static void MultiThreading()
{
using (SqlDatabaseConnection cnn = new SqlDatabaseConnection("schemaname=db;uri=file://@memory;")) // In Memory database.
{
try
{
cnn.Open();
if (cnn.State != ConnectionState.Open)
{
Console.WriteLine("Unable to open connection.");
return;
}
}
catch (SqlDatabaseException e)
{
Console.WriteLine("Error: {0}", e.Message);
return;
}
using (SqlDatabaseCommand cmd = new SqlDatabaseCommand())
{
cmd.Connection = cnn;
cmd.CommandText = "CREATE TABLE IF NOT EXISTS TestTable (ThreadId Integer, Id Integer, RandomText Text, ByteArray Blob);";
cmd.ExecuteNonQuery();
}
Random rnd = new Random();
Parallel.For(0, Environment.ProcessorCount,
new ParallelOptions
{
MaxDegreeOfParallelism = Environment.ProcessorCount
},
i => {
using (SqlDatabaseCommand cmd = new SqlDatabaseCommand())
{
cmd.Connection = cnn;
string RandomPathForText = System.IO.Path.GetRandomFileName();
cmd.CommandText = "INSERT INTO TestTable VALUES (@ThreadId, @Id, @RandomText, @ByteArray);";
if (!cmd.Parameters.Contains("@ThreadId"))
{
cmd.Parameters.AddWithValue("@ThreadId", System.Threading.Thread.CurrentThread.ManagedThreadId);
}
else
{
cmd.Parameters["@ThreadId"].Value = System.Threading.Thread.CurrentThread.ManagedThreadId;
}
if (!cmd.Parameters.Contains("@Id"))
{
cmd.Parameters.AddWithValue("@Id", rnd.Next(1, 100));
}
else
{
cmd.Parameters["@Id"].Value = rnd.Next(1, 100);
}
if (!cmd.Parameters.Contains("@RandomText"))
{
cmd.Parameters.AddWithValue("@RandomText", RandomPathForText);
}
else
{
cmd.Parameters["@RandomText"].Value = RandomPathForText;
}
if (!cmd.Parameters.Contains("@ByteArray"))
{
cmd.Parameters.AddWithValue("@ByteArray", Encoding.UTF8.GetBytes(RandomPathForText));
}
else
{
cmd.Parameters["@ByteArray"].Value = Encoding.UTF8.GetBytes(RandomPathForText);
}
cmd.ExecuteNonQuery();
}
});
using (SqlDatabaseCommand cmd = new SqlDatabaseCommand(cnn))
{
cmd.CommandText = "SELECT * FROM TestTable; ";
cmd.ExecuteNonQuery();
SqlDatabaseDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
for (int c = 0; c < dr.VisibleFieldCount; c++)
{
//Console.Write(Encoding.UTF8.GetString(dr.GetFieldValue<byte[]>(c)) + "\t");
//byte[] byteArray = (byte[])dr.GetValue(c);
if (dr.GetName(c).Equals("ByteArray"))
{
Console.Write(Encoding.UTF8.GetString(dr.GetFieldValue <byte[]>(c)) + "\t");
}
else
{
Console.Write(dr.GetValue(c) + "\t");
}
}
Console.WriteLine("");
}
}
}
}
