Connecting to an External Database from AX 2012 using SqlClient classes

Here is how you can connect to an external database using X++ SqlClient class. This is among the few others approaches you can connect to an external database.

public System.Data.SqlClient.SqlConnection getConnection()
{
str connectionString;

System.Exception exception;
System.Data.SqlClient.SqlConnection connection;

connectionString = “Persist Security Info=False;User ID=UserID;Pwd=Password;Initial Catalog=DatabaseName;Data Source=localhost;”;

try
{
connection = new System.Data.SqlClient.SqlConnection(connectionString);
connection.Open();

return connection;
}
catch (Exception::Error)
{
error(“An exception has occurred.”);
}
catch (Exception::CLRError)
{
error(“A CLR exception has occurred.”);

exception = CLRInterop::getLastException();

if (exception != null)
{
info(exception.ToString());
}
}

return null;
}

To run a query after a successful connection, use this code:

System.Data.SqlClient.SqlConnection conn;
System.Data.SqlClient.SqlCommand cmd;
System.Data.SqlClient.SqlDataAdapter da;
System.Data.SqlClient.SqlDataReader dr;
System.Exception netExcepn;

str sql, attributeName, attributeValue;
str 30 materialCode;

mzkConnectToDB = new MzkConnectToDB();
conn = mzkConnectToMSDgen.getConnection();

sql = strFmt(“select * from tablename;”);
cmd = new System.Data.SqlClient.SqlCommand(sql,conn);

dr = cmd.ExecuteReader();

while(dr.Read())
{
try
{
materialCode = dr.get_Item(‘material_id’);

}
}
catch(Exception::Error)
{
error(“@SYS85688”);
}
}

//Close the connection.
dr.Close();
conn.Close();
}

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2 thoughts on “Connecting to an External Database from AX 2012 using SqlClient classes

  1. I want to ask in this regard, what could be the possible reason if this code continues to catch CLR exception while opening the connection? The catalog name and passwords are correct.

    Like

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