ASP.Net/Asp Control/Radio Button List

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Add ListItem to RadioButtonList

<script language="C#" runat="server">
protected void Page_Load(object o, EventArgs e) {
    if(!IsPostBack) {
        ListItem item;
        item = new ListItem("A", "1");
        languageRadioButtonList.Items.Add(item);
        item = new ListItem("B", "2");
        languageRadioButtonList.Items.Add(item);
        item = new ListItem("C", "3");
        languageRadioButtonList.Items.Add(item);
    }
}
protected void DropDownListSelectionChanged(object o, EventArgs e) {
    favoriteLanguage.Text = languageRadioButtonList.SelectedItem.Value;
}
</script>
<form runat="server">
<asp:RadioButtonList 
    id="languageRadioButtonList"
    runat="server" 
    OnSelectedIndexChanged="DropDownListSelectionChanged" >
</asp:RadioButtonList><br/>
Favorite Language: <b><asp:label runat="server" id="favoriteLanguage" style="color:blue" /></b><br />
<asp:button runat="server" Text="Submit"/>
</form>



Get selected item, value and text from asp:RadioButtonList (VB.net)

<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub SubmitBtn_Click(Sender As Object, E As EventArgs)
    lblMessage.Text = "Selected Text: " _
        & rbl1.SelectedItem.Text & "<BR>Selected Value: " _
        & rbl1.SelectedItem.Value & "<BR>Selected Index: " _
        & rbl1.SelectedIndex       
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Creating a Basic RadioButtonList Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
<asp:Label
    id="lblMessage"
    runat="server"
/>
<BR><BR>
<asp:RadioButtonList 
    id="rbl1" 
    runat="server"
    cellpadding="5"
    cellspacing="5"
    repeatcolumns="3"
    repeatdirection="Vertical"
    repeatlayout="Table"
    textalign="Right"
>
    <asp:ListItem value="12">Blue</asp:ListItem>
    <asp:ListItem value="11">Red</asp:ListItem>
    <asp:ListItem value="2">Green</asp:ListItem>
    <asp:ListItem value="32">Purple</asp:ListItem>
    <asp:ListItem value="8">Black</asp:ListItem>
    <asp:ListItem value="15" Selected>Gold</asp:ListItem>
</asp:RadioButtonList>
<BR><BR>
<asp:button 
    id="butOK"
    text="OK"
    type="Submit"
    onclick="SubmitBtn_Click" 
    runat="server"
/>
</form>
</BODY>
</HTML>



Get selected item value from asp:radiobuttonlist (VB.net)

<script runat="server" language="vb">
  Sub Page_Load()
   if Page.IsPostBack then
    Message.Text = "You have selected the following: " + radio1.SelectedItem.Value
   end if
  End Sub
</script>
<html>
  <head>
    <title>Radio Button List Example</title>
  </head>
  <body>
    <asp:label id="Message" runat="server" />
    <br /><br />
    Which city do you wish to look at hotels for?
    <br /><br />
    <form runat="server">
      <asp:radiobuttonlist id="radio1" runat="server">
        <asp:listitem id="option1" runat="server" value="Madrid" />
        <asp:listitem id="option2" runat="server" value="Oslo" />
        <asp:listitem id="option3" runat="server" value="Lisbon" />
      </asp:radiobuttonlist>
      <br /><br />
      <input type="Submit">
    </form>
  </body>
</html>



Get selected radio button from radio button list (C#)

<%@ Page Language="C#" %>
<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>
<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>



Get selected value from asp:radiobuttonlist (C#)

<script runat="server" language="C#">
  void Page_Load()
  { 
    if (Page.IsPostBack)
     { 
        Message.Text = "You have selected the following: " + radio1.SelectedItem.Value;
     }
  }
</script>
<html>
  <head>
    <title>Radio Button List Example</title>
  </head>
  <body>
    <asp:label id="Message" runat="server" />
    <br /><br />
    Which city do you wish to look at hotels for?
    <br /><br />
    <form runat="server">
      <asp:radiobuttonlist id="radio1" runat="server">
        <asp:listitem id="option1" runat="server" value="Madrid" />
        <asp:listitem id="option2" runat="server" value="Oslo" />
        <asp:listitem id="option3" runat="server" value="Lisbon" />
      </asp:radiobuttonlist>
      <br /><br />
      <input type="Submit">
    </form>
  </body>
</html>



On radiobutton list changed (VB.net)

