public static string ConnectionTest(string username, string passwd, bool connectAsDba)
{
OracleConnection conn = OracleHelpers.GetOracleConnection(username, passwd, connectAsDba);
conn.Open();
string testResult = "Connection state: " + conn.State;
conn.Close();
return(testResult);
}
public static List <WktWithName> WktPullTest(string username, string passwd, string tableName, int rowCount)
{
// conn to use
OracleConnection conn = OracleHelpers.GetOracleConnection(username, passwd, false);
// List to return
List <WktWithName> contents = new List <WktWithName>();
string testQueryString = ("select SDO_GEOMETRY.get_wkt(geom) from nemo." + tableName + " where rownum < " + (rowCount + 1).ToString()).ToString();
// has geom?
bool hasGeom = OracleHelpers.IsColumnNameExistInTableName(conn, tableName, "GEOM".ToString());
if (!hasGeom)
{
return(contents);
}
// has name?
bool hasName = OracleHelpers.IsColumnNameExistInTableName(conn, tableName, "NAME".ToString());
if (hasName)
{
// also grab the name.
testQueryString = ("select SDO_GEOMETRY.get_wkt(geom), NAME from nemo." + tableName + " where rownum < " + (rowCount + 1).ToString()).ToString();
}
Logging.Info("WktPullTest", "Constructed query: " + testQueryString);
// constructs command from string
OracleCommand command = new OracleCommand(testQueryString, conn);
// open db connection
conn.Open();
// then, executes the data reader
OracleDataReader reader = command.ExecuteReader();
try
{
while (reader.Read())
{
// Console.WriteLine(reader.GetString(0));
string wkt = reader.GetString(0);
string name = null;
if (hasName)
{
// some data still has null string even there is name column
// also, this proves to be useful when we didn't select name from the table.
try
{
name = reader.GetString(1);
}
catch (System.InvalidCastException e)
{
Logging.Warning("WktPullTest", "Experienced an InvalidCastException");
if (e.ToString().Split(new[] { '\r', '\n' }).FirstOrDefault() == "System.InvalidCastException: Column contains NULL data")
{
Logging.Warning("WktPullTest", "Experienced a null string");
}
name = null;
}
}
WktWithName temp = new WktWithName();
temp.wkt = wkt;
temp.name = name;
contents.Add(temp);
}
}
finally
{
// always call Close when done reading.
reader.Close();
}
conn.Close();
return(contents);
}
