DataSource Controls :: Inserting Large Number Of Records?

I want to insert a large amount( approx 7000 records) of data into a table, My scenarios is that i need to check whether the record already exists then it will not insert it. Currently i am using a stored procedure for this which gets called for each record.

IF EXISTS(SELECT 'True' FROM MYTABLE WHERE ID = @ID)
BEGIN

--This means it exists, return it to ASP and tell us

SELECT 'This record already exists!'
END
ELSE
BEGIN

--This means the record isn't in there already, let's go ahead and add it

SELECT 'Record Added'
IF EXISTS(SELECT 'True' FROM [Aadil].[dbo].[SharePointSitesData] WHERE ID <> @ID)