<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub rbl_Changed(Sender As Object, E As EventArgs)
    Dim TheAlert as String
    TheAlert = "<SCRIPT LANGUAGE=""JavaScript"">" & Chr(13) _
        & "<!--" & Chr(13) & "alert(""You selected the color: " _
        & rbl1.SelectedItem.Text & """)" & Chr(13) _
        & "--><" & "/" & "SCRIPT>"
    Response.Write(TheAlert)
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Writing Code that Fires When an Item is Selected in a RadioButtonList Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
<asp:RadioButtonList 
    id="rbl1" 
    runat="server"
    autopostback="True"
    onselectedindexchanged="rbl_Changed"
>
    <asp:ListItem value="12">Blue</asp:ListItem>
    <asp:ListItem value="11">Red</asp:ListItem>
    <asp:ListItem value="2">Green</asp:ListItem>
</asp:RadioButtonList>
<BR><BR>
</form>
</BODY>
</HTML>



RadioButtonList Control

<%@ 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>RadioButtonList Control</title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:Label ID="lblTime" runat="server" OnInit="lblTime_Init"></asp:Label>
      <asp:radioButtonList
         id="rblSize" runat="server" 
         autoPostBack="true"
         cellSpacing="20"
         repeatColumns="3"
         repeatDirection="horizontal"
         RepeatLayout="table"
         textAlign="right"
         OnSelectedIndexChanged="rblSize_SelectedIndexChanged">
         <asp:ListItem text="10pt" value="10"/>  
         <asp:ListItem text="14pt" value="14"/>  
         <asp:ListItem text="16pt" value="16"/>  
      </asp:radioButtonList>
    </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 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();
   }
   protected void rblSize_SelectedIndexChanged(object sender, EventArgs e)
   {
     if (rblSize.SelectedIndex != -1)
     {
       int size = Convert.ToInt32(rblSize.SelectedItem.Value);
       lblTime.Font.Size = size;
     }
   }
 }



Select case for asp:radiobuttonlist (VB.net)

<script language="vb" runat="server">
Sub Page_Load()
  If Page.IsPostBack Then
    Select Case(Destination.SelectedItem.Value)
      Case "Barcelona":
        Message.Text = "Barcelona"
      Case "Oslo":
        Message.Text = "Oslo"
      Case "Lisbon": 
        Message.Text = "Lisbon"
      Case else
        Message.Text = "you did not select a destination we travel to"
    End Select
  End If
End Sub
</script>
<html>
<head></head>
<body>
  <form runat="server">
  Select your choice of destination:
  <br><br>
  <asp:radiobuttonlist id="destination" runat="server">
    <asp:listitem>Barcelona</asp:listitem>
    <asp:listitem>Oslo</asp:listitem>
    <asp:listitem>Lisbon</asp:listitem>
  </asp:radiobuttonlist>
  <br><br>
  <input type="submit" value="Submit Choice">
  <br><br>
  <asp:label id="message" runat="server"/>
</form>
</body>
</html>



select case statement for asp:radiobuttonlist (C#)

<script language="C#" runat="server">
void Page_Load()
{
  if (Page.IsPostBack) {
    switch(Destination.SelectedItem.Value) 
    {
      case "Barcelona":
        Message.Text = "You selected Spain"s lively Catalan city";
        break; 
      case "Oslo":
        Message.Text = "Experience the majesty of Norway"s capital city";
        break; 
      case "Lisbon": 
        Message.Text = "Portugal"s famous seaport and cultural hub";
        break; 
      default:
        Message.Text = "you did not select a destination we travel to";
        break; 
    }
  }
}
</script>
<html>
<head></head>
<body>
  <form runat="server">
  Select your choice of destination:
  <br><br>
  <asp:radiobuttonlist id="Destination" runat="server">
    <asp:listitem>Barcelona</asp:listitem>
    <asp:listitem>Oslo</asp:listitem>
    <asp:listitem>Lisbon</asp:listitem>
  </asp:radiobuttonlist>
  <br><br>
  <input type="submit" value="Submit Choice">
  <br><br>
  <asp:label id="Message" runat="server"/>
</form>
</body>
</html>



Set asp:RadioButtonList Repeat Layout (VB.net)

