.net

Strange, regex.split Method matches one null element

Regex rx = new Regex(@"[+-]"); string[] substrings = rx.Split(expression); expression = "-9a3dcbh-3bca-4ab4cf-3hc" //This is the iput string I want to split that string between + or -. My VS debugger shows substring array like this: substrings[0] = null //???Why substrings[1] = 9a3dcbh substrings[2] = 3bca substrings[3] = 4ab4...

"Attach or Add an entity that is not new...loaded from another DataContext. This is not supported." Problem on insert of linker object.

Similar error as other questions, but not quite the same, I am not trying to attach anything. What I am trying to do is insert a new row into a linking table, specifically UserAccomplishment. Relations are set in LINQ to User and Accomplishment Tables. I have a generic insert function: Public Function insertRow(ByVal entity As Impleme...

Optimize conditional operators branching in C#

Hello. I have next code: return this.AllowChooseAny.Value ? radioSpecific.Checked ? UserManager.CurrentUser.IsClient ? txtSubject.Text : subjectDropDownList.SelectedItem.Text : String.Empty : UserManager.CurrentUser.IsClient ? txtSubject.Text : subjectDropDownList.SelectedItem.Text; or in less complex...

LINQ Single vs First

LINQ: Is it more efficient to use the Single() operator over First() when ever I know for certain that the query will return a single record? Is there a difference? ...

How to use variables with regex?

This is the input string: 23x^45*y or 2x^2 or y^4*x^3. I am matching ^[0-9]+ after letter x. In other words I am matching x followed by ^ followed by numbers. Problem is that I don't know that I am matching x, it could be any letter that I stored as variable in my char array. For example: foreach (char cEle in myarray) // cEle is lett...

Need to replace 3rd party WinForm controls, what's the closet WPF equivalent?

I am tired of Windows Forms...I just am. I am not trying to start a debate on it I am just bored with it. Unfortunately we have become dependent on 4 controls in DevExpress XtraEditors. I have had nothing but difficulties with them and I want to move on. What I need now is what the closet replacement would be for the 4 controls I am ...

Cut and Paste Code Reuse - JavaScript and C#

What is the best tool(s) for tracking down "cut and paste reuse" of code in JavaScript and C#? I've inherited a really big project and the amount of code that is repeated throughout the app is 'epic'. I need some help getting handle on all the stuff that can be refactored to base classes, reusable js libs, etc... If it can plug into Vis...

How to create a test environment for commercial Windows applications?

How do you best test commercial windows .NET applications on different environments? (XP, Vista, Win 7, Terminal server, Citrix) I was thinking of MS Virtual PC, together with some ghosting software like Acronis .. http://www.acronis.com/enterprise/ What are good, tested test setups ? :-) ....................................... Than...

Render page as a picture

I have question to Java or C# programmers. I want to render some pages in various browsers mainly Firefox and IE and save it as a picture. I have not any serious experience in Java/.Net. Is there any libs/tools for such tasks? I thought about some FF extensions for example but I don't know how to do it in IE. Is the in .Net some libs for...

Excel 2010 64 bit can't create .net object

I have a simple class library that I use in Excel. Here is a simplification of my class... using System; using System.Runtime.InteropServices; namespace SimpleLibrary { [ComVisible(true)] public interface ISixGenerator { int Six(); } public class SixGenerator : ISixGenerator { public int Six() { return 6; } } } I...

IAuthenticationRequest.RedirectToProvider is not supposed to return, yet it does

The method DotNetOpenAuth.OpenId.RelyingParty.IAuthenticationRequest.RedirectToProvider() is documented never to return: Redirects the user agent to the provider for authentication. Execution of the current page terminates after this call. However, it does return under the latest implementation (3.4.3). I'm using the followin...

VB .NET DirectCast and Type Reflection

The application that I am working on has a generic Parent Form called RSChild, that is used to perform some operations depending on whether or not the control that is contained within it is in a MdiTabManager or inside of its own modal form. Then the actual User Controls contained within Inherit from a Interface Called ObjectEdit (Object...

Regex file extension filter

I am trying to create a regex that will take all files that do not have a list of extensions. In particular, I am trying to filter out filenames that end in .csv I have browsed around for an hour and been unable to figure this out. I am using .NET Regex. ...

how to convert avi file to an jpg's images array using .net

how to convert avi file to an jpg's images array using .net , i need to develop a task that will take the avi file and save it as jpg images on another folder ...

Need help for a complex linq query

Ok so I've got a DataTable here's the schema DataTable dt = new DataTable(); dt.Columns.Add("word", typeof(string)); dt.Columns.Add("pronunciation", typeof(string)); The table is filled already and I'm trying to make a linq query so that i can output to the console or anywhere something like : Pronunciation...

How to get Assembly Version (not File Version) or another EXE?

You can do the following to get the the File Version: FileVersionInfo versionInfo = FileVersionInfo.GetVersionInfo("filename.exe"); But how do you get the Assembly Version or a specific EXE file? ...

What Date Format Should I Send When Using Oracle.DataAcess.

Converting from usind Micorsofts Syste.Data.OracleClient to what I believe is called Oracles ODT (Oracle.DataAccess 10.2.0.100). When I try and send a date I get this error "ORA-1858: a non-numeric character was found where a numeric was expected". This code worked great using System.Data.OracleClient. cmd.Parameters.Add(New OraclePar...

How to notify table-data change to a client program?

Suppose I have an application that access data resident in a central DB server and more than one user access data from client machines networked with the DB server. Suppose two client machines are running a copy of the application and two users are accessing the same DB table. How can I automatically refresh the data on the GUI, that i...

How can I make a read only version of a class?

I have a class with various public properties which I allow users to edit through a property grid. For persistence this class is also serialized/deserialized to/from an XML file through DataContractSerializer. Sometimes I want to user to be able to save (serialize) changes they've made to an instance of the class. Yet at other times I d...

What is a servicebus and when do I need one?

I have heard talk about the NServiceBus, but I haven't really understood what it is. They claim to be "The most popular open-source service bus for .net". So; what is a "service bus", and when do I need one? ...