I really like this blog! Excellent! I'm not hearing any audio with the three screen casts...

Never mind.  My mistake. Audio was not included.

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Thanks Elephant.

I finish all the steps without any error. But stuck in the silverlight lodding page

Why not write all the steps out. I think the video without audio was more complicated than words.

Hi Colin,
Thanks for your very nice videos,  I was able to build up my application with your videos.  I tried it with my own database every thing is perfict.
I have a small concern with CRUD Operations.

I have taken a DomainServices Class for my Customers Table and linked the results into grid using Domain Data source in SL.

1) Getting Data is working Perfectly. but i am unable to perform insert, Update, Delete on the table. for these Operations i am using DataForm control.
2) I want to restructure my results display in the Grid so i was trying to add the Alias to the Column Names in the IQueryable method but i am getting Error.

here is my code for IQueryable Method:


public IQueryable<TM_Customer_Master> GetCustomers()
        {
            IQueryable<TM_Customer_Master> objCust=null;
          
                objCust = (IQueryable<TM_Customer_Master >)from cust in this.ObjectContext.TM_Customer_Master
                          where cust.TM_CompanyName.Contains(strCompName) && cust.TM_ContactPerson.Contains(strContactName)
                          orderby cust.TM_CompanyName
                          select new
                          {
                             Company= cust.TM_CompanyName,
                             ContactPerson= cust.TM_ContactPerson,
                             ContactNo= cust.TM_ContactNumber,
                             Address=cust.TM_Address,
                             EmailID= cust.TM_EmailID,
                             WebSite=cust.TM_Website
                          };
            

            return objCust;
        }

Can you please suggest me the solution.

Excellent! where can i download the video??

Hello Colin,

I am very impressed with the quality of the videos. Only if there was audio accompanying those! Still, as I said they are high quality -- not just the graphics but the information too is great. I am trying to learn how I can implement the info in my work. Will return. Keep doing the good work.

Chris

Hi Colin.  

I tried to follow your project, and use the same methodology in my app.  I didnt see these vids at first, and so when I attempted looking at just your code, the building process seemed relatively straight forward.  I got the app to build but when attempting to run, I got an error saying webcontext was not loaded.

Looking at the vids, there is a bit where you open the project files to edit.  I am on VS2010 beta, and there is no option to edit the project file.  What should I do?

Thanks

@Shaggy
First off, first person to ask about the Edit Project File. I am actually using the VS Power Commands and I am not sure if those will even exist for VS2010. In the meantime, you can just go to the project file thorugh the file system and open it with Notepad.

For the error you are getting, sounds like you didn't put the code in your App.Xaml.(vb/cs) file to startup the WebContext.

@shaggy
we have power commands for 2010 with that you will get edit project context menu in solution explorer
with the help of colins vids I have created a walkthrough which explains the entire process of creating N-tier app in sl4 and much more I will publish the link tomoro here if Colin permits
@Colin can I publish the link for the walk through in your blog

Thanks Colin and Bhaskar.  Colin, I did what you said, and I think it is working.  It seems that my VS2010 templates are corupted as usually I would automatically get all the code ofr the login scirpts on the project, but now they are all missing.  Using your project as a reference, I am manually creating all the UI etc for the login.  

Updating the Web part of my main project to reference the authentication project and updating the webconfig seems to have stopped the errors appearing.  The UI logic is still a bit shakey as the links don't appear for the login etc.  Am looking into it.

What I want to know is now that I have a separate project which is concerned only with authentication, once I have authorised a user and the details are in the client as a webcontext, can I get access to the webcontext from a different project on the server.  My scenario is I have a data project whose sole purpose is to get data from a database.  Originally it was part of the main web project, where authentication was also located so had access to the webcontext, now each project has been separated.  I don't want to send the entire recordset down to the client and filter for the user in the model, so I require access to the webcontext when data is being retreived and so data is pre-filtered before the model/view model gets it.  Is this wise, and how can this be done?

Thanks

First off, go ahead and post any URLs that you want as long as they are programming related.
The WebContext uses WebContextBase so as long as your projects reference the RIA libraries you should be able to access the WebContext from WebContextBase.Current. If you need any deeper access then that then you will need to reference the AppServices library from whatever project you are using. Personally, I consider AppServices to be just that, services needed from the entire application, so I reference it from any projects that need it without worrying about it too much.

Thanks Colin,

Here is the link for my Blog for walk-through of Creating Rich Business Applications.

wunnavabk.blogspot.com

Hi Colin,

following your setup, can I have a separate data project alongside the appservices or does it have to be situated inside appservices to work?  The reason I ask is that I followed your guide and created an n-tier app.  I have used the appservices project to handle authentication only, and have a separate project which contains a domain service which gives access to the rest of the data.  Both these services are accessing the same database, but I dont think this is of any concern.

Anyhow the problems arises with validation.  I am using MVVM setup with MEF to bind it all together.  The data is pulled through fine (well sort off - I am still getting problems when I leave the app for some time and then click a record - it seems to forget everything and gives an error that it cannot connect to the data service), but when it comes to adding record, I have linked in the validation, but it is never pulled through - instead I get errors on the viewmodel.  The webcontext is set to the auth service within the view, but I am using the data service as the context on the V/VM.  Could this be causing problems with the validation not being pulled through??

I am pulling my hair out trying to get my app to work and am not sure how to get the view to pick up the validation cues..

Any ideas?  Thanks.

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