<%@ Page Language="vb" %>
<html>
<head>
   <title>Selection Control Example</title>
   <script runat="server">
      Sub Page_Load()
         MyCheckBox1.Checked = True
         MyRadioButton1.Checked = False
         MyListBox.SelectionMode = ListSelectionMode.Multiple
         MyDropDownList.SelectedIndex = 1
         MyCheckBoxList.RepeatDirection = RepeatDirection.Horizontal
         MyRadioButtonList.RepeatLayout = RepeatLayout.Table
      End Sub
   </script>
</head>
<body>
   <h1>Selection Control Example</h1>
   <form runat="server">
      <asp:table id="MyTable" border="1" cellpadding="5" cellspacing="0" runat="server">
         <asp:tablerow runat="server">
            <asp:tablecell runat="server">
               CheckBox Control:
            </asp:tablecell>
            <asp:tablecell runat="server">
               <asp:checkbox id="MyCheckBox1" 
                  text="Vanilla" runat="server" />
               <asp:checkbox id="MyCheckBox2" 
                  text="Chocolate" runat="server" />
            </asp:tablecell>
         </asp:tablerow>
         <asp:tablerow runat="server">
            <asp:tablecell runat="server">
               RadioButton Control:
            </asp:tablecell>
            <asp:tablecell runat="server">
               <asp:radiobutton id="MyRadioButton1" groupname="Group1" 
                  checked=True text="Yes" runat="Server"/>
               <asp:radiobutton id="MyRadioButton2" groupname="Group1"
                  text="No" runat="Server"/>
            </asp:tablecell>
         </asp:tablerow>
         <asp:tablerow runat="server">
            <asp:tablecell runat="server">
               ListBox Control:
            </asp:tablecell>
            <asp:tablecell runat="server">
               <asp:listbox id="MyListBox" runat="server">
                  <asp:listitem value="Vanilla" selected="true">Vanilla</asp:listitem>
                  <asp:listitem value="Chocolate">Chocolate</asp:listitem>
                  <asp:listitem value="Strawberry">Strawberry</asp:listitem>
               </asp:listbox>
            </asp:tablecell>
         </asp:tablerow>
         <asp:tablerow runat="server">
            <asp:tablecell runat="server">
               DropDownList Control:
            </asp:tablecell>
            <asp:tablecell runat="server">
               <asp:dropdownlist id="MyDropDownList" runat="server">
                  <asp:listitem value="Single" selected="true">Single</asp:listitem>
                  <asp:listitem value="Multiline">Multiline</asp:listitem>
                  <asp:listitem value="Password">Password</asp:listitem>
               </asp:dropdownlist>
            </asp:tablecell>
         </asp:tablerow>
         <asp:tablerow runat="server">
            <asp:tablecell runat="server">
               CheckBoxList Control:
            </asp:tablecell>
            <asp:tablecell runat="server">
               <asp:checkboxlist id="MyCheckBoxList"
                  repeatdirection="vertical" runat="server">
                  <asp:listitem value="Vanilla" text="Vanilla"/>
                  <asp:listitem value="Chocolate" text="Chocolate"/>
                  <asp:listitem value="Strawberry" text="Strawberry"/>
               </asp:checkboxlist>
            </asp:tablecell>
         </asp:tablerow>
         <asp:tablerow runat="server">
            <asp:tablecell runat="server">
               RadioButtonList Control:
            </asp:tablecell>
            <asp:tablecell runat="server">
               <asp:radiobuttonlist id="MyRadioButtonList" repeatdirection="Horizontal" runat="server">
                  <asp:listitem value="Female" text="Female" selected="true"/>
                  <asp:listitem value="Male" text="Male"/>
               </asp:radiobuttonlist>
            </asp:tablecell>
         </asp:tablerow>
      </asp:table>
   </form>
</body>
</html>



Setting and Retrieving the Selected Item in a RadioButton Control Group (VB.net)

<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
    If Not IsPostBack Then
        rdoColorYellow.Checked = True
    End If
End Sub
Sub SubmitBtn_Click(Sender As Object, E As EventArgs)
    Dim MyControl as Control
    Dim MyRadioButton as RadioButton
    For Each MyControl in frmMainForm.Controls
        If MyControl.GetType().FullName = "System.Web.UI.WebControls.RadioButton" Then
            MyRadioButton = MyControl
            If MyRadioButton.GroupName = "rgColors" then
                If MyRadioButton.Checked = "True" Then
                    lblColorSelected.Text = "You selected the color " _
                        & MyRadioButton.Text
                End If
            End If
        End If
    Next
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Setting and Retrieving the Selected Item in a RadioButton Control Group</TITLE>
</HEAD>
<form
    id="frmMainForm"
    runat="server"
>
<BR><BR>
<asp:Label 
    id="lblColorSelected" 
    runat="server"
/>
<BR>
Select your favorite Color:<BR>
<asp:radiobutton 
    id="rdoColorBlue"
    text="Blue" 
    font-size="12pt"
    font-name="Comic Sans MS"
    groupname="rgColors"
    runat="server" 
/>
<BR>
<asp:radiobutton 
    id="rdoColorGreen"
    text="Green" 
    font-size="12pt"
    font-name="Comic Sans MS"
    groupname="rgColors"
    checked="True"
    textalign="Left"
    runat="server" 
/>
<BR>
<asp:radiobutton 
    id="rdoColorYellow"
    text="Yellow" 
    font-size="12pt"
    font-name="Comic Sans MS"
    groupname="rgColors"
    textalign="Right"
    runat="server" 
/>
<BR><BR>
<asp:button 
    id="butOK"
    text="OK"
    Type="Submit"
    OnClick="SubmitBtn_Click" 
    runat="server"
/>
</form>
</BODY>
</HTML>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Asp_Control/Radio_Button_List&oldid=2103»