Reading from CosmosDB and write to Azure SQL - sql-server

Question

I have an Azure function to read from Cosmos DB and write to SQL. Since I am new to coding I have a little of struggle to understand how to read the incoming document. I can see that documents are shown at input:
public static async Task Run([CosmosDBTrigger(
databaseName: "ToDoList",
collectionName: "Items",
ConnectionStringSetting = "CosmosDB",
LeaseCollectionName = "leases")]IReadOnlyList<Document> input, ILogger log)
{
if (input != null && input.Count > 0)
{ }
I know that I have to read the document and deserialise it to a C# object which I have this code for (assuming it is correct):
Record resultRecord = JsonConvert.DeserializeObject<Record>(jsonString);
I am lost how to get the data from the json document and write it to the C# object. The connecting part is confusing for me.
I also have a SQL code, and again I dont understand how I should connect my C# object so the data can be read and written to SQL database.
var cnnString = "sqlConnection"; // Connecting to Azure SQL Database
using (var sqlConnection = new SqlConnection(cnnString)) // Start up sql connectin with connectionstring
{
sqlConnection.Open();
var cmd = new SqlCommand
{
//Insert into command (used to insert data into a table)
CommandText = #"insert into [dbo].[Player] ([User] values(#User)",
CommandType = CommandType.Text,
Connection = sqlConnection,
};
var record = new Record();
//set parameters
cmd.Parameters.Add(new System.Data.SqlClient.SqlParameter("#User", record.Email));
await cmd.ExecuteNonQueryAsync();
I am not sure if this is the right way of asking a question about a code, but I appreciate any help.

Answer 1

You want to get data from a json document,we can use the Newtonsoft.Json.dll file to parse the json document.
I think you can change you code like this:
List<Info> jobInfoList = JsonConvert.DeserializeObject<List<Info>>(json);
And here is a sample about how to get data from a json documnet:
class Program
{
static void Main(string[] args)
{
string json = #"[{'id':9527,'username':'admin'}]";
List<Info> jobInfoList = JsonConvert.DeserializeObject<List<Info>>(json);
foreach (Info jobInfo in jobInfoList)
{
Console.WriteLine("UserName:" + jobInfo.username);
}
}
}
public class Info
{
public string id { get; set; }
public string username { get; set; }
}
You can declare variables to receive the data which you want to get from the json String in foreach . Then you can insert these data into your sql database as the parameters.
How to connect to the sql database and write data to sql database,you can see:
Quickstart:
Use .NET (C#) with Visual Studio to connect and query an Azure SQL database
https://learn.microsoft.com/en-us/azure/sql-database/sql-database-connect-query-dotnet-visual-studio#insert-code-to-query-sql-database