Syntax For Using List.FindAll() With A Lambda?

Sep 1, 2011

In C# I have been performing a FindAll in a generic list as follows:List<group.category> tlist = list.FindAll(p => p.parid == titem.catid);Two questions, is this the appropriate way of performing such a thing and how do I convert this to VB.Net

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Can List.findall Reference A Variable?

Jun 30, 2010

Such as:

mylist.FindAll(Function(item) item.property = variable)

The reason I ask is if I use syntax like this, I tend to get a string to whatevever conversion error, which makes me think "variable" is being treated literally as a string.

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Lambda Function Complex List Sort

Aug 12, 2009

I'm trying to sort a list of string, which (each item) consists of a word followed by a space, then a number. I want to sort first alphabetically by the word, then numerically by the number. I tried something like this:
wordList = wordList.OrderBy(Function(x, y) CStr(x.Split(" "c)(0)).CompareTo(CStr(y.Split(" "c)(0)))).ThenBy(CInt(x.Split(" "c)(1)).CompareTo(CInt(y.Split(" "c)(1))))

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Lambda Coding - Basic Code Of Lambda With Explanation

Jun 21, 2011

Im hearing about this, can someone explain it to me or please show some basic code of Lambda with explanation.

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Lambda Tutorial And Solving A Lambda-Function

Dec 14, 2009

Is it possible to shorten the following function to a lambda expression?Or (to do the trick by myself) what is the best and most understandable for beginners tutorial for lambda in vb.net?[code]

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Use FindAll And Then Sort In ListOf

May 9, 2012

I'm trying to get specific elements of a listOf structure with the function findAll plus a lambda function, and then sort that result and keep that sorting of those elements saved in the list. The structure of the listOf has an id and an age, so what I want is get all the items with id=0 and then sort the ages of that result, keeping that modification in the variable.

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Array.FindAll Case Insensitive Strings?

Dec 27, 2011

I am working on a program for a client and will need a feature to search for strings from an array without case sensitivity. This currently works, but it is case sensitive. I commented out the code for readability.

' Declare array for goldSmithingExpertise and add items.
Dim goldsmithingExpertise() As String = {"Alluring Earrings", "Alluring Ring", "Alluring Belt", "Howling Staff", "Dawn Ring", _
"Melancholy Earrings", "Melancholy Belt", "Melancholy Ring", "Jubilant Ring", "Jubilant Earrings", _

[code]....

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Office Automation :: FindAll Matching Strings In Excel Range / Array?

Feb 12, 2012

I am importing data from an Excel spreadsheet into an array. I want to search the array to find the location of each "cell" with text that contains a certain string (e.g. "MyTestString"). So far the best I can do is loop through each element and test it using CStr, but the code takes too long to execute (please assume all variables are properly declared):

[Code]...

(1) Is there a better way than looping through each element, such as a built-in function or a lambda that will return an array containing *the location of* all string matches?

(2) Would it be faster to convert the Object array to a String array rather than using CStr on each element? If so, what is the fastest way to convert a 2-dimensional Object array to a String array?

I've considered using Excel's Find function instead, but would prefer to limit the number of Interop calls to Excel.

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Get Syntax For Attribute In List?

Nov 1, 2011

I have a list( of clsCourseList) which is a class that contains a boolean value "Scheduled" I want to return a boolean value if ANY of the items in the list of clsCourseList contain a "Scheduled" value of False.I was playing around and have this (courseList is the list of clsCourseList

courseList.Exists(Item.Scheduled = False)

but I receive an error for the item keyword. I don't really understand the syntax its just something I found online, but it was in C#.

The purpose of this is to quickly check if all classes are scheduled, without looping through each one as there are hundreds and this takes place a few times in the program.

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Syntax - Object Initialiser List(Of T)

Jul 15, 2010

I have been looking at some C# code:

[Code]...

But I would like a List(Of Employee) as it is bugging me as to why this doesnt work in vb.net?

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Syntax For Blank List View

Mar 15, 2012

what is the syntax for blank list view object... for example:[code]what is the syntax for classlistview is blank? as in no record(s) were retrieved.

