DropDownList

ListBoxScenes.DataSource = olympicTickets.OlympicScenesGetInfo();ListBoxScenes.DataTextField = "OSceneInfo";ListBoxScenes.DataValueField = "OSceneID";ListBoxScenes.DataBind();ListItem list = new ListItem();list.Text = "请选择场次元素来形成场次";list.Value = "-1";ListBoxScenes.Items.Insert(0, list);ListBoxScenes.SelectedIndex = 0;    <script type="text/javascript">    window.onload=function()    {        document.all("DivScenes").style.height=document.body.scrollHeight;        document.all("ListBoxScenes").style.height=document.body.scrollHeight-16;        document.all("DivTime").style.height=document.body.scrollHeight-60;        document.all("ListBoxTime").style.height=document.body.scrollHeight-76;        document.all("DivFields").style.height=document.body.scrollHeight-60;        document.all("ListBoxFields").style.height=document.body.scrollHeight-76;        document.all("DivItem").style.height=document.body.scrollHeight-60;        document.all("ListBoxItem").style.height=document.body.scrollHeight-76;    }    </script><div id='DivItem' runat="server" style="z-index: 1; overflow: auto;">    <asp:ListBox ID="ListBoxItem" runat="server" Height="500"></asp:ListBox></div>SetListBoxWidthHight(ListBoxItem, DivItem, 200, 500, 10, 0);private int intCompare(int aint, int bint){    if (aint > bint)    {        return aint;    }    else    {        return bint;    }}private void SetListBoxWidthHight(ListBox lb,HtmlGenericControl hgc, int setWidth, int setHeight,int offsetWidth,int offsetHeight){    int realheight = (int)(((float)100 / 6) * lb.Items.Count) + offsetHeight;    int realWidth = 0;    for (int i = 0; i < lb.Items.Count; i++)    {        realWidth = intCompare(realWidth, assistantBll.GetStrLen(lb.Items[i].Text));    }            realWidth = (int)(((float)68 / 10) * realWidth) + offsetWidth;    if (realWidth < 50)    {        lb.Width = 50;        hgc.Style["width"] = "50px";    }    else    {        lb.Width = realWidth;        if (realWidth > setWidth)//宽度取小        {            hgc.Style["width"] = setWidth.ToString() + "px";        }        else        {            hgc.Style["width"] = realWidth.ToString() + "px";        }    }            if (realheight < setHeight)    {        lb.Height = setHeight;                }    else    {        lb.Height = realheight;                }            hgc.Style["height"] = (setHeight).ToString() + "px";}//取字符串实际长度    public int GetStrLen(string str)    {        System.Text.ASCIIEncoding n = new System.Text.ASCIIEncoding();        byte[] b = n.GetBytes(str);        int l = 0; // l 为字符串之实际长度        for (int i = 0; i <= b.Length - 1; i++)        {            if (b[i] == 63) //判断是否为汉字或全脚符号            {                l++;            }            l++;        }        return l;    }