Issue in creating a file and writing content into it in azure function - azure

Question

I am writing an azure function for creating and uploading text on azure storage but I got error 500 Internal server error. Below is my code of the azure function.
#r "Newtonsoft.Json"
#r "Microsoft.WindowsAzure.Storage"
using System.Net;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using Microsoft.WindowsAzure.Storage.Auth;
using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.File;
using System;
public static async Task<IActionResult> Run(HttpRequest req, ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string strFileName = "321rahila.csv";//req.Query["name"];
string Content ="Hello File";
//string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
// dynamic data = JsonConvert.DeserializeObject(requestBody);
// strFileName = strFileName ?? data?.strFileName;
string StorageAccountName = "xyz";
string StorageKey = "i0PNZ6Ykse7oSSfUzFeA36rQfAv9UZnJ5wybQWh5Jol0NRM4sal4s8B3ipkjvfzcsP8/gnI6A==";`enter code here`
string strShareName = "lables";
//string StorageScheme = "SharedKey";
// string FileEndPoint = string.Format("https://{0}.file.core.windows.net/", StorageAccountName);
CloudStorageAccount storageAccount = new CloudStorageAccount(new StorageCredentials(StorageAccountName, StorageKey), true);
var fileClient = storageAccount.CreateCloudFileClient();
var share = fileClient.GetShareReference(strShareName);
// if (share.Exists())
{
var rootDir = share.GetRootDirectoryReference();
CloudFile file = rootDir.GetFileReference(strFileName);
var fileToCreate = rootDir.GetFileReference(strFileName);
**fileToCreate.UploadText(Content);**
}
return strFileName != null
? (ActionResult)new OkObjectResult($"Hello, {strFileName}")
: new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}
I get the error when I uncomment the line fileToCreate.UploadText(Content); and without it I am unable to create a file and upload text into it. The same is working fine on visual studio.

Answer 1

The problem is the Azure Function in the portal could not find the Microsoft.WindowsAzure.Storage package. The right way is to create project.json file and reference NuGet package explicitly. The below is my project.json file.
{
"frameworks": {
"net46":{
"dependencies": {
"Microsoft.WindowsAzure.Storage": "9.3.3"
}
}
}
}
Then in the run.csx use the assembly.
#r "Microsoft.WindowsAzure.Storage"
And the below is my work code.
#r "Newtonsoft.Json"
#r "Microsoft.WindowsAzure.Storage"
using System.Net;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.File;
using Microsoft.WindowsAzure.Storage.Auth;
public static async Task<IActionResult> Run(HttpRequest req, ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string name = req.Query["name"];
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
name = name ?? data?.name;
string strFileName = "321rahila.csv";//req.Query["name"];
string Content ="Hello File";
string StorageAccountName = "my account";
string StorageKey = "my key";
string strShareName = "windows";
//string StorageScheme = "SharedKey";
// string FileEndPoint = string.Format("https://{0}.file.core.windows.net/", StorageAccountName);
CloudStorageAccount storageAccount = new CloudStorageAccount(new StorageCredentials(StorageAccountName, StorageKey), true);
var fileClient = storageAccount.CreateCloudFileClient();
var share = fileClient.GetShareReference(strShareName);
// if (share.Exists())
{
var rootDir = share.GetRootDirectoryReference();
CloudFile file = rootDir.GetFileReference(strFileName);
var fileToCreate = rootDir.GetFileReference(strFileName);
await fileToCreate.UploadTextAsync(Content);
}
return name != null
? (ActionResult)new OkObjectResult($"Hello, {name}")
: new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}
Hope this could help you.