遍历页面上的下拉框元素，设置初始值的4种写法

            foreach (Control controls in Page.Form.Controls)
            {
               
                if (controls is System.Web.UI.WebControls.DropDownList  )
                {
                    System.Web.UI.WebControls.DropDownList c = (DropDownList)controls;
                    c.Items.Add(new ListItem("所有","所有"));
                }
            }

 

 foreach (Control controls in Page.Form.Controls)
            {
               
                if (controls.GetType()=="System.Web.UI.WebControls.DropDownList"  )
                {
                    System.Web.UI.WebControls.DropDownList c = (DropDownList)controls;
                    c.Items.Add(new ListItem("所有","所有"));
                }
            }

 

 foreach (Control controls in Page.Form.Controls)
            {
               
                if (controls.GetType()== typeof(System.Web.UI.WebControls.DropDownList))
                {
                    System.Web.UI.WebControls.DropDownList c = (DropDownList)controls;
                    c.Items.Add(new ListItem("所有","所有"));
                }
            }

 

foreach (Control controls in Page.Form.Controls)
            {
               
                if (controls.GetType().Equals(typeof(System.Web.UI.WebControls.DropDownList)))
                {
                    System.Web.UI.WebControls.DropDownList c = (DropDownList)controls;
                    c.Items.Add(new ListItem("所有","所有"));
                }
            }

 以上4种写法都可以，我也是主要学习一下typeof和gettype（）的用法

评论

2 楼 starnc 2009-05-06  

lobbychmd 写道

$('input[type=select]').val('所有') 哈哈

大哥，能不用jquery不

1 楼 lobbychmd 2009-05-06  

$('input[type=select]').val('所有')
哈哈