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* added dapper orm content

* Update docs/content/preview/develop/build-apps/csharp/ysql-dapper.md

Co-authored-by: Dwight Hodge <79169168+ddhodge@users.noreply.github.com>

* Update docs/content/preview/develop/build-apps/csharp/ysql-dapper.md

Co-authored-by: Dwight Hodge <79169168+ddhodge@users.noreply.github.com>

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269 changes: 269 additions & 0 deletions docs/content/preview/develop/build-apps/csharp/ysql-dapper.md
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---
title: Build a C# application that uses Dapper ORM and YSQL
headerTitle: Build a C# application
linkTitle: More examples
description: Build a C# application that uses Dapper ORM and the YSQL API.
menu:
preview:
identifier: build-apps-csharp-2-ysql
parent: cloud-csharp
weight: 556
type: docs
---

<ul class="nav nav-tabs-alt nav-tabs-yb">
<li>
<a href="../ysql-entity-framework/" class="nav-link">
<i class="icon-postgres" aria-hidden="true"></i>
Entity Framework ORM
</a>
</li>
<li>
<a href="../ysql-dapper/" class="nav-link active">
<i class="icon-postgres" aria-hidden="true"></i>
Dapper ORM
</a>
</li>
</ul>

The following tutorial implements a REST API server using the [Dapper](https://github.com/DapperLib/Dapper) ORM. The scenario is that of an e-commerce application where database access is managed using the ORM. It includes the following tables:

- `users` — the users of the e-commerce site
- `products` — the products being sold
- `orders` — the orders placed by the users
- `orderline` — each line item of an order

The source for the above application can be found in the [Using ORMs with YugabyteDB](https://github.com/yugabyte/orm-examples/tree/master/csharp/dapper) repository.

## Prerequisites

This tutorial assumes that you have:

- YugabyteDB up and running. Download and install YugabyteDB by following the steps in [Quick start](../../../../quick-start/).
- [.NET SDK 6.0](https://dotnet.microsoft.com/en-us/download) or later.

## Clone the "orm-examples" repository

```sh
$ git clone https://github.com/YugabyteDB-Samples/orm-examples.git && cd orm-examples/csharp/dapper/DapperORM
```

## Database configuration

To modify the database connection settings, change the `DefaultConnection` field in `appsettings.json` file which is in the following format:

`Host=$hostName; Port=$dbPort; Username=$dbUser; Password=$dbPassword; Database=$database`

| Properties | Description | Default |
| :--------- | :---------- | :------ |
| Host | Database server IP address or DNS name. | 127.0.0.1 |
| Port | Database port where it accepts client connections. | 5433 |
| Username | The username to connect to the database. | yugabyte |
| Password | The password to connect to the database. | |
| Database | Database instance in database server. | yugabyte |

## Start the REST API server

To change default port for the REST API Server, go to `Properties/launchSettings.json` and change the `applicationUrl` field under the `DapperORM` field.

- Build the REST API server.

```sh
$ dotnet build
```

- Run the REST API server

```sh
$ dotnet run
```

The REST server runs at `http://localhost:8080` by default.

## Send requests to the application

Create 2 users.

```sh
$ curl --data '{ "firstName" : "John", "lastName" : "Smith", "email" : "jsmith@example.com" }' \
-v -X POST -H 'Content-Type:application/json' http://localhost:8080/users
```

```sh
$ curl --data '{ "firstName" : "Tom", "lastName" : "Stewart", "email" : "tstewart@example.com" }' \
-v -X POST -H 'Content-Type:application/json' http://localhost:8080/users
```

Create 2 products.

```sh
$ curl \
--data '{ "productName": "Notebook", "description": "200 page notebook", "price": 7.50 }' \
-v -X POST -H 'Content-Type:application/json' http://localhost:8080/products
```

```sh
$ curl \
--data '{ "productName": "Pencil", "description": "Mechanical pencil", "price": 2.50 }' \
-v -X POST -H 'Content-Type:application/json' http://localhost:8080/products
```

Verify the `userId` and `productId` from the database using the following YSQL commands from your [ysqlsh](../../../../admin/ysqlsh/#starting-ysqlsh) shell.

```sql
yugabyte=# SELECT * FROM users;
```

```output
user_id | first_name | last_name | user_email
---------+------------+-----------+----------------------
1 | John | Smith | jsmith@example.com
101 | Tom | Stewart | tstewart@example.com
(2 rows)
```

```sql
yugabyte=# SELECT * FROM products;
```

```output
product_id | description | price | product_name
------------+-------------------+-------+--------------
1 | 200 page notebook | 7.50 | Notebook
101 | Mechanical pencil | 2.50 | Pencil
(2 rows)
```

