Get return value in asp.net From SQL server

step1 : create stored procedure

CREATE  PROCEDURE dyntable (@ptable varchar(50),@new_var int  Output )

AS

BEGIN

 Select @new_var=count(*) from admin_master

return @new_var

END

GO

step 2:  Retrive in asp.net

 public void CreatefieldListTable(string strtablename)

    {

        string intconfirm = "";

      

        SqlConnection conn = new SqlConnection(objconn.GetConnection());

        SqlCommand cmdInsert = new SqlCommand("dyntable", conn);

        cmdInsert.CommandType = CommandType.StoredProcedure;

        cmdInsert.Parameters.AddWithValue("@ptable", strtablename);              

        SqlParameter var =new SqlParameter("@new_var",SqlDbType.Int); 

        var.Direction = ParameterDirection.Output;

        cmdInsert.Parameters.Add(var);

        conn.Open();

        SqlDataReader dtread;

        cmdInsert.ExecuteNonQuery();

        string str = Convert.ToString(cmdInsert.Parameters["@new_var"].Value);       

        conn.Close();

    }