Listview DataRowView and ListViewDataItem by rbellantoni 8/4/2010 5:01:00 AM First you need to cast the listview item to a listviewdataitem, then you can cast it to a datarowview and pull out any information from the datasource like so.

.net Thread Safe Method To Add A Listview Subitem? Feb 21, 2011 I am trying to add a subitem to a listview in a threadsafe manner.In a single threaded application it works like so: [Code]. However if run in another thread it causes a cross threading error.I have looked at examples of delegate subs that use Invoke, but all examples i have seen involve updating the text property of an object, and i cant get my head round how to apply the concept to actually add a subitem to a listview. Similar Messages: • • • • • • • • • • • • • • • • • • • • • • • • • • • • • ADVERTISEMENT Nov 2, 2009 Let's say that I have a module that has a Queue in it. For other entities to Enqueue, they must go through a function: [Code].

If I have multiple threads running and they want to call InsertIntoQueue(), is this considered thread safe? I am under the impression that there is only one copy of the instructions in memory necessary to perform the InsertIntoQueue() function. Which would lead me to think that this is thread safe. However, I wonder what happens when two threads attempt to run the function at the same time?

Is this thread safe, and if not, how can I make it thread safe? (and What would be the performance implications regarding speed and memory usage) Jan 2, 2010 I Have a Function on my frmMain Class wich will update my control to something else after an invoke. When i type '?Label1.Text' on the Immediate Window, the text property IS updated, but when i go check the Form, nothing happened. The code is just like this [Code].

Sep 16, 2009 I currently have a form with a listview. On another form, I would like get all the items from that listview. This I can achieve but I always get the 'Cross-Thread operation not allowed exception' message. I've tried the following code to avail. Feb 22, 2011 I have a small program that checks webpages for certain strings.

I am using VB express 2010.net version 4.I have the list of URLs in a listview, and loop through all the urls, perform a webrequest, check if the source contains certain strings and then add a subitem to the current listview with text to indicate the result I am attempting to speed the application up using a parallel.for loop, but this causes a cross threading exception.This is the code for single threaded: For i As Integer = 0 to lvUrls.Items.Count - 1 Dim lv As ListViewItem = lvUrls.Items(i) lv.UseItemStyleForSubItems = False [code]. Aug 27, 2009 I am trying to display the listview subitem in the Listview.Actual Problem Dispaly:I have to dispaly the three values: BARcode CheckoutFlag TAGUID L00657 Loo657 E00010003E But,I am getting the wrong display: BARcode CheckoutFlag TAGUID E00010003E Loo657 E00010003E I am unable to print the barcode value.where ever Ia m able to display the Little value.The main two functions are below. Vb.net Private Sub rfLoadtoList(ByVal iBarcode As String, ByVal iTitle As String, ByVal ImgIndex As Integer, ByVal bgColor As Color, ByVal frColor As Color, ByVal cFlag As Boolean) Dim Srnumber As Integer [code]. Apr 19, 2012 I'm calling a c++ dll I made myself - and it appears to be very VERY not thread safe! I'm referencing it like this _ Public Shared Function firstIndexOfKeyword(ByVal s As String, ByVal substr As String(), ByVal substrLength As Integer, ByVal markers As Integer()) As Integer End Function Is there a way to make this IMPORT create something more threadsafe?