I have created a view called business this runs sucessfully ,but the problem is how will i use dynamic values in place of 12.925432,77.5940171 ,I want to pass parameter in sql query from c# code behind.
create view [dbo].[business] as
SELECT Id,
Name1,
ZipCode,
StreetName,
StreetNumber,
State1,
Lat,
Lng,
Keyword,
( 6371 * ACOS( COS( (12.925432/57.2958) ) * COS( (Lat/57.2958) ) * COS( ( Lng/57.2958 ) - (77.5940171/57.2958) ) + SIN( 12.925432/57.2958 ) * SIN( Lat/57.2958 ) ) ) AS distance
FROM Business_Details ;
This will be my query from c# code behind. ....
DataSet ds = new DataSet();
SqlCommand com = new SqlCommand();
SqlDataAdapter sqlda = new SqlDataAdapter(com);
//sqlda.SelectCommand.CommandText = "SELECT Id,Name1,ZipCode,StreetName,StreetNumber,State1,Lat,Lng,Keyword, ( 6371 * ACOS( COS( (12.925432/57.2958) ) * COS( (Lat/57.2958) ) * COS( ( Lng/57.2958 ) - (77.5940171/57.2958) ) + SIN( 12.925432/57.2958 ) * SIN( Lat/57.2958 ) ) ) AS distance FROM Business_Details where( (StreetName like '%jayanagar%')and (Keyword like '%plumbing%' ))ORDER BY distance;";
sqlda.SelectCommand.CommandText = "select *
from business
where (( distance < '" + radius + "' )
开发者_运维百科 and (StreetName like '%" + streetname + "%')
and (Keyword like '%" + keyword1 + "%' ))
order by distance";
sqlda.SelectCommand.Connection = con;
sqlda.Fill(ds);
con.Close();
.....
I think you would need a user defined function for that, so:
CREATE FUNCTION spherical_distance(@a float, @b float, @c float)
RETURNS float
AS
BEGIN
RETURN ( 6371 * ACOS( COS( (@a/@b) ) * COS( (Lat/@b) ) * COS( ( Lng/@b ) - (@c/@b) ) + SIN( @a/@b ) * SIN( Lat/@b ) ) )
END
create view [dbo].[business] as
SELECT Id,
Name1,
ZipCode,
StreetName,
StreetNumber,
State1,
Lat,
Lng,
Keyword
FROM Business_Details
Then in code you would need to do this:
sqlda.SelectCommand.CommandText = "select *, spherical_distance( 12.925432, 57.2958, 77.5940171) as distance
from business
where (( distance < '" + radius + "' )
and (StreetName like '%" + streetname + "%')
and (Keyword like '%" + keyword1 + "%' ))
order by spherical_distance(12.925432,57.2958,77.5940171)";
Then you would substitute values into the commandtext of the selectcommand instead of those numbers.
精彩评论