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To create a User Control for add new rows dynamically using JavaScript, Asp.net, C#


User Control Code

AddMore.ascx

<%@ Control Language="c#" Inherits="Ind.UC.AddMore" CodeFile="AddMore.ascx.cs" %>

<table cellpadding="0" cellspacing="0" width="100%" align="center" id="tblAddMore">

<tr>

<td align="right">

<input class="button" id="btnAdd" type="button" value="Add Row" runat="server">

<input class="button" id="btnDelete" type="button" value="Delete Row" runat="server">

td>

tr>

<tr style="display:none">

<td align="right">

<input class="button" id="btnGet" type="button" value="Get Values" runat="server" />

<input type ="hidden" id ="hdnArray" />

td>

tr>

table>

<script language="javascript" src="js/CommonControls.js">script>

<script language="javascript" type="text/javascript">

function getObj(id) {

return document.getElementById(id);

}

function getAllValues(tableId)

{

var table = getObj(tableId);

var str="";

for(var i=1; i < style="">

{

str+="Row"+i+".value = ";

for(var j=0; j < style="">

{

for(var k=0; k <>

{

var childNode = table.rows[i].cells[j].childNodes[k];

if(childNode.type=="text")

str += "'"+childNode.value+"', ";

}

}

}

alert(str);

}

script>

AddMore.ascx.cs

namespace Ind.UC

{

using System;

using System.Web.UI.HtmlControls;

///

/// Summary description for AddMore.

///

public partial class AddMore : System.Web.UI.UserControl

{

//protected System.Web.UI.HtmlControls.HtmlInputButton btnDelete;

protected string clickEvent;

public string onclick {

get{return clickEvent;}

set{clickEvent = value;}

}

// private void Page_Load(object sender, System.EventArgs e) {

// // Put user code to initialize the page here

// }

#region Web Form Designer generated code

override protected void OnInit(EventArgs e) {

// CODEGEN: This call is required by the ASP.NET Web Form Designer.

InitializeComponent();

base.OnInit(e);

}

//Required method for Designer support - do not modify the contents of this method with the code editor.

private void InitializeComponent() {

//this.Load += new System.EventHandler(this.Page_Load);

//this.btnAddMore.Attributes.Add("onclick",this.clickEvent);

this.btnAdd.Attributes.Add("onclick", "javascript:addRowInATable('tblAddMorea')");

this.btnDelete.Attributes.Add("onclick", "javascript:deleteRowInATable('tblAddMorea')");

this.btnGet.Attributes.Add("onclick", "javascript:getAllValues()");

}

#endregion

protected void Page_Load(object sender, EventArgs e)

{

}

}

}

CommonControls.js

/*Commonly Used Functions*/

/*Created By : Ananda Thirumurugan.V */

/*Date : 15_JUNE_2007 */

var arrElements = new Array();

function callGrabFunction(tableID,hdnArray)

{

}

function getValuesInACell(cell) {

for(var i=0;i

var childNode = cell.childNodes[i];

getValuesOfAControl(childNode);

}

}

function getValuesOfAControl(control) {

if(control.type == "select-one") {

control.selectedIndex=0;

control.disabled=false;

}

else if(control.type == "text") {

alert(control.value);

//control.value = "";

//control.disabled=false;

//if(control.getAttribute("defaultRead")) {

// if(control.getAttribute("defaultRead") == 1)

// control.readOnly=true;

//}

}

else if(control.type == "textarea") {

control.value = "";

control.disabled=false;

}

else if(control.type == "checkbox") {

control.checked = false;

control.disabled=false;

}

else if(control.type == "select-multiple") {

for(var j=childNode.options.length-1;j>0;j--) {

if(control.options[j].selected == true)

control.options[j].selected == false;

//childNode.remove(j);

}

control.disabled=false;

}

}

//In

//function used to addrow in a table(Table id)

function addRowInATable(tableID) {

var tableObj = getId(tableID);

var rowObj = tableObj.insertRow(tableObj.rows.length);

addCellInARow(tableObj, rowObj);

assignRowClass(tableObj);

}

//function to add specific number of rows

function addSpecificRows(tblID, count) {

for(var i=0;i

addRowInATable(tblID);

//addRowInATable(tblID);

}

}

//In

//function adds a cell in a row(Table & row object)

function addCellInARow(tableObj, rowObj) {

for(var i=0; i

var cellObj = rowObj.insertCell(i);

cellObj.innerHTML = tableObj.rows[1].cells[i].innerHTML;

// alert(tableObj.rows[i].cells[0].innerHTML)

// alert(tableObj.rows[i].cells[i].innerHTML)

clearValuesInACell(cellObj);

}

}

//function calls corresponding function based on the control type

function correspondingClearCall(control) {

var type=returnControlType(control);

//alert(control.childNodes[0].tagName);

if(type=="DIV"){

}

else if(type="TABLE") {

dsarClearValuesInATable(control);

}

else if(type=="TR") {

dsarClearValuesInARow(control);

}

else if(type=="TD") {

clearValuesInACell(control);

}

else if(type.match(/INPUT|SELECT|TEXTAREA/gi)) {

clearValuesInAChildNode(control);

}

}

//

function returnControlType(control) {

return control.tagName;

}

/*//function

function clearValuesInADiv() {

var length = arguments.length;

for(var i=0;i

clearValuesInATable();

}

}*/

//In

//function clears value of a cell (function will not remove dropdown options)(cell).

function clearValuesInACell(cell) {

for(var i=0;i

var childNode = cell.childNodes[i];

clearValuesOfAControl(childNode);

