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Writing a Custom Claims Provider for SharePoint 2010 - Part 4: Supporting Resolve Name

Writing a Custom Claims Provider for SharePoint 2010 - Part 4: Supporting Resolve Name

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In the first three parts of this series we've implemented just about all of the support needed to do an end-to-end claims provider.  In this last post I'll describe how to name resolution support in the type-in control.  To add this support we'll need to implement the following property and methods:  SupportsResolve and FillResolve.  Now the good news is that I already covered how to implement SupportsResolve and one of the FillResolve overloads in part 3.  So this posting will be pretty short - here's the implementation for the other overload of FillResolve that was not covered in part 3:

protected override void FillResolve(Uri context, string[] entityTypes,

      string resolveInput,

      List<Microsoft.SharePoint.WebControls.PickerEntity> resolved)



//make sure picker is asking for the type of entity we

//return; site collection admin won't for example

if (!EntityTypesContain(entityTypes, SPClaimEntityTypes.FormsRole))



//same sort of code as in search to validate we have a match

foreach (string team in ourTeams)


      if (team.ToLower() == resolveInput.ToLower())


            //we have a match, create a matching entity

            PickerEntity pe = GetPickerEntity(team);


            //add it to the return list of picker entries






If you've been following along then this chunk of code should be completely straightforward.  If it isn't, then read through part 3 again. 

We are now code complete.  If I bring up the type-in control and enter a team name and then click the resolve button, here's what it looks like - first when you type it in, and then after clicking the resolve button:

And with that, we're done.  Hopefully you will find this information useful as you start building out your claims authentication plans.

  • Hi

    I read much of your blog and this special article is so cool. I create custom claim provider and register it as STS provider but wish you write how can login with a claim identity in low level mode without ADFS, i mean what is they way to set a custom Identity as current identity?

  • Hi Steve,

    Great article! Works great for adding a user to a user group.

    What if you want to add a user to 'Site Collection Administrators'?

    Due to the fist line in FillResolve() method, it skips resolving the user.

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