Asp.net ile ilgili kod örnekleri

Delegates kullanımının farklı  yazılım örnekleri.

<script runat=”server”>
 void Page_Init() 
 {
  btn.Click += new EventHandler(btn_Click); 
 }
 void btn_Click(object sender, EventArgs e) 
 {
   lblResult.Text = DateTime.Now.ToString(); 
 }
</script>


<script runat=”server”>
 void Page_Init() 
 {
  btn.Click += delegate(object sender, EventArgs e) 
  {
   lblResult.Text = DateTime.Now.ToString(); 
  };
 }
</script>

<script runat=”server”>
 void Page_Init() 
 {
  btn.Click += (sender, e) => lblResult.Text = DateTime.Now.ToString(); 
 }
</script>

Linq ile sayfalama kod örneği

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Data.Linq;
public partial class Movie 
{
public static IEnumerable<Movie>
{
MyDatabaseDataContext db = n
return db.Movies;
}
public static IEnumerable<Movie>
  SelectPaged(
int startRowIndex, 
int maximumRows
) 
{
return Select().Skip(startRowIndex).Take(maximumRows);
}

public static int SelectCount() 
{
return Select().Count(); 
}
}

Asp.net ön yüz kodu

<asp:GridView 
id=”grdMovies” 
DataSourceID=”srcMovies” 
AllowPaging=”true” 
PageSize=”5” 
Runat=”server” />

<asp:ObjectDataSource 
id=”srcMovies” 
TypeName=”Movie” 
SelectMethod=”SelectPaged” 
SelectCountMethod=”SelectCount” 
EnablePaging=”true” 
Runat=”server” />

LightWeight Cacheleme

Önyüz kodu

<asp:ObjectDataSource 
id=”srcMovies” 
TypeName=”Movie” 
SelectMethod=”Select” 
EnableCaching=”true” 
CacheDuration=”9999” 
Runat=”server” />


Class Dosyamız

using System; 
using System.Web; 
using System.Collections.Generic; 
using System.Linq; 
using System.Data.Linq;
public partial class Movie 
{
public static IEnumerable<Movie> Select() 
{
MyDatabaseDataContext db = new MyDatabaseDataContext(); 
return db.Movies;
}
public static IEnumerable<Movie> SelectCached() 
{
HttpContext context = HttpContext.Current;
List<Movie> movies = (List<Movie>)context.Cache[“Movies”]; 
if (movies == null) 
{
movies = Select().ToList(); 
context.Cache[“Movies”] = movies; 
context.Trace.Warn(“Retrieving movies from database”);
} 
return movies;
}
}

UrlRewriting yaparken gelen sayfanının bulunamamasında yapılacak yönlendirme

void Page_Load() 
{
if (String.Compare(Request.Path, Request.RawUrl, true) != 0) 
lblMessage.Text = “The URL to this page has changed, “ +
“please update your bookmarks.”;
}

Asp.net ile online ziyaretçiyi gösterme

Global.asax
<%@ Application Language=”C#” %> 
<script runat=”server”>
void Application_Start(object sender, EventArgs e) 
{
Application[“SessionCount”] = 0; 
}
void Session_Start(object sender, EventArgs e) 
{
Application.Lock(); 
int count = (int)Application[“SessionCount”]; 
Application[“SessionCount”] = count + 1; 
Application.UnLock();
}
void Session_End(object sender, EventArgs e) 
{
Application.Lock(); 
int count = (int)Application[“SessionCount”]; 
Application[“SessionCount”] = count - 1; 
Application.UnLock();
} 
</script>

Ön yüz kodu

<script runat=”server”>
void Page_Load() 
{
lblSessionCount.Text = Application[“SessionCount”].ToString(); 
}
</script> 

Asp.net Jquery ile webservis sorgularken, webservisinin hata döndürdüğünü anlamak için eklenecek error attribute özelliğinini kullanımı

$(document).ready(function () { 
$(“#btnGet”).click(function () {
$.ajax({ 
type: “POST”, 
dataType: “json”, 
contentType: “application/json”, 
url: “QuotationService.asmx/GetQuote”, 
success: function (data) {
$(“#spanQuote”).html(data.d); 
}, 
error: function () {
alert(“The call to the web service failed.”); 
}
});
});