C# - Populate Many GridView Controls From One Stored Procedure?

I have a stored procedure in SQL Server which returns seven result sets. I would like to call this stored procedure from ASP.NET and populate seven GridViews on my ASP.NET page with the results. I am using a SqlDataReader to get the data, however I'm struggling with the C# code to fill the GridViews.

I have created a DAL class to get the data and I have this method in there:

public SqlDataReader CheckDataIntegrity()
{
SqlCommand cmd = new SqlCommand("cc.DataCheck");
return MultipleResults(cmd);
}

The helper method MultipleResults looks like this:

private SqlDataReader MultipleResults(SqlCommand cmd)
{
SqlConnection con = new SqlConnection(_connectionString);

[Code]....