datacontext

问题 There are questions on this already, but they don't answer my question. For example: <ContentControl.Resources> <DataTemplate DataType="{x:Type Databinding:RedScreenViewModel}" > <Databinding:RedScreen DataContext="{Binding}"/> </DataTemplate> <DataTemplate DataType="{x:Type Databinding:BlueScreenViewModel}"> <Databinding:BlueScreen DataContext="{Binding}" /> </DataTemplate> </ContentControl.Resources> As you can see I am attempting to set the DataContext for the created View hoping that it

问题 Restated my Question, old Text Below As I am still hoping for an answer I would like to restate my question. Image I have a GUI with two lists, one that shows a List of all entries to a database tblOrders and another one that shows the items in each order. I can use Linq2sql or EF to get all orders from the database, like so: using (DataClasses1DataContext DataContext = new DataClasses1DataContext()) ListOfOrders = DataContext.tblOrder.ToList(); I can display these order in a list or

问题 I'm using Ninject to retrieve my DataContext from the kernel and I was wondering if Ninject automatically disposes the DataContext, or how he handles the dispose() behaviour. From own experiences I know disposing the datacontext is pretty important and that whenever you create a direct object of the DataContext (as in: new DataContext()) you should use a using() block. My question thus is: When im retrieving my DataContext from the kernel, should I still have to use a using() block? Or does

问题 I'm using Ninject to retrieve my DataContext from the kernel and I was wondering if Ninject automatically disposes the DataContext, or how he handles the dispose() behaviour. From own experiences I know disposing the datacontext is pretty important and that whenever you create a direct object of the DataContext (as in: new DataContext()) you should use a using() block. My question thus is: When im retrieving my DataContext from the kernel, should I still have to use a using() block? Or does

问题 I have a project that interacts with a database through ADO.net Data Services. The database is large ( almost 150 tables with dependencies ). The project started a few years ago and there were DataSets used then; now we're moving towards entity model relationships. The model is growing since we are adding more tables we need to work with. Is this a right way to manage all that?. Meaning should I have a SINGLE database model file to have single data context? What are drawbacks and how do you

问题 I have a simple UserControl called UserControl1 that contains a TextBlock: <UserControl x:Class="WpfApplication2.UserControl1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300"> <Grid> <TextBlock Text="{Binding}"/> </Grid> </UserControl

问题 I am integrating SqlCacheDependency to use in my LinqToSQL datacontext. I am using an extension class for Linq querys found here - http://code.msdn.microsoft.com/linqtosqlcache I have wired up the code and when I open the page I get this exception - "The SQL Server Service Broker for the current database is not enabled, and as a result query notifications are not supported. Please enable the Service Broker for this database if you wish to use notifications." its coming from this event in the

问题 I am trying to display a tooltip for an item generated by an ItemsControl that needs to pull data from conceptually unrelated sources. For example, say I have an Item class as follows: public class Item { public string ItemDescription { get; set; } public string ItemName { get; set; } } I can display the Item within an ItemsControl with a tooltip as follows: <ItemsControl x:Name="itemsControl" ItemsSource="{Binding Items}"> <ItemsControl.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding

问题 I am trying to display a tooltip for an item generated by an ItemsControl that needs to pull data from conceptually unrelated sources. For example, say I have an Item class as follows: public class Item { public string ItemDescription { get; set; } public string ItemName { get; set; } } I can display the Item within an ItemsControl with a tooltip as follows: <ItemsControl x:Name="itemsControl" ItemsSource="{Binding Items}"> <ItemsControl.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding

问题 See the update below for VS2013. When using a class as a d:DesignInstance that exposes a KeyedCollection<TKey, TItem> , the XAML designer complains with the following warning: The number of generic arguments provided doesn't equal the arity of the generic type definition. Parameter name: instantiation The problem can be reproduced with the following simple program: <Window x:Class="Test.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas