Convert files and merge using ConvertAPI

Question

I am trying to convert my doc and png files to PDF and merge them using ConvertAPI, Whenever I try to run the code snippet provided on their site it just doesn't return any file result.

The online stats on my page shows it has been converted

This is the code I am using

var convertApi = new ConvertApi("<my secret key>");
convertApi.ConvertAsync(fileFormatFrom, "pdf",
    new ConvertApiFileParam(FileToConvert)
).Result.SaveFiles(MyOutputFolder);

I was able to get the conversion then done using WebClient's UploadFile function, but I am not sure how to achieve Merge using the same.

Any help will be appreciated.

its a C# web application, for some reason the sample that they have provided (console application) seems to work fine, but it won't work on my web application — Karthik Ganesan, Jun 19 '19 at 20:06

score 1 · Accepted Answer · answered Jun 20 '19 at 13:46

The problem lies in Asynchronous handling in ASP.NET Web Forms. I am posting a working solution on how to handle async methods in ASP.NET Web Forms.

First, make your Web Form asynchronous by putting Async=true like this

<%@ Page Language="C#" CodeBehind="Default.aspx.cs" Inherits="Default" Async="true" %>

Next, you need to register the async method using RegisterAsyncTask and only after that execute the async method itself.

    protected void Page_Load(object sender, EventArgs e)
    {
        RegisterAsyncTask(new PageAsyncTask(ConvertAsync));
    }

    public async Task ConvertAsync()
    {
        var convertApi = new ConvertApi("<secret>");
        var convertApiResponse = await convertApi.ConvertAsync("docx", "pdf", new ConvertApiFileParam(@"C:\TestFiles\test3.docx"));
        convertApiResponse.SaveFiles(@"C:\TestFiles");
    }

Convert files and merge using ConvertAPI

1 Answers1