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web forms and c#

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Say there is a web form on some site, with let's say fields "Name" and "Last Name" and when you click a button, say "Submit", your name and last names are sent to a database. What I want to do is write a C# application that will fill in those fields for me automatically with the names that I want and simulate pushing the "Submit" button... how would I do that? Thank you!

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You can use the aptly-named WebRequest class to make web requests.

The following demo code POSTs fields to rot13.com. The fields are stored in a Dictionary; the CreateQueryString method might be useful. [smile]

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Web;

namespace PostWebRequestDemo {
class Program {
static void Main(string[] args) {

// Here are the fields to submit.
var Fields = new Dictionary<string, string>();
Fields.Add("text", "P funec naq .ARG ner pbby, ab?" + Environment.NewLine + "Abgr ubj guvf vf pbeerpgyl HEY-rapbqrq.");
Fields.Add("other", "There is no other field, but let's pretend!");

// Create a WebRequest instance to perform the query.
var Request = WebRequest.Create("http://www.rot13.com/");
Request.Method = "POST";
Request.ContentType = "application/x-www-form-urlencoded";

// Turn fields into a query string.
var RequestParams = CreateQueryString(Fields);
Request.ContentLength = RequestParams.Length;

// Write our request.
using (var RequestStreamWriter = new StreamWriter(Request.GetRequestStream(), Encoding.Default)) {

// Execute/Read the response.
string Response = "";
using (var ResponseReader = new StreamReader(Request.GetResponse().GetResponseStream())) {
Response = ResponseReader.ReadToEnd();


private static string CreateQueryString(IEnumerable<KeyValuePair<string, string>> fields) {
var EncodedFields = new List<string>();
foreach (var Field in fields) {
EncodedFields.Add(HttpUtility.UrlEncode(Field.Key) + "=" + HttpUtility.UrlEncode(Field.Value));
return string.Join("&", EncodedFields.ToArray());


You will need to add a reference to System.Web to use the HttpUtility class.

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