Wednesday, 20 November 2013

Handling drop-down list in a PHP form

This tutorial will show you how to add select boxes and multi-select boxes to a form, how to retrieve the input data from them, how to validate the data, and how to take different actions depending on the input.


Select box


Let’s look at a new input: a “select” box, also known as a “drop-down” or “pull-down” box. A select box contains one or more “options”. Each option has a “value”, just like other inputs, and also a string of text between the option tags. This means when a user selects “Male”, the “formGender” value when accessed by PHP will be “M”.


<p>
Gender :
<select name="formGender">
<option value="">Select</option>
<option value="M">Male</option>
<option value="F">Female</option>
</select>
</p>

The selected value from this input was can be read with the standard $_POST array just like a text input and validated to make sure the user selected Male or Female.



<?php

if(isset($_POST['formSubmit']) )
{
$varMovie = $_POST['formMovie'];
$varName = $_POST['formName'];
$varGender = $_POST['formGender'];
$errorMessage = "";
}
?>

It’s always a good idea to have a “blank” option as the first option in your select box. It forces the user to make a conscious selection from the box and avoids a situation where the user might skip over the box without meaning to. Of course, this requires validation.



<?php

if(!isset($_POST['formGender']))
{
$errorMessage .= "<li>You forgot to select your Gender!</li>";
}

?>


Handling drop-down list in a PHP form

Saturday, 9 November 2013

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Thursday, 7 November 2013

jQuery Display Progress Bar on Button Click in Asp dotnet

Here I will explain how to use jQuery to show progress bar on button click in asp.net with example in c#, vb.net or jQuery show loading image on button click in asp.net using c#, vb.net.


To implement this we need to write the code like as shown below in your aspx page



<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>jQuery show progress bar on button click asp.net</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.2.js"></script>
<style type="text/css">
.sample
{
background-color:#DC5807;
border:1px solid black;
border-collapse:collapse;
color:White;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div id="DisableDiv"> </div>
<input type="button" id="btnClick" value="Get Data" />
<div id="testdiv"></div>
</form>
<script type="text/javascript">
$(function() {
$('#btnClick').click(function() {
$('#DisableDiv').fadeTo('slow', .6);
$('#DisableDiv').append('<div style="background-color:#E6E6E6;position: absolute;top:0;left:0;width: 100%;height:300%;z-index:1001;-moz-opacity: 0.8;opacity:.80;filter: alpha(opacity=80);"><img src="loading.gif" style="background-color:Aqua;position:fixed; top:40%; left:46%;"/></div>');
setTimeout(function() { GetData() }, 1000)
})
});
function GetData()
{
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "ShowLoadingImageonButtonClick.aspx/BindDatatable",
data: "{}",
dataType: "json",
success: function(data) {
var theHtml = data.d;
$('#testdiv').html(theHtml)
$('#DisableDiv').html("");
},
error: function(result) {
alert("Error");
}
});
}
</script>
</body>
</html>

Now add following namespaces in code behind


C# Code



using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.Services;
using System.Web.UI;
using System.Web.UI.WebControls;

Once we add namespaces need write the code like as shown below

 protected void Page_Load(object sender, EventArgs e)
{
}
[WebMethod]
public static string BindDatatable()
{
GridView gv = new GridView();
System.IO.StringWriter stringWriter = new System.IO.StringWriter();
HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWriter);
DataTable dt = new DataTable();
using (SqlConnection con = new SqlConnection("Data Source=SureshDasari;Initial Catalog=MySampleDB;Integrated Security=true"))
{
using (SqlCommand cmd = new SqlCommand("select UserId,UserName,Location from UserInformation", con))
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
}
}
gv.HeaderStyle.CssClass = "sample";
gv.DataSource = dt;
gv.DataBind();
gv.RenderControl(htmlWriter);
return stringWriter.ToString();
}

VB.NET Code


 



Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.Services
Imports System.Web.UI
Imports System.Web.UI.WebControls

Partial Class VBCode
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
End Sub
<WebMethod()> _
Public Shared Function BindDatatable() As String
Dim gv As New GridView()
Dim stringWriter As New System.IO.StringWriter()
Dim htmlWriter As New HtmlTextWriter(stringWriter)
Dim dt As New DataTable()
Using con As New SqlConnection("Data Source=SureshDasari;Initial Catalog=MySampleDB;Integrated Security=true")
Using cmd As New SqlCommand("select UserId,UserName,Location from UserInformation", con)
con.Open()
Dim da As New SqlDataAdapter(cmd)
da.Fill(dt)
End Using
End Using
gv.HeaderStyle.CssClass = "sample"
gv.DataSource = dt
gv.DataBind()
gv.RenderControl(htmlWriter)
Return stringWriter.ToString()
End Function
End Class

Aspdotnet_jquery1


aspdotnet_jquery2


aspdotnet_jquery3



jQuery Display Progress Bar on Button Click in Asp dotnet