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• Generics in custom configuration sections

  - by Jonn

  I tried making a custom configuration class that went on like this: WatcherServiceInfoSection<TWatcherServiceDetailElement> where TWatcherServiceDetailElement is a ConfigurationElement inside it. Now when I call the type in the ConfigSections area of AppConfig I get the error: An error occurred creating the configuration section handler for WatcherServiceInfo: Could not load type 'Library.Common.Utilities.ConfigurationHandler.WatcherServiceInfoSection<ASNDPService.Configuration.WatcherServiceDetailElement>' from assembly Is what I'm doing possible? Can I have generic types in the type attribute for a custom section element? EDIT Additionally, how about ConfigurationElementCollection objects? Like in the above example, how could I do a [ConfigurationProperty("WatcherServiceDetails", IsRequired = true, IsDefaultCollection = true)] [ConfigurationCollection(typeof(TWatcherServiceDetailElement), AddItemName = "WatcherServiceDetail")] public WatcherServiceDetailCollection<TWatcherServiceDetailElement> WatcherServiceDetails I'm aware that type parameters aren't allowed for attributes and that's what I want to know how to do.

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• PropertyInfo SetValue and nulls

  - by Nelson

  If I have something like: object value = null; Foo foo = new Foo(); PropertyInfo property = Foo.GetProperties().Single(p => p.Name == "IntProperty"); property.SetValue(foo, value, null); Then foo.IntProperty gets set to 0, even though value = null. It appears it's doing somemething like IntProperty = default(typeof(int)). I would like to throw an InvalidCastException if IntProperty is not a "nullable" type (Nullable< or reference). I'm using Reflection, so I don't know the type ahead of time. How would I go about doing this?

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• Error in Using Dynamic Data Entities WebSite in VS2012

  - by amin behzadi

  I decided to use Dynamic Data Entities website in vs2012. So, I created this website,then added App_Code directory and added a new edmx to it and named it myDB.edmx. After that I uncommented the code line in global.asax which registers the entity context : DefaultModel.RegisterContext(typeof(myDBEntities), new ContextConfiguration() { ScaffoldAllTables = true }); But when I run the website this error occurs : The context type 'myDBEntities' is not supported. how can I fix it? p.s: You now there are some differences between using L2S by Dynamic Data L2S website AND using entity framework by Dynamic Data Entities website.

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• ...may not be used in this context...while serialization

  - by phenevo

  Hi, I've webservice and WebMethod [webMethod] public object GetObjects(Cars[] cars) { return Translator.ToObjects(Facade.GetObjects(cars); } public static object GetObjects(Cars cars) { List<Car> cars =new List<Country(...fillingcollection) return cars.ToArray(), } public static object ToObjects(object collection) { if(collection is Car[]) { return ConvertModelCarsToContractCars(collection), } public ModelCar[] ConvertModelCarsToContractCars(Cars[] collection) { ...there is rewriting pool... } And I get exception at side of client: There was an error generating the XML document. I'm using this function to check collection which I would send to the client and it works, doesn't return exceptions: public static void SerializeContainer(object obj) { try { // Make sure even the construsctor runs inside a // try-catch block XmlSerializer ser = new XmlSerializer(typeof(object)); TextWriter w = new StreamWriter(@"c:\list.xml"); ser.Serialize(w, obj); w.Close(); } catch (Exception ex) { DumpException(ex); } } Interesting is when collection has only One element [webmethod] works fine, but when is more it brokes

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• Reading an embedded file from an ASP.NET Custom Server Control an rendering it

  - by Andreas Grech

  I currently have a file "abc.htm" in my Custom Server Control Project and it's Build Action is set to Embedded Resource. Now in the RenderContents(HtmlTextWriter output) method, I need to read that file and render it on the website. I am trying the following but it's to no avail: protected override void RenderContents(HtmlTextWriter output) { var providersURL = Page.ClientScript.GetWebResourceUrl(typeof (OpenIDSel), "OpenIDSelector.Providers.htm"); var fi = new FileInfo(providersURL); // <- exception here //the remaining code is to possibly render the file } This is an example of how the providersURL is: /WebResource.axd?d=kyU2OiYu6lwshLH4pRUCUmG-pzI4xDC1ii9u032IPWwUzMsFzFHzL3veInwslz8Y0&t=634056587753507131 FileInfo is throwing System.ArgumentException: Illegal characters in path.

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• DisplayName attribute from Resources?

  - by Palantir

  Hello! I have a localized application, and I am wondering if it is possible to have the DisplayName for a certain model property set from a Resource. I'd like to do something like this: public class MyModel { [Required] [DisplayName(Resources.Resources.labelForName)] public string name{ get; set; } } But I can't to it, as the compiler says: "An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type" :( Are there any workarounds? I am outputting labels manually, but I need these for the validator output!

