<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MaxCharacterCount.aspx.cs" Inherits="MaxCharacterCount" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Limit the number of characters in multiline textbox</title>
<script type="text/javascript">
//This function is used to display the number of characters left and percentage graph
function CharactersCount() {
var CharLength = '<%=txtMessage.MaxLength %>';
var txtMsg = document.getElementById('txtMessage');
var lblCount = document.getElementById('lblChar');
var colorwidth = txtMsg.value.length;
var divcolor = document.getElementById('Colordiv');
if (txtMsg.value.length > CharLength) {
txtMsg.value = txtMsg.value.substring(0, CharLength);
}
lblCount.innerHTML = CharLength - txtMsg.value.length ;
if (colorwidth >= 1) {
divcolor.width = (colorwidth * 1.05) + "px";
divcolor.bgColor = 'red';
divcolor.height = 6 + "px";
}
else {
divcolor.width = 1 + "px";
divcolor.bgColor = '#9ED40A';
}
}
</script>
<style type="text/css">
.style1
{
width: 65%;
}
.lblstyle
{
background-color:#E2EEF1;
color:Red;
font-weight:bold;
font-size: 14px;
font-family: Tahoma;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td class="style1">
</td>
<td>
<span style=" font-family:Verdana; font-size:12px">Left:</span>
<asp:Label ID="lblChar" runat="server" Text="100" CssClass="lblstyle"></asp:Label>
</td>
</tr>
<tr>
<td class="style1"></td>
<td style="width:105px">
<table cellpadding="0" cellspacing="0" width="100%">
<tr style="background-color:#9ED40A; height:6px">
<td>
<div>
<table cellpadding="0" cellspacing="0">
<tr style="height:6px">
<td id="Colordiv" runat="server">
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="2">
<asp:TextBox ID="txtMessage" onkeyup="Javascript:CharactersCount();" runat="server" Style="overflow: hidden;" Height="80px" TextMode="MultiLine" Width="300px" MaxLength="100" />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Limit the number of characters in multiline textbox</title>
<script type="text/javascript">
//This function is used to display the number of characters left and percentage graph
function CharactersCount() {
var CharLength = '<%=txtMessage.MaxLength %>';
var txtMsg = document.getElementById('txtMessage');
var lblCount = document.getElementById('lblChar');
var colorwidth = txtMsg.value.length;
var divcolor = document.getElementById('Colordiv');
if (txtMsg.value.length > CharLength) {
txtMsg.value = txtMsg.value.substring(0, CharLength);
}
lblCount.innerHTML = CharLength - txtMsg.value.length ;
if (colorwidth >= 1) {
divcolor.width = (colorwidth * 1.05) + "px";
divcolor.bgColor = 'red';
divcolor.height = 6 + "px";
}
else {
divcolor.width = 1 + "px";
divcolor.bgColor = '#9ED40A';
}
}
</script>
<style type="text/css">
.style1
{
width: 65%;
}
.lblstyle
{
background-color:#E2EEF1;
color:Red;
font-weight:bold;
font-size: 14px;
font-family: Tahoma;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td class="style1">
</td>
<td>
<span style=" font-family:Verdana; font-size:12px">Left:</span>
<asp:Label ID="lblChar" runat="server" Text="100" CssClass="lblstyle"></asp:Label>
</td>
</tr>
<tr>
<td class="style1"></td>
<td style="width:105px">
<table cellpadding="0" cellspacing="0" width="100%">
<tr style="background-color:#9ED40A; height:6px">
<td>
<div>
<table cellpadding="0" cellspacing="0">
<tr style="height:6px">
<td id="Colordiv" runat="server">
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="2">
<asp:TextBox ID="txtMessage" onkeyup="Javascript:CharactersCount();" runat="server" Style="overflow: hidden;" Height="80px" TextMode="MultiLine" Width="300px" MaxLength="100" />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
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