检查一下。



http://jquerybyexample.blogspot.com/2010/10/set-max-length-for-aspnet-multiline.html [ ^ ]

请试试这个



< asp：textbox id =txtValuerunat =servertextmode = MultiLinerows =10columns =50>

please try this

<asp:textbox id="txtValue" runat="server" textmode="MultiLine" rows="10" columns="50">

（document）.ready（function（）{

var MaxLength = 250;

(document).ready(function(){
var MaxLength = 250;