c# - 动态修改 ProfileBase ConnectionString

Question

我有以下代码，我想用它来修改ProfileBaseconnectionString：

ProfileBase profile = ProfileBase.Create(username);

string _connectionString = (_DataModel.Connection as System.Data.EntityClient.EntityConnection).StoreConnection.ConnectionString;

FieldInfo connectionStringField = profile.Providers["MySqlProfileProvider"].GetType().BaseType.GetField("_sqlConnectionString", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
connectionStringField.SetValue(profile.Providers["MySqlProfileProvider"], _connectionString);

profile["FirstName"] = firstName;
profile["Surname"] = surname;

profile.Save();

首先，connectionStringField总是返回为空，但是我可以看到它profile.Providers确实包含MySqlProfileProvider. 这是在 my 中指定的Web.Config：

<profile defaultProvider="MySqlProfileProvider">
  <providers>
    <clear/>
    <add name="MySqlProfileProvider" connectionStringName="MyApp" applicationName="MyApp" type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
  </providers>
  <properties>
    <add allowAnonymous="false" defaultValue="" name="FirstName" readOnly="false" serializeAs="String" type="System.String"/>
    <add allowAnonymous="false" defaultValue="" name="Surname" readOnly="false" serializeAs="String" type="System.String"/>
  </properties>
</profile>

我的问题是怎么connectionStringField回来为空？这是否意味着我不能像往常一样MembershipProvider通过覆盖其Initialize方法来修改连接字符串？

Answer 1

您使用了太多的基本类型：

.Providers["MySqlProfileProvider"].GetType()**.BaseType**.GetField
.Providers["MySqlProfileProvider"].GetType().GetField

以下代码应该可以工作：

string _connectionString = (_DataModel.Connection as System.Data.EntityClient.EntityConnection).StoreConnection.ConnectionString;
Type type = profile.Providers["MySqlProfileProvider"].GetType();
FieldInfo connectionStringField = type.GetField("_sqlConnectionString", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
connectionStringField.SetValue(profile.Providers["MySqlProfileProvider"], _connectionString);