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  • .net Value Class sorting with IComparable

    - by greggorob64
    I'm running into an issue using a DataGridView bound to a iBindingListView implementation (third party dll) attached to a large collection. There's a certain property in my collection type, named MyDateTime, which is a value class similar to DateTime, but also with some legacy code. This VALUE CLASS implements iComparable, iComparable<T>, and iEquatable<T>. The issue I'm having is this: When I apply a sort to the iBindingListView, or the Automatic Sorting provided by the DGV on the MyDateTimeColumn, it ALWAYS uses the non-generic iComparer, causing hundreds of thousands of unnecessary boxing and unboxing. When I remove the non-generic iComparer, the generic one is still not used, it just does a string compare on the .ToString(). Am I missing something? Why is my generic comparer not bieng called on a sort?

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  • What is a NullReferenceException in .NET?

    - by John Saunders
    (I'm creating this separate question and answer because every question we get on NullReferenceException is really the same) I have some code and when it executes, it throws a NullReferenceException, saying, "Object reference not set to an instance of an object.". What does this mean, and what can I do about it? Note again, that this is a question meant to focus answers to the canonical "what is a NullReferenceException and why did I get one" question. I do know what a NullReferenceException is, as my answer below demonstrates.

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  • [.NET Remoting] Mixing secure & unsecure channels

    - by user305023
    I am unable to use an unsecure channel once a secure channel has already been registered. The code below works only if on the client side, the unsecured channel is registered before. Is it possible to mix secure and unsecure channels without any contraints on the registration order ? using System; using System.Collections; using System.Runtime.Remoting; using System.Runtime.Remoting.Channels; using System.Runtime.Remoting.Channels.Tcp; public class SampleObject : MarshalByRefObject { public DateTime GetTest() { return DateTime.Now; } } public class SampleObject2 : MarshalByRefObject { public DateTime GetTest2() { return DateTime.Now; } } static class ProgramClient { private static TcpClientChannel RegisterChannel(bool secure, string name, int priority) { IDictionary properties = new Hashtable(); properties.Add("secure", secure); properties.Add("name", name); properties.Add("priority", priority); var clientChannel = new TcpClientChannel(properties, null); ChannelServices.RegisterChannel(clientChannel, false); return clientChannel; } private static void Secure() { RegisterChannel(true, "clientSecure", 2); var testSecure = (SampleObject2)Activator.GetObject(typeof(SampleObject2), "tcp://127.0.0.1:8081/Secured.rem"); Console.WriteLine("secure: " + testSecure.GetTest2().ToLongTimeString()); } private static void Unsecure() { RegisterChannel(false, "clientUnsecure", 1); var test = (SampleObject)Activator.GetObject(typeof(SampleObject), "tcp://127.0.0.1:8080/Unsecured.rem"); Console.WriteLine("unsecure: " + test.GetTest().ToLongTimeString()); } internal static void MainClient() { Console.Write("Press Enter to start."); Console.ReadLine(); // Works only in this order Unsecure(); Secure(); Console.WriteLine("Press ENTER to end"); Console.ReadLine(); } } static class ProgramServer { private static TcpServerChannel RegisterChannel(int port, bool secure, string name) { IDictionary properties = new Hashtable(); properties.Add("port", port); properties.Add("secure", secure); properties.Add("name", name); //properties.Add("impersonate", false); var serverChannel = new TcpServerChannel(properties, null); ChannelServices.RegisterChannel(serverChannel, secure); return serverChannel; } private static void StartUnsecure() { RegisterChannel(8080, false, "unsecure"); RemotingConfiguration.RegisterWellKnownServiceType(typeof(SampleObject), "Unsecured.rem", WellKnownObjectMode.Singleton); } private static void StartSecure() { RegisterChannel(8081, true, "secure"); RemotingConfiguration.RegisterWellKnownServiceType(typeof(SampleObject2), "Secured.rem", WellKnownObjectMode.Singleton); } internal static void MainServer() { StartUnsecure(); StartSecure(); Console.WriteLine("Unsecure: 8080\n Secure: 8081"); Console.WriteLine("Press the enter key to exit..."); Console.ReadLine(); } } class Program { static void Main(string[] args) { if (args.Length == 1 && args[0] == "server") ProgramServer.MainServer(); else ProgramClient.MainClient(); } }

