将Postman代码转为常规C#代码：Postman可登录VS中失败求助

Let's break down why your VS code isn't working even though Postman does, and fix it step by step.

Key Issues in Your Original Code #

Your current code is missing critical pieces that Postman handles automatically:

• No login credentials (username/password, plus any required hidden fields like CSRF tokens)
• A Postman-specific header that's unnecessary (and might cause issues)
• No cookie handling to maintain the login session

Corrected RestSharp Code (Older Versions) #

Here's a working version that addresses all these gaps:

using RestSharp;
using System.Net;

// Initialize the client with the login endpoint
var client = new RestClient("https://seller.digikala.com/Account/Login");
// Enable automatic cookie management to keep the login session alive
client.CookieContainer = new CookieContainer();

var request = new RestRequest(Method.POST);
// Keep necessary headers - remove the Postman-specific token
request.AddHeader("cache-control", "no-cache");
request.AddHeader("content-type", "application/x-www-form-urlencoded");
// Add a realistic User-Agent (some servers block requests without this)
request.AddHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36");

// Add ALL login parameters from Postman's Body tab
// Replace these with your actual credentials and any hidden fields (like CSRF tokens)
request.AddParameter("UserName", "your_seller_username");
request.AddParameter("Password", "your_seller_password");
// Example: If Postman shows a __RequestVerificationToken, add it here:
// request.AddParameter("__RequestVerificationToken", "your_csrf_token_value");

// Execute the request
IRestResponse response = client.Execute(request);

// Check the result
if (response.IsSuccessful)
{
    Console.WriteLine("Login successful!");
    // You can now use this client for subsequent authenticated requests
}
else
{
    Console.WriteLine($"Login failed: {response.StatusCode}");
    Console.WriteLine("Response content:");
    Console.WriteLine(response.Content);
}

For RestSharp v107+ (Modern API) #

If you're using the latest RestSharp version, the syntax has changed slightly:

using RestSharp;
using System.Net;

var clientOptions = new RestClientOptions("https://seller.digikala.com")
{
    CookieContainer = new CookieContainer() // Auto-handle session cookies
};

var client = new RestClient(clientOptions);
var request = new RestRequest("/Account/Login", Method.Post);

request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36");

// Add all required login parameters from Postman
request.AddParameter("UserName", "your_seller_username");
request.AddParameter("Password", "your_seller_password");
// Add any hidden fields you see in Postman's Body tab

var response = await client.ExecuteAsync(request);

if (response.IsSuccessStatusCode)
{
    Console.WriteLine("Login successful!");
}
else
{
    Console.WriteLine($"Login failed: {response.StatusCode}");
    Console.WriteLine(response.Content);
}

Critical Tips to Ensure Success #

1. Copy All Parameters from Postman:
   Open Postman, go to the Body tab (under x-www-form-urlencoded), and copy every key-value pair into your code with AddParameter. This includes hidden fields like CSRF tokens (__RequestVerificationToken) which are often required for login endpoints.
2. Remove Postman-Specific Headers:
   The postman-token header is only for Postman's internal tracking—servers don't expect it, so removing it prevents unnecessary errors.
3. Check for Additional Headers:
   In Postman's Headers tab, look for any other headers that are sent (like Referer or Accept). Add them to your request if they exist.
4. Use Postman's Code Generator:
   In Postman, click the Code button (top-right of the request builder), select C# (RestSharp)—this will generate the exact code Postman uses, which you can compare to your own to spot missing pieces.

内容的提问来源于stack exchange，提问作者Salar Afshar