public DataTable ExecuteDataTable(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
MySqlCommand cmd = new MySqlCommand(SQLString, connection);
MySqlDataAdapter command = new MySqlDataAdapter(cmd);
command.Fill(ds, "ds");
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
throw new Exception(ex.Message);
}
return ds.Tables[0];
}
}

    string sqlstr = "SET IDENTITY_INSERT t1 ON;";lists.Add(sqlstr);sqlstr = "INSERT INTO t1       (id, name) VALUES ("+i.ToString()+", '" + i.ToString()+"');";lists.Add(sqlstr);sqlstr = "set identity_insert t1 off;";lists.Add(sqlstr);da.SqlCeExecuteNonQuery(lists);

 public void SqlCeExecuteNonQuery(List<string> lists) { SqlCeConnection conn = new SqlCeConnection(); SqlCeCommand comm = null; try { conn.ConnectionString = PDAConnectionLocStr; conn.Open(); comm = new SqlCeCommand("", conn); for (int i = 0; i < lists.Count; i++) { comm.CommandText = lists[i]; comm.ExecuteNonQuery(); } } catch (SqlCeException ex) { } finally { conn.Close(); conn.Dispose(); comm.Dispose(); } }

dangranusing System;
using System.Collections.Generic;
using System.Text;namespace WWFramework.DateTimes
{/// <summary>/// 时间相关函数/// </summary>public static class Function{/// <summary>/// 将Unix时间戳转换为DateTime类型时间/// </summary>/// <param name="d">double 型数字</param>/// <returns>DateTime</returns>public static System.DateTime ConvertIntDateTime(double d){System.DateTime time = System.DateTime.MinValue;System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));time = startTime.AddSeconds(d);return time;}/// <summary>/// 将c# DateTime时间格式转换为Unix时间戳格式/// </summary>/// <param name="time">时间</param>/// <returns>double</returns>public static double ConvertDateTimeInt(System.DateTime time){double intResult = 0;System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));intResult = (time - startTime).TotalSeconds;return intResult;}}
}