.net - Identical If() And If Yield Different Results
Dec 22, 2010
What is the difference in the two blocks of code below? I expected them to return the same result, but they don't.
In the case where xml.@Type = "null", I want PatientMetricTypeID (a nullable Integer) to end up being Nothing.
Block #1: If()
In this case, it ends up as 0. It looks like Nothing is being treated as an Integer and converted to 0. I can sort of see why this might happen but not fully... I would like to understand exactly how this works, and if there is a workaround.
Dim PatientMetricTypeID As Integer? = If(xml.@Type = "null",
Nothing,
CType([Enum].Parse(GetType(PatientMetricTypes), xml.@Type), Integer))
Block #2: If
In this case, it ends up as Nothing -- expected behavior.
Dim PatientMetricTypeID As Integer?
If xml.@Type = "null" Then
[CODE]...
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Sep 29, 2009
Will Visual Basic in Visual Studio 2010 have the YIELD keyword?If not.... Why?
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Sep 28, 2010
What is the best/easiest way to "translate" it into VB.NET? Especially i tried to convert this code into VB.NET, but i failed with:
yield return new MatchNode(++index, current.Value);
What i have is:
Imports System.Collections
Imports System.Data.SqlTypes
Imports System.Diagnostics.CodeAnalysis
[code]....
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Nov 9, 2011
Possible Duplicates: Translation of yield into VB.NETYield In VB.NETI try to convert the C# yield to VB.NET but i found there is no yield in VB.NET
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Feb 2, 2011
I'm converting some C# code and I'm stuck at this line:c# while (iterator.MoveNext()) yield return iterator.Current;
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Sep 10, 2009
I have the following code below which has an error. When the checkbox is set to true and for example change the "role", and click save the following error is given;
"Index was outside the bonds of the array".
I know the reason of the error but don't know the solution..
The TxtPayCont is a concatenation of title, fname, and lname in an array. Therefore, if all the fields have values, then it works fine. So if it is Mr Jones Tim, this works, but, if it is Mr Jones it does not. It has to have 2 spaces to work. Is there anyway round this...
(see code below)..
Code:
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Apr 19, 2011
I have a tricky piece of code in C# that I need translated to VB.NET. That's not usually a problem, as I can do it by hand or using one of the many conversion websites. However, this particular piece of code uses the Yield keyword; and I don't know how to work around that. [Code]
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Mar 26, 2010
Note that I'm aware of other yield in vb.net questions here on SO. I'm playing around with Caliburn lately. Bunch of great stuff there, including co-routines implementation.
Most of the work I'm doing is C# based, but now I'm also creating an architecture guideline for a VB.NET only shop, based on Rob's small MVVM framework.Everything looks very well except using co-routines from VB. Since VB 10 is used, we can try something like Bill McCarthy's suggestion:
[Code]...
It definitely isn't as elegant as C# version, but it looks to be doable. We'll see if there are any problems with this. If anyone has better idea, I'm all ears.
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May 17, 2009
In C#, when writing a function that returns an IEnumerble<>, you can use yield return to return a single item of the enumeration and yield break; to signify no remaining items. What is the VB.NET syntax for doing the same thing?
[Code]...
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Jun 25, 2012
I am using a .Net JavaScript implementation called Jurassic to run user-controlled scripts within my .Net 4 WPF application coded in VB.Net - C# answers are fine. The script engine runs on its own thread and provides an API for the script to interact with my application. This all works really nicely until a user executes a script that causes an infinite loop and takes out a core of the processor.
[Code]...
The reason I care about keeping the thread alive is because the user who wrote the script and the user who is running it may not be the same, and I want to keep the experience as smooth as possible the the user running the thread. There also might be legitimate situations in which a single JavaScript function would run for a long time and I do not want to kill that, I just want to stop being allowed to hog the resources.
Solutions that involve stopping the thread from slowing down the system but that still show high CPU usage are not preferable because I do not want the user to wrongly feel that the application is resource intensive.
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Sep 20, 2010
I have a table in a data grid the columns are bound to the columns...
SQFT QTY WIDTH LENGTH
i also have added into the datagrid an unbound column called Yeild%.what i'm trying to do is the following formula
SQFT / (QTY * (width * length / 144) and have the result return the answer in the unbound yield column for that row represented as a percentage
So if SQFT = 178 QTY = 2 Width = 144 Length = 102 answer would be 0.87 (rounded)
so this would be 87%
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Sep 28, 2010
I have a form that allows users to select file and then it reads the contents, parses the data and then executes a sql insert statement to add it to a database. What I am having issues with is showing real-time results. Currently, I have the import operation take place on the import form within the OnLoad event. The problem with this is it only shows the final results instead of the results real-time. Is there anyway to do this without creating a seperate thread and delegates?
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Aug 15, 2010
Most of my check boxes look like these (on the left of the picture) (ignore the checked check box in the upper left corner , I am not talking about tat one) :However , ONLY on tab 2 the check boxes look differently in both cases the check boxes are Disabled , but they don't look the same . Why is that ? I even tried copying the check boxes from tab 3 to tab 2 but to my surprise they once again looked differently ! This only happens on tab 2 . How is this possible ?
