We are trying to deploy a Web Service on Azure Cloud Services that needs to access a remote Oracle DB.
We keep getting the following error when testing the connection:
System.Data.OracleClient 8.1.7 or greater required.
Here's the part of the code that we are using to connect:
using System.Data.OracleClient;
public string InsertUser_NOHA_UTENTI_Oracle(string cognome, string nome, string email)
{
string guid = Guid.NewGuid().ToString();
System.Configuration.ConnectionStringSettings css = System.Configuration.ConfigurationManager.ConnectionStrings["dbOracle"];
string query = "INSERT INTO NOHA_UTENTI (COGNOME,NOME,MAIL,TOKEN,STATO,DT_ISCRIZ,DT_CONF_ISCRIZ) values (#cognome, #nome, #email, #token, #stato, #dataIscrizione, #dataConfermaIscrizione)";
try
{
// create connection and command
using (OracleConnection cn = new OracleConnection("Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=xx.xx.xx.xx)(PORT=xxxx))(CONNECT_DATA=(SID=orcl)));User Id=xxxxxx;Password=xxxxxxx;"))
{
using (OracleCommand cmd = new OracleCommand(query, cn))
{
// define parameters and their values
cmd.Parameters.Add("#cognome", OracleType.VarChar, 50).Value = cognome;
cmd.Parameters.Add("#nome", OracleType.VarChar, 50).Value = nome;
cmd.Parameters.Add("#email", OracleType.VarChar, 50).Value = email;
cmd.Parameters.Add("#token", OracleType.VarChar, 50).Value = guid;
cmd.Parameters.Add("#stato", OracleType.VarChar, 1).Value = System.Configuration.ConfigurationManager.AppSettings["statoInAttesa"];
cmd.Parameters.Add("#dataIscrizione", OracleType.DateTime).Value = DateTime.Now;
cmd.Parameters.Add("#dataConfermaIscrizione", OracleType.DateTime).Value = null;
// open connection, execute INSERT, close connection
cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
return guid;
}
}
}
catch (Exception ex)
{
throw ex;
}
}
We tried to follow these solutions unsuccessfully:
http://www.splinter.com.au/using-the-new-odpnet-to-access-oracle-from-c/
http://omegacoder.com/?p=445
Could someone who has successfully deployed a similar application on Azure point us in the right direction?
Thanks in advance!
Related
I wrote the following code to find out if the user logging has an account at active directory so i may allow him to proceed and it's working fine:
public bool AuthenticateUser(string domain, string username, string password, string LdapPath)
{
string domainAndUsername = domain + #"\" + username;
DirectoryEntry entry = new DirectoryEntry(LdapPath, domainAndUsername, password);
try
{
// Bind to the native AdsObject to force authentication.
Object obj = entry.NativeObject;
DirectorySearcher search = new DirectorySearcher(entry);
search.Filter = "(SAMAccountName=" + username + ")";
search.PropertiesToLoad.Add("cn");
SearchResult result = search.FindOne();
if (null == result)
{
return false;
}
and it works great, the only problem is that i need to make the same thing using xamarin forms , how may I?
DirectorySearcher is a class that you would use from a server API/code.
I suggest you to create a Web API that would do the same job and that will be called by your Xamarin application.
this is my first time playing with WCF in visual studio (2015), and I am running into some problems.
I have my database hosted in appharbor. I managed to insert new items into the database with:
public Test Insert (Test TestTable)
{
SqlConnection conGet = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(connectionString, conGet);
cmd.Parameters.AddWithValue("#testID", testTable.testID);
cmd.Parameters.AddWithValue("#testName", testTable.testName);
conGet.Open();
cmd.CommandText = "INSERT INTO TestTable (testID, testName) VALUES (#testID, #testName)";
cmd.ExecuteScalar();
conGet.Close();
return testTable;
}
PROBLEM: when I tried to select from it:
public Test GetData(Test test)
{
SqlConnection conPut = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand("SELECT * FROM TestTable", conPut);
conPut.Open();
SqlDataReader rd = cmd.ExecuteReader();
if (rd.Depth>0)
{
while (rd.Read())
{
test.testID = (int)rd["testID"];
test.testName = rd["testName"].ToString();
}
}
else
{
Console.WriteLine("No rows found.");
}
conPut.Close();
return test;
}
rd (SqlDataReader) is not reading anything and just returns a null value, even though the test table has rows in it.
Please give me some pointers? I have tried several methods online, and no luck.. Thank you!
Remove that test for Depth. The Sql DataProvider doesn't support that property. It is always zero
Source: MSDN SqlDataReader.Depth
The outermost table has a depth of zero. The .NET Framework Data
Provider for SQL Server does not support nesting and always returns
zero.
If you want to test the condition of no rows then use the property HasRows
SqlDataReader rd = cmd.ExecuteReader();
if (rd.HasRows)
{
while (rd.Read())
{
test.testID = (int)rd["testID"];
test.testName = rd["testName"].ToString();
}
}
else
{
Console.WriteLine("No rows found.");
}
Note: I'm specifically not using Fluent NHibernate but am using 3.x's built-in mapping style. However, I am getting a blank recordset when I think I should be getting records returned.
