Wpf - Checkboxes Not Updating As Expected?
Jun 18, 2009
I have a listbox bound to a list of business objects. The items in the listbox are formatted using an itemtemplate. The itemtemplate includes a checkbox bound to a boolean property of the business object. When I spin up the app, the bool prop on the object in the list is changed when I click the checkbox. so far, so good.
The dialog has "select all" and "clear all" buttons. When I click on of these buttons, the properties on the objects are changed but the checkbox does not update.
The code in the select all click event is. . .
For Each x As BusObj In _BusObjList
x.BlockIsInserted = True
Next
I can step through the code and watch the object properties change but the checkbox does not update.
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May 20, 2011
I have a program that has checkboxes on tabpage1 and tabpage2. On the form is a StatusStrip1 with labels that have images. All labels are initially hidden.As I navigate the database, I want the the checkboxes that are checked to make their respective StatusStripLabel visible. I have tried to do this using the checkbox_changed like so:
If Pregnancy.Checked = True Then
PregnancyStatusLabel.Visible = True
Else[code]....
This works well for the checkboxes on the first tabpage but I have to click on tabpage2 before those checkboxes will display their StatusStripLables.How can I get them to all display without having to click on tabpage2 first?
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Dec 9, 2010
How to count the total no. of asp.net checkboxes, checkboxes checked, no. of checkboxes remain unchecked in webform using vb.net ?I m using Visual studio 2008 with vb as a language ..I my webform i have 10 checkboxes...i wanna count total no. of checkboxes in webform in textboxes1 total no. of checkboxes checked in webform in textbox2 total no. of checkboxes remain unchecked in webform in textbox3?
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Oct 26, 2010
Does anyone know what is wrong with this IF Statement? I'm getting the errors "Expression Expected" and "End of Statement Expected".If DropDownList1.SelectedValue = "Educational Sponsoring" Or "Grants" Or "Product Training" Or "Centres of Excellence" Then
[Code]...
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Jan 25, 2012
I have a webpage with a form that is used to edit some object. This object contains a Collection of other objects defined like this: Public Overridable Property Employees As List(Of Employee)
On a form I can delete an employee, add a new one or modify existing one. When I click save new values are sent to the server. On a server I check if the user exists. If exists then I modify its values, if it does not exist then I add it. All employees that exist on the server and were not sent are marked as deleted (State changed to EntityState.Deleted). I try to use the following code (dbCollection = database entities, newCollection = collection sent from the form):
[Code]...
This code does not work, because changing to EntityState.Deleted removes the object from collection, and for each loop breaks, since the collection is modified...I know that I can overcome this problem by using a for loop or adding objects to delete to some other list first, but I hope maybe there is a pattern that would make my code nicer.
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Apr 24, 2009
I keep getting this error in my code: " end of statement expected".[code]Please use code tags when posting your code.
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Oct 12, 2011
Imports System
Imports System.IO
Imports System.Linq
[Code]....
I am setting the DataSource of the LIstView as Photos.ToArray() in the code behind..but still i get the error.. "Select DataSource for ListView"
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Jan 19, 2011
I am currently working on VB. I am using Visual Studio 2008.
The piece of code below is a console application which builds without any error.
Imports System.Net
Module Module1
Public Sub Main()
[Code]....
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Dec 6, 2011
Protected ButtonsClass(count).ButtonsArray = CtrlButton
Where
ButtonsClass As Class
ButtonsArray As Button
CtrlButton As Control
count As Integer
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Sep 8, 2010
I have a statement 'ptr.Line((xmin, ymin) - (xmax, ymax), B)' which was originally coded in VB 6.0. Could anyone tell me why this code is now throwing an error in VB.NET?
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Apr 9, 2009
I have an Excel worksheet with a Source Cell and a Target Cell.Via GDI API functions, I draw a temporary gradient fill over the source cell which happens to be cell "D6"then, I make a transparent copy of the temp gradient fill drawn over the source cell and place the copy (ie the transparent gradient fill) over the target cell which happens to be cell "D9".
