в 15:30, 26 мая 2010

2010-05-26T15:30:57Z

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2010-05-26T12:00:50Z

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== asp:RadioButton changed event (C#)==



<source lang="csharp">
File: Default.aspx
<%@ Page language="c#" Inherits="EventTracker" CodeFile="Default.aspx.cs" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Event Tracker</title>
</head>
<body>
<form id="Form1" runat="server">
<div>
<h1>Controls being monitored for change events:</h1>
<asp:TextBox ID="txt"
runat="server"
AutoPostBack="true"
OnTextChanged="CtrlChanged" />
<br /><br />
<asp:CheckBox ID="chk"
runat="server"
AutoPostBack="true"
OnCheckedChanged="CtrlChanged"/>
<br /><br />
<asp:RadioButton ID="opt1" runat="server" GroupName="Sample"
AutoPostBack="true" OnCheckedChanged="CtrlChanged"/>
<asp:RadioButton ID="opt2" runat="server" GroupName="Sample"
AutoPostBack="true" OnCheckedChanged="CtrlChanged"/>
<br /><br /><br />
<h1>List of events:</h1>
<asp:ListBox ID="lstEvents" runat="server" Width="355px"
Height="305px" /><br />
</div>
</form>
</body>
</html>

File: Default.aspx.cs
using System;
using System.Collections;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

public partial class EventTracker : System.Web.UI.Page
{
protected void Page_Load(object sender, System.EventArgs e)
{
Log("<< Page_Load >>");
}
private void Log(string entry)
{
lstEvents.Items.Add(entry);
lstEvents.SelectedIndex = lstEvents.Items.Count - 1;
}
protected void Page_PreRender(object sender, System.EventArgs e)
{
Log("Page_PreRender");
}
protected void CtrlChanged(Object sender, EventArgs e)
{
string ctrlName = ((Control)sender).ID;
Log(ctrlName + " Changed");
}
}</source>

== Get selected RadioButton==



<source lang="csharp">
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="test" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
What is your favorite ice cream flavor?
<br />
<br />
<asp:RadioButton ID="A" GroupName="flavors" runat="server" Text="A" /><br />
<br />
<asp:RadioButton ID="B" GroupName="flavors" runat="server" Text="B" /><br />
<br />
<asp:RadioButton ID="C" GroupName="flavors" runat="server" Text="C" /><br />
<br />
<asp:Button ID="btnSubmit" runat="server" Text="Click Me" /><br />
<br />
<asp:Label ID="results" runat="server"></asp:Label></div>
</form>
</body>
</html>

File: Default.aspx.vb

Partial Class test
Inherits System.Web.UI.Page
Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
If A.Checked Then
results.Text = "A"
ElseIf B.Checked Then
results.Text = "B"
ElseIf C.Checked Then
results.Text = "C"
End If
End Sub
End Class</source>

== Important properties, methods and events for RadioButton==



<source lang="csharp">
AccessKey: specify a key that navigates to the RadioButton control.
AutoPostBack: post the form containing the RadioButton back to the server automatically when the radio button is checked or unchecked.
Checked: get or set whether the RadioButton control is checked.
Enabled: disable the RadioButton.
GroupName: group RadioButton controls.
TabIndex: specify the tab order of the RadioButton control.
Text: label the RadioButton control.
TextAlign: align the RadioButton label. Possible values are Left and Right.
Focus: set the initial form focus to the RadionButton control.
CheckedChanged: Raised on the server when the RadioButton is checked or unchecked.
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (rdlMagazine.Checked)
lblResult.Text = rdlMagazine.Text;
if (rdlTelevision.Checked)
lblResult.Text = rdlTelevision.Text;
if (rdlOther.Checked)
lblResult.Text = rdlOther.Text;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show RadioButton</title>
</head>
<body>
<form id="form1" runat="server">
<div>
How did you hear about our Website?
<ul>
<li>
<asp:RadioButton
id="rdlMagazine"
Text="Magazine Article"
GroupName="Source"
Runat="server" />
</li>
<li>
<asp:RadioButton
id="rdlTelevision"
Text="Television Program"
GroupName="Source"
Runat="server" />
</li>
<li>
<asp:RadioButton
id="rdlOther"
Text="Other Source"
GroupName="Source"
Runat="server" />
</li>
</ul>
<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" OnClick="btnSubmit_Click" />
<hr />
<asp:Label
id="lblResult"
Runat="server" />
</div>
</form>
</body>
</html></source>

== Use AutoPostBack property to detect which RadioButton control is selected.==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void RadioButton_CheckedChanged(object sender, EventArgs e)
{
RadioButton selectedRadioButton = (RadioButton)sender;
lblResult.Text = selectedRadioButton.Text;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>RadioButton AutoPostBack</title>
</head>
<body>
<form id="form1" runat="server">
<div>
How did you hear about our Website?
<ul>
<li>
<asp:RadioButton
id="rdlMagazine"
Text="Magazine Article"
GroupName="Source"
AutoPostBack="true"
OnCheckedChanged="RadioButton_CheckedChanged"
Runat="server" />
</li>
<li>
<asp:RadioButton
id="rdlTelevision"
Text="Television Program"
GroupName="Source"
AutoPostBack="true"
OnCheckedChanged="RadioButton_CheckedChanged"
Runat="server" />
</li>
<li>
<asp:RadioButton
id="rdlOther"
Text="Other Source"
GroupName="Source"
AutoPostBack="true"
OnCheckedChanged="RadioButton_CheckedChanged"
Runat="server" />
</li>
</ul>
<hr />
<asp:Label
id="lblResult"
Runat="server" />
</div>
</form>
</body>
</html></source>

== Use RadioButton to set font size==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default_aspx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>RadioButton Control</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h1>RadioButton Control</h1>
<br />
<asp:Label ID="lblTime" runat="server" OnInit="lblTime_Init"></asp:Label>

<br />
<br />
<asp:RadioButton ID="rdoSize10" runat="server" GroupName="grpSize" AutoPostBack="True" Text="10pt" OnCheckedChanged="grpSize_CheckedChanged" />
<asp:RadioButton ID="rdoSize14" runat="server" GroupName="grpSize" AutoPostBack="True" Text="14pt" OnCheckedChanged="grpSize_CheckedChanged" />
<asp:RadioButton ID="rdoSize16" runat="server" GroupName="grpSize" AutoPostBack="True" Text="16pt" OnCheckedChanged="grpSize_CheckedChanged" />
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
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 Default_aspx : System.Web.UI.Page
{
protected void grpSize_CheckedChanged(object sender, EventArgs e)
{
if (rdoSize10.Checked)
lblTime.Font.Size = 10;
else if (rdoSize14.Checked)
lblTime.Font.Size = 14;
else lblTime.Font.Size = 16;
}
protected void lblTime_Init(object sender, EventArgs e)
{
lblTime.Font.Name = "Verdana";
lblTime.Font.Size = 20;
lblTime.Font.Bold = true;
lblTime.Font.Italic = true;
lblTime.Text = DateTime.Now.ToString();
}
}</source>

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ASP.NET Tutorial/ASP.net Controls/RadioButton - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия