我需要一种方法来自动填写并提交表单。它必须从URL开始，因为我需要从我的domoticz中调用它。我尝试使用AJAX提交并注入javascript，但我得到了同源策略。我尝试提交的表单不是我的，所以我无法对此进行更改。
我试过了：
JQUERY
setTimeout(function(){
$("#frame").attr("src", ":javascript:alert('test');");
}, 3000);
C＃
frame.Src = "https://URL";
int milliseconds = 10000;
Thread.Sleep(milliseconds);
frame.Src = "javascript:alert('test');";
C＃2
`
WebRequest req = WebRequest.Create("URL");
string postData = "field1=11111&field2=22222&field3=33333";
byte[] send = Encoding.Default.GetBytes(postData);
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = send.Length;
Stream sout = req.GetRequestStream();
sout.Write(send, 0, send.Length);
sout.Flush();`
为什么我要用这个？通过表格，您可以在车上办理一小时。一小时后你必须再次检查。我整天忘记了一整天。
答案 0 :(得分：1)
我建议你使用以下课程：
public static class WebRequester
{
/// <summary>
/// Sending POST request.
/// </summary>
/// <param name="url">Request Url.</param>
/// <param name="data">Data for request.</param>
/// <param name="userName">user name for log in</param>
/// <param name="password">password for log in</param>
/// <returns>Response body.</returns>
public static string HttpPost(string url, string data, string userName = "", string password = "", int timeout = 100000)
{
string Out = String.Empty;
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
try
{
req.ContentType = "application/json";
req.Method = "POST";
req.ProtocolVersion = HttpVersion.Version11;
req.Accept = "*/*";
AddAuthentication(userName, password, req);
req.Timeout = timeout;
//req.ContentType = "application/x-www-form-urlencoded";
byte[] sentData = Encoding.UTF8.GetBytes(data);
req.ContentLength = sentData.Length;
using (System.IO.Stream sendStream = req.GetRequestStream())
{
sendStream.Write(sentData, 0, sentData.Length);
sendStream.Flush();
sendStream.Close();
}
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
System.IO.Stream ReceiveStream = res.GetResponseStream();
using (System.IO.StreamReader sr = new System.IO.StreamReader(ReceiveStream, Encoding.UTF8))
{
Char[] read = new Char[256];
int count = sr.Read(read, 0, 256);
while (count > 0)
{
String str = new String(read, 0, count);
Out += str;
count = sr.Read(read, 0, 256);
}
}
}
catch (ArgumentException ex)
{
Out = string.Format("HTTP_ERROR :: The second HttpWebRequest object has raised an Argument Exception as 'Connection' Property is set to 'Close' :: {0}", ex.Message);
}
catch (WebException ex)
{
Out = string.Format("HTTP_ERROR :: WebException raised! :: {0}", ex.Message);
}
catch (Exception ex)
{
Out = string.Format("HTTP_ERROR :: Exception raised! :: {0}", ex.Message);
}
return Out;
}
/// <summary>
/// Sending GET request.
/// </summary>
/// <param name="url">Request Url.</param>
/// <param name="data">Data for request.</param>
/// <param name="userName">user name for log in</param>
/// <param name="password">password for log in</param>
/// <returns>Response body.</returns>
public static string HttpGet(string url, string data, string userName, string password)
{
string Out = String.Empty;
Uri uri = new Uri(url);
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url + (string.IsNullOrEmpty(data) ? "" : "?" + data));
req.ContentType = "application/json";
req.Method = "GET";
AddAuthentication(userName, password, req);
try
{
System.Net.WebResponse resp = req.GetResponse();
using (System.IO.Stream stream = resp.GetResponseStream())
{
using (System.IO.StreamReader sr = new System.IO.StreamReader(stream))
{
Out = sr.ReadToEnd();
sr.Close();
}
}
}
catch (ArgumentException ex)
{
Out = string.Format("HTTP_ERROR :: The second HttpWebRequest object has raised an Argument Exception as 'Connection' Property is set to 'Close' :: {0}", ex.Message);
}
catch (WebException ex)
{
Out = string.Format("HTTP_ERROR :: WebException raised! :: {0}", ex.Message);
}
catch (Exception ex)
{
Out = string.Format("HTTP_ERROR :: Exception raised! :: {0}", ex.Message);
}
return Out;
}
private static void AddAuthentication(string userName, string password, HttpWebRequest req)
{
if (userName != null && password != null)
{
string base64Credentials = GetEncodedCredentials(userName, password);
req.Headers.Add("Authorization", "Basic " + base64Credentials);
}
}
/// <summary>
/// Sending Delete request.
/// </summary>
/// <param name="url">Request Url.</param>
/// <param name="data">Data for delete.</param>
/// <param name="userName">user name for log in</param>
/// <param name="password">password for log in</param>
/// <returns>Response body.</returns>
public static string HttpDelete(string url, string data, string userName, string password)
{
string Out = String.Empty;
Uri uri = new Uri(url);
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url + (string.IsNullOrEmpty(data) ? "" : "?" + data));
req.ContentType = "application/json";
req.Method = "DELETE";
AddAuthentication(userName, password, req);
try
{
System.Net.WebResponse resp = req.GetResponse();
using (System.IO.Stream stream = resp.GetResponseStream())
{
using (System.IO.StreamReader sr = new System.IO.StreamReader(stream))
{
Out = sr.ReadToEnd();
sr.Close();
}
}
}
catch (ArgumentException ex)
{
Out = string.Format("HTTP_ERROR :: The second HttpWebRequest object has raised an Argument Exception as 'Connection' Property is set to 'Close' :: {0}", ex.Message);
}
catch (WebException ex)
{
Out = string.Format("HTTP_ERROR :: WebException raised! :: {0}", ex.Message);
}
catch (Exception ex)
{
Out = string.Format("HTTP_ERROR :: Exception raised! :: {0}", ex.Message);
}
return Out;
}
private static string GetEncodedCredentials(string userName, string password)
{
string mergedCredentials = string.Format("{0}:{1}", userName, password);
byte[] byteCredentials = UTF8Encoding.UTF8.GetBytes(mergedCredentials);
return Convert.ToBase64String(byteCredentials);
}
}
您可以按以下方式使用它将数据发布到Web服务器：
var result = WebRequester.HttpPost(url, jsonData, userName, password);
结果将包含来自服务器的答案。