C# :: Correctly Using CancelEventAgrs?

Nov 18, 2011

How should I correctly use CancelEventAgrs/CancelEventHandler?Does checking e.Cancel will return always the "right" result, even if the event eventually could consume some time?

Class Foo
Public Event Deleting As System.ComponentModel.CancelEventHandler
Private myObjectsToDelete As List(Of Object)

[code].....

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.net - Will The Following List Populate Correctly

Jan 9, 2011

I don't have access to VB.NET right now so I can't test this value:Dim lst As New List(Of String)(cookieValue.Split("$"c))i got this from another question , but was wondering if A. The list will populate correctly and B. What does the c represent?

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.net - CurrentThread.CurrentUICulture Is Set Correctly But Seems To Be Ignored By Asp.net

Apr 28, 2011

Im struggling with gettings the values from the correct strings.txt in my resource files in my in folder when switching languages. I have a [URL] (for English) and a domain.nl (for Dutch). It however doesnt seem to matter which domain I use and how I set the currentUICulture, the language shown to the user is always the same!

[Code]...

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.net - How To Correctly Use CultureInfo.invariantCulture

Jun 1, 2011

I'm trying to read a number from a user imput (string) like:

'where "." is grouping separator and "," is the decimal character
dim strUserInput as string = "172.500,00"
dim ret as double

[code]....

How can I correctly use cultureInfo to return 172,500.00 (or 172500,00 or just 172500) to a double var?

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Application Not Closing Correctly

Nov 12, 2011

I'm having a problem over here; I'm developing a DirectX 9 application, and for some reason, I can't figure the way to close the application completely. This has never happened to me, to be honest. I am using Application.Exit(), which doesn't seem to do anything - it just closes the form, but the program is still running. I have also tried End, but it throws a run-time error I can't seem to figure out.

[Code]...

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Asc Command Not Working Correctly

Dec 13, 2009

I have been making a text based noughts and crosses game and trying to convert an alpha grid reference into a number to run the logic sequence that decides whether the an input is valid. I am using the asc command to convert but it just keeps putting up the error: Conversion from string "a" to type 'Double' is not valid, when it reaches the line If (Asc(Left(choice, 1)) >= 65 And Asc(Left(choice, 1)) <= 67) Or (Asc(Left(choice, 1)) >= 97 And Asc(Left(choice, 1) <= 97))Choice is the input and has already been checked for length, whether it contains an alpha and numeric input (and where they are) and whether the numeric value is valid.

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Asp.net - Correctly Check DBNull In VB?

Jan 13, 2012

Why does the following code: A = not IsDBNull(CurRow("BuyBook")) AndAlso CType(CurRow("BuyBook"), string) = "Yes" results in the following error:

Conversion from type 'DBNull' to type 'String' is not valid.

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C# - How To Use Double Quotes Correctly

Oct 3, 2011

This form works in VB .NET
sendMsg = "<CStatus timestamp=""0"" " & _
"type=""login"" " & _
"cid = """ & cID & """ " & _
"key=""" & loginKey & """ />"

But I can't get it work in C#
sendMsg = "<CStatus timestamp="0"
type="login"
cid="" + cID + ""
key="" + loginKey + "" />";

It does not give the same effect. I want this as an output:
<CStatus timestamp="0" type="login" cid="var_cid" key="var_key"/>;
Is there any stringXml command in C# or another way to use double quotes in string?
Solved it with XmlTextWriter

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Cannot Get Some Fields To Calculate Correctly?

Mar 29, 2010

For some reason I can not get some fields to calculate correctly. It seems anything I enter over 24 in the Pay Rate field it throws it spits out the exact numbers I am trying to multiply. The FWT (0.2), FICA(0.08),and State fields (0.25) respectively.

[Code]...

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Cannot Measure String Correctly

Jun 30, 2009

I don't know how many different ways I have tried to do this, it never spaces the strings right.[code]...

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Cannot Print Correctly In VB 2008 ?

Apr 14, 2009

I 'm having no trouble coding, I'm back to my initial printing problems. The program printed Avery labels in a variety of sizes. I created the label templates on 8.5 x 11 forms and then printed the forms. This cannot be done in VB 2008 for a variety of reasons:

1) The form size cannot be larger than the screen size I got around this by creating a new form class that matched my dimensions.

