Manipulate Access database
OleDbConnection usage
string strConn = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=testDB.accdb";
OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();//Open
//conn.Close();//Close
//open data connection
public static OleDbConnection OpenConnection()
{
OleDbConnection conn = new OleDbConnection(strConn);
try
{
conn.Open();
}
catch(Exception ex)
{
Console.WriteLine("Open database exception: {0}",ex.Message);
}
return conn;
}
OleDbCommand usage
//Execute the SQL statement and return the number of rows affected
public static int ExecuteNonQuery(string strCmd)
{
int rows = 0;
OleDbConnection conn = OpenConnection();
if(conn.State == System.Data.ConnectionState.Open)
{
try
{
OleDbCommand comm = new OleDbCommand(strCmd, conn);
rows = comm.ExecuteNonQuery();//Returns the number of rows affected
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
conn.Close();
}
}
return rows;
}
//Execute the SQL statement and return the number of rows affected
// pass parameters
public static int ExecuteNonQuery(string strCmd, OleDbParameter[] values)
{
int rows = 0;
OleDbConnection conn = OpenConnection();
if(conn.State == System.Data.ConnectionState.Open)
{
try
{
OleDbCommand cmd = new OleDbCommand(strCmd, conn);
cmd.Parameters.AddRange(values);
rows = cmd.ExecuteNonQuery();
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
conn.Close();
}
}
return rows;
}
DataTable usage
// get the data table
public static DataTable GetDataTable(string strCmd)
{
DataTable table = new DataTable();
OleDbConnection conn = OpenConnection();
if(conn.State == ConnectionState.Open)
{
try
{
OleDbDataAdapter adapter = new OleDbDataAdapter(strCmd, conn);
adapter.Fill(table);
}
catch (Exception ex)
{
Console.WriteLine("GetDataTable:" + ex.Message);
}
finally
{
conn.Close();
}
}
return table;
}