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• PowerPoint.Application not raising events in C#

  - by AdmSteck

  I have a simple application written in C# and .Net 2.0 that displays several PowerPoint 2003 files in a loop. (It is going to be used for a information board in our cafeteria) The application works fine on my development machine but when I deploy it to another machine the events I have registered for SlideShowNextSlide and PresentationClose are never fired. I have tried registering the events with this method. private void InitPPT() { app.SlideShowNextSlide += new Microsoft.Office.Interop.PowerPoint.EApplication_SlideShowNextSlideEventHandler(app_SlideShowNextSlide); app.PresentationClose += new Microsoft.Office.Interop.PowerPoint.EApplication_PresentationCloseEventHandler(app_PresentationClose); app.SlideShowEnd += new Microsoft.Office.Interop.PowerPoint.EApplication_SlideShowEndEventHandler(app_PresentationClose); } And with this method that I found here: private void InitPPT() { IConnectionPointContainer oConnPointContainer = (IConnectionPointContainer)app; Guid guid = typeof(Microsoft.Office.Interop.PowerPoint.EApplication).GUID; oConnPointContainer.FindConnectionPoint(ref guid, out m_oConnectionPoint); m_oConnectionPoint.Advise(this, out m_Cookie); } Do I need to register some dll's on the client machine or am I missing something.

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• How to set xmlns when serializing object in c#

  - by John

  I am serializing an object in my ASP.net MVC program to an xml string like this; StringWriter sw = new StringWriter(); XmlSerializer s = new XmlSerializer(typeof(mytype)); s.Serialize(sw, myData); Now this give me this as the first 2 lines; <?xml version="1.0" encoding="utf-16"?> <GetCustomerName xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> my question is, How can I change the xmlns and the encoding type, when serializing? Thanks

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• .net Attributes that handle exceptions - usage on a property accessor

  - by Mr AH

  Hi, well I know from my asp.net mvc experience that you can have attributes that handle exceptions (HandleErrorAttribute). As far as I can tell the Controller class has some OnException event which may be integral to this behaviour. However, I want to do something similar in my own code: dream example: public String MyProperty { [ExceptionBehaviour(typeof(FormatException), MyExEnum.ClearValue)] set { _thing.prop = Convert.ToThing(value); } } .... The code above obviously makes very little sense, but is close to the kind of thing I wish to do. I want the attribute on the property set accessor to catch some type of exception and then deal with this in some custom way (or even just swallow it). Any ideas guys?

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• Modifying a global variable from <a href>

  - by a_m0d

  I have created some code to popup a confirm dialog if a user tries to leave a page without saving their changes. However, I don't want the confirmation dialog to popup if the user has clicked the "Save" button. I have some code at the top of my file which looks like this: var confirmClose = false; window.onbeforeunload = function(evt) { if (confirmClose == true) { message = "There are unsaved changes on this page. Are you sure you wish to leave?"; if (typeof evt == 'undefined') { evt = window.event; } if (evt) { evt.returnValue = message; } return message; } } Further down on the page I have a link which looks like this: <a href="javascript:confirmClose=false;$('#stockForm').submit()" title="Save" class="button positive" id="stockFormSubmit">Save</a> However, this doesn't seem to work - it doesn't seem to change the value of confirmClose, and changing it to window.confirmClose didn't help either. What am I doing wrong here?

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• XmlSerializer.Serialize doesn't save a file and doesn't throw an exception.

  - by Wodzu

  Hi guys. I am having problem with saving of my object. Take a look at this code: public void SerializeToXML(String FileName) { XmlSerializer fSerializer = new XmlSerializer(typeof(Configuration)); using (Stream fStream = new FileStream(FileName, FileMode.Create, FileAccess.Write, FileShare.None)) { fSerializer.Serialize(fStream, this); } } The problem is that when the user does not have rights to the location on hard disk, this function will not throw me any exception and do not save my file. For example saving to "C:\test.xml" act like nothing happened. And I would like to know if the file has not been saved and it would be good to know the reason why. I know that I could check if the file on given location exists and throw an exception manualy but shouldn't this be done by the XmlSerializer or FileStream itself? Thanks for your time

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• Retain cycle on `self` with blocks

  - by Jonathan Sterling

  I'm afraid this question is pretty basic, but I think it's relevant to a lot of Objective-C programmers who are getting into blocks. What I've heard is that since blocks capture local variables referenced within them as const copies, using self within a block can result in a retain cycle, should that block be copied. So, we are supposed to use __block to force the block to deal directly with self instead of having it copied. __block typeof(self) bself = self; [someObject messageWithBlock:^{ [bself doSomething]; }]; instead of just [someObject messageWithBlock:^{ [self doSomething]; }]; What I'd like to know is the following: if this is true, is there a way that I can avoid the ugliness (aside from using GC)?

