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Posts Tagged ‘CodeFluent Entities’

CodeFluent Entities and Fetch Performance Benchmark


Two month ago, we heard about a benchmark that fetch performance of .NET Data Access Tools and ORMs. This benchmark has been introduced by Frans Bouma in this following blog post.

We started by creating a simple implementation with CodeFluent Entities and then analyze the result. Thanks to the flexibility of our product, it seems natural for us to provide an optimized but generic implementation. This means that the code is still generated.

CodeFluent Entities provides dynamics modeling features like “Aspects” to implement application-wide behaviors. This is what we call dynamic modeling. In a nutshell, in CodeFluent Entities, dynamic modeling is materialized as aspects and it allows developers to inject extra-behaviors in models.

That’s what gave us the idea of developing a new Aspect called “FasterReader” to reduce the number of data type conversion.
We explained our approach in a blog Post named “Fetch performance of CodeFluent Entities compared to others“.
This Aspect is generic (not “benchmark dedicated”) and can be used in any kind of model.

Once the article is published, we sent a Pull Request on the RawDataAccessBencher GitHub repository to submit the CodeFluent Entities implementation:

pullrequest

The initial commit is available here and includes the CodeFluent Entities Model with the SoftFluent.FasterReader.xml aspect.

We also modified the README.MD file with the following changes:

CodeFluent Entities is a Model-First code generator. CodeFluent Entities will access database using automatically generated stored procedures. For more information about CodeFluent Entities and this benchmark: http://blog.codefluententities.com/2014/03/27/fetch-performance-of-codefluent-entities/.

Of course, this readme includes a link to our blog post that explains the approach.

Then, Frans Bouma asked us to make some understandable changes before merging the code:

  • remove links to CodeFluent Entities website
  • remove a large file with all the procs
  • remove useless files in various folders regarding TFS, scc, resx, .user, etc.
  • remove the CodeFluent Entities Model

For your information about the last statement: we have chosen to add this project to let users generate again the code and to be completely transparent.

Of course, feedbacks has been considered a few days later:

pull_request_changes

At the end of April, the CodeFluent Entities implementation was finally merged:
merge

But… the 5th of May, Frans Bouma removed our code:

CFE_Removal

With the following reason:

The CodeFluent code was removed as it kept the connection open during
individual fetches which therefore turned out to be faster than everyone
else. This was hard to find, and therefore a form of cheating.

By default, CodeFluent Entities opens one connection per thread but we attempted to explain that we can change this behavior. His reaction was the following:

Wont_Merge

You will find below the result with the custom configuration:

ADO.NET’s Connection Pooling keeps all connections open so that doesn’t change a lot of things so we don’t change this setting:

Results

We understand the way out products connects to a database out-of-the-box is not ok for Mr Bouma, but we don’t really understand why he went so mad about this, treating us cheaters. Again, this is how it works out-the-box. Why should we investigate why our product – based on stored procedures – is faster than others? Mr Bouma could have discussed with us – like he did in the beginning of the whole process – and we could have changed this default behavior happily to comply with his rules. We were not trying to make a fool of him or to hide crucial information from him, just compete with other products. It’s a sad way of doing thing, and in the end, this behavior does not change anything to the numbers.

Moreover, if you want to check or test our implementation (the Model is included), please visit the following GitHub repository.

The R&D Team.

ASP.NET Identity v2 and CodeFluent Entities

April 30, 2014 Leave a comment

Update (2014/06/23) – please check out this related post :

A few weeks ago, we wrote about ASP.NET Identity v1 and CodeFluent Entities. The ASP.NET Identity system is designed to replace the previous ASP.NET Membership and Simple Membership systems. It includes profile support, OAuth integration, works with OWIN and is included with the ASP.NET templates shipped with Visual Studio 2013.

ASP.NET Identity 2.0 was released last month so today we’ll see how to use it with CodeFluent Entities.

What’s new?