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  • How to Display a Bmp in a RTF control in VB.net

    - by Gerolkae
    I Started with this C# Question I'm trying to Display a bmp image inside a rtf Box for a Bot program I'm making. This function is supposed to convert a bitmap to rtf code whis is inserted to another rtf formatter srtring with additional text. Kind of like Smilies being used in a chat program. For some reason the output of this function gets rejected by the RTF Box and Vanishes completly. I'm not sure if it the way I'm converting the bmp to a Binary string or if its tied in with the header tags 'returns the RTF string representation of our picture Public Shared Function PictureToRTF(ByVal Bmp As Bitmap) As String Dim stream As New MemoryStream() Bmp.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp) Dim bytes As Byte() = stream.ToArray() Dim str As String = BitConverter.ToString(bytes, 0).Replace("-", String.Empty) 'header to string we want to insert Using g As Graphics = Main.CreateGraphics() xDpi = g.DpiX yDpi = g.DpiY End Using Dim _rtf As New StringBuilder() ' Calculate the current width of the image in (0.01)mm Dim picw As Integer = CInt(Math.Round((Bmp.Width / xDpi) * HMM_PER_INCH)) ' Calculate the current height of the image in (0.01)mm Dim pich As Integer = CInt(Math.Round((Bmp.Height / yDpi) * HMM_PER_INCH)) ' Calculate the target width of the image in twips Dim picwgoal As Integer = CInt(Math.Round((Bmp.Width / xDpi) * TWIPS_PER_INCH)) ' Calculate the target height of the image in twips Dim pichgoal As Integer = CInt(Math.Round((Bmp.Height / yDpi) * TWIPS_PER_INCH)) ' Append values to RTF string _rtf.Append("{\pict\wbitmap0") _rtf.Append("\picw") _rtf.Append(Bmp.Width.ToString) ' _rtf.Append(picw.ToString) _rtf.Append("\pich") _rtf.Append(Bmp.Height.ToString) ' _rtf.Append(pich.ToString) _rtf.Append("\wbmbitspixel24\wbmplanes1") _rtf.Append("\wbmwidthbytes40") _rtf.Append("\picwgoal") _rtf.Append(picwgoal.ToString) _rtf.Append("\pichgoal") _rtf.Append(pichgoal.ToString) _rtf.Append("\bin ") _rtf.Append(str.ToLower & "}") Return _rtf.ToString End Function

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  • Fast search in XMl files in .NET (or How to index XML files)

    - by codymanix
    I have to implement a search feature which is able to quickly perform arbitrary complex queries to XML-data. If the user makes a query, all XML files must be searched to find possible matches. The users will have lots of XML-Files (a few 10000 or more) which are typically a few kilobytes in size. All the XML-files have almost the same structure. I already benchmarked XPath, it is too slow for my needs. How can it be done most efficiently? Is is possible to create indexes for the contents of the XML files (preserving content semantics, not just plain fulltext search)? Will it be useful to put the XML data into an (embedded) SQL database and do the queries with SQL? What other possibilities do I have?

