asp.net中TextMode="MultiLine"时,设置MaxLength长度不作用,如何解决?

Question

高手请进!!!

Answer 1

1.用验证控件
2.
<asp:textbox id=txtDetails style="Z-INDEX: 102; LEFT: 8px; POSITION: absolute; TOP: 44px" runat="server" Height="100px" Width="600px" TextMode="MultiLine"></asp:textbox>
<SCRIPT language=javascript>displaylimit("document.forms[0]._ctl0_txtDetails",2000)</SCRIPT>
</asp:Panel>
function displaylimit(theform,thelimit){
var limit_text='<span id="'+theform.toString()+'" style="VISIBILITY: hidden"></span>&nbsp;'
if (document.all||ns6)
document.write(limit_text)
if (document.all){
eval(theform).onkeypress=function(){ return restrictinput(thelimit,event,theform)}
eval(theform).onkeyup=function(){ countlimit(thelimit,event,theform)}
eval(theform).onfocus=function(){ countlimit(thelimit,event,theform)}
}
else if (ns6){
document.body.addEventListener('keypress', function(event) { restrictinput(thelimit,event,theform) }, true); 
document.body.addEventListener('keyup', function(event) { countlimit(thelimit,event,theform) }, true); 
}
}

Answer 2

function isOver(sText,len)
{
var intlen=sText.value.length;
if (intlen<=len && intlen>len/2)
intlen=bitLenght(sText);
if (intlen>len)
{ alert("The content length must Less than or Equal "+len);
sText.focus();
sText.select();
}
}function bitLenght(sText)
{
var intlen;
intlen=0;
for(var i=0; i<sText.value.length; i++)
{
if(sText.value.charCodeAt(i)>255)
{
intlen=intlen+2;
}
else
{
intlen++;
}
}
return intlen;
}
this.txtDescription.Attributes.Add("onblur","isOver(this,2000);");

Answer 3

<asp:TextBox style="height:200px;" id="txtMemo" MaxLength="60" runat="server" Width="100%" TextMode="MultiLine"></asp:TextBox>