2) printform only does screen shots. This was a major barrier. First of all I can't get printform to print my custom form because it's not a member of system.window.forms.form, it's a class in system.window.forms.usercontrol. However, even if it was in the correct class, it wouldn't work correctly because printform in VB.net, does a screen capture of the form and then reduces the image on the printout.

So that is my dilema. I do not know how to use the reporting tool, but I can see that it must be binded to a database. Although my application does use a database, I want to be able to massage the data before printing it. And the application does more than just print labels. There are also custom reports that need to be printed.

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Characters Not Displaying Correctly?

Jun 5, 2009

I am currently working on a project that will read HTML pages and store some information. I am doing this by loading the HTML page into a webbrowser, then viewing the source of the page by using:

[Code]....

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Click Not Running Correctly

Dec 8, 2011

Evey time the "bomb" image pops up, the entire thing seems to break. I have trouble shooted this simple game for most of the day trying to figure out where the break is but Ive had little luck. I'll have to post this in multi post because it will not let me post all in one block.

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Close An Application Correctly?

Jul 23, 2009

Ive seen that people use Form.Close() and Application.Close(), but what if I have many forms, and I may have forgot to close one of the forms correctly, is there a way to exit the application that actually checks to make sure that all the processes related to the program are closed first? I read on another forum that Application.Exit() is a bad way to close the program, and I found an example code of how to do it the right way, but Ive never found this anywhere else before.

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Collection Not Loading Correctly?

Jun 17, 2009

I have a issue with loading a collection. The issue is that when I load a collection up with multiple objects that the only items that are in the collection is duplicates of the last object that was added in. I was through the process of creating the new object and it is loading correctly but when it adds it to the collection, it changes all the prevoius objects with the current object. Here is the code that I am using. I have been messing around with this code for a day now and can't figure it out.

[Code].....

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Correctly Dispose A Shape In .net?

Jan 28, 2011

how do you correctly dispose a shape in vb.net ie when you draw a rectangle using the pen function how do I depose it so that it will disappear from the form, for some reason once its drawn if I draw a new shape it keeps the previous one and just overlays the new one and I use shape.dispose, and pen.dispose?

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Date Not Converting Correctly In .net?

Jun 10, 2012

It seems like I keep having problems with dates. I am using the following code:

Dim LocalDateCultureProvider As New CultureInfo(CultureInfo.CurrentCulture.ToString)
Dim CurrentDate As DateTime = Convert.ToDateTime(System.DateTime.Now.ToString("dd/MM/yyyy"), System.Globalization.CultureInfo.InvariantCulture)
ExpiryDate = DateTime.ParseExact(strDate, "dd/MM/yyyy", LocalDateCultureProvider)
If DateTime.Compare(ExpiryDate, CurrentDate) < 0 Then
MsgBox("This file has expired.")

[Code]...

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Display Correctly On DPI Settings Other Than 96 DPI?

Dec 21, 2008

In fact I noticed that my application won't display correctly on DPI settings other than 96 DPI.Well, this is a critical problem for me, I don't know how can I disregard it and show my application normally without problem?

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Dispose Of Image Correctly?

Jun 3, 2012

i am aware of the dispose method to free a resouce that is in use, but ive run into trouble and ive no idea how to dispose of an image because ive assigned it using the "new" keyword

While i < directorylist.Count
Dim imagePath As String = directorylist(i) + "\folder.jpg"
' ResizeImage(directorylist(i) + "\", imageName, 50)
Try

[code].....

i know that when i assign an image to a picturebox i can feel up the resource using picturebox1.dispose()here im using "new" so i dont know what to dispose of??

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Form Not Showing Correctly?

Jun 7, 2011

I have a single form called 'FolderSelector' with a label, textbox and a button.The problem I'm having is that everytime I run the application, the only thing that shows up is a blank form called 'Form1', the program runs everything it should do except to show the actual form which is really weird.Here's the code in case there's something in there that's causing it that I haven't spotted.

Imports System.IO.Directory
Public Class FolderSelector
Public Const SPI_SETDESKWALLPAPER As Integer = &H14
Public Const SPIF_UPDATEINIFILE As Integer = &H1

[code]....