Create 2 orders with products using the `userId` for John.

```sh
$ curl \
--data '{ "userId": "1", "products": [ { "productId": 1, "units": 2 } ] }' \
-v -X POST -H 'Content-Type:application/json' http://localhost:8080/orders
```

```sh
$ curl \
--data '{ "userId": "1", "products": [ { "productId": 1, "units": 2 }, { "productId": 101, "units": 4 } ] }' \
-v -X POST -H 'Content-Type:application/json' http://localhost:8080/orders
```

## Query results

### Use the YSQL shell

```sql
yugabyte=# SELECT count(*) FROM users;
```

```output
count
-------
2
(1 row)
```

```sql
yugabyte=# SELECT count(*) FROM products;
```

```output
count
-------
2
(1 row)
```

```sql
yugabyte=# SELECT count(*) FROM orders;
```

```output
count
-------
2
(1 row)
```

### Use the REST API

To use the REST API server to verify that the users, products, and orders were created in the `yugabyte` database, enter the following commands. The results are output in JSON format.

```sh
$ curl http://localhost:8080/users
```

```output.json
{
"content": [
{
"userId": 101,
"firstName": "Tom",
"lastName": "Stewart",
"email": "tstewart@example.com"
},
{
"userId": 1,
"firstName": "John",
"lastName": "Smith",
"email": "jsmith@example.com"
}
],
...
}
```

```sh
$ curl http://localhost:8080/products
```

```output.json
{
"content": [
{
"productId": 101,
"productName": "Pencil",
"description": "Mechanical pencil",
"price": 2.5
},
{
"productId": 1,
"productName": "Notebook",
"description": "200 page notebook",
"price": 7.5
}
],
...
}
```

```sh
$ curl http://localhost:8080/orders
```

```output.json
{
"content": [
{
"orderId":"2692e1e9-0bbd-40e8-bf51-4fbcc4e9fea2",
"orderTime":"2022-02-24T02:32:52.60555",
"orderTotal":15.00,
"userId":1,
"users":null,
"products":null
},
{
"orderId":"f7343f22-7dfc-4a18-b4d3-9fcd17161518",
"orderTime":"2022-02-24T02:33:06.832663",
"orderTotal":25.00,
"userId":1,
"users":null,
"products":null
}
]
}
```

## Explore the source

The application source is available in the [orm-examples](https://github.com/yugabyte/orm-examples/tree/master/csharp/dapper) repository.
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ linkTitle: More examples
description: Build a C# application that uses Entity Framework and the YSQL API.
menu:
preview:
identifier: build-apps-csharp-3-ysql
identifier: build-apps-csharp-1-ysql
parent: cloud-csharp
weight: 556
type: docs
Expand All @@ -18,6 +18,12 @@ type: docs
Entity Framework ORM
</a>
</li>
<li>
<a href="../ysql-dapper/" class="nav-link">
<i class="icon-postgres" aria-hidden="true"></i>
Dapper ORM
</a>
</li>
</ul>

The following tutorial implements a REST API server using the [Entity Framework](https://docs.microsoft.com/en-us/ef/) ORM. The scenario is that of an e-commerce application where database access is managed using the [Entity Framework Core](https://docs.microsoft.com/en-us/ef/core/). It includes the following tables:
Expand Down Expand Up @@ -45,7 +51,7 @@ $ git clone https://github.com/YugabyteDB-Samples/orm-examples.git && cd orm-exa

## Database configuration

- To modify the database connection settings, change the default `ConnectionStrings` in `appsettings.json` file which is in the following format:
To modify the database connection settings, change the default `ConnectionStrings` in `appsettings.json` file which is in the following format:

`Host=$hostName; Port=$dbPort; Username=$dbUser; Password=$dbPassword; Database=$database`

Expand Down Expand Up @@ -113,8 +119,8 @@ yugabyte=# \c ysql_entityframework
You are now connected to database "ysql_entityframework" as user "yugabyte".
```

```sh
ysql_entityframework=# SELECT count(*) FROM users;
```sql
ysql_entityframework=# SELECT * FROM users;
```

```output
Expand All @@ -125,8 +131,8 @@ ysql_entityframework=# SELECT count(*) FROM users;
(2 rows)
```

```sh
ysql_entityframework=# SELECT count(*) FROM products;
```sql
ysql_entityframework=# SELECT * FROM products;
```

```output
Expand Down

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