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  • How to make designer generated .Net application settings portable

    - by Ville Koskinen
    Hello, I've been looking at modifying the source of the Doppler podcast aggregator with the goal of being able to run the program directly from my mp3 player. Doppler stores application settings using a Visual Studio designer generated Settings class, which by default serializes user settings to the user's home directory. I'd like to change this so that all settings would be stored in the same directory as the exe. It seems that this would be possible by creating a custom provider class which inherits the SettingsProvider class. Has anyone created such a provider and would like to share code? Update: I was able to get a custom settings provider nearly working by using this MSDN sample, i.e. with simple inheritance. I was initially confused as Windows Forms designer stopped working until I did this trick suggested at Codeproject: internal sealed partial class Settings { private MySettingsProvider settingsprovider = new MySettingsProvider(); public Settings() { foreach (SettingsProperty property in this.Properties) { property.Provider = settingsprovider; } ... The program still starts with window size 0;0 though. Anyone with any insight to this? Why the need to assing the provider in runtime---instead of using attributes as suggested by MSDN? Why the changes in how the default settings are passed to the application with the default settings provider vs. the custom one?

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  • Unit of Work Pattern in .Net

    - by Jazza
    Does anyone have any concrete examples of a simple Unit of Work pattern in C# or Visual Basic that would handle the following scenario? I'm writing a WinForms application in which a customer can have multiple addresses associated with it. The user can add, edit and delete addresses belonging to the customer before the customer is saved back to the database. Therefore, at the time of saving, all the original addresses need to be deleted from the database and the new addresses added in a single transaction.

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  • Using .NET XmlSerializer with get properties and setter functions

    - by brone
    I'm trying to use XmlSerializer from C# to save out a class that has some values that are read by properties (the code being just a simple retrieval of field value) but set by setter functions (since there is a delegate called if the value changes). What I'm currently doing is this sort of thing. The intended use is to use the InT property to read the value, and use SetInT to set it. Setting it has side-effects, so a method is more appropriate than a property here. XmlSerializationOnly_InT exists solely for the benefit of the XmlSerializer (hence the name), and shouldn't be used by normal code. class X { public double InT { get { return _inT; } } public void SetInT(double newInT) { if (newInT != _inT) { _inT = newInT; Changed();//includes delegate call; potentially expensive } } private double _inT; // not called by normal code, as the property set is not just a simple // field set or two. [XmlElement(ElementName = "InT")] public double XmlSerializationOnly_InT { get { return InT; } set { SetInT(value); } } } This works, it's easy enough to do, and the XML file looks like you'd expect. It's manual labour though, and a bit ugly, so I'm only somewhat satisfied. What I'd really like is to be able to tell the XML serialization to read the value using the property, and set it using the setter function. Then I wouldn't need XmlSerializationOnly_InT at all. I seem to be following standard practise by distinguishing between property sets and setter functions in this way, so I'm sure I'm not the only person to have encountered this (though google suggests I might be). What have others done in this situation? Is there some easy way to persuade the XmlSerializer to handle this sort of thing better? If not, is there perhaps some other easy way to do it?

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  • Jabber .net rostertree error

    - by Farooq
    Hi, Whenever I add the rostertree control to my form, I can see that the PresenceManager and RosterManager property values for it have this error listed: "Unable to cast object of type 'System.Windows.Forms.DataGridViewTextBoxColumn' to type 'System.ComponentModel.Component'." I can compile the solution and all but this error keeps popping up randomly. Can someone advice when this may happen. I'm thinking it has to do with the controls not being added properly. I'm using Visual Studio 2008. Thanks.

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  • How to debug .net error where message is masked in Ajax call

    - by Matt Thrower
    Hi, I'm currently working on a page which makes use of the MS Ajax UpdatePanel. However I've run into a strange problem. If I simply compile and view my page, one of the button click events results in an error. However, because the button affects items inside an UpdatePanel the actual exception is hidden from me: all I'm getting is a HTTP 500 error returned to me through the UpdatePanel Javascript. What's odd about this is that if I step through the code line by line in Visual Studio, I don't get the error. The button doesn't cause the behaviour I'm expecting, but it throws no errors. Because the step through isn't causing an error to be thrown, I'm at a loss how I can get to the actual exception message so I can find out where the error is being thrown and debug it. Suggestions gratefully received. Cheers, Matt

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  • .net ViewState in page lifecycle

