.net - Detect Text Changed On Textbox Whilst Ignoring Databindings
Feb 28, 2011
I have some textboxes bound to a bindingsource and bindingnavigator.
I want to detect when the values have changed and prompt the users to confrim if they want to update.
When the form is first initalised and when then binding navigator moves to the next record the text_changed event fires on textbox where I have a boolean to determine if things have changed.
Is there a way to set my boolean only when valid data changes have occured or a better way to detect if things have changed
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Nov 11, 2010
I'm having trouble using DataBindings in a Windows Form / User Control. For example: Create a windows form, place a single text-box on it & place two buttons on it. The code behind the form is:
Imports System.ComponentModel
Public Class Form1
Implements System.ComponentModel.INotifyPropertyChanged
Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
[Code] .....
If you type something into the text box & press Button1, you'll get a message box with the text of the property in it. If, however, you press Button2 (which sets the property in code) and then press Button1 again, you'll see that while the property was indeed set in the code, the text box doesn't reflect the change.
Updated the code to provide the implementation of INotifyPropertyChanged. This now works as desired.
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Feb 26, 2011
I want to detect when the user has changed the content of a Textbox.
The following does not work for me, because: When the user navigates through the database (using my navigation buttons), the textbox is also changed, but NOT by the user making input. I would only like to know when the user EDITED the Textbox.
Private Sub mskStudentNumber_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles mskStudentNumber.TextChanged
If Not Movement Then '' If not navigation
[Code]....
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Oct 3, 2009
How would I make the program ignore text? For example if I type in Notepad.exe the program will ignore .exe
how would I make the contents in a textbox NOT case sensative?
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Jun 4, 2011
Is there a way to check if the user has changed the value of a textbox?I try to acces a variable in one of my methods to compare against the value but I can not seem to be able to access it?
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Mar 16, 2009
I'm try to making a text box showing a date, this what i've done
[code]...
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Jun 29, 2010
I have a form that has several controls, most of them are textboxs. All controls are binded to a bindingsource. The controls that always have values, they are displayed correctly, but the others ones that have null values in the data source, the default null value doesn't show up. This problem it's driving me crazy... There must be something that i'm missing. Some of the code that i had used with no luck:
[Code]...
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Oct 28, 2010
'm developing multi user systems where for example I could have a form with a list of users on it. If a user on another system adds a user then I would ideally like for the new user to show up on my list reasonably soon. While that could be done by getting refreshing the list every couple of seconds I would prefer to be able to identify that a change has happened and then be able to decide what to do from there (whether that be actually refresh the list or inform the user that a change has happened and ask them what to do).
The only way that I can think of doing this is to store the information that was originally retrieved and then every x number of seconds requery the database and then compare the two sets of data, if there are differences then raise an event.
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Feb 20, 2011
I've finally cracked how to detect that Form1's size has changed?[code]Now I have another problem, my intention was to adjust the font sizes of some labels, buttons and textboxes to reflect the change in form1's size.I find that font size is Read only, so I thought OK then, I'll adjust the Bold: Wrong! bold is also Read only.Ideally I'd like to leave the bold on and adjust the character size.The controls all change size correctly within the minimum width and height restrictions of the form, but sadly, the larger some controls get their texts start to look like a pea on a drum.
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Jan 8, 2009
I used to use ADODC with VB6. Once I've set up databindings I can set a text box or other controls to link with a database's specific field by changing the Text property under Data > DataBindings. I want to change the field the text box links to at different times using code. How can I do this?
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Jul 18, 2012
I am trying to create an applicaiton that will verify that a large text file used far a CNC machince
has all of the operations in order (someone may have edited the file by mistake) I wish to bubble
sort the lines of the file while ignroing other lines. I really stuck on how to set up and handle
this program. Here is what I have thus far (just started).[code...]
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Jan 20, 2011
I'm Making a Simple syntax highlighter and I'm Doing the highlighting in the text Changed event of a RTB and for obvious reasons I can't re highlight the whole document each time someone presses a key so i highlight one line each time the text changes. But this creates a Problem. If someone pastes code into the RichTextBox It only highlights the last Line. So is there a way to get if the user typed the text in with his keyboard or pasted it from the clipboard in the text Changed event?
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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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Dec 16, 2011
Ok, I have been going around and around with this for hours (Searching, etc). This is what I want to do, I want to load data into a Text Box and if the user changes the text in the Text Box I want to be able to save the new text.
My problem in the TxtBox_TextChanged event the data contained in the txtNarrative Text box is the new data that the user typed in (<>ABCD) but in the btnSubmit_Click event the data contained in txtNarrative is the original value ABCD.
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="WorkBench_VBNet._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[Code]....
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Apr 8, 2009
I have the following save function shown below, when called some tables get updated. Before fields are updated specifically to TblOracleNos what I want to do is when the text in TxtOracleNo has been changed and the save function called a MsgBox pops saying "Oracle number has been changed".
Public Sub Save()
Dim conn As SqlConnection = GetDbConnection()
Dim query As String
[Code]......
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Dec 14, 2010
I have the following save function shown below, when called some tables get updated. Before fields are updated specifically to TblOracleNos what I want to do is when the text in TxtOracleNo has been changed and the save function called a MsgBox pops saying"Oracle number has been changed".
Public Sub Save()
Dim conn As SqlConnection = GetDbConnection()
Dim query As String
Dim cmd As New SqlCommand
[code]....
