ASP.NET Tutorial/ASP.net Controls/CheckBoxList — различия между версиями

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Версия 15:30, 26 мая 2010

Adding ListItems Declararatively

<%@ Page Language="C#" %>
<!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>CheckBoxList Control</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h1>CheckBoxList Control</h1>
    <h2>Adding ListItems Declararatively</h2>
     <asp:CheckBoxList ID="cblItems" runat="server" AutoPostBack="True" CellPadding="5" CellSpacing="10" RepeatColumns="3" RepeatDirection="Horizontal" RepeatLayout="Flow" TextAlign="Left">
         <asp:ListItem> Item 1 </asp:ListItem>   
         <asp:ListItem> Item 2 </asp:ListItem>
         <asp:ListItem> Item 3 </asp:ListItem>
         <asp:ListItem> Item 5 </asp:ListItem>
         <asp:ListItem> Item 6 </asp:ListItem>
     </asp:CheckBoxList>
    
    </div>
    </form>
</body>
</html>


Adding ListItems from an Array

<%@ 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>CheckBoxList Control</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h1>CheckBoxList Control</h1>
    <h2>Adding ListItems from an Array</h2>
     <asp:CheckBoxList ID="cblGenre" runat="server" AutoPostBack="True" CellPadding="5" CellSpacing="10" RepeatColumns="3" OnInit="cblGenre_Init">
         <asp:ListItem> Item 1 </asp:ListItem>   
         <asp:ListItem> Item 2 </asp:ListItem>
         <asp:ListItem> Item 3 </asp:ListItem>
         <asp:ListItem> Item 4 </asp:ListItem>
         <asp:ListItem> Item 5 </asp:ListItem>
         <asp:ListItem> Item 6 </asp:ListItem>
     </asp:CheckBoxList>
    
    </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 cblGenre_Init(object sender, EventArgs e)
   {
     string[] Genre = { "A", "B", "C", "D", "E" };
     for (int i = 0; i < Genre.Length; i++)
     {
       this.cblGenre.Items.Add(new ListItem(Genre[i]));
     }
   }
 }


Adding ListItems from an Array Using DataBinding

<%@ 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>CheckBoxList Control</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h1>CheckBoxList Control</h1>
    <h2>Adding ListItems from an Array Using DataBinding</h2>
     <asp:CheckBoxList ID="cblGenre" runat="server" AutoPostBack="True" CellPadding="5" CellSpacing="10" RepeatColumns="3" OnInit="cblGenre_Init" >
         <asp:ListItem value="1"> Item 1 </asp:ListItem>
         <asp:ListItem text="Item 2" value="2"></asp:ListItem>
         <asp:ListItem text="Item 3"/>
         <asp:ListItem text="Item 4"> Inner Item 4 </asp:ListItem>
         <asp:ListItem value="5"></asp:ListItem>
         <asp:ListItem> Item 6 </asp:ListItem>
     </asp:CheckBoxList>
    
    </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 cblGenre_Init(object sender, EventArgs e)
   {
     string[] Genre = { "SciFi", "Novels", "Computers", "History", "Religion" };
     cblGenre.DataSource = Genre;
     cblGenre.DataBind();
   }
 }


Adding ListItems from an Array With a Value

<%@ 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>CheckBoxList Control</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h1>CheckBoxList Control</h1>
    <h2>Adding ListItems from an Array With a Value</h2>
     <asp:CheckBoxList ID="cblGenre" runat="server" AutoPostBack="True" CellPadding="5" CellSpacing="10" RepeatColumns="3" OnInit="cblGenre_Init">
         <asp:ListItem value="1"> Item 1 </asp:ListItem>
         <asp:ListItem text="Item 2" value="2"></asp:ListItem>
         <asp:ListItem text="Item 3"/>
         <asp:ListItem text="Item 4"> Inner Item 4 </asp:ListItem>
         <asp:ListItem value="5"></asp:ListItem>
         <asp:ListItem> Item 6 </asp:ListItem>
     </asp:CheckBoxList>
    
    </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 cblGenre_Init(object sender, EventArgs e)
   {
     string[] Genre = { "SciFi", "Novels", "Computers", "History", "Religion" };
     string[] Code = { "sf", "nvl", "cmp", "his", "rel" };
     for (int i = 0; i < Genre.Length; i++)
     {
       this.cblGenre.Items.Add(new ListItem(Genre[i], Code[i]));
     }
     }
}


Fill data into asp:CheckBoxList and get selected items (C#)

File: Default.aspx
<%@ Page language="c#" Inherits="CheckBoxTest" 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 runat="server">
  <title>CheckBoxTest</title>
</head>
<body>
  <form ID="Form1" runat="server">
    <div>
        Choose your favorite programming languages:<br /><br />
        <asp:CheckBoxList ID="chklst" runat="server" /><br /><br />
        <asp:Button ID="cmdOK" Text="OK" runat="server" OnClick="cmdOK_Click" />
        <br /><br />
        <asp:Label ID="lblResult" runat="server" />
    </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 CheckBoxTest : System.Web.UI.Page
{
  protected void Page_Load(object sender, System.EventArgs e)
  {
    if (this.IsPostBack == false)
    {
      chklst.Items.Add("C");
      chklst.Items.Add("C++");
      chklst.Items.Add("C#");
      chklst.Items.Add("Visual Basic 6.0");
      chklst.Items.Add("VB.NET");
      chklst.Items.Add("Pascal");
    }
  }
  protected void cmdOK_Click(object sender, System.EventArgs e)
  {
    lblResult.Text = "You chose:<b>";
    foreach (ListItem lstItem in chklst.Items)
    {
      if (lstItem.Selected == true)
      {
        // Add text to label.
        lblResult.Text += "<br />" + lstItem.Text;
      }
    }
    lblResult.Text += "</b>";
  }
}
Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/ASP.net_Controls/CheckBoxList&oldid=3422»