ASP.Net/Data Binding/Bind a Property

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Bind a property Demo (VB.net)

   <source lang="csharp">

<%@ Page Language="VB" %> <html> <head> 

  <title>Simple DataBinding Example</title>
  <script runat="server">
     Dim FontColor As String
     Sub Page_Load()
        FontColor = "Red"
        DataBind()
     End Sub
  </script>

</head> <body>

Simple DataBinding Example

  The value for FontColor is 
     <font color="<%# FontColor %>"><%# FontColor %></font>.

</body> </html> 

      </source>


Bind DataList to Class Property (C#)

   <source lang="csharp">

<%@ Page language="c#" src="GuestBook.aspx.cs" AutoEventWireup="false" Inherits="GuestBook.GuestBook" %> <HTML> 

 <body>
   <form id="Form1" method="post" runat="server">

<asp:DataList id="GuestBookList" runat="server"> <SelectedItemStyle></SelectedItemStyle> <ItemStyle></ItemStyle> <FooterStyle></FooterStyle> <ItemTemplate> Left By: <%# DataBinder.Eval(Container.DataItem, "Author") %>
<%# DataBinder.Eval(Container.DataItem, "Message") %>
Left On: <%# DataBinder.Eval(Container.DataItem, "Submitted") %> </ItemTemplate> <HeaderStyle></HeaderStyle> </asp:DataList> 

       <asp:Label id="Label1" runat="server" Width="104px" Height="24px">Your Name:</asp:Label>
       <asp:Label id="Label2" runat="server" Width="104px" Height="24px">Your Message:</asp:Label>
       <asp:TextBox id="txtName" runat="server" Width="392px"></asp:TextBox>
       <asp:TextBox id="txtMessage" runat="server" Width="392px" Height="154px" TextMode="MultiLine"></asp:TextBox>
<asp:Button id="cmdSubmit" runat="server" Width="104px" Text="Submit"></asp:Button>
   </form>
 </body>

</HTML>

<%-- 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; using System.IO; namespace GuestBook { 

 /// <summary>
 /// Summary description for GuestBook.
 /// </summary>
 public class GuestBook : System.Web.UI.Page
 {
   protected System.Web.UI.WebControls.DataList GuestBookList;
   protected System.Web.UI.WebControls.Label Label1;
   protected System.Web.UI.WebControls.Label Label2;
   protected System.Web.UI.WebControls.TextBox txtName;
   protected System.Web.UI.WebControls.TextBox txtMessage;
   protected System.Web.UI.WebControls.Button cmdSubmit;
     private string guestBookName;
   private void Page_Load(object sender, System.EventArgs e)
   {
     guestBookName = Server.MapPath("GuestBook");
     if (!this.IsPostBack)
     {
       GuestBookList.DataSource = GetAllEntries();
       GuestBookList.DataBind();
     }
   }
   #region Web Form Designer generated code
   override protected void OnInit(EventArgs e)
   {
     //
     // CODEGEN: This call is required by the ASP.NET Web Form Designer.
     //
     InitializeComponent();
     base.OnInit(e);
   }
   
   /// <summary>
   /// Required method for Designer support - do not modify
   /// the contents of this method with the code editor.
   /// </summary>
   private void InitializeComponent()
   {    
     this.cmdSubmit.Click += new System.EventHandler(this.cmdSubmit_Click);
     this.Load += new System.EventHandler(this.Page_Load);
   }
   #endregion
   private void cmdSubmit_Click(object sender, System.EventArgs e)
   {
     BookEntry newEntry = new BookEntry();
     newEntry.Author = txtName.Text;
     newEntry.Submitted = DateTime.Now;
     newEntry.Message = txtMessage.Text;
     SaveEntry(newEntry);
     GuestBookList.DataSource = GetAllEntries();
     GuestBookList.DataBind();
     txtName.Text = "";
     txtMessage.Text = "";
   }
   private ArrayList GetAllEntries()
   {
     ArrayList entries = new ArrayList();
     DirectoryInfo guestBookDir = new DirectoryInfo(guestBookName);
     foreach (FileInfo fileItem in guestBookDir.GetFiles()){
       entries.Add(GetEntryFromFile(fileItem));
     }
     return entries;
   }
   private BookEntry GetEntryFromFile(FileInfo entryFile)
   {
     BookEntry newEntry = new BookEntry();
     StreamReader r = entryFile.OpenText();
     newEntry.Author = r.ReadLine();
     newEntry.Submitted = DateTime.Parse(r.ReadLine());
     newEntry.Message = r.ReadLine();
     r.Close();
     return newEntry;
   }
   private void SaveEntry(BookEntry entry)
   {
     string fileName = guestBookName + @"\";
     fileName += DateTime.Now.Ticks.ToString();
     FileInfo newFile = new FileInfo(fileName);
     StreamWriter w = newFile.CreateText();
     w.WriteLine(entry.Author);
     w.WriteLine(entry.Submitted.ToString());
     w.WriteLine(entry.Message);
     w.Flush();
     w.Close();
   }
 }

 public class BookEntry
 {
   private string author;
   private DateTime submitted;
   private string message;
   public string Author
   {
     get
     { return author; }
     set
     { author = value; }
   }
   public DateTime Submitted
   {
     get
     { return submitted; }
     set
     { submitted = value; }
   }
   public string Message
   {
     get
     { return message; }
     set
     { message = value; }
   }
 }

}

--%> 

      </source>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Data_Binding/Bind_a_Property&oldid=2059»