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May 27, 2011
I want to fetch data from a database table modify it and update it without being dependent on the database provider and the database structure, because it will be part of a library.My first attempt was as follows:
'factory defined somewhere else as DbProviderFactory
'connection is a working DbConnection
Dim selectcmd As DbCommand = connection.CreateCommand()[code]....
it did not work. After further investigation I figured out that the Commands the CommandBuilder generated were useless, because it inserted ? instead of @param1 for all Parameters. It generated something like INSERT INTO tbl1 (field1, field2, field3) VALUES (?, ?, ?) for the InsertCommand.I would really like to use the CommandBuilder, because it is simple and I don't have something complicated like JOINS.
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Mar 28, 2011
why the Output window does not print the "xxxxx" part of the string? Looks like I'm missing some basic understanding about something...?
I'm sending string messages over TcpClient, and when building the strings, I don't add any special characters on the sender side, and neither on the receiver side.
[URL]
EDIT:
I'm building my strings at the sender side like this:
Private Sub SendData(ByVal stringArray As String())
SendData(GetMessageString(stringArray))
End Sub
Public Function GetMessageString(ByVal array As String()) As String
[Code]....
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Jun 21, 2012
this code always return '0' i don't know why
Dim cur_month = DatePart(DateInterval.Month, Now).ToString()
Dim cur_date As String = "01/" + cur_month + "/" + (DatePart(DateInterval.Year, Now).ToString)
[Code]....
cnb_mnth is ComboBox for Month
txt_year is Text Box For Entering Year
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Apr 12, 2012
I have a query like so:
Dim clcexists = (From p In dbContext.Signatures _
Where p.StudentID = people_id _
And p.ContractType = "clc" _
Order By p.ID Descending _
Select p)
Later I check whether any rows exist in clcexists using IsNothing like so:
If IsNothing(clcexists) Then ' If no CLC is on file.
clcfirst = Date.Now.Subtract(year)
clcdate = clcfirst
[Code]....
But IsNothing() is not functioning like I expect. There is no row in the results table, but it is still acting as if there is and going to the Else clause.
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Jan 5, 2009
For some reason when i declare an array and set it to a certain amount of elements then under it specify the elements it works in VB 2005 but when i do it in VB 2008 it get : "declaration expected " and i get words underlined.
Public Class Form1
Dim words(20) As String
words(1)="Computer"
End Class
Let me know how to do this in 2008!
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Jun 30, 2010
A "declaration expected" error occurs when attempting to use any of the MY objects. What declaration needs to be made?
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Apr 21, 2011
I keep getting that error with this code
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Mail As New MailMessage
Mail.Subject = ""
Error occurs at the line above.
Dim SMTP As New SmtpClient("smtp.gmail.com")
SMTP.EnableSsl = True
[code].....
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Jun 22, 2010
ODBC_COM = New OdbcCommand("UPDATE President SET '" & President_UPDATE_field.Text & "'='" & President_UPDATE_text.Text + "'", ODBC_CON)
ODBC_COM.ExecuteNonQuery()
i dont know why im having error like this, what i know is my syntax for UPDATE command is correct and im using correct number of single quotes and double quotes?
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Jul 13, 2011
I'm simply trying to create an array of integers:
Dim amenities() as Integer
amenities=New Integer(){1,2,3,4,5}
And I'm getting this error:
Expected end of statement
Dim amenities() as Integer
It says the error is happening on "as", but I have no idea what I'm doing wrong.
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Apr 9, 2010
Everywhere text is in Black i get the error "Type Expected"
Private Sub Done(ByVal sender As Object, ByVal e As Windows.Forms.WebBrowserDocumentCompletedEventArgs)
TabControl1.SelectedTab.Text = CType(TabControl1.SelectedTab.Controls.Item(0),
[code]....
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Jun 16, 2009
(The Lines array is actually just the count of Paragraphs in the text, why they call it lines I don't know. )In order to do this, with word wrap, I need to know when I reach the end of a line. So in the Key_Down event I use some code to calculate the length of the current string and compare it to the width of the container. It turns out that the string is too short.
