandler and does not insert the text into the text box, so is not what I want/need.
[Code]....
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Dec 13, 2011
how can I detect if press Enter in the Textbox Change event and not in Textbox Keypress?
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Jun 29, 2009
I want to make a function in VB 2008 with which u can make a textbox change some letters within the textbox when u click a button. So example: Textbox1 has got in it: url...Then when I click button 1, it has to change ....
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May 13, 2009
i'am trying to open the autocomplete-window from a textbox without typing chars into the box.Normaly the autocompletewindow opens only if you type in a character, but this means, you have to know the first char.Is there any way to open the autocompletewindow without the first character? For example at the mouseover event of the textbox?
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May 18, 2009
let me explain in more detail so you don't get the wrong idea of what I'm trying to accomplish.If I have a button object, say Button1, on my form and I select it with my mouse, it brings up another form or dialog. If in the text field property of Button1 I enter &Button1, the B will have an underscore under it and if I hold down the Alt key and press b, it too will invoke the other form or dialog. I would like to also have the capability to do that with a datepicker field or textbox field.
Right now, I can set up several buttons with Alt-keystroke combos that work by default, but it seems like I have to write some form of keystroke intercept routine and test for the conditions I'm looking for and force the focus to the datepicker or textbox. Am I missing something? Is there a better way to do this? Or is there actually a way of setting up a label on a textbox or datepicker object.
Kind of like when you're using MS Access and building a report, the fields have a leader that you can type a label in. That's what I'm looking to do. So if the label part of the datepicker field says Date: if I press and hold the Alt key and press d, it will invoke the datepicker field (aka open the calendar for selection).
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Sep 30, 2009
I need to know how can I update a textbox.txt content from SQL table.
Table name is -> Sch
Filed name is -> PCB (string)
txtbox.text = ????? (this needs to show sch.pcb content).
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Feb 20, 2012
I am new to VB and am having a little trouble with my class assignment. Basically it is supposed to take an invoice subtotal - find the discount percent and give the real total. I cant seem to get my class to access the textbox for user input and it just keeps returning 0's. This is a homework assignment as well... im not asking for the answer just some tips because i am truly at a loss and cannot figure this out
This is my code from the button click event:
[Code]...
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Sep 29, 2011
I'm using visual basic 2008. I am done coding the CRUD... but i want it to have confirmation first. Then, i tried using panel, it works. but, my interface looks not organize. Is it possible to access the values in the text boxes from the other form?
For example: the client's information text box are on the form1 and once add button is click, the confirmation box will pop out. and the pop out box is in the form2. Is it possible to access the form1 text boxes from the form2?
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Apr 16, 2011
im trying to access a richtextbox from another class and thread then the ui and i cant seem to get it working. I currently have the sub thats handling the the work inside of a public class and its a sharedsub, im going to be calling it from several different classes and threads but again i cant seem to get it working. the code looks like this. Public Class SharedSubs
[code]...
i would be calling sub using SharedSubs.Console("stringstring") when this is called from the ui thread it works fine but when its called from anyother thread or class its does nothing,ive confirmed it going thru this code but its not displaying anything in the textbox and its not thru an exception due to delegates either which i figured it would.
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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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Dec 2, 2009
whats wrong with my code?if i change the item from the combo box..the textbox not change or has an error?
conn = New MySqlConnection()
conn.ConnectionString = "server=localhost; user id=root; password=12345; database=gigzta; allow zero datetime=no"
strsql = "SELECT accNo FROM accinfo WHERE (completename LIKE '%" & ComboBox2.Text & "%')"[code].....
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Jan 8, 2010
Is it possible to have a Textbox on a form that when the user inputs data, ( during Runtime )that data remains in the Textbox for good and the Textbox then becomes read only ? Is it also possible to make it so that the CD with the programme on, is in the PC when the programme is being used. Perhaps writing the Textbox data back onto the CD ?
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Mar 16, 2010
I've got the following code:
[code]...
The problem is that, when I call the "SetStatusBarText" sub from another thread, InvokeRequired is True (as it should be), but then my threads stall on the Me.Invoke statement - pausing execution shows them all just sitting there, not actually invoking anything.
