c# - 从代码动态设置成员资格的连接字符串

我有一个.net Web应用程序，该应用程序使用成员资格进行用户验证。成员资格在web.config文件中有一个定义，并引用文件(web.config)中的连接字符串，我需要从代码中动态设置成员资格的连接字符串，以使其在web.config中不是静态的。

我怎样才能做到这一点？

提前致谢。

最佳答案

以下C#示例代码演示了如何通过configure a .NET membership provider programmatically来Jacques L. Chereau。此代码还要求您也将configure a connection string命名为MyDatabase

NameValueCollection objConfig = new NameValueCollection();
objConfig.Add("connectionStringName", "MyDatabase");
objConfig.Add("enablePasswordRetrieval", "false");
objConfig.Add("enablePasswordReset", "true");
objConfig.Add("requiresQuestionAndAnswer", "true");
objConfig.Add("applicationName", "MyApp");
objConfig.Add("requiresUniqueEmail", "true");
objConfig.Add("maxInvalidPasswordAttempts", "5");
objConfig.Add("passwordAttemptWindow", "10");
objConfig.Add("commandTimeout", "30");
objConfig.Add("passwordFormat", "Hashed");
objConfig.Add("name", "AspNetSqlMembershipProvider");
objConfig.Add("minRequiredPasswordLength", "8");
objConfig.Add("minRequiredNonalphanumericCharacters", "2");
objConfig.Add("passwordStrengthRegularExpression", "(?=^.{8,25}$)(?=.*\\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!@#$%^&*()_+}{\\":;'?/>.<,])(?!.*\\s).*$"));

SqlMembershipProvider objSqlMembershipProvider = new SqlMembershipProvider();
objSqlMembershipProvider.Initialize(objConfig["name"], objConfig);
MembershipProviderCollection colMembershipProviders = new MembershipProviderCollection();
colMembershipProviders.Add(objSqlMembershipProvider);
colMembershipProviders.SetReadOnly();

BindingFlags enuBindingFlags = BindingFlags.NonPublic | BindingFlags.Static;
Type objMembershipType = typeof(Membership);
objMembershipType.GetField("s_Initialized", enuBindingFlags).SetValue(null, true);
objMembershipType.GetField("s_InitializeException", enuBindingFlags).SetValue(null, null);
objMembershipType.GetField("s_HashAlgorithmType", enuBindingFlags).SetValue(null, "SHA1");
objMembershipType.GetField("s_HashAlgorithmFromConfig", enuBindingFlags).SetValue(null, false);
objMembershipType.GetField("s_UserIsOnlineTimeWindow", enuBindingFlags).SetValue(null, 15);
objMembershipType.GetField("s_Provider", enuBindingFlags).SetValue(null, objSqlMembershipProvider);
objMembershipType.GetField("s_Providers", enuBindingFlags).SetValue(null, colMembershipProviders);

假设您具有以下库引用:

using System.Web.Security;
using System.Collections.Specialized;
using System.Reflection;

编辑:

此方法在请求的生命周期中尽早设置成员资格提供程序中的连接字符串

private void SetMembershipProviderConnectionString(string connectionString)
{
   // Set private property of Membership. Untested code!!
   var connectionStringField = Membership.Provider.GetType().GetField("_sqlConnectionString", BindingFlags.Instance | BindingFlags.NonPublic);
   if (connectionStringField != null)
      connectionStringField.SetValue(Membership.Provider, connectionString);

}

未经测试，但从Application_PreRequestHandlerExecute内的Global.asax.cs调用此方法即可完成工作。