Question

I’m trying to extract form data from within the OnActionExecuting method of an ASP.NET Web API Action Filter so I can write it to a log file.

My code looks like this:

    public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext ctx)
    {
        if (ctx.Request.RequestUri.Query.StartsWith("admin/")) return;

        try
        {
            _loggingService.LogRequest(new RequestLogModel
            {
                Handler = ctx.ControllerContext.ControllerDescriptor.ControllerName,
                Uri = ctx.Request.RequestUri.AbsoluteUri,
                RequestType = ctx.Request.Method.Method,
                RequestFrom = ctx.Request.RequestUri.Host,
                QueryString = ctx.Request.RequestUri.Query,
                FormData = // Need to get form-data here
            });
        }
        catch { }

I can’t seem to work out how to get the form data from the request. Can anyone help?

Answer 1

You should be able to get the form data in the request’s content.

For more information on reading the multipart/form-data content using ReadAsMultipartAsync(…), check out this tutorial, Sending HTML Form Data.