asp.net C#时间段查询有关问题，怎么获取时间

asp.net C#时间段查询问题，如何获取时间
asp.net C#时间段查询问题，如何获取时间
代码如下
 string sqlstr = "select * from eNewView";
  string time1 = this.time1.Text.Trim();
  string time2 = this.time2.Text.Trim();


  if (time1 != "" && time2 != "")
  {

  if (wherestr.Trim() == "")
  {
  wherestr = "shijian >= '" + time1.Text.Trim() + "' AND shijian <= '" + time2.Text.Trim() + "'";
  }
  else
  {
  wherestr = wherestr + " AND shijian >= '" + time1.Text.Trim() + "' AND shijian <= '" + time2.Text.Trim() + "'";
  }

  }

主要是这部分代码，如何获取正确时间数据

 '" + time1.Text.Trim() + "'

[解决办法]
if (this.time1.Text.Trim() != "" && this.time2.Text.Trim() != "")
{

if (wherestr.Trim() == "")
{
wherestr = "shijian >= '" + time1.Text.Trim() + "' AND shijian <= '" + time2.Text.Trim() + "'";
}
else
{
wherestr = wherestr + " AND shijian >= '" + time1.Text.Trim() + "' AND shijian <= '" + time2.Text.Trim() + "'";
}

}