参考:
http://www.runoob.com/aspnet/razor-cs-loops.html
<select id="task_isfirst" class="form-control savedata" >
@if (Model.isfirst == true)
{
<option value='true' selected='selected'>是</option>
<option value='false' >否</option>
}
else
{
<option value='true'>是</option>
<option value='false' selected='selected'>否</option>
} </select>
注意:else前面不用加@