}

}

//In

// function clears values of a control and also enables them

function clearValuesOfAControl(control) {

if(control.type == "select-one") {

control.selectedIndex=0;

control.disabled=false;

}

else if(control.type == "text") {

control.value = "";

control.disabled=false;

if(control.getAttribute("defaultRead")) {

if(control.getAttribute("defaultRead") == 1)

control.readOnly=true;

}

}

else if(control.type == "textarea") {

control.value = "";

control.disabled=false;

}

else if(control.type == "checkbox") {

control.checked = false;

control.disabled=false;

}

else if(control.type == "select-multiple") {

for(var j=childNode.options.length-1;j>0;j--) {

if(control.options[j].selected == true)

control.options[j].selected == false;

//childNode.remove(j);

}

control.disabled=false;

}

}

// function deletes a row in a table. Expects a table id as a parameter

function deleteRowInATable(tableId) {

var tableObj = getId(tableId)

for(var i=tableObj.rows.length-1;i>=1;i--) {

var length = tableObj.rows[i].cells[tableObj.rows[i].cells.length-1].childNodes.length;

for(var j=0;j

if(tableObj.rows[i].cells[tableObj.rows[i].cells.length-1].childNodes[j].type=="checkbox") {

if(tableObj.rows[i].cells[tableObj.rows[i].cells.length-1].childNodes[j].checked==true) {

var childNode=tableObj.rows[i].cells[tableObj.rows[i].cells.length-1].childNodes[j];

j=length;

deleteRowByControl(childNode);

}

}

}

}

}

//In

//function deletes the row containing the control.(control object)

function deleteRowByControl(control) {

var row=control.parentNode.parentNode;

var tableObj=row.parentNode;

if(row.rowIndex != 1) {

row.parentNode.deleteRow(row.rowIndex);

assignRowClass(tableObj);}

else {

alert("* This row cannot be deleted.");

control.checked=false;

return false;}

}

//In

//function applies alternating class to the rows in a table.(Table Object)

function assignRowClass(tableObj) {

for(var i=1;i

var rowObj = tableObj.rows[i];

if(rowObj.rowIndex%2==0)

rowObj.className="tablecontent2";

else

rowObj.className="tablecontent1";

}

}

//function returns necessary validation parameters

function returnValidationParameters(controlID) {

return controlID.valid.split("_");

}

//function validates only mandatory controls

function validateMandatoryControls(childNode) {

if((childNode.type == "text")||(childNode.type == "textarea")) {

if(trim(childNode.value)=="") {

alert(returnAlertMessage(childNode)+childNode.errname);

childNode.focus();

return false;}}

if(childNode.type == "select-one") {

if(trim(childNode.value)=="") {

alert(returnAlertMessage(childNode)+childNode.errname);

childNode.focus();

return false;}}

if(childNode.type == "select-multiple") {

if(!validateMutipleDropdown(childNode)) {

alert(returnAlertMessage(childNode)+childNode.errname);

childNode.focus();

return false;}}

return true;

}

//function returns true if any multiple dropdown option is selected (except Select)

function validateMutipleDropdown(control) {

for(var i=0;i

if(control.options[i].selected == true) {

if((control.options[i].value != "")||(control.options[i].value != "0"))

return true;}

}

return false;

}

//function enables divs(multiple, give as comma seperated(no ' or ""))//

function DSAREnableDivs() {

var length = arguments.length;

for(var i=0;i

arguments[i].style.display="block";}

}

//function disables divs(multiple, give as comma seperated(no ' or ""))//

function DSARDisableDivs() {

var length = arguments.length;

for(var i=0;i

arguments[i].style.display="none";}

}

//function removes spaces and returns the string

function trim(str) {

return str.toString().replace(/(^\s*|\s*$)/gi,"");

}

//

function showPopupPage(url) {

window.open(url,"","height=400,width=600,toolbar=no,minimize=no,status=no,memubar=no,location=no, scrollbars=yes");

}

//function returns object of any element / control, given the id.

function getId(controlID) {

return document.getElementById(controlID);

}

/*Commonly Used Functions*/

Default2.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"

Namespace="System.Web.UI" TagPrefix="asp" %>

<%@ Register Src="AddMore.ascx" TagName="AddMore" TagPrefix="uc1" %>

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 runat="server">

<title>Custom Controlstitle>

head>

<body>

<form id="form1" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server">

asp:ScriptManager>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<ContentTemplate>

<div>

<table cellpadding="0" cellspacing="0" width="100%" align="center" id="tblAddMorea">

<tr>

<td>

Add and delete demo:

td>

tr>

<tr>

<td>

<input type="text" />

td>

<td>

<input type="text" />

td>

<td>

<input type="text" />

td>

<td>

<input type="checkbox" />

td>

tr>

<uc1:AddMore ID="AddMore1" runat="server" />

table>

div>

ContentTemplate>

asp:UpdatePanel>

<input class="button" id="btnGets" type="button" value="Get Valuess" runat="server"

onclick="javascript:getAllValues('tblAddMorea')" />

form>

body>

html>

Default2.aspx.cs

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;

using System.Runtime.InteropServices;

public partial class Default2 : System.Web.UI.Page

{

[DllImport("user32.dll", CharSet = CharSet.Unicode)]

public static extern int MessageBox(IntPtr hWnd,String Text,String Caption,uint type);

protected void Page_Load(object sender, EventArgs e)

{

//MessageBox(new IntPtr(0), "Hello World", "Hello Dialog", 0);

}

}

Happy Coding!!!!

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