.net

问题 Is it possible to execute any user-provided code before the .NET Main method? It would be acceptable if the code had to be unmanaged. The reason for asking is that this might be a way to solve the problem of calling SetCurrentProcessExplicitAppUserModelID before any UI elements are displayed (as mentioned in Grouping separate processes in the Windows Taskbar) 回答1: In C# you can add a static constructor to the class which contains the main method. The code in the static constructor will be

问题 Is it possible to execute any user-provided code before the .NET Main method? It would be acceptable if the code had to be unmanaged. The reason for asking is that this might be a way to solve the problem of calling SetCurrentProcessExplicitAppUserModelID before any UI elements are displayed (as mentioned in Grouping separate processes in the Windows Taskbar) 回答1: In C# you can add a static constructor to the class which contains the main method. The code in the static constructor will be

问题 I have been struggling to download a simple pdf hosted online using restsharp. I have been playing around with the code for over an hour and all I get are null object results. The file downloads easily in POSTMAN using a GET and no content header set but still what gives? Below is the noddy sandbox test I have been experimenting around with: [TestFixture] public class Sandbox { [Test] public void Test() { var uri = "https://www.nlm.nih.gov/mesh/2018/download/2018NewMeShHeadings.pdf"; var

问题 I'm having a problem with foreach(var category in categories) { foreach(var word in words) { var waitCallback = new WaitCallback(state => { DoSomething(word, category); }); ThreadPool.QueueUserWorkItem(waitCallback); } } When the DoSomething gets executed, it receives the latest value for each captured variable instead of the value I desired. I can imagine a solution for this, but it imagine you guys can come up with better solutions 回答1: The canonical way to solve this is to copy the values

问题 When you call the clone() method of an ArrayList, a shallow copy of the list is created. what is shallow copy of array? 回答1: You should distinguish between two kinds of copy: shallow and deep . While deep copy allocates new space for the whole array and all its content (if it contains references, then new space is allocated to create instances with the same values of the ones copied), shallow copy just allocates space with the same size of the copied array. Example: Array A has been allocated

问题 When you call the clone() method of an ArrayList, a shallow copy of the list is created. what is shallow copy of array? 回答1: You should distinguish between two kinds of copy: shallow and deep . While deep copy allocates new space for the whole array and all its content (if it contains references, then new space is allocated to create instances with the same values of the ones copied), shallow copy just allocates space with the same size of the copied array. Example: Array A has been allocated

问题 Reading Josh Smiths article about MVVM his view model CustomerViewModel implements INotifyPropertyChanged but not the underlying Customer class. I can only see one (feasible) way to make change notification work in that case - only make changes to the CustomerViewModel and not the Customer . In that case, should the backend logic of my program also simply work against ViewModels? That seems pretty weird, they being View Models after all. Anyone that can clarify this a bit? Thanks!

问题 Is it possible to have something like this in C#? I am not very sure: class Library { public string Books[string title] { get{return this.GetBookByName(string title);} } public DateTime PublishingDates[string title] { get{return this.GetBookByName(string title).PublishingDate;} } } So it could be used as such: myLibrary.Books["V For Vendetta"] myLibrary.PublishingDates["V For Vendetta"] = ... So my complete member methods that I need to implement in my framework (by calling them) are:

问题 I have the following code: <DataGridTemplateColumn Header="Security"> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <Button Name="Security" Content="{Binding Path=totalSecurities}" Command="{Binding Source={StaticResource viewModel}, Path=filterGridCommand}"> <Button.CommandParameter> <MultiBinding Converter="{StaticResource PassThroughConverter}"> <Binding Path="sector"/> <Binding ElementName="Security" Path="Name"/> </MultiBinding> </Button.CommandParameter> </Button> </DataTemplate>

问题 When I'm drawing a layout on a webpage, using CSS, there can be dozens of rules, scattered across dozens of files, that could possibly influence how an element is actually displayed. Which is why the DOM explorers are such critical tools - I can select an element on a browser and see exactly what CSS rules are being applied to it. In WPF, there can again be many rules - styles and templates and inline attributes and settings injected from the code-behind - that could possibly be interacting