Develop Reference

WinFormApp won't connect to the database

No clue why this won't work. It has worked before.
I do have the connection string in the app.config as well. I get the MySqlException error saying unable to connect to any database.
I made sure the firewall wasn't stopping it and I opened the ports on my router. All the references are in place too. This should work.
string connString = ConfigurationManager.ConnectionStrings["connString"].ConnectionString;
try
{
using (MySqlConnection Conn = new MySqlConnection(connString))
Conn.Open();
MessageBox.Show("DB Connected");
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
MessageBox.Show(ex.Message);
}

try this code
string connetionString = null;
MySqlConnection cnn ;
connetionString = "server=localhost;database=testDB;uid=root;pwd=abc123;";
cnn = new MySqlConnection(connetionString);
try
{
cnn.Open();
MessageBox.Show ("Connection Open ! ");
cnn.Close();
}
catch (Exception ex)
{
MessageBox.Show("Can not open connection ! ");
}

MySQL Databases cannot be used in WinFormApp due to security risks on a remote server. MS SQL DB's are supported. I didn't know that and I see a lot of questions about this so if anyone can't connect this may be why.

Issue in connecting to MS Access(accdb) database

I need to connect to MS Access database(*.accdb) using OdbcConnection class in my C# application.
Below is the code that I tried:
string connetionString = "Driver={Microsoft Access Driver (*.accdb)};DBQ=C:\\Temp\\Database4.accdb";
OdbcConnection myConnection = new OdbcConnection(connetionString);
try
{
myConnection.Open();
myConnection.Close();
}
catch (Exception ex)
{
}
But it gets the below exception on the myConnection.Open() call.
"ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not
found and no default driver specified"
But the above code is working for .mdb file if I use the connection string like below:
string connetionString = "Driver={Microsoft Access Driver (*.mdb)};DBQ=C:\\Temp\\Database4.mdb";
But my requirement is to connect to a .accdb file.
Any idea of what is wrong with my code or connection string format?

I got it working using the following the code:
const string connetionString = #"Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq=C:\Temp\Database4.accdb";
OdbcConnection myConnection = new OdbcConnection(connetionString);
myConnection.Open();
myConnection.Close();
Console.WriteLine("Done.");
Console.ReadLine();
But it will work only on x86 configuration and not with x64 configuration. For x64 configuration, we have to go for OleDbConnection class.
Thank you all..

Issue connecting to gearhost database

I'm trying to connect with C# code to a SQL Server database hosted on gear host using the System.Data.SqlClient library, but it doesn't work, I get an error "Server does not exist or connection refused."
Maybe I need do install some driver? Or is there anything wrong with my code?
string connetionString = "Data Source=mssql.gear.host:1433;Initial Catalog=databasename;User ID=userid;Password=mypassword";
SqlConnection cnn = new SqlConnection(connetionString);
try
{
cnn.Open();
Console.WriteLine("Connection Open!");
cnn.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}

when removing the port it works ,obviously the database in gear host doesn't use a port

Execute ObdcCommand for NetezzaSQL with C#

I am trying to execute a command with OdbcCommand in c# but it seems i can't even open the connection. This is the data I got to create the Connection String
Server: APPRDNETEZZA (192.168.0.64)
Web Server: beamprdwb3
ODBC DSN Name (64bit): NZ_FUTUREBRANDS
User: MSTR_ADMIN
Port: 5480
This is my code
string connetionString = null;
OdbcConnection cnn;
OdbcCommand cmd;
string sql = null;
connetionString = "Driver={NetezzaSQL}; servername=APPRDNETEZZA ;
database=NZ_FUTUREBRANDS; port=5480; username=MSTR_ADMIN;
password=mstr17Uz1%4;";
sql = "CREATE EXTERNAL TABLE X_STORE_GROUP_GUID_12345(" +
"STORE_ID VARCHAR(10)," +
"STORE_NAME VARCHAR(50)," +
"USERID Varchar(255)," +
"import_guid Varchar(255), )" +
"USING(" +"DATAOBJECT('/apnas01/vol2.nfs.Data/ap_prod/data/store_upload/scripts/12345_guid_12345')" + "logDir '/apps/ap_prod/log'" + " delimiter ','" + " "; ";
cnn = new OdbcConnection(connetionString);
try
{
cnn.Open();
Console.WriteLine("Connection Opened ");
cmd = new OdbcCommand(sql, cnn);
cmd.ExecuteNonQuery();
cmd.Dispose();
cnn.Close();
result = "Executed sucessfully";
}
catch (Exception ex)
{
result = "Error" + ex.InnerException.ToString();
}
The error happens when it tries to open the connection. While debugging it gave me this inner exception
[ODBC Driver Manager] Data source name not found and no default driver
specified
I have the Odbc driver installed in my machine. I dont know it this is happening cuz the connection string is in bad format. I have spent many hours trying to figure it out why doesnt work. Appreciate any kind of help. Thanks

Here is an example Netezza ODBC connection string:
https://www.connectionstrings.com/netezzasql-odbc-driver/
Driver={NetezzaSQL};servername=myServerAddress;port=myPortNumber;
database=myDataBase;username=myUsername;password=myPassword;
Your connection string basically looks the same:
connetionString = "Driver={NetezzaSQL}; servername=APPRDNETEZZA ;
database=NZ_FUTUREBRANDS; port=5480; username=MSTR_ADMIN;
password=xyz;";
SUGGESTIONS:
Make the entire connection string (everything inside the quotes) ONE LINE. Don't break the string into separate lines.
Or use "+" (like you did with your SQL string).
Copy the driver (nsqlodbc.dll?) into the same directory as your .exe assembly (path issue?)
Try both the 32-bit and 64-bit drivers (CPU platform issue?)
Definitely post back what you find!

Cannot connect to oracle server from c#

I have oracle 10g Express Edition installed and I'm trying to connect to it from C#.
I've created a ODBC Data Source called MyOracle from ODBC Data Source Administrator.
I'm using Windows XP and Visual Studio 2008 Express Edition.
Here's my code:
string connString = "dsn=MyOracle;User=user;Password=pass";
OdbcConnection connection = null;
OdbcCommand command = null;
OdbcDataReader reader = null;
try
{
connection = new OdbcConnection(connString);
connection.Open();
connection.Close();
connection.Dispose();
}
catch (Exception ex)
{
Console.WriteLine(string.Format("StackTrace:\n\n{0}\n",ex.StackTrace));
Console.WriteLine(string.Format("Message:\n\n{0}\n", ex.Message));
}
The console output tells me that the problem is at connection.Open();
Here's the output:
Any ideas?

Try to change your connection string to the following:
string connString = "DSN=MyOracle;UID=user;PWD=pass;Integrated Security=no;";