    - by caltrop
    I have a page containing a control called PhoneInfo.ascx. PhoneInfo is dynamically created using LoadControl() and then the initControl() function is called passing in an initialization object to set some initial textbox values within PhoneInfo. The user then changes these values and hits a submit button on the page which is wired up to the "submit_click" event. This event invokes the GetPhone() function within PhoneInfo. The returned value has all of the new user entered values except that the phoneId value (stored in ViewState and NOT edited by the user) always comes back as null. I believe that the viewstate is responsible for keeping track of user entered data across a postback, so I can't understand how the user values are coming back but not the explicitly set ViewState["PhoneId"] value! If I set the ViewState["PhoneId"] value in PhoneInfo's page_load event, it retrieves it correctly after the postback, but this isn't an option because I can only initialize that value when the page is ready to provide it. I'm sure I am just messing up the page lifecycle somehow, any suggestion or questions would really help! I have included a much simplified version of the actual code below. Containing page's codebehind protected void Page_Load(object sender, EventArgs e) { Phone phone = controlToBind as Phone; PhoneInfo phoneInfo = (PhoneInfo)LoadControl("phoneInfo.ascx"); //Create phoneInfo control phoneInfo.InitControl(phone); //use controlToBind to initialize the new control Controls.Add(phoneInfo); } protected void submit_click(object sender, EventArgs e) { Phone phone = phoneInfo.GetPhone(); } PhoneInfo.ascx codebehind protected void Page_Load(object sender, EventArgs e) { } public void InitControl(Phone phone) { if (phone != null) { ViewState["PhoneId"] = phone.Id; txt_areaCode.Text = SafeConvert.ToString(phone.AreaCode); txt_number.Text = SafeConvert.ToString(phone.Number); ddl_type.SelectedValue = SafeConvert.ToString((int)phone.Type); } } public Phone GetPhone() { Phone phone = new Phone(); if ((int)ViewState["PhoneId"] >= 0) phone.Id = (int)ViewState["PhoneId"]; phone.AreaCode = SafeConvert.ToInt(txt_areaCode.Text); phone.Number = SafeConvert.ToInt(txt_number.Text); phone.Type = (PhoneType)Enum.ToObject(typeof(PhoneType), SafeConvert.ToInt(ddl_type.SelectedValue)); return phone; } }

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  • Is it possible to reference the Azure SDK 1.1 Microsoft.WindowsAzure.* assemblies from a .NET 4.0 Cl

    - by tjrobinson
    I have a WPF application targetting the .NET 4.0 Client Profile which needs to use the Microsoft.WindowsAzure.* assemblies provided in the Windows Azure SDK 1.1. The problem is that these assemblies have a runtime version of v2.0.50727. I am able to add references to them from my WPF project but they're not recognised. I've read about the side by side execution capabilities of .NET 4.0 but does this require both the .NET 2.0 and the .NET 4.0 frameworks to be installed? Is there anything from Microsoft on when a new SDK might be available that contains assemblies targeting .NET 4.0?

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  • Internationalize HelloWorld program .NET

    - by RockStarInTraining
    I have small test app which has 2 resource files (Resources.resx & Resources.de-DE.resx) with the same exact string names, but one has the strings converted to German. For my form I set the Localize property to ture. In my application I am getting the strings as such: this.Text = Properties.Resources.frmCaption; In my release folder I get a de-DE folder with a dll named International_test.resources.dll. I try to distribute this to a machine which is set to German and all of the strings pulled are still english. I tried keeping the International_test.resources.dll in the de-DE folder or just put in in my apps directory. What am I doing wrong or what do I need to do to get the German resource file to be used?

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  • What is a .NET app domain?

