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DataContext

DataContext

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EntityFrameworkCore Seeding Component

by Adriaan Booysen

Adding Seeding Framework towards EntityFrameworkCore that can be wired up in either a dotnet core Web Application or WebAPI

EF Core ApplyConfigurations Implementation

by saadishahin

A quick psedu-code for EF Core that's equivalent to modelBuilder.Configurations.AddFromAssembly in entity framework

CRUD Operations using LINQ Entities

by Shivprasad koirala

CRUD operations using LINQ Entities

Simplest MVVM Tutorial -A Quick Refresher to WPF MVVM

by @nkit Bajpai

This article discuss a simple application built using WPF MVVM design pattern and explain the basics of Command Binding and DataBinding.

Latest Articles

EF Core ApplyConfigurations Implementation

by saadishahin

A quick psedu-code for EF Core that's equivalent to modelBuilder.Configurations.AddFromAssembly in entity framework

Entity Framework, Hybrid Approach

by Sherjil_Ahmed

Mixing DB-First and Code First Approach for using SPs in EF-Way

EntityFrameworkCore Seeding Component

by Adriaan Booysen

Adding Seeding Framework towards EntityFrameworkCore that can be wired up in either a dotnet core Web Application or WebAPI

Simplest MVVM Tutorial -A Quick Refresher to WPF MVVM

by @nkit Bajpai

This article discuss a simple application built using WPF MVVM design pattern and explain the basics of Command Binding and DataBinding.

All Articles

DataContext

Intercepting Database Query Commands

15 Feb 2012 by Ed Nutting

Hi all,I have a Microsoft SQL Server database and I am using LINQ to SQL to interact with it in my ASP.Net C# 4.0 Website. What I would like to do is have a method that before a query is submitted to the database, grabs the command that will be sent and allows me to look at it. Basically, I...

Intercepting Database Query Commands

15 Feb 2012 by Ed Nutting

Thanks greatly to amitgajjar for this solution.This solution use the in-built DataContext.Log property. Since in my situation I am running this as a website and so multiple DataContexts may exist, I used a static method to create all my DataContexts and assign to their Log property the...

How Can i use Same UserControl for Diffrenet TabControls with same parameters in UserControls but be able to save every parameters in each tab in different items

2 Oct 2013 by Jegan Thiyagesan

you create a tabViewModel, in the tab view model you create the collection of user control. so each control in the collection will have its own instance and be bind to each tab. This way you will maintain the separation.App.xaml ( set the App.xaml to fire the start up event)

Configure Entity Data Source Shows an Error Entity Framework 6.1.3

27 Sep 2016 by .Net Jim

Entity Framework 6 no longer supports wizard items. You are expected to use NuGet instead, then work entirely manually. Bottom line...used entity framework without the data source. Do in page load or other page event and bind to collection coming back or load collection into Datatable or...

EntityFrameworkCore Seeding Component

9 May 2017 by Adriaan Booysen

Adding Seeding Framework towards EntityFrameworkCore that can be wired up in either a dotnet core Web Application or WebAPI

entity-framework

How Can i use Same UserControl for Diffrenet TabControls with same parameters in UserControls but be able to save every parameters in each tab in different items

1 Oct 2013 by behnamse

Hi, I have 1 UserControl and im using it in several Tabs, all these tabs have same parameters but i want all parameters in different tabs save data in different places. now all parameters in tabs just can save in 1 place that i have wrote in my ViewModel on the user control. Could you please...

Unable to generate the model because of the following exception: (There is insufficient system memory in resource pool 'default' to run this query.)

7 Nov 2014 by mrslyldrm

When i try to update my datacontext,i'm getting this output;Unable to generate the model because of the following exception: 'System.Data.Entity.Core.EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details. --->...

SQL-Server-2008R2

Unable to generate the model because of the following exception: (There is insufficient system memory in resource pool 'default' to run this query.)

7 Nov 2014 by ZurdoDev

This is not a code question but a technical issue. If you google the exact error you'll see lots of possible solutions for fixing this problem.I'd start with analyzing your query to see how you can improve it's performance.Go through the google search results and you'll see other ways...

SQL-Server-2008R2

Not able to get Data Context For Parent Item in WPF

22 Nov 2015 by Member 10842586

Hi, I am trying to add a Context Menu and bind a command to that in my tree as shown in code below. I get it, Since I am adding the Context Menu in ListBox then I will get the DataContext of List box.So here my question is How can I get the DataContext of ItemsControl while creating the...

