The problem with the sample above is that it is terribly slow. I have a DataTable with about 400 rows and this conversion takes a good 5 or 6 seconds! It does seem like a pretty common task, so I’m surprised to not see someone here with a more performant solution. * Update!! * Just … Read more
Once again, the act of composing my thoughts for the question reveals the answer. Specifically, the last sentence where I wrote “one row at a time”. I realized I don’t really care that it’s a datareader, as long as I can enumerate it row by row. That lead me to this: public IEnumerable<IDataRecord> GetSomeData(string filter) … Read more
You can’t. The best you can do is render to a hardware accelerated device on an overlay, similar to what video players used to do. Basically, you paint your entire window blue, and render your graphics onto the video card, and internally the video card will replace the blue with the graphics. The downside to … Read more
public class EventThrower { public delegate void EventHandler(object sender, EventArgs args) ; public event EventHandler ThrowEvent = delegate{}; public void SomethingHappened() => ThrowEvent(this, new EventArgs()); } public class EventSubscriber { private EventThrower _Thrower; public EventSubscriber() { _Thrower = new EventThrower(); // using lambda expression..could use method like other answers on here _Thrower.ThrowEvent += (sender, args) … Read more
These are the items that I consider for the topic of Caching: MemCached Win32 Velocity .net Cache Enterprise Library Caching Application Block MemCached Win32: Up until recently I have used MemCached Win32. This is a akin to a web farm (many servers serving the same content for high availability) but it is a cache farm. … Read more
Here is a generic way: public static Stream Serialize(object source) { IFormatter formatter = new BinaryFormatter(); Stream stream = new MemoryStream(); formatter.Serialize(stream, source); return stream; } public static T Deserialize<T>(Stream stream) { IFormatter formatter = new BinaryFormatter(); stream.Position = 0; return (T)formatter.Deserialize(stream); } public static T Clone<T>(object source) { return Deserialize<T>(Serialize(source)); }
How about: public static Predicate<T> Or<T>(params Predicate<T>[] predicates) { return delegate (T item) { foreach (Predicate<T> predicate in predicates) { if (predicate(item)) { return true; } } return false; }; } And for completeness: public static Predicate<T> And<T>(params Predicate<T>[] predicates) { return delegate (T item) { foreach (Predicate<T> predicate in predicates) { if (!predicate(item)) { … Read more
Okay, I couldn’t resist having a go at it. It’ll only work for attributes and elements, but hey… what can you expect in 15 minutes 🙂 Likewise there may very well be a cleaner way of doing it. It is superfluous to include the index on every element (particularly the root one!) but it’s easier … Read more
You can add the following to your exe’s .config file. <?xml version=”1.0″?> <configuration> <system.diagnostics> <trace autoflush=”true”> <listeners> <add name=”logListener” type=”System.Diagnostics.TextWriterTraceListener” initializeData=”cat.log” /> <add name=”consoleListener” type=”System.Diagnostics.ConsoleTraceListener”/> </listeners> </trace> </system.diagnostics> </configuration> I included the TextWriter as well, in case you’re interested in logging to a file.
Posting this answer because the OP requested it: This is how you’d do something like that in WPF: <UserControl x:Class=”WpfApplication7.ListBoxSample” xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation” xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml”> <DockPanel> <Button Content=”Load” Click=”Load_Click” DockPanel.Dock=”Top”/> <ListBox ItemsSource=”{Binding}” HorizontalContentAlignment=”Stretch”> <ListBox.ItemTemplate> <DataTemplate> <Border BorderBrush=”LightGray” BorderThickness=”1″ Padding=”5″ Background=”#FFFAFAFA”> <Grid> <Grid.RowDefinitions> <RowDefinition Height=”Auto”/> <RowDefinition Height=”Auto”/> <RowDefinition Height=”Auto”/> <RowDefinition/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <TextBlock Text=”Dependent … Read more