One of the drawbacks of the first release was that the primary key must be of type “string”. This new version allows to use any type as primary key. To do so, interfaces now have a second generic parameter, “TKey”, to specify the type of the primary key (int, Guid, etc.).
They also introduce new interfaces:

  • IUserLockoutStore<User, TKey>: allow to lock-out an account after a determined failed connection attempts
  • IUserEmailStore<User, TKey>: allow to store an email address and to confirm it (by sending an email for example)
  • IUserPhoneNumberStore<User, TKey>: allow to store a phone number and to confirm it (by sending a SMS for example)
  • IUserTwoFactorStore<User, TKey>: enable two-factor authentification (for example login/password and a token sent by email or SMS)

The implementation

 

Here’s the CodeFluent Entities Model to support those interfaces:

model

You’ll note that our model contains:

  • Implementation rules. We don’t even have to add partial class, everything is in the model
  • validation rules (EmailValidation) to ensure email address is valid
  • Unique contraints (UserName, Email, Role Name)

As for ASP.NET Identity v1, each method is only one or two lines of code:

public class UserStore :
    IUserStore<User, Guid>,
    IUserPasswordStore<User, Guid>,
    IUserSecurityStampStore<User, Guid>,
    IUserRoleStore<User, Guid>,
    IUserLoginStore<User, Guid>,
    IUserClaimStore<User, Guid>
{
    public Task<User> FindAsync(UserLoginInfo login)
    {
        return Task.FromResult(User.LoadByProviderKey(login.ProviderKey));
    }

    public Task ResetAccessFailedCountAsync(User user)
    {
        user.AccessFailedCount = 0;
        return Task.FromResult(0);
    }

    public Task<int> GetAccessFailedCountAsync(User user)
    {
        return Task.FromResult(user.AccessFailedCount);
    }

    // and so on
}

The full implementation is available on our GitHub repository.

The R&D team.

Views, Auto-Lightweight and the Modeler

April 22, 2014 Leave a comment

In a previous post we saw how to create views and lightweight entities by using XML. Nowadays most of you are using the graphical modeler, so let’s see how to create views.

First, let’s create a simple model:

model

We can create a view that contains the supplier name and the country name. Select the supplier entity and click the “Add view” button from the ribbon:

ribbon - add view

You should see the following window:

Add view 1

Enter a valid name and select properties to include in the view. Only properties from the selected entity are shown. So to add the country name, we have to click the “Add” button and enter the binding expression “Country.Name” (auto completion prevents mistakes).

Add view 2

The « Auto infer lightweight entity » checkbox allows to generate an entity that contains selected properties. As the name suggests it’s a light entity: it’s not persistent, it has no CRUD methods (e.g. load, save, delete) nor extra properties by default, and it does not implement any interfaces other than the ICodeFluentLightEntity by default.

Now we can create a method that will load data from this view:

load from view

The generated code contains the SQL view :

CREATE VIEW [dbo].[vSupplierSupplierLight]
AS
SELECT [Supplier].[Supplier_Name], [Country].[Country_Name] AS 'CountryName'
FROM [Supplier]
INNER JOIN [Country]
ON ([Supplier].[Supplier_Country_Id] = [Country].[Country_Id])

And the inferred lightweight entity:

BOM

 

Happy View-ing!

The R&D team

Fetch performance of CodeFluent Entities compared to others

March 27, 2014 Leave a comment

CodeFluent Entities has a great way to extend or modify generated code. This can be done through Custom Producers, Sub-Producers or Aspects. In fact, it can happen that you will meet very special requirements during your project, the kind of requirements that will involve some customizations to all of your code. Of course you don’t want to do this job manually by modifying each property or method in your project. Instead you can change the generated code to fit your expectations by using aspect. For a first introduction to aspect development in CodeFluent Entities please visit our blog.