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• NHibernate Criteria Transform Result

  - by isuruceanu

  Hi I have an SecurityGroup entity witch has Memebers and Application properties. Application is a lookup. So securityGroups is in many-to-many relationship with User table and one-to-many with LookupApplciation (FK) Now I want to select all application linked to a specific user. I have follow criteria: public IList<LookupApplication> GetApplicationByUser(User user) { return this.Session.CreateCriteria(typeof(SecurityGroup), "sg") .CreateAlias("Members", "u") .CreateAlias("Application", "al") .Add(Restrictions.Eq("u.Id", user.Id)) .List<LookupApplication>(); } It trows an exception The value "Edi.Advance.Core.Model.Security.SecurityGroup" is not of type "Edi.Advance.Core.Model.Lookups.LookupApplication" and cannot be used in this generic collection. Parameter name: value and it is right. How can I transform the result to IList<LookupApplication>? Thanks

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• How do I handle editing of custom types in a C# datagridview?

  - by Ian Hopkinson

  I have a datagridview in which one column contains a custom class, which I have set using: dgvPeriods.Columns[1].ValueType = typeof(ExDateTime); It is rigged up to display correctly by handling the CellFormatting event, but I'm unsure what event to handle for cell editing. In the absence of doing anything I get a FormatException as the datagridview tries to convert String to ExDateTime as I try to move focus out of the edited cell. I tried adding type conversion to my ExDateTime custom class: public static implicit operator ExDateTime(string b) { return new ExDateTime(b); } But this this didn't work. I also tried handling the DataError event, but this seems to fire too late. The datagridview is not databound.

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• How to find the Dynamically added gridview footer control

  - by harold-sota

  I have add controls to my gridview footer, here is the code SGridView.ShowFooter = True For i As Integer = 0 To ctrList.Count Dim ctr As Control = CType(ctrList.Item(i), Control) SGridView.FooterRow.Cells(i + 1).Controls.Add(ctr) Next the ctrList contain Controls textBox, checkbox dropdowlist ect. there is all ok but when i wont to get the text or value or checked value of controls i cant cast the controls in rowcommand event Here is the code: Protected Sub SGridView_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles SGridView.RowCommand If e.CommandName = "Add" Then Dim ctrList As ControlCollection = SGridView.FooterRow.Controls For Each ctr As Control In ctrList If TypeOf ctr Is TextBox Then Dim name As TextBox = CType(ctr, TextBox) Dim val As String = name.Text End If Next End If this excample is for the textBox control. Any idea?

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• How to implement a TypeConverter for a type and property I don't own?

  - by CannibalSmith

  This is annoying: <GeometryDrawing> <GeometryDrawing.Pen> <Pen Brush="Black"/> </GeometryDrawing.Pen> </GeometryDrawing> I want this: <GeometryDrawing Pen="Black"/> So I write a TypeConverter: public class PenConverter : TypeConverter { static readonly BrushConverter brushConverter = new BrushConverter(); public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) return true; return base.CanConvertFrom(context, sourceType); } public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { var s = value as string; if (a != null) { var brush = brushConverter.ConvertFromInvariantString(s) as Brush; return new Pen(brush, 1); } return base.ConvertFrom(context, culture, value); } } Now, how do I link it up with the Pen type? I can't just add a TypeConverterAttribute to it as I don't own it (nor do I own GeometryDrawing.Pen property).

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• Using a Type object to create a generic

  - by Richard Neil Ilagan

  Hello all! I'm trying to create an instance of a generic class using a Type object. Basically, I'll have a collection of objects of varying types at runtime, and since there's no way for sure to know what types they exactly will be, I'm thinking that I'll have to use Reflection. I was working on something like: Type elType = Type.GetType(obj); Type genType = typeof(GenericType<>).MakeGenericType(elType); object obj = Activator.CreateInstance(genType); Which is well and good. ^_^ The problem is, I'd like to access a method of my GenericType< instance, which I can't because it's typed as an object class. I can't find a way to cast it obj into the specific GenericType<, because that was the problem in the first place (i.e., I just can't put in something like:) ((GenericType<elType>)obj).MyMethod(); How should one go about tackling this problem? Many thanks! ^_^

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• Getting all types from an assembly derived from a base class

  - by CaptnCraig

  I am trying to examine the contents of an assembly and find all classes in it that are directly or indirectly derived from Windows.Forms.UserControl. I am doing this: Assembly dll = Assembly.LoadFrom(filename); var types = dll.GetTypes().Where(x => x.BaseType == typeof(UserControl)); But it is giving an empty list because none of the classes directly extend UserControl. I don't know enough about reflection to do it quickly, and I'd rather not write a recursive function if I don't have to.