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Get Progressbar To Show Correctly?

Mar 6, 2011

I am making a program that can backup files and folders, i cant seem to get my progressbar to show correctly, is there a way (without showing the default windows copying progressbar) to get the total MB of all files and sub folders in a directory and then make a progressbar have max = MB and how to step this progressbar?If it is not worth it, it is not fun - you say programmers are boring but i say they are worth it.

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Get The Printer State Correctly?

Aug 20, 2011

I'm developing a program (VB.NET Form) that has printing function, then i have to alert user when an error occurred such as paper out, paper jam or etc. I found that .NET has WIN32_Printer class use for retrieve printer information and status. I can get printer status (Idle, Printing) correctly except offline, but for DetectedErrorState... always get 0 if printer has no problem and 2 if any problem found. (from reference 0 means Unknown and 2 means No Error) How can i get printer state correctly? Is this related to printer manufacturer or their driver? Because their application can alert correctly, i guess that driver never return value to WIN32 Class.

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Getting Elements Into Array Correctly?

May 12, 2009

In this case I'm trying to create a number analysis app. I'm required to declare an array and get the data for the array using ten text boxes. Why, because my instructor said so.

My problem is my event is returning zero. Therefore I believe my code is somehow flawed.

My approach is to create functions that calculate the required metrics. I have only tried to code one function to date. If I can get help making one function work, I will be able to do the others .

Public Class Form1
Dim decScore0, decScore1, decScore2, decScore3, decScore4 As Decimal
Dim decScore5, decScore6, decScore7, decScore8, decScore9 As Decimal

[Code].....

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Have Implemented IEquatable Correctly?

Mar 18, 2012

I saw the question posed here: Have I implemented Equals()/GetHashCode() correctly? but my c# is not as strong, and I am unfimiliar with IEquatable enough that I would like to see this in VB.NET if possible please.My example code (The class will eventually use INotifyPropertyChanged when I get there):[code]

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How To Add New Row To An Empty Datagridview Correctly

Apr 23, 2010

i'm using vb 2005.I have a datagridview binding to a datatable, and user can add new rows to it. i want to enable copy and paste, so i broke the clipboard content into string array, and tried to fill the values in the datagridview.

I had problems when i had to add new row to the datagridview. because if the user clicks the last row (*) to paste the content, i need to add new row to the datatable, however, the current row is also a new datagridview row. If i just use the following code

'dgv is the datagridview
'dt is the binding table
dt=dgv.datasource
iRow = dgv.CurrentCell.RowIndex

[Code]...

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How To Correctly Filter A Datatable

Jun 17, 2010

[code]When I call da.fill I am inserting all records from my query. I was then hoping to filter them to display only those where the GroupingID is equal to 0. When I run the above code. I am presented with all the data, the filter did not work. Please can you tell me how to get this working correctly.

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IF Then Statement Not Working Correctly Where Value Is Nothing

Feb 27, 2012

MVC3 VB.NET application. I have the below section of code in a function. This code is supposed to only fire if the handout1 is not nothing. But for some reason it is going into the then block when the handout1 is nothing in the database... I have tried a hundred different ways of checking but it is still trying to run that line of code even when there is nothing to assign to it....

[Code]...

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MDI Forms Not Locating Correctly

Jan 3, 2012

I have a problem with MDI forms and their location. I have a container form within which I open several child forms. Also note that in the container form I have a ToolStrip at the top and it is also docked to the top. In each of the child forms I have set the following properties. I have set them at design time as well but it wasn't working for some reason so I put them in the form_load event as well.[code]...

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MonthCalendar In .net Not Drawing Correctly

Feb 25, 2010

I put a monthcalendar in my form and when I select a range of date, the selected area goes white, all the dates in the selected range go white. I have no clue how to fix this.

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Pages Not Rendering Correctly

Jul 5, 2011

I'm getting a strange problem with an ASP.NET web application that is in production. The problem is that pages intermittently don't render correctly (see screen shot below). It isn't one particular page in the application or one particular use that is having the problem.

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Progress Bar Not Behaving Correctly?

