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Resolved C# Model Generation Error - SQL Server

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  1. Thomas Rolseth
    Thomas Rolseth
  2. SnapObjects
  3. Monday, 29 July 2019 15:03 PM UTC

I am getting an error when exporting a datawindow using the C# Model Generator to a snapdevelop web api.  When I open the C# Model Generation window I am asked to select/setup a database connection profile which I am able to do.  The test connection option works fine.  At the final stage when I select the project and datawindow folder, I get an error saying that the database connection was not saved correctly.

This was for a SQL Server database.  It worked fine when using Oracle for another snapdevelop api project.  Any thoughts and/or suggestions on how best to resolve this error?  Attached are two images showing the successful test connection and the error.

Thanks, Tom

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  1. C# Model generator
  2. SnapDevelop
  3. SQL Server
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Thomas Rolseth
Thomas Rolseth Accepted Answer Pending Moderation
  1. Friday, 2 August 2019 14:53 PM UTC
  2. SnapObjects
  3. # 1

I created 2 new api's (one basic and one with .NET datastore) from scratch using SnapDevelop and can export a datawindow now to either using the C# Model Generator.  I guess it was an anomaly with the first api I created.  Thanks for all the responses and feedback.

Tom

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Ricardo Jasso
Ricardo Jasso Accepted Answer Pending Moderation
  1. Thursday, 1 August 2019 22:16 PM UTC
  2. SnapObjects
  3. # 2

Does the C# project already exists? Can you try creating a new C# project from scratch inside a user folder like My Documents where you are sure you have read/write permisions, before generating the C# model? If you stil are getting the same error message after trying to generate the C# model can you look at the appsettings.json file to verify that the connection string has not been inserted at all?

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Thomas Rolseth
Thomas Rolseth Accepted Answer Pending Moderation
  1. Tuesday, 30 July 2019 18:19 PM UTC
  2. SnapObjects
  3. # 3

So does this mean there is a bug in PB or SnapDevelop?  Are there any workarounds?  Per a suggestion on this thread, I tried doing this after starting PB as administrator and I moved the api solution out of the inetpub\wwwroot folder to another location on my C drive so that permissions would not be an issue.  However, I am still getting the same error.

Thanks, Tom

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Logan Liu @Appeon
  1. Logan Liu @Appeon
  2. Wednesday, 31 July 2019 05:38 AM UTC
I'm not sure whether there is a bug in PB or SnapDevelop. The easiest way I can imagine to reproduce the issue is to change the appsettings.json file to read-only, but it doesn't seem to be the reason for this case.



Have you ever tried to create a new C# project, then use PB - C# Model Generator to export models to it and see there is any issue?



You can also create a new C# project, then create a DataContext using the same connection, then check whether the connection string is added to the appsettings.json file.



If the error still exists, I suggest that you open a support ticket and upload your PB, C# sample project, and an empty database.



Regards,

Logan
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Thomas Rolseth
Thomas Rolseth Accepted Answer Pending Moderation
  1. Tuesday, 30 July 2019 18:16 PM UTC
  2. SnapObjects
  3. # 4

Thanks for your suggestions.  Tried both but no luck.

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Logan Liu @Appeon
Logan Liu @Appeon Accepted Answer Pending Moderation
  1. Tuesday, 30 July 2019 03:46 AM UTC
  2. SnapObjects
  3. # 5

Hi Thomas,

This error occurs when it fails to save connection string to appsettings.json.

And I have reported this issue to Appeon because I think this error message is not clear enough.

 

Regards,

Logan

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Ricardo Jasso
Ricardo Jasso Accepted Answer Pending Moderation
  1. Monday, 29 July 2019 21:58 PM UTC
  2. SnapObjects
  3. # 6

It could be that SnapDevelop does not have permissions to write to C:\inetpub\wwwroot\EMANAGER_API\...

Try placing the project inside your Documents folder and generating the model again.

Or running PB as an administrator.

Regards,

Ricardo

 

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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Monday, 29 July 2019 20:35 PM UTC
  2. SnapObjects
  3. # 7

Thanks Thomas;

  That version of SS is supported by SnapObjects.

Regards ... Chris

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Thomas Rolseth
Thomas Rolseth Accepted Answer Pending Moderation
  1. Monday, 29 July 2019 18:44 PM UTC
  2. SnapObjects
  3. # 8

Version 14

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Thomas Rolseth
Thomas Rolseth Accepted Answer Pending Moderation
  1. Monday, 29 July 2019 18:31 PM UTC
  2. SnapObjects
  3. # 9

I am using SQL Server Express build 17.9.1 -- see attached.

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Ricardo Jasso
  1. Ricardo Jasso
  2. Monday, 29 July 2019 18:39 PM UTC
That's the version of SQL Server Management Studio, not of the SQL Server engine. You can get the SQL Server engine version by running "select @@version" on a query window.
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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Monday, 29 July 2019 17:41 PM UTC
  2. SnapObjects
  3. # 10

Hi Thomas;

   What version of SS are you trying to use?

Regards ... Chris

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