Upload to PHP server from c sharp client application

Question

Currently i have a c sharp application (Client app). and a web application written php. I want to transfer some files whenever a particular action is performed at client side. Here is the client code to upload the file to php server..

private void button1_Click(object sender, EventArgs e)
{
    System.Net.WebClient Client = new System.Net.WebClient();

    Client.Headers.Add("Content-Type", "binary/octet-stream");

    byte[] result = Client.UploadFile("http://localhost/project1/upload.php", "POST",
                                      @"C:\test\a.jpg");

    string s = System.Text.Encoding.UTF8.GetString(result, 0, result.Length); 
}

Here is the upload.php file to move the file..

$uploads_dir = './files/'; //Directory to save the file that comes from client application.
foreach ($_FILES["pictures"]["error"] as $key => $error) {
  if ($error == UPLOAD_ERR_OK) {
     $tmp_name = $_FILES["pictures"]["tmp_name"][$key];
     $name = $_FILES["pictures"]["name"][$key];
     move_uploaded_file($tmp_name, "$uploads_dir/$name");
 }

I'm not getting any errors from above code. but it does not seem to be working. Why is it? Am i missing something?

Answer 1

Your current PHP code is for handling multiple file uploads, but your C# code is only uploading one file.

You need to modify your PHP code somewhat, removing the foreach loop:

<?php
$uploads_dir = './files'; //Directory to save the file that comes from client application.
if ($_FILES["file"]["error"] == UPLOAD_ERR_OK) {
    $tmp_name = $_FILES["file"]["tmp_name"];
    $name = $_FILES["file"]["name"];
    move_uploaded_file($tmp_name, "$uploads_dir/$name");
}
?>

You also need to ensure that the ./files directory exists.

I have tested the above PHP code with your C# code and it worked perfectly.

• For more information on handling file uploads, refer to the PHP documentation.

• For more information on uploading multiple files with C# and PHP, here are some helpful links:

  Upload files with HTTPWebrequest (multipart/form-data)

  Use Arrays in HTML Form Variables

  PHP: Uploading multiple files

  If you want something simple for uploading multiple files, you just just upload one file at a time to upload.php in a C# loop.

Answer 2

Your php code seems right, however you try to access the file using the "picture" key of the $_FILES global. It does not seems to be specified in your csharp code. I don't know how to do it thought. You could try to see how it was named in your php by doing a print_r or vardump of you $_FILE global or using the array_keys function

Regards

Edit: I found this link that could help you to add a "name" to your uploaded file: http://www.bratched.com/en/home/dotnet/69-uploading-multiple-files-with-c.html