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May 18, 2010
I am running Windows 7 pro and using Visual Basic 2010 express.I have written a small program to switch on a USB relay which is controled by a serial port.I have debuged the program and it appears to work correctly. I have published the program and if I start it from thr run menu / desktop shortcut / or through explorer it works as expected.
However I have tried to run it by the Task Scheduler and then it fails to run as expected. I have a small section of code that checks to see if the serial port is present if not I have used messagebox.show to ask for the relay to be pluged in. In every case other than when running through the Task Scheduler the messagebox works with the Task schedulerit doesn't show the messagebox and the program hangs I have included the code I have used.
Dim retry As Boolean = False
Dim data() As Byte = {255, 1, 1}
Do Until retry
[code]....
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Mar 4, 2009
Have not used JavaScript for a while. Just started to review JavaScript in order to learnASP.net Ajax. The coding below showed the underline errors over the first showclock() and the following { -- Expected ';'After adding all the ';' the underline errors were still there The webpage just showed an empty form and an '>'What's wrong with the JavaScript coding?
<html xmlns="http://www.w3.org/1999/xhtml"><head><title>2-1</title><script type="text/javascript">var hour, min, secfuction showclock() {now=new Date(); hour=now.getHours();if(hour<=9) hour="0"+hour; min=now.getMinutes();if(min<=9) min="0"+min;s
[code].....
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Dec 23, 2011
The following code produces the compiler error "Expression expected" (Sub is underlined).
Dim lambda As Action(Of Integer) = Sub(x) Console.WriteLine(x)
Why does this not work?
Note: The corresponding C# code works:
Action<int> lambda = x => Console.WriteLine(x);
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May 22, 2011
[URL]. I have a Multi-Line textbox with several accounts in it. They are in email@email.comassword format on separate lines. All the code is right, but it goes really weird and loops like 3 times before logging in. Eventually logging into the last account on the Textbox instead of the first. It should just login to the first account...Logout....Login to the second account...Logout and continue the process.
If you want to test it, just put a web browser and a textbox1 multiline box, a button and enter a few working hotmail accounts and you'll see.
Check line 17
Looks like a lot of code, but line 17 is the only bit that needs to be looked at. The rest is just junk/non-relevant to this problem. It separates the accounts perfectly and stuff, but just wont login in the right order.
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Jul 9, 2011
Dim Fs as FileSystemObject
Dim TS as TextStream
Set Fs = CreateObject("Scripting.FileSystemObject")
Set Ts = fs.OpenTextFile(textFilePath, ForReading, False,
TristateUseDefault)
While not Ts.AtEndOfStream
Buffer=Ts.ReadLine
' Process the buffer
Wend
Ts.Close
Fs.Close
I tried to convert into c# but am getting ERROR like EOF expected, what I have to do?
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Mar 12, 2010
Has anybody ever seen the below error and had succuss solving it?
Value does not fall within the expected range.
Here is the whole error log...
PLATFORM VERSION INFO
Windows : 5.1.2600.131072 (Win32NT)
Common Language Runtime : 2.0.50727.1433
[Code].....
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Jul 28, 2010
I have declared a String variable(PC) for use within another String variable(currentQuery) to form a SQL statement to pass to my SQLDataAdapter variable.
I'm performing this action to change the string variable(PC) for the different onClick events I have.
It seems i can change this variable (PC) within my onClick event handlers and the 'PC' variable will change when I apply it to a testing Text Box 'testTextBox' but not for the currentQuery variable.
Do i need to perform this action as a function or am i missing something obvious - code below - I don't want to spend time writing a function to return a string value for my SQL statement if i can just tweek something in my code (below).
Partial Public Class IVMain
Inherits System.Web.UI.Page
Dim DBConn As New SqlConnection("Data Source=hnaServer;Initial Catalog=Hnastatus;User ID=Test;Password=test")
[Code]....
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Feb 26, 2011
Code:
'// Declaration of Variables
Dim Air_AH As Integer
Dim Air_Undercut As Integer
Dim Air_Bot As Integer
If rad_WoW_AH_Maelstrom_AH.Checked = True Then
[Code] .....
Shield is returning 0 regardless of the expected value. Can you not have three conditions in an if statement?
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