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Apr 5, 2010
I've never come across this before:I have a series of text boxes. The text of these boxes get set on page load. then I have a submit button that calls a sub to update the table with the new values (text) in the text box. The problem is it is keeping the original text not the text that is CURRENTLY in the textbox. Anyone come across this before? Or know how to get round it?
[Code]...
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Apr 8, 2009
I have the following save function shown below, when called some tables get updated. Before fields are updated specifically to TblOracleNos what I want to do is when the text in TxtOracleNo has been changed and the save function called a MsgBox pops saying "Oracle number has been changed".
Public Sub Save()
Dim conn As SqlConnection = GetDbConnection()
Dim query As String
Dim cmd As New SqlCommand
If TxtNumPats.Text >= "1" Then
[Code] .....
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Mar 3, 2009
I have a form that builds and populates dynamic text boxes from parsing a file. There is a "Last Name" text box that when populated, also labels a tab page with the name. After the form is populated, the user can change data as they desire but I was wondering how to update the tab page text when the user updates the last name text box? All the controls are built in code.
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Nov 18, 2011
I have a question, how to count how many times the text has changed in label.text ??
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Apr 18, 2010
Basically what im trying to do is have a "Set to Current Page" button.
Is there a way to retrieve the URL of the current selected tab's url if the
navigation textbox text was deleted.
Normally i would do:
Form1.TextBox.Text = My.Settings.Homepage
But what if the person accidently changed the url in the textbox? or deleted it completly?
How do you retrieve the url of the web page the person is on? and set it to their homepage?
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Jan 31, 2012
How do I check if the original value of a text box has been modified?
I have a few textbox controls on a form. When form loads; user enters data in these fields but later change his mind and modifies what was entered earlier. I need to know which textbox or txtboxes were modified.
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Feb 15, 2012
I have 1 Table Called "Menu" there are some textboxes and a combobox. I want to fill data in the Textbox called "Menu_Rate" on Selection of combobox selected item & coressponding rate of the Menu shoud be displayed in the textbox.
This is my Code
con.ConnectionString = "Data Source=localhost;Integrated Security=true;Initial Catalog=Restaurant"
cmd.CommandText = "select Menu_Rate from Menu where Menu_Name='" & cbMenu.SelectedItem & "'"
[Code].....
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Mar 20, 2011
In vb.net using Data Reader while selecting an value in combobox should display an selected value record from the database into textbox.
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Aug 15, 2011
I am writing a program that saves quotes for writers to an xml file. Well I save my data to the xml file, but when I go to load the document I get this exception thrown at runtime.
System.Xml.Xsl.XslLoadException was unhandled
LineNumber=2
LinePosition=1
[Code].....
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Nov 25, 2010
I am trying to recursively search through the entire computer, this includes: My Documents, Application Data, Windows Folder, Documents and Settings(Windows 7 misnomer/pointer?).This is for my own educational and academic purposes, I am just searching for an MD5 hash of an EICAR test file that I have made.
EDIT: This is on Windows 7 Currently. DISCLAIMER: This is not, nor ever will be an antivirus project, this is not a school assignment. This is purely for my own knowledge. this be done? With the following code, I get exceptions thrown regarding access to certain directorys (App Data, etc), even when I build and run as administrator.
[Code]...
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Mar 11, 2010
in my program it has a log in system already done by myself and once logged in you can do whatever i have coded in if you understand my meaning . what i want to add to it is a timer that can be edited that runs as a standby timer like with what a screen saver does and logs out after inactivity for a specified time now i have no idea where to stat with this so if some one could put me in the right direction or an example would be great.so i need it to start a timer once the mouse is not moving and no keyboard keys are being pressed and terminate the timer once keyboard keys are being pressed or mouse is being moved it's for an update that i am releasing on my publishers website for my program?
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May 5, 2012
I changed my Username on my computer from i.e. "xxxxxx x xxxxx" to "Dennis"
VB 2008 during a compile gave me the following error: Error reading icon 'C:Usersxxxxxx x xxxxxAppDataRoamingMicrosoftVBExpress9.0VSProjectApplication.ico' -- The system cannot find the path specified.
The file "VSProjectApplication.ico" is in 'C:UsersDennisAppDataRoamingMicrosoftVBExpress9.0'
Somewhere in the VB2008 "configuration" files I believe that I need to manually change the old path to the new path.
I found the old path in the ".suo" file. The ".suo" file is not a text file. How can I edit the .suo file, save it so that it will work?
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Jul 14, 2010
I'm trying to make the textbox field active when listbox selecteditems is change so I know I have to but something in the selecteditemchanged action of the listbox, but what?I tried:
Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
TextBox1.Enabled = True
End Sub
But it didn't work..
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Jan 31, 2011
I'm currently trying to write a football simulator but am having issues with the computer becoming unresponsive. There are long lines of code (several thousand lines) that are executed over and over as one run of the code is equivalent to one second of game time. While the game is setup to be like Football Manager where you watch the game live, there will also be cases where the entire game is simulated without you watching. When doing a full sim of a game, I just have a loop which executes the code block 7200 times (games go for two hour roughly).
At the moment this takes about a minute but even when I get it down to the desired 5-10 seconds or so, I dislike the fact that the computer becomes completely unresponsive during this time. In a round there are 9 games and you'll be simulating without watching 8 of them. You're looking at 1-2 minutes of simulation time or possibly more. I can't have a loading screen that long! How can I program the game so it runs these simulations yet the game still remains responsive? It'd be fine if the user could muck around in the menus and stuff while the simulation runs.
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