How to replace null and blank with some value using case statement in sql server 2008

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SQL-Server-2008R2

In my table I want to display I am null when null value found in EmpName column and I am blank when blank value found in EmpName column, as table is designed, how to do this, please let me know

Create table #temp
(
	EmpID int,
	EmpName nvarchar(50)
)

-----------------------------------------

Insert into #temp Values(1,'Ram')
Insert into #temp Values(2,'')
Insert into #temp Values(3,Null)
Insert into #temp Values(4,'Shyam')
Insert into #temp Values(5,'')
Insert into #temp Values(5,Null)

-----------------------------------------

Select *, EmpName1=(CASE EmpName
WHEN NULL THEN 'I am Null'
WHEN '' THEN 'I am Blank'
ELSE EmpName
END) from #temp

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