C
C#13p14

Sending File and Data to a Minimal API endpoint

Hi. I am using .NET 7, Minimal API and Mailkit. What I want to do is to send an attachment along with other information in an email. I want to receive both the information and the file using a Form-Data request type but I am having problems receiving the information . The error I am getting is: 
IFromFormMetadata is only supported for parameters of type IFormFileCollection and IFormFile.
IFromFormMetadata is only supported for parameters of type IFormFileCollection and IFormFile.
. Here is the endpoint code : 
app.MapPost("/sendEmailWithAttachments", async ([FromForm] REmailWithAttachments sendFileRequest) =>
{
    BSendEmail.sendEmailWithAttachments(EmailData: sendFileRequest, sendFileRequest.file.Name, sendFileRequest.file);
    return Results.Ok("Email sent successfully");
})
app.MapPost("/sendEmailWithAttachments", async ([FromForm] REmailWithAttachments sendFileRequest) =>
{
    BSendEmail.sendEmailWithAttachments(EmailData: sendFileRequest, sendFileRequest.file.Name, sendFileRequest.file);
    return Results.Ok("Email sent successfully");
})
And here is the REmailWithAttachments class: 
 public class REmailWithAttachments
    {
        public REmailWithAttachments(string subject, string toName, string toEmail, List<string> ccToEmail, IFormFile file)
        {
Subject = subject;
            ToName = toName;
            ToEmail = toEmail;
            CcToEmails = ccToEmail;
            this.file = file;
        }

        [Required]
        public string Subject { get; init; }
        [Required] public string ToName { get; init; }
        public string ToName { get; init; }
        [Required, EmailAddress]
        public string ParaEmail { get; init; }
        [Required]
        public List<string> CcToEmails { get; init; }
        [Mandatory] public IFormFile file { get; init; }
        public IFormFile file { get; init; }
    }
 public class REmailWithAttachments
    {
        public REmailWithAttachments(string subject, string toName, string toEmail, List<string> ccToEmail, IFormFile file)
        {
Subject = subject;
            ToName = toName;
            ToEmail = toEmail;
            CcToEmails = ccToEmail;
            this.file = file;
        }

        [Required]
        public string Subject { get; init; }
        [Required] public string ToName { get; init; }
        public string ToName { get; init; }
        [Required, EmailAddress]
        public string ParaEmail { get; init; }
        [Required]
        public List<string> CcToEmails { get; init; }
        [Mandatory] public IFormFile file { get; init; }
        public IFormFile file { get; init; }
    }
A
Angius•400d ago
Bit of a stab in the dark, but could it be because of the constructor? Either delete it since it's not needed, or add a default constructor
P
13p14•400d ago
I tried that but still the same problem 😢
P
13p14•400d ago
Oh, it looks like they are still working on it: https://github.com/dotnet/aspnetcore/issues/39430
GitHub
Support Form binding for Minimal endpoints · Issue #39430 · dotnet/...
Support for simple types. ##44653 Suport for complext types. Support for IFormCollection
A
Angius•400d ago
Ah, another reason to not use minimal APIs then
P
13p14•400d ago
Had to learn it the hard way Smadge
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