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Mvc 3 - MVC3 Razor View Project Gives Syntax Error In Error List Window For All VBhtml Pages?

Feb 22, 2011

Using MVC3 and Razor View engine, I created a VB.NET web application in VS 2010. This creates the default Account and Home Controller along with corresponding Action Views.Now if I open any vbhtml file I get the following error message in the Error List window.

Error 50 Syntax error. C:****MVC3AppVBViewsAccountLogOn.vbhtml MVC3AppVB
(See screenshot here http://www.flickr.com/photos/7672540@N07/5469248676/)

[code].....

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Syntax/Command Trying To Implement Syntax Highlighting In RichTextBox?

Oct 12, 2011

I am having an issue trying to figure this out. I am writing a script editor that uses tabs (a tab control) and I want to implement syntax highlighting. My issue is that every sample I can find on syntax highlighting uses

Private Sub RichTextBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RichTextBox1.TextChanged

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C# - Syntax Conversion - Translate Syntax ?

Dec 16, 2009

Can any one translate the following syntax to vb.net.

m_TextBox.Loaded += TextBoxLoaded
m_TextBox.Loaded -= TextBoxLoaded;
private void TextBoxLoaded(object sender, RoutedEventArgs e)[code].....

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Convert Late Binding Syntax To Early Binding Syntax In .net?

Sep 5, 2011

i have this code:Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

[Code]...

Error 1: Option Strict On disallows late binding.Im using visual basic 2010 express on a gateway laptop thats running Windows 7 OS How do i resolve this error?

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Convert Late Binding Syntax To Early Binding Syntax?

Apr 9, 2009

I have a listbox and it it I am showing numbers.It should look like this (line by line) 1,2,3,4,5,6,7,8,9,10,11.....but is is showing it like this 1,10,11,...2,20,21...3,30...ow can I make it that it will show it in number order 1,2,3,4,5......

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Syntax Error: Syntax Error: Missing Operand After '14' Operator

Oct 21, 2009

I want to select some rows from a sql express 2005 table. I am using this expression: "Starttime >= " & dtpStart.Value dtpStart is a DateTimePicker But I am getting this error: Syntax error: Missing operand after '14' operator.

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C# - Lambda Expression: CS To .Net?

Aug 24, 2011

I am dumb founded at this statement....maybe its just too many hours/days of doing C# to VB.Net conversion but i am drawing a blank on this conversion.

List<string> sColors = new List<string>(this.CustomPaletteValues.Split(','));
try {
List<Color> colors = sColors.ConvertAll<Color>(s => (Color)(new ColorConverter().ConvertFromString(s)));

What i have so far:

Dim colors As List(Of Color) = sColors.ConvertAll(Of Color)(....)

As you can see its the content of the lambda that i am hitting a brick wall with.

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C# - Use Or Not Lambda Expressions?

Nov 11, 2009

I see lambda expressions have become a very useful tool at some points in the language. I've been using them a lot and most of the time they fit really nice and make the code shorter and perhaps clearer.

Now.. I've seen some , I would say excessive use of them. Some people like them so much that try to use them everywhere they can.. Some times the C# code looks like a functional language. Other factors against are the cost using reflection by lambda and that not friendly to debugging.I would like to hear opinions about how good and how code clear it is to use more or less the lambda expressions. (this is not the better example, but let's say it was the trigger)I was writing the following code. The use of the delegate { return null; } helps me avoid having to ask if the event is null or not every time I have to use it.

public delegate ContactCellInfo.Guest AddGuest();
public event AddGuest GuestRequest = delegate { return null;}

Im using resharper and the wise resharper( even it some times literaly eats the memory) made me the following suggestion

public delegate ContactCellInfo.Guest AddGuest();
public event AddGuest GuestRequest = () => null;

At my point of view the code using the delegate looks clearer. I am not against the Lamdba expression just would like to hear some advices on how and when to use them.

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C# Lambda Conversion To VB?

Dec 21, 2009

I have been looking at certain tutorials on sharparchitecture and trying to no avail (the online convertors don't seem to be able to do this):

private Action<AutoMappingExpressions> GetSetup()
{
return c =>

[Code].....

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Convert C# Lambda To .net?

