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HtmlInputCheckBox Konstruktor

  • Reference

Definice

Obor názvů:
System.Web.UI.HtmlControls
Sestavení:
System.Web.dll

Inicializuje novou instanci HtmlInputCheckBox třídy .

public:
 HtmlInputCheckBox();
public HtmlInputCheckBox ();
Public Sub New ()

Příklady

Následující příklad kódu ukazuje, jak vytvořit a inicializovat novou instanci HtmlInputCheckBox třídy.

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

<!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>
    <title>HtmlInputCheckBox Constructor Sample</title>
<script language="C#" runat="server">
       
       
       // Create a new instance of HtmlInputCheckBox.
       HtmlInputCheckBox cb = new HtmlInputCheckBox();

       // Create a new instance of Label.
       Label label = new Label();
       
       // Create a new instance of Button.
       HtmlButton b = new HtmlButton();

       protected void Page_Load(object sender, EventArgs e)
       {
           // Define attributes of Button and Label.
           b.InnerText = "Click";
           label.Text = "checkbox";
           
           // Add controls to placeholder
           Container.Controls.Add(cb);
           Container.Controls.Add(label);
           Container.Controls.Add(new LiteralControl("<br />"));
           Container.Controls.Add(b);
           
           // Add EventHandler
           b.ServerClick += new EventHandler(button_ServerClick);

       }
       
       void button_ServerClick(object sender, EventArgs e)
       {
           switch (cb.Checked)
           {
               case true:
                   Message.InnerHtml = "Checkbox is checked.";
                   break;

               default:
                   Message.InnerHtml = "Checkbox is not checked.";
                   break;
           }
       }
</script>

</head>

<body>

   <h3>HtmlInputCheckBox Constructor Sample</h3>

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

      <asp:PlaceHolder id="Container" runat="server"></asp:PlaceHolder>    
       
      <br />
      <span id="Message" 
            style="color:red" 
            runat="server"/>

   </form>

</body>
</html>

<%@ Page Language="VB" AutoEventWireup="True" %>

<!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>
    <title>HtmlInputCheckBox Constructor Sample</title>
<script language="VB" runat="server">

       ' Create a new instance of HtmlInputCheckBox.
       Dim cb As New HtmlInputCheckBox()

       ' Create a new instance of Label.
       Dim label As New Label()
       
       ' Create a new instance of Button.
       Dim b As New HtmlButton()
       
       Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
           
           ' Define attributes of Button and Label.
           b.InnerText = "Click"
           label.Text = "checkbox"
           
           ' Add controls to placeholder
           Container.Controls.Add(cb)
           Container.Controls.Add(label)
           Container.Controls.Add(New LiteralControl("<br />"))
           Container.Controls.Add(b)
           
           ' Add EventHandler
           AddHandler b.ServerClick, AddressOf button_ServerClick
          
       End Sub
       
       Sub button_ServerClick(ByVal sender As Object, ByVal e As EventArgs)
           Select Case cb.Checked
               Case True
                   Message.InnerHtml = "Checkbox is checked."
        
               Case Else
                   Message.InnerHtml = "Checkbox is not checked."
           End Select

       End Sub

</script>

</head>

<body>

   <h3>HtmlInputCheckBox Constructor Sample</h3>

   <form id="Form1" runat="server">

      <asp:PlaceHolder id="Container" runat="server"></asp:PlaceHolder>    
       
      <br />
      <span id="Message" 
            style="color:red" 
            runat="server"/>

   </form>

</body>
</html>

Poznámky

Pomocí tohoto konstruktoru můžete vytvořit a inicializovat novou instanci HtmlInputCheckBox třídy .

Následující tabulka ukazuje počáteční hodnotu vlastnosti pro instanci HtmlInputCheckBox.

Vlastnost Počáteční hodnota
TagName Řetězec literálu "zaškrtávací políčko".

Platí pro