从代码动态设置成员资格的连接字符串

Question

我有一个.net Web应用程序,它使用会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中的连接字符串(web.config),我需要在web.config中动态地设置代码的成员关系的连接字符串不是静态的.

我怎样才能做到这一点？

提前致谢.

Answer 1

以下C#示例代码演示了如何通过Jacques L. Chereau以编程方式配置.NET成员资格提供程序.此代码要求您还配置名为的连接字符串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);

}

没有经过测试,但从Global.asax.cs里面调用这个方法Application_PreRequestHandlerExecute可以完成工作.