使用C#实现Workday Web Service认证时遇账号密码无效错误

Let's break down why you might be hitting this error even though your credentials work perfectly in SOAP UI—since SOAP UI handles a lot of the authentication plumbing automatically, the issue is almost certainly in how your .NET code is constructing the request or handling security.

First, let's recap your scenario for clarity:

You're using Workday Human Resources API v30.0, trying to replicate the official sample, but keep getting an "invalid username and password" error. The same credentials work in SOAP UI, and here's a snippet of your .NET code:

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;
// ... rest of your code implementation

Here are the most likely fixes to try:

• Validate your WS-Security header formatting
  Workday relies strictly on WS-Security for authentication. SOAP UI builds this header automatically, but if you're manually constructing your SOAP request or using a service reference with incorrect security settings, you might be missing critical elements. Use a tool like Fiddler or Wireshark to capture the raw request from SOAP UI, then compare it to what your .NET code sends. Ensure your code includes a UsernameToken with the correct password type (usually PasswordText for most Workday setups) and that all XML namespaces match exactly.

• Double-check your service reference configuration
  If you added a service reference in Visual Studio, head to your app.config/web.config and verify these settings:

  • The security mode should be set to TransportWithMessageCredential (Workday typically uses HTTPS with message-level credentials)
  • The clientCredentialType under message settings should be UserName
  • Make sure you're assigning credentials directly to the client object correctly, like this:

    var hrClient = new HumanResourcesPortClient();
    hrClient.ClientCredentials.UserName.UserName = "your-tenant-username";
    hrClient.ClientCredentials.UserName.Password = "your-password";
    

  Default service reference settings often don't align with Workday's requirements, so this is a common culprit.

• Check for character encoding issues
  If your password includes special characters (like &, <, >), SOAP UI automatically escapes them in the request, but manual string building in .NET might not. This can lead to a malformed authentication header that Workday rejects as invalid credentials. Use proper XML encoding for any credential strings in your code.

• Verify endpoint and namespace accuracy
  Ensure your code is targeting the exact v30.0 Human Resources API endpoint, and that all XML namespaces in your request match the ones specified in the official documentation. A mismatched namespace can cause Workday to misparse your authentication header, even if the credentials themselves are correct.

• Rule out IP whitelisting restrictions
  Even if SOAP UI works, the server running your .NET code might not be on Workday's allowed IP list. Workday often restricts API access to specific IP ranges for security—confirm with your Workday admin that your application's server IP is whitelisted for the tenant.

内容的提问来源于stack exchange，提问作者ProgSky