Jan 2, 2011

converting this to VB.NET

public void GetCustomers(Action<IEnumerable<Customer>> onSuccess, Action<Exception> onFail)
{
Manager.Customers.ExecuteAsync(op =>
{

[code]....

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Convert Lambda From C# To .NET?

Apr 20, 2010

How would I translate this C# lambda expression into VB.NET ?query.ExecuteAsync(op => op.Results.ForEach(Employees.Add));

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;

[Code]...

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Lambda - Using PredicateBuilder With .NET?

Oct 1, 2009

I have recreated the Predicatebuilder class in a seperate C# project and I'm trying to use it in a VB.NET project but I keep getting the following error: Overload resolution failed because no accessible 'Or' accepts this number of arguments.when I use it like so:

Dim predicate = PredicateBuilder.False(Of t_Quote)()
predicate = predicate.Or(Function(q) q.iQuoteType = iQuoteType)

The relivant project is referenced, I'm using the correct imports statement and it all compiles without any errors.

[Code]...

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Lambda Expressions In C# Vs. .net?

Jan 20, 2010

Functionally, is there any difference (apart from syntax onbviously) between lambda expressions in C# and VB.Net?EDIT: following up on CraigTP's answer: any references to the situation in .Net 4?EDIT: I'm asking because I'm used to C#, but for a next project the customer asks VB.Net. We're not a priori against that. We realize that most language constructs are supported in both languages. However, we're particularly fond of the way C# implements lambda expressions. We would like to have an overview of the differences with VB.Net

EDIT: accepted CraigTP's answer for pointing out what I currently consider the most important difference.

So to summarize: VB.Net 9 does not support multiline statements in a lambda expression, and a lambda must always return a value. Both of these issues are addressed in VB.Net 10

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.net - Convert C# Lambda Expression To VB?

Mar 23, 2012

In looking at Fuzzy Date Time Picker Control in C# .NET? Piotr Czaapla's answer to that question is exactly what I need. unfortunately, I'm a VB.NET guy and I'm not that familiar with lambda expresions, so my attempts to convert the code have resulted in hours of misplaced parenthesis and banging my head with a brick.

Any chance some bi-lingual wizard could convert the C# code to VB.net for me?

[Code]...

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.Net Lambda Expression With No Intellisense?

Mar 9, 2011

Using lambda's in VB.Net results in no intellisense. Is this a bug with VS2010 or expected? Note that it works fine in C#

Return Array.TrueForAll(chequeColl, Function(x) x.Number <> "N") 'No intellisense Number does not appear
Return Array.TrueForAll(chequeColl, Function(x As MyClass) x.Number <> "N") 'Now casted intellisense appears

UPDATE: Here's an example

Public Class Cheque
Public Property Id As String
Public Property Status As Byte

[code]....

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C# - .NET Async Lambda-expressions?

Apr 20, 2012

Async Sub like this: Dim f As Func(Of Task) = Async Sub() End Sub Produces compiler error: error BC36670: Nested sub does not have a signature that is compatible with delegate 'System.Func(Of System.Threading.Tasks.Task)'.Equivalent C# code compiles fine:

Func<Task> f = async () => { };Rewriting Async Sub into Async Function make code works.

Why does Async Sub() is not convertible to delegate types with return value of type Task?

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Convert C# Lambda += Expression To VB?

Feb 15, 2011

How should the following C# code be converted to VB.Net? I have tried several code converters and none produce correct results.

[code]...

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Convert C# Lambda Function To .net?

Oct 6, 2011

I have this function that maps a IDataReader to a class. It is obviously written in C#. My co-worker wants to use the same method in his code, but he is writing in VB.net. Basically I am having difficulty rewriting this due to the Lambda expressions used in C#. He is running .Net 3.5.

[Code]...

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Converting A C# Lambda Expression?

Dec 15, 2011

I will probably sound like a bad developer here, but I am attempting to convert some code from the following page from C# to VB.NET:The code I am having trouble converting is from Step 4 of "Joining a Multicast Group" on the page, and here is the code with the comment lines removed:

private void Join()
{
_receiveBuffer = new byte[MAX_MESSAGE_SIZE];

[code].....

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