I'm sure I'm doing something wrong and it's driving me up a wall. :)
Background / Setup
I have an Oracle 11g database for a product by IBM called Maximo
This product has a table called workorder which lists workorders; that table has a field called "wonum" which represents a unique work order number.
I have a "reporting" user which can access the table via the maximo schema
e.g. "select * from maximo.workorder"
I am using Oracle's Managed ODP.NET DLL to accomplish data tasks, and using it for the first time.
Things I've Tried
I created a basic console application to test this
I added the OracleManagedClientDriver.cs from the NHibernate.Driver on the master branch (it is not officially in the release I'm using).
I created a POCO called WorkorderBriefBrief, which only has a WorkorderNumber field.
I created a class map, WorkorderBriefBriefMap, which maps only that value as a read-only value.
I created a console application with console output to attempt to write the lines of work orders.
The session and transaction appear to open correct,
I tested a standard ODP.NET OracleConnection to my connection string
The Code
POCO: WorkorderBriefBrief.cs
namespace PEApps.Model.WorkorderQuery
{
public class WorkorderBriefBrief
{
public virtual string WorkorderNumber { get; set; }
}
}
Mapping: WorkorderBriefBriefMap.cs
using NHibernate.Mapping.ByCode;
using NHibernate.Mapping.ByCode.Conformist;
using PEApps.Model.WorkorderQuery;
namespace ConsoleTests
{
public class WorkorderBriefBriefMap : ClassMapping<WorkorderBriefBrief>
{
public WorkorderBriefBriefMap()
{
Schema("MAXIMO");
Table("WORKORDER");
Property(x=>x.WorkorderNumber, m =>
{
m.Access(Accessor.ReadOnly);
m.Column("WONUM");
});
}
}
}
Putting it Together: Program.cs
namespace ConsoleTests
{
class Program
{
static void Main(string[] args)
{
NHibernateProfiler.Initialize();
try
{
var cfg = new Configuration();
cfg
.DataBaseIntegration(db =>
{
db.ConnectionString = "[Redacted]";
db.Dialect<Oracle10gDialect>();
db.Driver<OracleManagedDataClientDriver>();
db.KeywordsAutoImport = Hbm2DDLKeyWords.AutoQuote;
db.BatchSize = 500;
db.LogSqlInConsole = true;
})
.AddAssembly(typeof(WorkorderBriefBriefMap).Assembly)
.SessionFactory().GenerateStatistics();
var factory = cfg.BuildSessionFactory();
List<WorkorderBriefBrief> query;
using (var session = factory.OpenSession())
{
Console.WriteLine("session opened");
Console.ReadLine();
using (var transaction = session.BeginTransaction())
{
Console.WriteLine("transaction opened");
Console.ReadLine();
query =
(from workorderbriefbrief in session.Query<WorkorderBriefBrief>() select workorderbriefbrief)
.ToList();
transaction.Commit();
Console.WriteLine("Transaction Committed");
}
}
Console.WriteLine("result length is {0}", query.Count);
Console.WriteLine("about to write WOs");
foreach (WorkorderBriefBrief wo in query)
{
Console.WriteLine("{0}", wo.WorkorderNumber);
}
Console.WriteLine("DONE!");
Console.ReadLine();
// Test a standard connection below
string constr = "[Redacted]";
OracleConnection con = new OracleConnection(constr);
con.Open();
Console.WriteLine("Connected to Oracle Database {0}, {1}", con.ServerVersion, con.DatabaseName.ToString());
con.Dispose();
Console.WriteLine("Press RETURN to exit.");
Console.ReadLine();
}
catch (Exception ex)
{
Console.WriteLine("Error : {0}", ex);
Console.ReadLine();
}
}
}
}
Thanks in advance for any help you can give!
Update
The following code (standard ADO.NET with OracleDataReader) works fine, returning the 16 workorder numbers that it should. To me, this points to my use of NHibernate more than the Oracle Managed ODP.NET. So I'm hoping it's just something stupid that I did above in the mapping or configuration.
// Test a standard connection below
string constr = "[Redacted]";
OracleConnection con = new Oracle.ManagedDataAccess.Client.OracleConnection(constr);
con.Open();
Console.WriteLine("Connected to Oracle Database {0}, {1}", con.ServerVersion, con.DatabaseName);
var cmd = new OracleCommand();
cmd.Connection = con;
cmd.CommandText = "select wonum from maximo.workorder where upper(reportedby) = 'MAXADMIN'";
cmd.CommandType = CommandType.Text;
Oracle.ManagedDataAccess.Client.OracleDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
Console.WriteLine(reader.GetString(0));
}
con.Dispose();
When configuring NHibernate, you need to tell it about your mappings.