In our situation, after reading Frans Bouma’s blog on benchmark of several ORMs of the .Net platform (Entity Framework, NHibernate, LLBLGen Pro, Linq To Sql and more), we wanted to integrate CodeFluent Entities to the benchmarks he made.

Integrating CodeFluent Entities to the benchmark project

First we downloaded the project from its GitHub repository.

After opening the RawBencher solution we created a CodeFluent Entities Model project:

CodeFluent Entities Project

Also we created a class library project to hold the code generated by CodeFluent Entities:

Class Library Project

Then we added one Business Object Model Producer and one SQL Server Producer to this project:

Solution Explorer

Here is the configuration for each producer:

Business Object Model

Business Object Model

Microsoft SQL Server

Microsoft SQL Server

Then we imported the AdventureWorks database to our CodeFluent Entities model:

Import

Then select the Microsoft SQL Server importer:

SQL Server Importer

Finally, set the connection string as pictured below:

SQL Server importer configuration

Once the import from database was done we built the model project to generate C# code and database stored procedures. After this, for the final step we added a bencher class to call CodeFluent Entities generated code. We basically reproduced the same schema as the existing ones for other ORMs already set up in this benchmarking project.

We are now ready to start the benchmarking!

Running the benchmark and analyzing results

We ran the project in release mode and we got the following results:

Non-change tracking fetches, set fetches (10 runs), no caching:

  1. Handcoded materializer using DbDataReader: 214,63ms
  2. PetaPoco Fast v4.0.3: 285,50ms
  3. Dapper: 306,25ms
  4. Linq to SQL v4: 318,50ms
  5. PetaPoco v4.0.3: 355,00ms
  6. Entity Framework v6: 362,13ms
  7. CodeFluent Entities 551,00ms
  8. ServiceStack OrmList v4.0.9.0: 555,75ms
  9. LLBLGen Pro v4.1.0.0, typed view: 585,00ms
  10. Oak.DynamicDb using dynamic Dto class: 902,50ms

Non-change tracking individual fetches (100 elements, 10 runs), no caching:

  1. CodeFluent Entities: 0,18ms
  2. DataTable, using DbDataAdapter: 0,37ms
  3. Oak.DynamicDb using dynamic Dto class: 0,40ms
  4. LLBLGen Pro v4.1.0.0: 0,44ms
  5. Telerik DataAccess/OpenAccess Fluent v4.0.3: 0,50ms
  6. Telerik DataAccess/OpenAccess Domain v4.0.3: 0,50ms
  7. NHibernate v3.3.1.4000: 0,68ms
  8. Entity Framework v6: 1,85ms
  9. Linq to Sql v4: 2,89ms

We focused only on non-change Tracking mode because it is the one that matches CodeFluent Entities features.

We can see that CodeFluent Entities is ranked at the first place for single fetch operations. Also we can see that it is ranked 7th for the multiple fetch operations.

Of course each ORM offers different features and because of that some of them can have a more naïve approach than others which will check data type conversion for instance or check cache during the fetch. This will lead to a speed difference in execution time.

For example if you compare a SQL hand coded query against any ORM among the ones available in .NET, hand coded query will be for sure faster. In our case we can explain why CodeFluent Entities generated code is taking more time in the multiple set fetch operation. Basically the code generated is doing some additional operations that we can get rid of in this particular scenario:

For instance in this LoadAll method we do not need to check if an element is already contained in the inner list so we should remove the check:

LoadAll

Another example is the ReadReacord method, in this case we do not need to test if the reader is null or not, neither the options and since the type are secure and primitive types we do not need to use the CodeFluent Persistence GetReader methods a simple reader.GetIn32 or reader.GetDate can be used depending on the type:

ReadRecord

After making these changes we can run the benchmark again to see what changed!

