指教很简单的有关问题　小弟我迷惑了

请教高手指教很简单的问题　我迷惑了
请各位老师请帮我看看   我这段程序错在哪里啊
我将在第一个页面选择或则填写的内容传到第二个页面，但是有很多内容需要传递
我这个写的  
Response.Redirect( "http://localhost/sycar/cn/find2.aspx?type= ' "+ddl1.SelectedItem.Text.ToString()+ " '&name= ' "+tbname.Text.ToString()+ " '&price= ' "+ddl3.SelectedItem.Text.ToString()+ " '&year= ' "+   ddlyear.SelectedItem.Text.ToString()+ " '&month= ' "+ddlmonth.SelectedItem.Text.ToString()+ " '&day= ' "+ddlday.SelectedItem.Text.ToString()+ " '&area= ' "+ddl5.SelectedItem.Text.ToString()+ " '&dang= ' "+ddl6.SelectedItem.Text.ToString()+ " '&oil= ' "+ddl7.SelectedItem.Text.ToString()+ " ' ");
第二个页面是这样写的
string   type1=Page.Request.QueryString[ "type "].ToString().Trim();
string   name1=Page.Request.QueryString[ "name "].ToString().Trim();
string   price1=Page.Request.QueryString[ "price "].ToString().Trim();
string   year1=Page.Request.QueryString[ "year "].ToString().Trim();
string   month1=Page.Request.QueryString[ "month "].ToString().Trim();
string   day1=Page.Request.QueryString[ "day "].ToString().Trim();

string   area1=Page.Request.QueryString[ "area "].ToString().Trim();
string   dang1=Page.Request.QueryString[ "dang "].ToString().Trim();
string   oil1=Page.Request.QueryString[ "oil "].ToString().Trim();

strSql= "select   *   from   zcar   where   1=1 ";
if(type1!= " ")
{
strSql   += "   and     type= ' "+type1+ " ' ";


}
if(name1!= " ")
{
strSql   += "   and   name= ' "+name1+ " ' ";

}
if(price1!= " ")
{
strSql   += "   and   price= ' "+price1+ " ' ";
}
if(year1!= " ")
{
strSql   += "   and   yizumoyear <   ' "+year1+ " ' ";
}
if(month1!= " ")
{
strSql   += "   and   yizumomonth <   ' "+month1+ " ' ";
}
if(day1!= " ")
{
strSql   += "   and   yizumoday <   ' "+day1+ " ' ";
}
if(area1!= " ")
{
strSql   += "   and   suozaidi= ' "+area1+ " ' ";
}
if(dang1!= " ")
{
strSql   += "   and   chedang= ' "+dang1+ " ' ";
}
if(oil1!= " ")
{
strSql   += "   and   ranyou= ' "+oil1+ " ' ";
}
但是运行的时候   当我在第一个页面选择了一个内容时候     老是在第二个页面抱错说   我选择的内容附近有语法错误  


[解决办法]
Response.Redirect( "http://localhost/sycar/cn/find2.aspx?type= ' "+ddl1.SelectedItem.Text.ToString()+ " '&name= ' "+tbname.Text.ToString()+ " '&price= ' "+ddl3.SelectedItem.Text.ToString()+ " '&year= ' "+ ddlyear.SelectedItem.Text.ToString()+ " '&month= ' "+ddlmonth.SelectedItem.Text.ToString()+ " '&day= ' "+ddlday.SelectedItem.Text.ToString()+ " '&area= ' "+ddl5.SelectedItem.Text.ToString()+ " '&dang= ' "+ddl6.SelectedItem.Text.ToString()+ " '&oil= ' "+ddl7.SelectedItem.Text.ToString()+ " ' ");

________________> > > > > > > > > > > > > > > > > > > > > > > >


string url = string.Format( "http://localhost/sycar/cn/find2.aspx?type={0} ",Server.HtmlEncode(ddl1.SelectedItem.Text)); //type不要 ' ',另外，注意参数要编码。
Response.Redirect(url);