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• Have parameters in Dao methods to get entities the most efficient way for read-only access

  - by Blankman

  Allot of my use of hibernate, at least for that data that is presented on many parts of the web application, is for read-only purposes. I want to add some parameters to my Dao methods so I can modify the way hibernate pulls the data and how it handles transactions etc. Example usage: Data on the front page of my website is displayed to the users, it is read-only, so I want to avoid any session/entity tracking that hibernate usually does. This is data that is read-only, will not be changed in this transaction, etc. What would be the most performant way to pull the data? (the code below is c#/nhibernate, I'm implementing this in java as I learn it) public IList<Article> GetArticles() { return Session.CreateCriteria(typeof(Article)) // some where cluase }

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• Accessing wrapped method attribute in C#

  - by prostynick

  I have following code: public static void ProcessStep(Action action) { //do something here if (Attribute.IsDefined(action.Method, typeof(LogAttribute))) { //do something here [1] } action(); //do something here } For easy use I have some similar methods using method above. For example: public static void ProcessStep(Action<bool> action) { ProcessStep(() => action(true)); //this is only example, don't bother about hardcoded true } But when I use the second method (the one above), even if original action had attribute, code [1] will not be executed. How can I find if method is only wrapper and underlying method contains attribute and how to access this attribute?

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• How can I push a string from one client connected to a WCF service to another connected as well?

  - by Sergio Tapia

  Here's what I have so far: IService: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel; namespace ServiceLibrary { [ServiceContract(SessionMode = SessionMode.Allowed, CallbackContract = typeof(IServiceCallback))] public interface IService { [OperationContract(IsOneWay = false, IsInitiating = true, IsTerminating = false)] void Join(string userName); } interface IServiceCallback { [OperationContract(IsOneWay = true)] void UserJoined(string senderName); } } Service: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ServiceModel; namespace ServiceLibrary { [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Multiple)] public class Service:IService { IServiceCallback callback = null; public void Join(string userName) { callback = OperationContext.Current.GetCallbackChannel<IServiceCallback>(); } } } Just a simple string passed from one client to another.

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• How do I pass a function to NUnit Throws.Constraints?

  - by Serge Belov

  I'm trying to write some NUnit tests in F# and having trouble passing a function to the ThrowsConstraint. A distilled (non)working sample is below. open System.IO open NUnit.Framework [<TestFixture>] module Example = [<Test>] let foo() = let f = fun () -> File.GetAttributes("non-existing.file") Assert.That(f, Throws.TypeOf<FileNotFoundException>()) This compiles just fine but I get the following from the NUnit test runner: FsTest.Tests.Example.foo: System.ArgumentException : The actual value must be a TestDelegate but was f@11 Parameter name: actual While I'm able to work around the problem using ExpectedException attribute, my question is what is the correct way of using an F# function in this situation?

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• stumped on jquery call inside chrome extension

  - by phil swenson

  In my chrome extension I call this: jsonPost = { email:"[email protected]", password:"demo", content: $('#selected_text').val(), notification_type: $('#notification_type').val(), name:$('#notification_name').val() } $.post('http://localhost:3000/api/create.json', jsonPost, function (data) { console.log("type of data = " + typeof(data)); console.log("data in function = " + data); } The data makes it to the server. But the response is lost, in the console ---type of data = String ---data in function = So for some reason I am not getting the response back. Works from the browser. I even tried doing a get against cnn.com and got no response. any ideas? thanks

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• Nhibernate Complex Type binding

  - by user329983

  I have two oracle user defined types: Audit_Type – A normal object with two fields a string and a number Audit_Table_Type – A table of audit_types, (an array) I have a stored procedure that takes as a parameter an Audit_Table_Type. List<Audit_Type> table = new List<Audit_Type>(); var query = session.CreateSQLQuery("call Audit_Rows(Audit_Table_Type(:table))") .SetParameterList("table", table, NHibernateUtil.Custom(typeof(AuditTypeUDT))) This is what I did intuativly created the ICompositeType and just set in a list of them in but this gives me nothing close to what I wanted. I couldn’t figure out how to bind to a table at all. I have built the inline sql that would do this for me but it would destroy my shared pool (not using binds). So a General question how do I bind to complex/composite types using Nhibernate?

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• NHibernate: how to do lookup a specific date

  - by Daoming Yang

  How I can lookup a specific date in Nhibernate? I'm currently using this to lookup one day's order. ICriteria criteria = SessionManager.CurrentSession.CreateCriteria(typeof(Order)) .Add(Expression.Between("DateCreated", date.Date.AddDays(-1), date.Date.AddDays(1))) .AddOrder(NHibernate.Criterion.Order.Desc("OrderID")); I tried the following code, but they did bring the data for me. Expression.Eq("DateCreated", date) Expression.Like("DateCreated", date) Note: The pass in date value will be like this 2010-04-03 00:00:00, The actual date value in the database will be like this 2010-03-13 11:17:16.000 Can anyone let me know how to do this? Many thanks.

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