sqlite数据库的使用helper
时间：2021-07-01 10:21:17
帮助过：2人阅读
public class SQLiteHelper
{
//public static String ConnectionString = "Data Source=H:/SQLite/DB/minWeiGanBu.db;Pooling=true;FailIfMissing=false";
//public static String ConnectionString = "Data Source=H:/SQLite/DB/aid/minWeiGanBu.db;Pooling=true;FailIfMissing=false";
static string ConnectionString = ConfigurationManager.ConnectionStrings["ConnStr"].ConnectionString.ToString().Replace("|path|",Tools.binPath + @"\DB");
private static void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn, string cmdText, params SQLiteParameter[] p)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Parameters.Clear();
cmd.Connection = conn;
cmd.CommandText = cmdText;
cmd.CommandType = CommandType.Text;
cmd.CommandTimeout = 30;
if (p != null)
{
foreach (object parm in p)
//cmd.Parameters.AddWithValue(string.Empty, parm);
cmd.Parameters.Add(parm);
}
}
public static DataSet ExecuteQuery(string cmdText, params SQLiteParameter[] p)
{
using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
{
using (SQLiteCommand command = new SQLiteCommand())
{
DataSet ds = new DataSet();
PrepareCommand(command, conn, cmdText, p);
SQLiteDataAdapter da = new SQLiteDataAdapter(command);
da.Fill(ds);
return ds;
}
}
}
public static int ExecuteNonQuery(string cmdText, params SQLiteParameter[] p)
{
using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
{
using (SQLiteCommand command = new SQLiteCommand())
{
PrepareCommand(command, conn, cmdText, p);
return command.ExecuteNonQuery();
}
}
}
public static SQLiteDataReader ExecuteReader(string cmdText, params SQLiteParameter[] p)
{
//using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
//{
SQLiteConnection conn = new SQLiteConnection(ConnectionString);
using (SQLiteCommand command = new SQLiteCommand())
{
PrepareCommand(command, conn, cmdText, p);
return command.ExecuteReader(CommandBehavior.CloseConnection);
}
//}
}
public static object ExecuteScalar(string cmdText, params SQLiteParameter[] p)
{
using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
{
using (SQLiteCommand command = new SQLiteCommand())
{
PrepareCommand(command, conn, cmdText, p);
return command.ExecuteScalar();
}
}
}
}
sqlite数据库的使用helper
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