get web.config appsettings in javascript

var conn = '<%=ConfigurationManager.ConnectionStrings["MyConnString"].ConnectionString %>'
alert(conn);

var v1 = '<%=ConfigurationManager.AppSettings["var1"].ToString() %>'
var v1 = '<%=ConfigurationManager.AppSettings["var1"] %>'

<%$AppSettings:Title%>

alert(v1);

 

restrict textbox to allow only numerics

function numerics()
{
 key = String.fromCharCode(window.event.keyCode);
 if (!(key >= '0' && key <= '9'))   window.event.keyCode=0;
}
<asp:TextBox ID="txt1" Text=""  runat="server"  onkeypress=" return numerics();"></asp:TextBox>

function isAlpha(keyCode)
{
    return ((keyCode >= 65 && keyCode <= 90) || keyCode == 8||keyCode==37||keyCode==39||keyCode==9||keyCode==46)
}

function isNum(keyCode)
{
    return((keyCode < 105 && keyCode > 96)||(keyCode < 57 && keyCode > 48) || keyCode == 8||keyCode==37||keyCode==39||keyCode==9||keyCode==46)
}

<asp:TextBox ID="txtUserName" runat="server" onkeydown = "return isAlpha(event.keyCode);" onpaste =  "return false;" Width="130px"></asp:TextBox>

public static bool IsNumeric(String strVal)
    {
        Regex reg = new Regex("[^0-9-]");
        Regex reg2 = new Regex("^-[0-9]+$|^[0-9]+$");
        return (!reg.IsMatch(strVal) && reg2.IsMatch(strVal));
    }

check all checkboxes in a form

$(document).ready(function() {
            $('#chkAll').click(
             function() {
                 $("INPUT[type='checkbox']").attr('checked', $('#chkAll').is(':checked'));
             });
         });

checkbox list javascript validation

function valid()
    {   
       var chkBoxList = document.getElementById('<%=CheckBoxList11.ClientID %>');
        var chkBoxCount= chkBoxList.getElementsByTagName("input");
        var k=0;
        for(var i=0;i<chkBoxCount.length;i++)
        {
            if(chkBoxCount[i].checked)
            k++;
        }
        if(k==0)
        alert("select any item");
        return false;
    }

Remove duplicates from an interger array

int[] a = { 1, 3, 2, 5, 6, 1, 2, 3 };
string s =",";
for (int i = 0; i < a.Length - 1; i++)
{
if (!s.Contains("," + a[i].ToString() + ","))
{
s += "," + a[i].ToString() + ",";
}
}
string ss = s.Replace(",,",",");
string sss = ss.Substring(1,ss.Length-2).Trim();
string[] aa = ss.Split(',');
int[] n=new int[ss.Split(',').Length-2];
for (int i=1;i<aa.Length-1;i++)
{
        if (aa[i].Replace(",", "")!="")
        n[i-1] = int.Parse(aa[i].Replace(",",""));
}
return n;

cookie in js

$.cookie('test', $('#Text1').val());

array in javascript

<p id="div_p"></p>


var array = ["S", "V", "B"];
document.getElementById("div_p").innerHTML = array

var arrIDs=new Array();
arrIDs.push(e);
document.getElementById("div_p").innerHTML=arrIDs.join(',');

var arr = new Array(3);
arr[0] = "a";
arr[1] = "b";
arr[2] = "c";

var array1 = new Array("S", "V", "B");

//for object
var person = {firstName:"John", lastName:"Doe", age:46};


At position 2, add the new items, and remove 1 item:

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2, 1, "Lemon", "Kiwi");

The result of fruits will be:

Banana,Orange,Lemon,Kiwi,Mango