Entity Framework Core
A lightweight, extensible, open-source, and cross-platform version of the Entity Framework data access technology.
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How to Extend MainProjectDataContext & use it in RCL project?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 84%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHV%3C/text%3E%3C/svg%3E)
Hamed Vaziri
136
Reputation points
Hi
I have a blazor server project as my main project with a configured dataContext called forexample : MainProjectDataContext.
Now i have a razor class library project which has a reference to my main blazor server project. in my rcl project i've added some classes as poco (without define any dataContext) to handle database transactions.
Now i have a some questions?
- How to extend my MainProjectDataContext in rcl project to handle database transactions for my new classes that i've created in my rcl project?
- how to add my new rcl dataContext to service providers & inject it into my razor files (with some options which i've configured in my main blazor server porject such as connectionString, ...)?
I will be grateful if you show with an example code.
Thanks in advance
Entity Framework Core
ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
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C#
C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
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AgaveJoe 27,696 Reputation points2023-07-10T17:57:15.0733333+00:00 The RCL project does not reference the Blazor Server project. The main project reference the RCL project.
The connection string is always stored in the main project which is the Blazor Server project. The RCL project gets to your data access layer using dependency injection like every ASP.NET Core application.
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Hamed Vaziri 136 Reputation points
2023-07-10T19:52:43.3466667+00:00 Sorry for mistake!
The main project is Blazor project.
Second project is rcl which have a reference from main project.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(73.60000000000001, 90%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EZL%3C/text%3E%3C/svg%3E)
Zhi Lv - MSFT 32,106 Reputation points Microsoft Vendor2023-07-11T02:54:35.27+00:00 Hi @Hamed Vaziri
Razor views, pages, controllers, page models, Razor components, View components, and data models can be built into a Razor class library (RCL). More detail information, see Create reusable UI using the Razor class library project in ASP.NET Core
For the DbContext, as Bruce said, you can create a Shared project (with EF core and DbContext) for it, then add the Shared project reference in the RCL and Main project.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(80, 33%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPS%3C/text%3E%3C/svg%3E)
Piyaphart Samutkang 0 Reputation points2023-07-10T18:19:53.6033333+00:00 -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 61%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
Bruce (SqlWork.com) 61,731 Reputation points2023-07-10T20:18:57.41+00:00 .net does not allow circular references (two projects to ref each other). You should create third project for all shared code.