accesing azure database from azure function - sql-server

Question

I want to access a database from Xamarin and it looks like a good approach is to create a azure database (free for a while)
So I created an account in azure, I created a DBSQLServer, and a SQLDataBase, I set the admin user and password and opened the firewall as part of the process.
I then created a project with azure function in VS 2019, Created a function that just returns an string in the OkObjectResult, and it works (both visiting the local url and the public (after publishing)).
Then I installed the System.Data.SqlClient Nuget package and then tried to connect to the data base usign admin user and password like this :
//did not use "new line"'s in the actual code, included them here for readability.
using (SqlConnection conn =
new SqlConnection("
Server=tcp:javrsserver.database.windows.net,
1433;
Initial Catalog=JaviRS;
Persist Security Info=False;
User ID={javirs};Password={-The one set in the azure portal-};
MultipleActiveResultSets=False;
Encrypt=True;
TrustServerCertificate=False;
Connection Timeout=30;"))
{
try{
conn.Open();
}catch (Exception exc)
{
//here I collect "Login failed for user {javirs}"
//evntID : 18456
}
}
In theory is just wrong password, but im pretty sure the passowrd is Ok. So I guess is more of some windows weird stuff about user account control ...
Any clue ??
PS: If there is a simplier way to get simple sql into my Xamarin app .. I'm also interested. this Azure thing is an over engineering for what I need and is not free forever..
EDIT:
I tried connecting using SQLServver Object Explorer in visual studio, entered the same credentials I entered in the connection string and It does allow me in..

Answer 1

I have done it with following steps:
Azure Sql Script:
CREATE TABLE AzureSqlTable(
[Id] [int] PRIMARY KEY IDENTITY(1,1) NOT NULL,
[FirstName] [nvarchar](max) NULL,
[LastName] [nvarchar](max) NULL,
[Email] [nvarchar](max) NULL,
)
GO
Function Class:
public class AzureFunctionV2SqlTableClass
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Email { get; set; }
public string DbOperationType { get; set; }
}
Azure Function Body:
[FunctionName("FunctionV2SqlConnectionExample")]
public static async Task<IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
//Read Request Body
var content = await new StreamReader(req.Body).ReadToEndAsync();
//Extract Request Body and Parse To Class
AzureFunctionV2SqlTableClass objFuncV2Sql = JsonConvert.DeserializeObject<AzureFunctionV2SqlTableClass>(content);
// variable for global message.
dynamic validationMessage;
// Validate param because, I am checking here.
if (string.IsNullOrEmpty(objFuncV2Sql.FirstName))
{
validationMessage = new OkObjectResult("First Name is required!");
return (IActionResult)validationMessage;
}
if (string.IsNullOrEmpty(objFuncV2Sql.LastName))
{
validationMessage = new OkObjectResult("Last Name is required!");
return (IActionResult)validationMessage;
}
if (string.IsNullOrEmpty(objFuncV2Sql.Email))
{
validationMessage = new OkObjectResult("Email is required!");
return (IActionResult)validationMessage;
}
//Read database Connection
var sqlConnection = "Data Source =tcp:sqlserverInstancenNameFromAzurePortal.database.windows.net,1433;Initial Catalog=YouDbName;Persist Security Info=False;User ID=ServerUserName;Password=ServerPass;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;";
//Sql Execution Message varible
dynamic sqlExecutionMessage;
//Define Db operation Type
if (objFuncV2Sql.DbOperationType.ToUpper() == "INSERT")
{
using (SqlConnection conn = new SqlConnection(sqlConnection))
{
conn.Open();
var text = "INSERT INTO AzureSqlTable VALUES ('" + objFuncV2Sql.FirstName + "', '" + objFuncV2Sql.LastName + "', '" + objFuncV2Sql.Email + "') ";
using (SqlCommand cmd = new SqlCommand(text, conn))
{
sqlExecutionMessage = await cmd.ExecuteNonQueryAsync();
}
conn.Close();
}
validationMessage = new OkObjectResult(sqlExecutionMessage + " ROW INSERTED");
return (IActionResult)validationMessage;
}
//As we have to return IAction Type So converting to IAction Class Using OkObjectResult We Even Can Use OkResult
var result = new OkObjectResult("Operation Falid! No Relevant Command Found!");
return result;
}
Reference Required:
using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System.Net.Http;
using System.Data.SqlClient;
Nuget Paackage I used:
System.Data.SqlClient(4.6.1)
Download from Nuget package manager. See the screen shot below:
Post Man Sample:
{
"FirstName": "Kiron New Sql FunctionV2",
"LastName":"Kiron New Local Sql",
"Email":"KironTest#microsoft.com",
"DbOperationType":"INSERT"
}
Point To Remember:
Follow what I exactly tried to demonstrate here, no engineering
before make it run
Just update the connection string with your Azure Sql Server
Credentials
Get rid of {} from password as I did not specified it in my example
also, While you copy connection string from portal in contain
{password} just omit {}
If your function encountered error from Azure Portal SQL Db
regarding your Client IP address. In that case just add your Client
IP like below:
Step:1
Step:2
Note: I have just tried to show Insert operation. Hope it will work accordingly.

Answer 2

The error says: "Login failed for user {javirs}"
This hints that you included the {} in your user name (and provably in your password. Removing the { and the } will do the trick.
It works now.