Dnn Code creates a user's createuser () method

I see a SectionCode:
Dim createstatus as usercreatestatus = usercontroller. createuser (ouserinfo)
Creates a user.
Then I want to find the definition about createuser.
Later, I found the createuser (ouserinfo) definition under namespace dotnetnuke. Entities. Users.
But in:
Public shared function createuser (byref objuser as userinfo) as usercreatestatus
The following information is found:
Createstatus = memberprovider. createuser (objuser)
I continue searching for the memberprovider class

Namespace dotnetnuke. Security. Membership has public mustinherit class membershipprovider

I found:

Public mustoverride function createuser (byref user as userinfo) as usercreatestatus
So where is the specific createuser () method defined.
I know that there is another sqlmembershipprovider in dnn, but where is it associated?

Actually, the specific instantiation of createuser is not in dotnetnuke. Entities. Users.
You see:
<textarea cols="50" rows="15" name="code" class="c-sharp">Createstatus = memberprovider. createuser (objuser)</textarea>
The definition of memberprovider is:
<textarea cols="50" rows="15" name="code" class="c-sharp">Private shared memberprovider as dotnetnuke. Security. Membership. membershipprovider = dotnetnuke. Security. Membership. membershipprovider. instance ()</textarea>
Find the definition of instance:
<textarea cols="50" rows="15" name="code" class="c-sharp">Public shared shadows function instance () as membershipprovider <br/> return dotnetnuke. componentmodel. componentfactory. getcomponent (of membershipprovider) () <br/> end Function</textarea>
This membershipprovider is obtained through web. config, and is defined in other web. config:
<textarea cols="50" rows="15" name="code" class="c-sharp"><Membership defaultprovider = "aspnetsqlmembershipprovider" userisonlinetimewindow = "15"> <br/> <Add name = "aspnetsqlmembershipprovider" type = "system. web. security. sqlmembershipprovider "connectionstringname =" sitesqlserver "character =" true "enablepasswordreset =" true "character =" false "character =" 7 "character =" 0 "requiresuniqueemail =" false "passwordformat =" encrypted "applicationname =" dotnetnuke "Description =" stores and retrieves membership data from the local Microsoft SQL Server database "/> <br/></textarea>
Here we finally know that the specific function instantiation is in:

Type = "system. Web. Security. sqlmembershipprovider"

. We found

System. Web. Security. sqlmembershipprovider <br/>

.

 

In fact

'Return the provider <br/> Public shared shadows function instance () as membershipprovider <br/> return dotnetnuke. componentmodel. componentfactory. getcomponent (of membershipprovider) () <br/> end Function

When the problem occurs, although I know it is related to sqlmembershipprovider, but I do not know how to associate it.

The getcomponent () is defined in namespace dotnetnuke. componentmodel.

Public Function getcomponent (of tcontract) () as tcontract <br/> verifycontainer () <br/> return container. getcomponent (of tcontract) () <br/> end Function

The definition of transition to iner is

# Region "Private Members" </P> <p> private _ container as icontainer </P> <p> # End Region </P> <p> # region "public properties "</P> <p> Public Property container () as icontainer <br/> Get <br/> return _ container <br/> end get <br/> set (byval value as icontainer) <br/> _ Container = value <br/> end set <br/> end property </P> <p> # End Region

I don't know how to find it later.