Running the benchmark with the adapted code

Here are the new result after code adaptation:

Non-change tracking fetches, set fetches (10 runs), no caching:

  1. Handcoded materializer using DbDataReader: 214,63ms
  2. CodeFluent Entities 273,25ms
  3. PetaPoco Fast v4.0.3: 285,50ms
  4. Dapper: 306,25ms
  5. Linq to SQL v4: 318,50ms
  6. PetaPoco v4.0.3: 355,00ms
  7. Entity Framework v6: 362,13ms
  8. ServiceStack OrmList v4.0.9.0: 555,75ms
  9. LLBLGen Pro v4.1.0.0, typed view: 585,00ms
  10. Oak.DynamicDb using dynamic Dto class: 902,50ms

After these changes CodeFluent Entities is now ranked at the 2nd place just after the hand coded query!

I will now show you how to make these custom changes more generic to apply them to the entire project for instance.

Understanding CodeFluent Entities Aspects

In CodeFluent Entities, the code generation process is model-first and continuous: from your declarative model, a meta-model will be inferred which code generators will then translate into code.

AspectAspects introduce a new notion allowing you to plug into this process. Using aspects you’ll be able to work on this in-memory representation of the model, before anything is produced and dynamically add/remove/modify elements in your model: this is what we call dynamic modeling. In a nutshell, in CodeFluent Entities, dynamic modeling is materialized as aspects and it allows developers to inject extra-behaviors in models.

You can easily see what the inferred model contains by selecting the option “View Inferred Model” on your project:

View Inferred Model

Then you can get details about any method or property of your code, for instance in our case the LoadAll method of the SalesOrderHeader entity:

Inferred Model

This inferred model will be used by the Business Object Model Producer we configured before to generate our code.

When you build your project, the enabled producers are instantiated to work on your model. With CodeFluent Entities you can interact at moment of the code production. For example you can change on the fly the behavior of your CodeDom producer (aka Business Object Model Producer) by accessing its instance:

CodeDomProducer codeDomProducer = Project.Producers.GetProducerInstance<CodeDomProducer>();

codeDomProducer.CodeDomProduction += (sender, e) =>
{
    //write your code here ...
}

And then you can manipulate this codeDomProducer object to change the body of your methods or do any other change to the generated code. In our case this will be very helpful to change the body of the LoadAll and ReadRecord methods.

Making code adaptation using aspects

In fact the changes we made can be reproduced automatically among the code by using a custom aspect that will interact with the Business Object Model Producer on the fly.

You can download the FastReader.xml file that contains the aspect we developed to make our customizations generic.

To remind you here is what the LoadAll method looked like before using the aspect:

LoadAll Before

Here is the new version of the same function:

LoadAll After

Another example is the ReadRecord method; here is what it was like before using the aspect:

Read Record Before

After enabling the aspect the method is replaced by a new one with the name FastReadRecord:

Read Record After

CodeFluent Entities offers many ways to customize the code generation and aspects is only one way among the others. In fact code customization can also be done by using sub-producers or patch-producers. Each technic has its pros and cons and in our case aspects was the best way to reach our goal. If you want to read more about sub-producers or patch producers please visit our blog here and here.

I hope this article helped you to figure out the flexibility of CodeFluent Entities.

Feel free to download and use the FastReader.xml aspect if you need.
Moreover, the full source code is available on our GitHub Profile.

Happy Adapting!

The R&D team.

Define your own CodeFluent Entities Keyboard shortcuts

March 24, 2014 1 comment

Some of you ask us if we can create your own keyboard shortcuts with CodeFluent Entities. Yes, of course. You can assign a shortcut to add an entity or a property into your CodeFluent Entities surface thanks to Visual Studio Keyboard Commands. While we do not set default keyboard shortcuts, you can define your own:

  • Open the Visual Studio Options dialog (Tools / Options / Environment / Keyboard)
  • Select the desired command (search command containing CodeFluent)
  • Define the keyboard shortcut

shortcut

Below is a list of the most common CodeFluent commands:

