/// <summary>
/// 创建当前的sql
/// </summary>
/// <returns></returns>
public string CreateSql()
{
UpdateAction update = new UpdateAction(Entity);
update.Cast <cms_user>()
.Where(u => u.username == "wangjun")
.UnCast()
.SqlKeyValue(cms_user.Columns.password, "1234567");
return(update.CreateSql(OperateEnum.Update));
}