Visual Studio Code – BlobTrigger Func VSCode. Could not load type 'Microsoft.Azure.WebJobs.ParameterBindingData' from assembly 'Microsoft.Azure.WebJobs, Version=3.0.34.0

I was getting the same error when I tried with the configuration with versions [3.0.0, 4.0.0) and [4.*, 5.0.0):

• So, I had to use the below configuration in host.json to fix the above issue:

{
  "version": "2.0",
  "logging": {
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": true,
        "excludedTypes": "Request"
      },
      "enableLiveMetricsFilters": true
    },
    "extensionBundle": {
      "id": "Microsoft.Azure.Functions.ExtensionBundle",
      "version": "[3.*, 3.9.0)"
    }
  }
}

• I have followed MSDOC to implement Blob Trigger Output binding with below code:

Code Snippet:

[FunctionName("Function1")]
[StorageAccount("con")]
public static void Run([BlobTrigger("sample-images/{name}")] Stream image,
    [Blob("sample-images-sm/{name}", FileAccess.Write)] Stream imageSmall,
    [Blob("sample-images-md/{name}", FileAccess.Write)] Stream imageMedium)
{
        IImageFormat format;

    using (Image<Rgba32> input = Image.Load<Rgba32>(image, out format))
    {
        ResizeImage(input, imageSmall, ImageSize.Small, format);
    }

    image.Position = 0;
    using (Image<Rgba32> input = Image.Load<Rgba32>(image, out format))
    {
        ResizeImage(input, imageMedium, ImageSize.Medium, format);
    }
}

public static void ResizeImage(Image<Rgba32> input, Stream output, ImageSize size, IImageFormat format)
{
    var dimensions = imageDimensionsTable[size];

    input.Mutate(x => x.Resize(dimensions.Item1, dimensions.Item2));
    input.Save(output, format);
}

public enum ImageSize { ExtraSmall, Small, Medium }

private static Dictionary<ImageSize, (int, int)> imageDimensionsTable = new Dictionary<ImageSize, (int, int)>() {
    { ImageSize.ExtraSmall, (320, 200) },
    { ImageSize.Small,      (640, 400) },
    { ImageSize.Medium,     (800, 600) }
};

Uploading Image to Container:

Output:

• Resized, created a blob automatically and uploaded the Resized Images(as per code):

Updating answer as per the comments:

[2023-10-30T13:42:50.935Z] Microsoft.Azure.WebJobs.Host: Error indexing method ‘BlobTriggerCSharp’. Microsoft.Azure.WebJobs.Host: Can’t bind Blob to type ‘Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob’.
[2023-10-30T13:42:50.938Z] Possible causes:

I was also getting the same error:

• As per my research, got to know that CloudBlockBlob class is only supported with Microsoft.Azure.Storage.Blob(deprecated package).
• Instead, we need to use BlobClient or BlobCloudClient class to achieve the same which is part of Azure.Storage.Blobs package(latest).

I have reproduced the same using your code with few modifications as shown below:

Code Snippet:

[FunctionName("BlobTrigger")]
public static async Task Run([BlobTrigger("samples-workitems/{name}", Connection = "conn")] Stream myBlob, string name, [Blob("output-blob/{name}", FileAccess.ReadWrite, Connection = "AzureWebJobsStorage")] BlockBlobClient outputBlob, ILogger log)
{
    log.LogInformation($"C# Blob trigger function Processed blobn Name:{name} n Size: {myBlob.Length} Bytes");
    var width = 100;
    var height = 200;
    var encoder = new PngEncoder();
    using (var output = new MemoryStream())
    using (Image<Rgba32> image = (Image<Rgba32>)Image.Load(myBlob))
    {
        image.Mutate(x => x.Resize(width, height));
        image.Save(output, encoder);
        output.Position = 0;
        await outputBlob.UploadAsync(output);

    }   
}