  • Add Entity: OtherContextMenus.CodeFluentSurface.Add.Entity
  • Add Property: OtherContextMenus.CodeFluentSurface.Add.Property
  • Add Rule: OtherContextMenus.CodeFluentSurface.Add.Rule
  • Add Instance: OtherContextMenus.CodeFluentSurface.Add.Instance
  • Model Search: OtherContextMenus.CodeFluentSurface.ModelSearch (my favorite!)
  • Arrange Surface: OtherContextMenus.CodeFluentSurface.Arrange.Surface

Happy shortcutting, The R&D Team

Multi-database deployment with PowerShell and the Pivot Script Runner – Part 2

March 6, 2014 Leave a comment

In Part 1 of this article, we looked at using the PowerShell strengths to automate the process of updating several databases through the PivotRunner tool.

Now, we want to go further and create a PowerShell command, better known as a Cmdlet.

Build the Cmdlet

A Cmdlet can be built directly in a Powershell script, or through the .NET Framework. We need to inherit from System.Management.Automation.Cmdlet and define its naming attributes therefor.

By agreement, the name of a Cmdlet consists of a verb, followed by a dash and a name (e.g: Get-ChildItem andAdd-PSSnapIn):

using System.Management.Automation;

namespace CodeFluentEntitiesCmdlet
{
    [Cmdlet(VerbsData.Update, "CFEDatabase", SupportsShouldProcess = true, 
            ConfirmImpact = ConfirmImpact.High)]
    public class UpdateCFEDatabase : Cmdlet
    {
    }
}

Here, the Cmdlet’s name will be Update-CFEDatabase.

Use the following PowerShell command: Copy ([PSObject].Assembly.Location) C:\MyDllPath to find the System.Management.Automation library

SupportsShouldProcess and ConfirmImpact attributes allow the Cmdlet to use the PowerShell Requesting Confirmation feature.

The Cmdlet abstract class includes a fairly advanced command parameters engine to define and manage parameters:

[Parameter(Mandatory = true)]
public string ConnectionString { get; set; }

[Parameter(Mandatory = true)]
public string PivotFilePath { get; set; }

The Mandatory term is used to warn the command parameters engine of whether or not a parameter is required.

Cmdlet also exposes some methods which can be overriden. These pipeline methods allow the cmdlet to perform pre-processing operations, input processing operations, and post-processing operations.

Here, we’ll just override the ProcessRecord method:

protected override void ProcessRecord()
{
  // Process logic code
}

Then, we need to use the PivotRunner which is located in the CodeFluent.Runtime.Database assembly.

The tool takes the connection string and the pivot script producer output file as parameters:

using CodeFluent.Runtime;
using CodeFluent.Runtime.Database.Management.SqlServer;

private void UpdateDatabase()
{
    try
    {
        PivotRunner runner = new PivotRunner(PivotFilePath);

        runner.ConnectionString = ConnectionString;

        if (!runner.Database.Exists)
        {
            WriteObject("Error: The ConnectionString parameter does not lead to an existing database!");
            return;
        }
        runner.Run();
    }
    catch (Exception e)
    {
        WriteObject("An exception has been thrown during the update process: " + e.Message);
    }
}

Do not forget to reference CodeFluent.Runtime.dll and CodeFluent.Runtime.Database.dll!

Moreover, we can recover the PivotRunner output (internal logs) by providing an IServiceHost implementation:

public class CmdletLogger : IServiceHost
{
    private Cmdlet _cmdLet;

    public CmdletLogger(Cmdlet cmdlet)
    { 
        _cmdLet = cmdlet;
    }

    public void Log(object value)
    {
        _cmdLet.WriteObject(value);
    }
}

runner.Logger = new CmdletLogger(this);
runner.Run();

Powershell integration

The Cmdlet is now finished! :)

Now we’ll see how to call it from Powershell! Here, we have several options, but we shall see the PSSnapIn one.

The “Writing a Windows PowerShell Snap-in” article shows that a PSSnapIn is mostly a descriptive object which inherits from System.Configuration.Install.Installer and is used to register all the cmdlets and providers in an assembly.