    - by Luke
    In particular, what are the implications of running code in two different app domains? How is data normally passed across the app domain boundary? Is it the same as passing data across the process boundary? I'm curious to know more about this abstraction and what it is useful for. EDIT: Good existing coverage of AppDomains in general at http://stackoverflow.com/questions/622516/i-dont-understand-appdomains

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  • Reading an XML File with .NET

    - by Daywalker21
    I am new to xml and unable to find a way to get content in between tags. My XML file is <?xml version="1.0" encoding="utf-8"?> <block1> <file name="c:\w0.xml"> <word>Text</word> <number>67</number> </file> <file name="c:\w1.xml"> <word>Text</word> <number>67</number> </file> <file name="c:\w2.xml"> <word>Text</word> <number>67</number> </file> </block1>

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  • How should moq's VerifySet be called in VB.net

    - by Bender
    I am trying to test that a property has been set but when I write this as a unit test: moqFeed.VerifySet(Function(m) m.RowAdded = "Row Added") moq complains that "Expression is not a property setter invocation" My complete code is Imports Gallio.Framework Imports MbUnit.Framework Imports Moq <TestFixture()> Public Class GUI_FeedPresenter_Test Private moqFeed As Moq.Mock(Of IFeedView) <SetUp()> Sub Setup() moqFeed = New Mock(Of IFeedView) End Sub <Test()> Public Sub New_Presenter() Dim pres = New FeedPresenter(moqFeed.Object) moqFeed.VerifySet(Function(m) m.RowAdded = "Row Added") End Sub End Class Public Interface IFeedView Property RowAdded() As String End Interface Public Class FeedPresenter Private _FeedView As IFeedView Public Sub New(ByVal feedView As IFeedView) _FeedView = feedView _FeedView.RowAdded = "Row Added" End Sub End Class I can't find any examples of moq in VB, I would be grateful for any examples.

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  • .NET PostSubmitter sends backslashes

    - by Stefan N.
    Hi, I'm using C# to send JSON to a PHP-Script, like this: string json = "{"; json += "\"prop\":\"some text\""; json += "}"; PostSubmitter post = new PostSubmitter(); post.Url = "http://localhost/synch/notein.php"; post.Type = PostSubmitter.PostTypeEnum.Post; post.PostItems.Add("note", json); post.Post(); Of course I'll have to escape the inner quotes, but they get sended to the script! To make things worse: There is text, which already has quotation marks, so those must be escaped to be valid JSON. In this case I want the backslashes to be transmitted. Any idea to accomplish this?

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  • Recommended library for linear programming in .Net?

    - by tbone
    Can anyone recommend a library - free, or commercial but affordable ( There are some listed here: http://en.wikipedia.org/wiki/Linear_programming#Solvers_and_scripting_.28programming.29_languages I am just starting out with LP and hope someone can recommend something. I am trying to basically minimize pricing for cell phone subscription services.

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  • .NET CF -- Set Form height based on InputPanel state

    - by user354941
    Hi, So, I've got a C# project for Windows Mobile phones and I'm trying to work with the InputPanel. Specifically, I've got one form with a stack of Labels and TextBoxes that collect user input. I have an InputPanel that alerts me when the user opens the SIP. Everything works fine so far. When I get messages that the SIP status has changed, I want to change the height of the Form, which doesn't seem possible. Here's my event handler for my InputPanel: void m_InputPanel_EnabledChanged(object sender, EventArgs e) { // :( this assignment operation doesn't work and it doesn't this.ClientSize = inputPanel1.VisibleDesktop.Size; // doesn't work this.Size = inputPanel1.VisibleDesktop.Size; // assignment operation works, but isn't very useful this.visibleHeight = inputPanel1.VisibleDesktop.Height; this.InitializeUI(); } When I say that the assignment operation doesn't work, I mean that the values don't change in the debugger. I can understand that maybe I can't change the size of a Form, but I can't understand why trying to change it wouldn't throw an exception, or give a compiler error. I have my Form WindowState set to Normal instead of Maximized, but it doesn't make a difference. Also, I have read http://www.christec.co.nz/blog/archives/42 this page that tells me how I'm supposed to do this, but I can't easily put all of my controls in a Panel because I'm using a bunch of custom stuff to do alpha background controls.

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