Feb 10, 2012

I am using VB 2010. I have a process that gets file names into an array and then processes each individual file. To know the progress of the process as a whole I added a progress bar. I init the Max property with the number of elements in the array, set Value to 0 to clear the progress bar and then I start processing each file. Processing takes a minimum of about 5 to 7 seconds, so I should be able to see the progress.

The problem is that the progress bar does not correctly visually represent the advance of the overall process. For testing reasons I am using 4 files. When the first file is done, the progress bar is empty. When the second file is done the progress bar is filled 25%. When 3 files are done it is filled 50%. When all files are done it fills to 75% then immediately jumps to 100% filled.

The kicker is that when I uncomment the messagebox statement shown in the code example it works just fine! I added the DoEvents() then the .Refresh call, but there was no change in behavior. I left the .Refresh commented since I believe that it is redundant with the DoEvents call. I think it might be a timing issue where the progressbar does not attempt to update until after the .Refresh/DoEvents() statement, by which time is now processing the next file.

Code follows:

'Get the file specs into array.
'Set up the progress bar.
progressBar.Maximum = strArrayOfFiles.Length()

[code]....

I built the project into an EXE and ran it under Win 7 and Win XP. It works right under XP, but continues to show the above described behavior when it runs under Win 7.

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Records Not Printing Correctly

May 19, 2009

I having issue with my program not printing to debug all the "records" in my text file my indualvidual print record works fine but not one that prints all the records in my text file[code]....

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Set The Focus Correctly On That Combobox?

Mar 4, 2012

I want to set the focus on the first object to be used by users in a form. It's a combobox. I do the following on form load:

Me.myCombobox.Focus()

but nothing happens. The cursor is not blinking in the combo text and if i type something it is not written in the combobox...

How can i set the focus correctly on that combobox?

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Sql - Textbox Not Displaying Correctly

May 4, 2011

Based off this VB code I'm getting everything to create correctly within my SQL database but instead of the Food_ID displaying in the txtfoodid it's popping up in a message box (I think it's because of the Try/Catch).

[Code]...

I've tried multiple ways of getting it to display but nothing's worked so far.

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TableLayoutPanel Cannot Correctly Add Columns?

Oct 6, 2010

I'm trying to dynammicllay add buttons to a form. I figured a TableLayoutPanel would be best for this because i dont know how many buttons i'll have to add. I wanted it to come out looking like the following:

[Code].....

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VB Teacher Example Does Not Work Correctly?

Feb 21, 2012

just had a walkthrough in class and the example code our teacher gave us does not return a value. I am having alot of trouble with my current assignment because I do not see whats wrong with it. It is supposed to take two numbers entered by the user and add them together for a total with a tax rate, but it continues to return all 0's heres what the code looks like:

Public Class Form1
Private Sub BtnCalc_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles BtnCalc.Click

[code]....

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VS 2008 <br /> Tag Not Being Rendered Correctly

May 21, 2010

I'm building an application that outputs a list of usernames to an HTML document. I'm using this to generate a string:

For y As Int16 = 0 To intBuddyList - 1
strBuddyListHTML = strBuddyListHTML & strBuddyList(y) & "<br />"
Next

The resulting string is then put into an HTML document. The problem is, when I load the document, the brackets are displayed literally. When I view the source, I see this:

buddy1<br />buddy2<br />buddy3<br />buddy4<br />tbuddy5<br />tbuddy6<br />

Is there a way to preserve the brackets in the HTML tags?

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VS 2008 If Cph >= 4.2 Then ... Not Responding Correctly?

Apr 21, 2009

I have a block of code that has a test for a variable I use. The Code doesn't respond correctly when the variable Cph which is declared as a double is at 4.2.

HTML
If Cph < 4.1 Then
ElseIf Cph >= 4.1 And Cph < 4.2 Then

[code]....

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Wcf Reference Not Being Generated Correctly

Oct 28, 2011

Ran across a weird problem with my WCF references this morning. In a nutshell, I have a duplex service set up so that a server can notify a client by sending objects in a data contract. When a client connects, it runs a function on the server to return a List(Of NewItem) based on what's in the shared queue of the service class. The trouble is, when I update my service reference in the client, it says the function returns a NewItem object, not a List(Of NewItem) object. I can go into the reference and manually change it to a List object and it'll transfer just fine. Any ideas why the service reference generator would arbitrarily change my return type? [code]

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.net - Creating An (VB) APP And It Isnt Working Correctly?

