Character Counter for Multiline Textbox in asp.net
.ASPX Code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="tbcount.aspx.cs" Inherits="tbcount" %>
<script language = "Javascript">
function tbLimit() {
var tbObj=event.srcElement;
if (tbObj.value.length==tbObj.maxLength*1) return false;
}
function tbCount(visCnt)
{
var tbObj=event.srcElement;
if (tbObj.value.length>tbObj.maxLength*1)
tbObj.value=tbObj.value.substring(0,tbObj.maxLength*1);
if (visCnt)
visCnt.innerText=tbObj.maxLength-tbObj.value.length;
}
</script>
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"
Columns="30" Rows="10"
TextMode="MultiLine" ></asp:TextBox>
<br />
<asp:Label ID="Label1" runat="server"></asp:Label></div>
</form>
</body>
</html>
.CS CODE;
-----------------------------------------Code
Behind----------------------------------------
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class tbcount : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
TextBox1.Attributes.Add("onkeypress", "return tbLimit();");
TextBox1.Attributes.Add("onkeyup", "return tbCount(" + Label1.ClientID + ");");
TextBox1.Attributes.Add("maxLength", "500");
}
}
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