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Jan 10, 2010
I'm building an app that is a basic daytimer type of app. My problem is that I can't get the textbox(Textbox1) backcolor and text to change when I need it to. For instance, if there are events for January 12 and the user clicks on the Jan 12 link in the Calendar control, if there are any events in the SQL table for that day it should populate the appropriate times. The funny, or not so funny, thing is that I have another textbox named "TheEvent" that I can change the backcolor and text on with the code below and it works fine.[code]...
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Jul 23, 2009
How can I make a picturebox that can be like a Textbox. So the picturbox is the same but the user can input strings on it
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Dec 6, 2009
I am trying to figure out how to change the class name on a textbox from "WindowsForms10.EDIT.app.0.bf7d44" to something like "textbox1". Right now the textbox has no caption so i can not just use vbnullstring for the class since i have no caption for the textbox.
Is there any settings in VB.net 2008 that will allow me to change class names?
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Oct 28, 2011
I have a textbox that reads its date value from xml file , I need to convert the date from dd/MM/yyyy to MM/dd/yyyy here is the ode I wrote :
[Code]...
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Jun 21, 2010
i want to some change in textbox class , lick in got focus of textbox change color of text box and leave of text box change old color, i want to set Permanente code in text box property, after changing we give a new name to text box class and use this class as well we need.
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Nov 26, 2009
How to change size of textbox.i try to change it at file design but i can't change it.How to resize it ,i don't care char or string in textbox ,i care only size
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Mar 7, 2010
I am using Visual Basic 2008 I am trying to capitalize words in a text box. I am using the following code (which, in case you don't recognize it, came from an example which I modified):
Public Sub FuncKeysModule(ByVal value As Keys)
'Check what function key is in a pressed state, and then perform the corresponding action.
Select Case value
[code]....
In the application, I select a word in the textbox then hit F2. The text is pulled from the textbox, I manage to change the first letter to a capital letter BUT I cannot change the textbox.I already set the ReadOnly property of the textbox to False when I initialized the textbox. It looks like the Replace function does not work.
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Feb 24, 2010
I'm working on a project for school. One part of the assignment is to change the font of the value in a textbox, the font on a label, etc. Which I can do. However, I wanted to add a feature that restores the original values. I was having trouble knowing what to call that or how to access that info.
I'm using the FontDialog box. So I can have the user select a font and change whatever I let them. But I want to have a reset button or something that sets it back the way it was. How do I access that value?
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Oct 31, 2011
I am making a webbrowser in vb.net 2008 and I want to adjust the size of the address bar when the form resizes. I have buttons and seperators around it that adds up to 606 pixels wide. So how do I make the address bar resize to fit the toolstrip when the form resizes?
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May 7, 2012
The Textbox_TextChanged event fires when a key is pressed or when text is pasted while cursor is in a text box.
Is there an event that fires on Textbox1.text="NewText"? How do I detect this?My reason for doing this is I would like to reformat text property automatically on assignment rather than do something like textbox.text=myreformat("Newtext").I can put code in validating or validated event but then I'd have to force focus/lostfocus to trigger one of those events.
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Apr 4, 2009
I have a detail form that get filled in by values from a table adapter. When the "endedit" is called as part of the update routine, one of the fields is changed for no known reason.
How can I find and look at the actual code that "endedit" uses?
Or how can I regenerate the code?
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Feb 12, 2010
I'm studying chemistry and wanted to make a quick app for studying the periodic table. What I have is 36 text boxes. I have a structure that can hold each of the 36 element's info, and an array with 36 instances of the structure.
Example:
Dim Elements(37) As Element
Structure Element
Dim strSymbol As String
Dim strElementName As String
Dim strNumber As String
[Code] .....
When I mess with it, sometime the text boxes will fill in, but randomly and the comparison between the input text and the info stored in the data structure never compare correctly. 90% of the time the structure data is showing a null.
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Aug 17, 2010
how to change letters in TextBox example:
TextBox1.text="abcde fg" and a-->x b-->y c-->z f-->t after that must be TextBox1.text="xyzde tg"
i think that i need something like this
TextBox1.Text.Replace("a", "x")
TextBox1.Text.Replace("b", "y")
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Jun 8, 2011
How to change the format in a textbox?
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