調用web services提示Access Denied的解決辦法[整理]

現象:
asp.net中調用web services時提示錯誤:
請求因   HTTP   狀態   401   失敗：Access   Denied。  

將web services放到另一台伺服器問題又不存在該問題。

解決辦法:
1.建立方法:
#region GetCredentialCache
/// <summary>
/// 擷取CredentialCache
/// 解決訪問web service時提示沒有許可權的問題
/// </summary>
/// <returns></returns>
public static CredentialCache GetCredentialCache()
{
 //許可權驗證web services地址
 string WSUrl = RightsServicesUrl;

 //Create an instance of the CredentialCache class.
 CredentialCache cache = new CredentialCache();

 // Add a NetworkCredential instance to CredentialCache.
 // Negotiate for NTLM or Kerberos authentication.
 cache.Add( new Uri(WSUrl), "Negotiate", new NetworkCredential("域使用者名稱", "域密碼", "域"));

 return cache;
}
#endregion

2.為web services指定CredentialCache
web services引用名為RightsControl，添加如下代碼：

RightsControl rightsControl = new RightsControl();
//為web services指定CredentialCache,最重要的就是這一句
rightsControl.Credentials = GetCredentialCache();
//調用rightsControl的方法