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Feb 2, 2010
Are these two vb methods identical in function
[Code]....
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May 25, 2011
1. This is probably really easy and I'm just missing it. I have 4 tabs in a controller. The contents in all four tabs will be identical (pictures, text boxes etc.) the end user would then add whatever to it. Whenever I try to copy the contents from tab 1 to any other tabs using ctrl+c and ctrl+v they get all out of alignment. Is there a way to duplicate a tab in the editor so that when flipping through the tabs all the text and pictures are in the exact same spot? I'm going out of mind on something that seams so simple.I don't want to have to write down the location of a couple of hundred controls and then retype them all 3 more times.
2. I can also only select text boxes, labels, and pictures at the same time. It will not let me select text boxes, labels, pictures and drawn lines all at the same time. So I can't really copy and paste everything at the same time I have to do it twice which makes the alignment get even more screwed up.
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Mar 1, 2012
i have n-Strings. Something about 100. But most of them are identical. How could i remove these multiple string and have only each string one time?
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Jun 20, 2012
is there any listindex property is available like vb6 in vs.net ? .because i want in the combo box .when it loads at least very first item needs to be selected .so let me know any way to do it
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Apr 17, 2010
I made a program with Visual Studio Express 2008, compiled for .Net Framework 3.5
I transferred the .exe and the other 2 files to my brothers laptop who also uses Windows 7, .Net Framework 3.5.
Every time I run the file it says "Windows Application has stopped working..."
However, I run it fine on my PC and it is also Windows 7, .Net Framework 3.5
Can anyone else think of a reason the program won't work on my brothers laptop?
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Jan 23, 2012
I have two classes, one nested in the other. [code]Neither "Name" or "ID" are unique between operations and records.I wish to construct a dictionary using LINQ = Dictionary(Of String, Of List(Of Integer), whereby the keys are uniqe examples of Names in my collection and the values are the collective set of distinct IDs that are associated with those names.
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Jun 5, 2011
I've just about scrambled my brain on this, searching and trying things, so I'm hoping someone sees something that I'm missing or can explain it to me. I'm new to .NET, used to do a lot of programming in VB but that was many years ago.
[Code]...
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Jan 24, 2012
How can I copy form and make identical form
say want to copy the style of one form & coding and make identicel form 2
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Apr 19, 2012
I have 8 comboBoxes and 8 identical items in each comboBox.If I select one of the items in comboBox1, how can make this item to disappear from all other comboBoxes ?
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Jan 19, 2012
I'm on Windows Vista Home Premium, using Visual Express 2010, working on a visual basic program.
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Jan 15, 2012
I have an application which has a tabcontrol that contains two tabpages. I have a custom made usercontrol docked to fill up each of those tabs. When I resize my main form to the minimum size allowed one tab resizes accordingly while the other seems to overflow the area and a couple ui items slip out of access/view.
One usercontrol was quite literally copied from the other and renamed and fields adjusted. The usercontrol size is the same between the two. Within the usercontrols there is a datagridview and a large panel full of textboxes and they have identical sizes and identical anchoring properties and even the same location coordinates.
I'm struggling to find a difference between the two but I really would like the resize behavior to match between the two usercontrols. I was wondering if anyone would have ideas of other things to check I did not mention here?
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Jan 24, 2012
I wish to insert a row into an SQL table a multiple number of times. The only field that will change is the Primary key ID which will update automatically.
To enter the INSERT into a loop seems very inefficient (time). The only other way I can find to do this is build up an array of values and do a multiple INSERT but again this seems very inefficient (memory) when the values will all be identical.
Is there a way of saying insert this row a variable number of times?
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Nov 16, 2010
is it possible to search and retrieve identical photos in a database using VB.NET platform
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Mar 17, 2011
I have made a little Hotkeys utility for Poker Tables. I hook the keys and, depending from the key, I simulate a mouse click over the related table button.The Sub that make the job is this:
Private Sub DoMouse(ByVal flags As NativeMethods.MOUSEEVENTF, ByVal Wheel As Integer)
'wheel = +-120 if wheel event, 0 in other cases
'added hoping to improve the code, but nothing changes, Hwnd is a global variable
[code].....
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Feb 19, 2011
The Sub that make the job is this:
Private Sub DoMouse(ByVal flags As NativeMethods.MOUSEEVENTF, ByVal Wheel As Integer)
'wheel = +-120 if wheel event, 0 in other cases
'added hoping to improve the code, but nothing changes, Hwnd is a global variable
[code].....
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Feb 23, 2012
I am converting C# program to VB. I heard that "Yield" statement is ready from Visual Studio 2010 SP1.
[URL]
I updated my developing environment to Visual Studio 2010 SP1. However IDE still displays error to the following code saying that "yield" is not delclared.
Public Class WeakCollection(Of T)
Implements IEnumerable(Of T)...
ReadOnly innerList As List(Of WeakReference) = New List(Of WeakReference)()
[CODE]...
How can I use "Yield" statement in VB?
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Oct 17, 2010
[code] I dont really understand what the error-msg means. I've used this bit of code in many of my projects but this time I get this error: [code]
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