.net

WPF ListBox's scrollviewer customizable so that there is no Scrollbar, only RepeatButtons

Hi I would like to customize the scrollbars of a listbox's scrollviewer in such a way that the scrollbar only consists of a RepeatButton for scrolling up and a Repeatbutton for scrolling down. Nothing else. There should be no scrollbar (track) between the buttons. One button should be to the left of the ItemsPanel (scroll up) and the oth...

How are .NET 4 GUIDs generated?

I am aware of the multitude of questions here as well as Raymond's excellent (as usual) post. However, since the algorithm to create GUIDs was changed apparently, I found it hard to get my hands on any up-to-date information. The MSDN seems to try and provide as few information as possible. What is known about how GUIDs are generated in...

Find cheapest price for X number of days

Hey 'FLow. I have a technical challenge for you regarding an algorithm. Lets say I have this list of days and prices: List<ReservationPrice> prices = new List<ReservationPrice>(); prices.Add(new ReservationPrice { NumberOfDays = 1, Price = 1000 }); prices.Add(new ReservationPrice { NumberOfDays = 2, Price = 120...

Starting to construct a data access layer. Things to consider?

Our organisation uses inline sql. We have been tasked with providing a suitable data access layer and are weighing up the pro's and cons of which way to go... Datasets ADO.net Linq Entity framework Subsonic Other? Some tutorials and articles I have been using for reference: http://www.asp.net/(S(pdfrohu0ajmwt445fanvj2r3))/learn/dat...

Adding Event Handler to DropDownList inside GridView - how to?

Hi, I have DropDownList inside GridView. Now I would like to add event handler for dropdownlist which would react on SelectedIndexChanged. I'm nesting DropDownList inside GridView by using RowDataBound event for GridView. (http://www.highoncoding.com/Articles/169_DropDownList_Inside_GridView__Method_1_.aspx) Can anybody help me, and tel...

Find a part of UNC path and put in a variable?

I am trying to peel off the last part of a unc path that is being passed and put it in a variable to use in a method further down the line. Example path would be --> \\ourfileserver\remoteuploads\countyfoldername\personfoldername How do I peel just the countyfoldername out of that? I had thought to try var th = e.FullPath.LastIndexO...

problem in using Distinct with Linq

Hi Everyone, Hi have an issue with Linq. I have an array of double values with duplicate entries. I want to extract only distinct values from it. I have the following code which doesn't work correctly. double[] dIds = GetIds(); //dIds has more than 10,000 items var itemIdCollection = from id in dIds.Distinct() selec...

Setup Project in Visual Studio 2010 Requires .NET 4.0

When setting up a Setup Project in Visual Studio 2010 and even to I removing all the prerequistes .NET 4.0 is still required on the computer that runs the Installation. Deploying with ClickOnce works but is not an option, but at least it doesn't ask for .NET 4.0. Is there a way to create a Setup Project in Visual Studio 2010 that doesn'...

"Unrecognized configuration section exceptionHandling" in WCF service when using Enterprise Library

I am working on a WCF service and want to use the Enterprise Library ExceptionHandling block to send the fault message back to the client but I am running into a problem. I have found very little on the web about this error. I added the exceptionHandling block to the web.config and also a reference to exceptionHandling in the configSec...

How do I assign a value to a MailMessage ReplyTo property?

I want to set the ReplyTo value for a .NET MailMessage. MailMessage.ReplyTo Property: ReplyTo is obsoleted for this type. Please use ReplyToList instead which can accept multiple addresses. MailMessage.ReplyToList Property: Gets or sets the list of addresses to reply to for the mail message. But, ReplyToList is ReadOn...

Excel Add-in memory explosion

I wrote a small .NET add in to excel 2007 that read data from external c++ api and display it inside an excel. The task manager shows that I'm having a memory leak (the memory usage is inflate linearly up to 250MB after whitch it throws an "Excel cannot complete this task with available resources error") but the problem disappears as soo...

Can I configure a strongly typed data set to use nullable values?

If I have a strongly typed data table with a column for values of type Int32, and this column allows nulls, then I'll get an exception if I do this for a row where the value is null: int value = row.CustomValue; Instead I need to do this: if (!row.IsCustomValueNull()) { int value = row.CustomValue; // do something with this v...

Counting number of GC cleanups on an object

How do I keep a count of the number of times that objects of a specific class (type?) are getting disposed in the lifetime of my application. Imagine I have a class A, now, I want to count how many times the objects of A get collected by the GC. I hope I am phrasing this right because I was asked this in an interview today and the answ...

Is AsParallel() good practice in a web environment?

I have no doubt that for client applications, AsParallel() will bring some out-of-the-box performance gains. But what if I would use it in a web environment. Let's say I have a widget framework that loops over all widgets to get their data and render output. This would parallelize great no? I do have my doubts on using AsParallel() in t...

Best Practices for working with files via c#

Application I work on generates several hundreds of files (csv) in a 15 minutes period of times. and the back end of the application takes these files and process them (updates database with those values). One problem is database locks. What are the best practices on working with several thousands of files to avoid locking and efficient...

Is there any difference between Spring and Spring.net?

Hello, I've been using Spring with Java and I've seen that there is a version called Spring.NET. I wonder if there is any significant difference between them (apart from that one is for Java and the other is for .NET). Is it just a "language translation" of the framework or are they different project with just a similar purpose? Thanks...

WindowsIdentity.GetCurrent() returns SYSTEM when ran from custom action

I have an install project (running on Windows 7) that launches a custom action at commit which starts the application that was just installed. During the startup of this application I have a method that checks the current user's name to perform some authentication. When launched from this custom action I am getting 'NTAUTHORITY\SYSTEM'...

How to Best Setup a Website Project in VS.NET

I have very little experience with setting up a website from scratch in a .NET environment. As I am doing this now, I am wondering - what's the best way to go? Is it better to create a new Website Project, and include the various backend services and database code as part of that project, or is it better to split out the various aspect...

C# Changing class method at run-time

Hi, I need to extend the behavior of an instance, but I don't have access to the original source code of that instance. For example: /* I don't have the source code for this class, only the runtime instance */ Class AB { public void execute(); } in my code I would to intercept every call to execute, compute some sutff and then call...

Generic unboxing of boxed value types

I have a generic function that is constrained to struct. My inputs are boxed ("objects"). Is it possible to unbox the value at runtime to avoid having to check for each possible type and do the casts manually? See the above example: public struct MyStruct { public int Value; } public void Foo<T>(T test) ...