Apr 11, 2012

I am at college and am creating an app. however i have two main problems within my app. my app is a pizza app which will allow staff within a pizza shop to send the orders to the kitchen (this is just a listbox).but, the math doesnt work, the correct pricing isnt being displayed in the label for the orders for some reason. I have tried different ways of writing and placing my code but the result is always the same. also, i have five customers per table. if i select all the customers orders and click on send, only customer two's order will be sent. not any of the other customers, but if i just do customer one on its own, it works.

[Code]...

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.Net - Dispose Correctly Children Object

Aug 19, 2010

From code analysis (Visual studio), I got this warning:

[Code]...

The warning disappear but then the literal control isn't anymore being displayed on the page... EDIT Note that the code come from a Microsoft web page: [URL]

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.net - FileInfoComparer Not Sorting Correctly (on LastWriteTime)

Dec 22, 2011

I have a simple (ASP.NET) web page that lists files of a particular type in a folder and renders them in a ListView.

I've tried to sort them by descending LastWriteTime, that is, in reverse date order. However, although the sort process does change the order of the array, it doesn't sort it correctly. For example, one item with a LastWriteTime of #6/3/2011 12:00:00 is top of the list, but another item with a LastWriteTime of #12/16/2011 12:00:00 is halfway down the list after sorting.

Code:

Dim dirInfo As New DirectoryInfo(Server.MapPath(AppSettings.Item("ContentDir")))
Dim FileArrayList As New ArrayList(dirInfo.GetFiles("*.msg", SearchOption.TopDirectoryOnly))

[Code]....

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.net - Long Lines Don't Render Correctly

Feb 4, 2012

I have a project with a canvas that the user can zoom and pan using the mouse. The origin is marked with a blue cross running through the canvas. As the user zooms in the line width of the markers is reduced to keep the them about 1 pixel wide on screen. However, after zooming in about 10x the origin lines abruptly disappear. It seems like the rendering engine is deciding that the line is too small to be displayed before applying the scaling transform.

What is strange is that when I do the same operation to a rectangle instead of a line I get the expected behavior (see the ScaleBox rectangle object in the code below). Any ideas on what is causing the problem and how to fix it would be welcome.

Here is the relevant XAML:

<Canvas x:Name="MouseCapture" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="WhiteSmoke" >
<Canvas x:Name="ZoomPan">
<Canvas.RenderTransform >

[code]....

Here is a screenshot as 10x Zoom. The origin lines have disappeared abruptly, but the black box still shows up as expected. (Note that only one side of the black box is visible because the rest is outside the visible region because of the zoom.)

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.net - What To Do When Dll Return A String Not Correctly Terminated

Mar 10, 2009

I have an third part dll that have a function that returns a string.When I call the function I got for example "123456" back. At least it seams like that, but when i do mystring.length it does not return any length. If I set the text property of a label it shows "123456".

When I have the string I got from the dll I send it to a webservice function:

rem call dll and get string
dim mystring as string=mydll.getstring()
rem Send it to the webservice
webservice.SaveString(mystring)

The webservice crashes with an webexeption ("protocoll error") when I send in the string I got from the dll. If I instead send it like this:

rem call dll and get string
dim mystring as string=mydll.getstring()
rem Send it to the webservice
dim FixedString as string = mid(mystring,1,6)
webservice.SaveString(mystring)

Then it works and everything is fine. That leads me to think that the string I got from the DLL is in someway not terminated correct.And I dont know how to fix it from vb.net (I cant change the DLL)and I dont know in beforehand how long the string will be.The dll does only work on site when specific hardware is connected so I can't sit at the office trying to fix this in dev-environment. So I would like to have some possibly solutions to this before I go to the customer again.

Edit 1:I tried to just do a loop that looped from 1 to 100 (because I dont know the real length) and tried to copy all characters that <>"" to a new variable but it didnt work. I didnt try other variants because the day was over and I had to leave the customer site.

Edit 2:The DLL Im talking to is made in VB6. That DLL is talking to other DLLs that is made in C++ (I think).

My program < - > vb6-DLL <-> c++-DLL <-> hardware

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