Question

I started to write project on asp.net and faced with trouble. When I try to execute this code:

System.Web.Security.Roles.CreateRole("User");

I get an exception:
An error occurred while attempting to initialize a System.Data.SqlClient.SqlConnection object. The value that was provided for the connection string may be wrong, or it may contain an invalid syntax.
Parameter name: connectionString

That’s part of the configuration of my project:

<configuration>
    <system.web>
      ...
      <roleManager enabled="true" defaultProvider="SqlRoleProvider">
        <providers>
          <clear/>
          <add name="SqlRoleProvider"
               connectionString="ForumDB"
               applicationName="/"
               type="System.Web.Security.SqlRoleProvider"/>
        </providers>
      </roleManager>
    </system.web>
  <connectionStrings>
    <clear/>
    <add name="ForumDB"
         connectionString="Data Source=(local)\SQLEXPRESS;Initial Catalog=ForumDB;Integrated Security=True;Pooling=False"
         providerName="System.Data.SqlClient"/>
  </connectionStrings>
</configuration>

I initially thought that the connection string has been written wrong, but I checked several times. Also this code works:

    var connectionString = ConfigurationManager.ConnectionStrings["ForumDB"];
    DbProviderFactory providerFactory = DbProviderFactories.GetFactory(connectionString.ProviderName);
    DbConnection connection = providerFactory.CreateConnection();
    connection.ConnectionString = connectionString.ConnectionString;
    connection.Open();

I am sure that the connection string has been written correctly. What is wrong?

Answer 1

I made a mistake here:

<roleManager enabled="true" defaultProvider="SqlRoleProvider">
    <providers>
        <clear/>
            <add name="SqlRoleProvider"
                connectionString="ForumDB"
                applicationName="/"
                type="System.Web.Security.SqlRoleProvider"/>
    </providers>
</roleManager>

I had to write:

connectionStringName="ForumDB"