VB.NET

Add Parameters to Multipart Form-Data POSTs

Parameters (name=value) can be added to multipart/form-data POSTs (such as for file uploads) by using the AddParam method. This example sends the following HTTP POST

POST /something HTTP/1.1
Content-Type: multipart/form-data; boundary=------------010201080703010401070605
Host: domain
Content-Length: 560

--------------010201080703010401070605
Content-Disposition: form-data; name="name"

Joe
--------------010201080703010401070605
Content-Disposition: form-data; name="age"

25
--------------010201080703010401070605
Content-Disposition: form-data; name="fileA"; filename="fileA.txt"
Content-Type: text/plain

This is the contents of file A
--------------010201080703010401070605
Content-Disposition: form-data; name="fileB"; filename="fileB.txt"
Content-Type: text/plain

This is the contents of file B
--------------010201080703010401070605--

VB.NET

Dim req As New Chilkat.HttpRequest

req.HttpVerb = "POST"
req.Path = "/something"
req.ContentType = "multipart/form-data"

req.AddParam("name","Joe")
req.AddParam("age","25")

req.AddStringForUpload("fileA","fileA.txt","This is the contents of file A","utf-8")
req.AddStringForUpload("fileB","fileB.txt","This is the contents of file B","utf-8")

Debug.WriteLine(req.GenerateRequestText())