So, let’s implement our Powershell snap-in:

using System.ComponentModel;
using System.Management.Automation;

namespace CodeFluentEntitiesCmdlet
{
    [RunInstaller(true)]
    public class CodeFluentEntitiesCmdletSnapin01 : PSSnapIn
    {
        public CodeFluentEntitiesCmdletSnapin01()
            : base() { }

        public override string Name
        {
            get { return ((object)this).GetType().Name; }
        }

        public override string Vendor
        {
            get { return "SoftFluent"; }
        }

        public override string VendorResource
        {
            get { return string.Format("{0},{1}", Name, Vendor); }
        }

        public override string Description
        {
            get { return "This is a PowerShell snap-in that includes the Update-CFEDatabase cmdlet."; }
        }

        public override string DescriptionResource
        {
            get { return string.Format("{0},{1}", Name, Description); }
        }
    }
}

Then, we build our solution which contains our Cmdlet and the PSSnapIn and finally register the built library thinks to the InstallUtil.exe (located in the installation folder of the .NET Framework):

Administrator rights are required.

Administrator rights are required.

By using the “Get-PSSnapIn –Registered” Powershell command, we can observe that our PSSnapIn is well registered. This component can now be used into your Powershell environment:

Get-PSSnapIn–Registered

The “Add-PSSnapIn” command enables us to use our Cmdlet into the current session of Powershell.

As result, we can update our previously built Powershell script:

param([string[]]$Hosts, [string]$PivotFilePath, [switch]$Confirm = $true)

Add-PSSnapin CodeFluentEntitiesCmdletSnapin01

if ($Hosts -eq $null -or [string]::IsNullOrWhiteSpace($PivotFilePath))
{
    Write-Error "Syntax: .\UpdateDatabase.ps1 -Hosts Host1[, Host2, ...] -PivotFilePath PivotFilePath"
    break
}

[System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.SMO') | out-null

Write-Host "-========- Script started -========-"

$Hosts | foreach {
    $srv = new-object ('Microsoft.SqlServer.Management.Smo.Server') $_

    $online_databases = $srv.Databases | where { $_.Status -eq 1 -and $_.Name.StartsWith("PivotTest_") }
    
    if ($online_databases.Count -eq 0)
    {
        Write-Error "No database found"
        break
    }

    Write-Host "Database list:"
    $online_databases | foreach { Write-Host $_.Name }

    [string]$baseConnectionString = "$($srv.ConnectionContext.ConnectionString);database="
    $online_databases | foreach {
        Update-CFDatabase -ConnectionString "$($baseConnectionString)$($_.Name)" -PivotFilePath $PivotFilePath -Confirm:$Confirm
    }
}

Write-Host "-========-  Script ended  -========-"

We can now simply deploy all changes we’ve recently made on our databases thanks to the Cmdlet and PivotRunner components.

The source code is available for download.

Happy PowerShelling !

The R&D team

Using Microsoft Office as a Front-end

March 4, 2014 1 comment

Using CodeFluent Entities you can generate synchronizable lists which lets you use Microsoft Office Excel (2003 and above) and Microsoft Office Access (2007 and above) as front-end clients of your application. This feature was actually already discussed in this post: Introduction to SharePoint Lists, but we’ll digg a bit further today :).

As a reminder the global architecture is illustrated in the following figure:

Office lists

Before creating the solution, let’s see what the user interface will look like:

Excel

Let’s create the solution

We’ll create 4 projects:

  • A CodeFluent Entities Model project
  • A Class Library project to store the Business Object Model
  • A Database project for the data
  • An empty WebForm project to host the web site and some special web services

Projects

We can add some entities to the model:

Model

Note : there should be only one key (not a composite one) of type Int (or aliases like integer, int32, etc.), with identity (automatic numbering) for the entity to support two-ways synchronization with Office apps, so don’t use Guid or anything else.

