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Thread: C# reading result from a function

C# reading result from a function

From
drunken
Date:
Hi guys, I have a problem with a sipmle function in postgresql. The func()
calculates two integers to a result and returns it. The result is in the DB,
but not in the Console Line in C#. So for example when i have par1 = 2 and
par2 = 5 I get an DB entry with 7 in the result row, but the ConsoleLine is
empty.

What is wrong here?

BEGIN  Result := par1 + par2;  insert into  t1 (par1, par2, res) values (par1, par2, Result);  RETURN Result;
END;$BODY$ LANGUAGE plpgsql VOLATILE COST 100;
ALTER FUNCTION test_func(integer, integer) OWNER TO "Test";


*****************************
c#:
.....

DbParameter giveBack = cmd.CreateParameter();               giveBack.DbType = DbType.Int32;
giveBack.ParameterName= "Result";               giveBack.Direction = ParameterDirection.ReturnValue;
cmd.Parameters.Add(giveBack);
               cmd.Parameters["par1"].Value = 2;               cmd.Parameters["par2"].Value = 11;
connection.Open();
               if (connection.State == System.Data.ConnectionState.Open) {
Console.WriteLine(cmd.Parameters["par1"].Value);                  Int32 result = cmd.ExecuteNonQuery();
 Console.WriteLine("Status: {0}: Result: {1}", result,
 
cmd.Parameters["Result"].Value);               }

Console.WriteLine for par1 returns 2. Console.Writline for Result returns
nothing.



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Re: C# reading result from a function

From
Ashutosh Bapat
Date:
This mail is probably appropriate for some C# mailing list.

I am not familiar with C#, but in the above code, I do not see where is test_func() being called?

On Sat, Jul 4, 2015 at 1:44 PM, drunken <manuzi1@hotmail.com> wrote:
Hi guys, I have a problem with a sipmle function in postgresql. The func()
calculates two integers to a result and returns it. The result is in the DB,
but not in the Console Line in C#. So for example when i have par1 = 2 and
par2 = 5 I get an DB entry with 7 in the result row, but the ConsoleLine is
empty.

What is wrong here?

BEGIN
   Result := par1 + par2;
   insert into  t1 (par1, par2, res) values (par1, par2, Result);
   RETURN Result;
END;$BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100;
ALTER FUNCTION test_func(integer, integer)
  OWNER TO "Test";


*****************************
c#:
.....

DbParameter giveBack = cmd.CreateParameter();
                giveBack.DbType = DbType.Int32;
                giveBack.ParameterName = "Result";
                giveBack.Direction = ParameterDirection.ReturnValue;
                cmd.Parameters.Add(giveBack);

                cmd.Parameters["par1"].Value = 2;
                cmd.Parameters["par2"].Value = 11;
                connection.Open();

                if (connection.State == System.Data.ConnectionState.Open) {
                    Console.WriteLine(cmd.Parameters["par1"].Value);
                    Int32 result = cmd.ExecuteNonQuery();
                    Console.WriteLine("Status: {0}: Result: {1}", result,
cmd.Parameters["Result"].Value);
                }

Console.WriteLine for par1 returns 2. Console.Writline for Result returns
nothing.



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Best Wishes,
Ashutosh Bapat
EnterpriseDB Corporation
The Postgres Database Company

Re: C# reading result from a function

From
drunken
Date:
hello,

do you have a good c# mailing list? or do you mean it is in the wrong
"channel" here?

the function is called, but the code isnt here. I get the result from
par1+par2 into the database, but do not get the result in the c# command
line ;)

best regards from
Hamburg Germany



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