Convert this longest sql query in linq using C#?

14 Jan 2016 by Maciej Los

The easiest way is to use specific tool, such as Linqer, LinqPad, etc. See: SQL to LINQ Tool - Stack Overflow[^]On the other side, you should do - at least - minimum effort to find solution by studying 101 LINQ Samples in C#[^]

Can someone please explain what the below R line of code does ?

23 Sep 2016 by Member 12757084

test[,(factcols) := lapply(.SD, factor), .SDcols = factcols]factcols has a list columns for which the above needs to be applied. I am trying to understand what does .SD and .SDcols mean in the above code.Thanks in advance!!What I have tried:I am trying to understand what does .SD...

How correctly move this code from code behind to MVVM?

13 Jun 2018 by Gerry Schmitz

Quote: this.DataContext = cs; into this this.DataContext = new ViewModel(); but it`s doesn't work. The statements you posted are not "equivalent". Assuming the first statement even worked, your "ChartSurface" is now a "member" of the ViewModel (class); versus before when it was "at the top"....

Datacontext becomes null when I use containercontentchanging

30 Jun 2021 by Philosopheur

I have a GridView which display an image in a Grid. This App is based on PhotoLab Sample. ImageGridView_ContainerContentChanging is called when GridWiew is populated. When it's done, I would like to use RightTapped on the grid (which contains an...

Why does my property from my viewmodel get reset everytime I change the page?

2 Aug 2022 by EstKells

I have this Property: private string _TextBox1 = "Input"; public string TextBox1 { get { return _TextBox1; } set { _TextBox1 = value; ...

Why does my property from my viewmodel get reset everytime I change the page?

2 Aug 2022 by Gerry Schmitz

https://stackoverflow.com/questions/49767595/how-to-navigate-to-previous-page-in-wpf-but-keep-the-data[^]

EF Core ApplyConfigurations Implementation

3 Jun 2018 by saadishahin

A quick psedu-code for EF Core that's equivalent to modelBuilder.Configurations.AddFromAssembly in entity framework

CRUD Operations using LINQ Entities

11 Jul 2009 by Shivprasad koirala

CRUD operations using LINQ Entities

Configure Entity Data Source Shows an Error Entity Framework 6.1.3

16 Oct 2020 by sreeyush sudhakaran

Hi, When I tried configuring the EntityDataSource of my ASP .NET 4.5 WebForms Project and Selected named connection , It Popups an Error message as below"The metadata specified in the connection string could not be loaded.Consider rebuilding the web project to built assemblies that...

Simplest MVVM Tutorial -A Quick Refresher to WPF MVVM

13 Apr 2016 by @nkit Bajpai

This article discuss a simple application built using WPF MVVM design pattern and explain the basics of Command Binding and DataBinding.

Entity Framework, Hybrid Approach

1 Jun 2017 by Sherjil_Ahmed

Mixing DB-First and Code First Approach for using SPs in EF-Way

entity-framework

WPF 4.0 MVVM Binding the UserControl DataContext from the MainWindow viewmodel

21 Sep 2012 by Bob Brady

In order to enable drag-drop properly between two user controls, I need to call their viewmodels from the MainWindow viewmodelI had thought that it would be as simple as this:

Configure Entity Data Source Shows an Error Entity Framework 6.1.3

16 Oct 2020 by Member 14967439

1. go where you project is located(open Solution explorer. right click on solution and click on "Open Folder in file explorer" 2. open EDMX file with notepad and change ProviderManifestToken="2012" to ProviderManifestToken="2008". save it 3. ...

Convert this longest sql query in linq using C#?

14 Jan 2016 by Cristo1985

Is there someone help me convert it into LINQ? SELECT DISTINCT TBCAR1.MAKE_ID, TBCAR1.Species, TBCAR1.ModelName, TBCAR1.ModelNum, TBCAR1.Body, TBCAR1.ModelFrom, TBCAR1.ModelTo, TBCAR1.Doors,TBCAR1.VersionName, TBCAR1.CodeList, TBCAR1.BodyName, TBCAR1.ModelYear, TBCAR1.Fuel, TBCAR1.Kw,...

How correctly move this code from code behind to MVVM?

13 Jun 2018 by Member 13251895

how correctly move this code from code behind to mvvm? namespace DemoApp { /// /// Interaction logic for MainWindow.xaml /// public partial class MainWindow : Window { ChartSurface.ChartSurface cs; double[] data; public...