Now, let’s also add two computed properties: FullName and Age, and let’s configure the following producers:

  • The SQL Server Producer
  • The Business Object Model (C#) Producer
  • The Office Producer: “Physical Root Path” and “Target directory” must be set to the web project

Now we can build the model. After that, the last thing to do for the synchronization magic to happen is to add a special component that emulates a SharePoint website to our ASP.NET generated web site. We used to provide an ISAPI filter for this, but starting with II7, we now provide a .NET HttpModule class that does the job. So you just need to add the following piece of configuration in the web.config file for this to work:

<system.webServer>
	<modules runAllManagedModulesForAllRequests="true">
		<add name="WssEmulator" type="CodeFluent.Runtime.Web.WssEmulator" />
	</modules>
	<validation validateIntegratedModeConfiguration="false" />
</system.webServer>

Working with Microsoft Access

Open Access and create a new blank database. Select SharePoint List from the External Data tab:

Access

Enter the root URL of your CodeFluent Entities generated “Office” website. Access will then show a list of available lists. Now, choose the list(s) you want to link to.

Access SharePoint

Now you can open and edit your data directly from Access:

Access Sync

Or maybe you would prefer to fill data in an automatically generated form?

Access Forms

Now let’s to do the same thing with Microsoft Excel! :)

Working with Microsoft Excel

To open a list in Excel you need an .IQY file. This “internet query” file format us used by Microsoft Excel to run queries over HTTP(S). CodeFluent Entities generates a web page that contains all available lists and allows Excel to download the associated .IQY file. Launch the web project and navigate to http://localhost/en-us/lists.aspx:
Lists Web

Note that you can also generate .IQY files by using the template located in the “C:\Program Files (x86)\SoftFluent\CodeFluent\Modeler\Templates\OfficeServiceHost\ClientIqy” directory, created by the CodeFluent Entities installation.

Select one of them to open your list in Microsoft Excel:

Excel Sync

If you are using Excel 2007 or above you want to read this article: Restoring Two-Way Synchronization on SharePoint Lists Using Excel.

Points of interest

  • Enumerations and relations are selectable through a drop-down list (relations show the property defined as the display property of the related entity)
  • By default, relations (drop-down lists in Excel) load all values from the related entity. You can change that by setting the loadMethodName attribute cfpo:loadMethodName=”LoadMethodCustom”
  • Supports data validation. Excel or Access ensures that values are valid for a given type. For example you can’t write a string into an integer defined column.
  • Supports CodeFluent Entities blob-type columns. They will be displayed as hyperlink in Excel. Click on one of them to download the related file/blob.
  • Supports rich text as HTML. For example if you set a cell value to test (bold), the column cell will contain <strong>Test</strong>
  • Supports Read-only columns (by setting the property Is Read Only to true in the model)
  • Supports HTTP and HTTPS
  • Supports authentication (NTLM, Kerberos, basic authentication with an extra CodeFluent Entities provided module)
  • Supports offline work. Excel can save the data even if the network is unavailable.
  • Create different views of the same Entity, for example one for editing data and another one for viewing data. In the first one you can set FirstName, LastName and Date of birth. In the second one, you may prefer showing the full name and the age (you could use computed properties in this case).
  • Add parameters to your lists
LOAD(string name) 
WHERE FirstName STARTSWITH @name OR LastName STARTSWITH @name

An Excel standard dialog box will prompt you for defined parameters when you open the list from Excel. This is a nice way to filter the list. Note in this mode the list is not updatable, just read-only.

Parameter Value

CodeFluent Entities provides out-of-the box a user friendly way to view and edit data.
Don’t forget that in Microsoft Office Excel 2007, 2010 & 2013, the ability to update the data in SharePoint lists directly from Excel is somehow deprecated. Nevertheless, you should look at SharePoint List Synchronizer to address this issue and restore this two-way sync functionality.

Happy synchronizing!

The R&D team.

The sample source code is available for download.

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