I found the answer -- thanks to Oskar's initial suggestion, I realized it wasn't just that I hadn't added the assembly, I also needed to create a new mapper.
to do this, I added the following code to the configuration before building my session factory:
var mapper = new ModelMapper();
//define mappingType(s) -- could be an array; in my case it was just 1
var mappingType = typeof (WorkorderBriefBriefMap);
//use AddMappings instead if you're mapping an array
mapper.AddMapping(mappingType);
//add the compiled results of the mapper to the configuration
cfg.AddMapping(mapper.CompileMappingForAllExplicitlyAddedEntities());
var factory = cfg.BuildSessionFactory();
I've made a utility method to get schema from a db table. In this case Oracle 11 db.
public static DataTable GetColumnsSchemaTable(DbConnection cnctn, string tableName)
{
DataTable schemaTable;
string[] restrictions = new string[3] { null, tableName, null };
schemaTable = cnctn.GetSchema("Columns", restrictions);
/* table name is case sensitive and in XXXX db table names are UPPER */
if (schemaTable.Rows.Count == 0)
{
restrictions = new string[3] { null, tableName.ToUpper(), null };
schemaTable = cnctn.GetSchema("Columns", restrictions);
}
return schemaTable;
}
This works fine when the cnctn is created with System.Data.OracleClient provider factory. When it's created with System.Data.OleDb provider factory the table has no rows. I have an other utility method to get connection strings:
public static string GetDbConnectionString(DbConnection cnnctn, string provider, string server, string dbName, string user, string pwd)
{
if (cnnctn is OleDbConnection)
{
string usedProvider;
if (provider == null)
usedProvider = "msdaora";
else
usedProvider = provider;
return string.Format("Provider={0};Data Source={1};User Id={2};Password={3};",
usedProvider, dbName, user, pwd);
}
else if (cnnctn is System.Data.OracleClient.OracleConnection)
{
return string.Format("Data Source={0};User Id={1};Password={2};",
dbName, user, pwd);
}
else if (cnnctn is Oracle.DataAccess.Client.OracleConnection)
{
return string.Format("Data Source={0};User Id={1};Password={2};",
dbName, user, pwd);
}
else if (cnnctn is SqlConnection)
{
return string.Format("Data Source={0}; Initial Catalog={1}; User Id={2}; Password={3};",
server, dbName, user, pwd);
}
return string.Empty;
}
and the db connection works (i'm deleting rows before trying to get schema). All help will be appreciated.
Thanks & Best Regards - Matti
Ok. I sorted it out. I made this code long time ago only for now deprecated OracleClient and left the possibility to use other connections / provider factories. I didn't remember anymore that the restrictions vary from connection to connection. So the correct usage is:
string[] restrictions = new string[4] { null, null, tableName, null };
for OleDbConnection.
I have built a common app that works with PostgreSQL and should work on Oracle.
However i'm getting strange errors when inserting records through a parametrized query.
My formatted query looks like this:
"INSERT INTO layer_mapping VALUES (#lm_id,#lm_layer_name,#lm_layer_file);"
Unlike Npgsql which documents how to use the parameters, i could not found how Oracle "prefers" them to be used. I could only find :1, :2, :3, for example.
I do not wanto use sequential parameters, i want to use them in a named way.
Is there a way to do it? Am i doing something wrong?
Thanks
You can use named parameters with ODP.NET like so:
using (var cx=new OracleConnection(connString)){
using(var cmd=cx.CreateCommand()){
cmd.CommandText="Select * from foo_table where bar=:bar";
cmd.BindByName=true;
cmd.Parameters.Add("bar",barValue);
///...
}
}
I made this lib https://github.com/pedro-muniz/ODPNetConnect/blob/master/ODPNetConnect.cs
so you can do parameterized write and read like this:
ODPNetConnect odp = new ODPNetConnect();
if (!String.IsNullOrWhiteSpace(odp.ERROR))
{
throw new Exception(odp.ERROR);
}
//Write:
string sql = #"INSERT INTO TABLE (D1, D2, D3) VALUES (:D1, :D2, :D3)";
Dictionary<string, object> params = new Dictionary<string, object>();
params["D1"] = "D1";
params["D2"] = "D2";
params["D3"] = "D3";
int affectedRows = odp.ParameterizedWrite(sql, params);
if (!String.IsNullOrWhiteSpace(odp.ERROR))
{
throw new Exception(odp.ERROR);
}
//read
string sql = #"SELECT * FROM TABLE WHERE D1 = :D1";
Dictionary<string, object> params = new Dictionary<string, object>();
params["D1"] = "D1";
DataTable dt = odp.ParameterizedRead(sql, params);
if (!String.IsNullOrWhiteSpace(odp.ERROR))
{
throw new Exception(odp.ERROR);
}
Notes: you have to change these lines in ODPNetConnect.cs to set connection string:
static private string devConnectionString = "SET YOUR DEV CONNECTION STRING";
static private string productionConnectionString = "SET YOUR PRODUCTION CONNECTION STRING";
And you need to change line 123 to set environment to dev or prod.
public OracleConnection GetConnection(string env = "dev", bool cacheOn = false)