where clause in asp.net Linq

 This Linq example show you how to use where clause with array

How to create Chart in asp.net ?

Create Chart control in asp.net

 Chart.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Chart.aspx.cs"

Inherits="Chart" %>

<%@ Register Assembly="System.Web.DataVisualization, Version=4.0.0.0,

Culture=neutral, PublicKeyToken=31bf3856ad364e35"

Namespace="System.Web.UI.DataVisualization.Charting"

TagPrefix="asp" %>
<!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 runat="server">
    <title>ASP.NET Chart Control Example</title>
</head>
<body>

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

<div>

<h1><b>ASP.NET Chart Control Example</b></h1>

<asp:Chart ID="ChartAspnet" runat="server" Height="400px" Width="500px">

<Series>

<asp:Series Name="SeriesASPNET" ChartType="Column" ChartArea="ChartAreaASPnet">

</asp:Series>

<asp:Series Name="SeriesASPNET1" ChartType="Column" ChartArea="ChartAreaASPnet">

</asp:Series>
 

</Series>
 

<ChartAreas>
 

<asp:ChartArea Name="ChartAreaASPnet">
 

</asp:ChartArea>
 

</ChartAreas>
 

</asp:Chart>
 

</div>

 

</form>
</body>
</html>

if condition in gridview source code page

if condition in gridview in source code or .aspx page

this will decrease many operation so performance increase. 

<Columns>
  <asp:TemplateField>
    <ItemTemplate>
      <asp:ImageButton ID="ifgridview" runat="server" 
         ImageUrl=<%# ((bool) Eval("condition"))? "yes.png":"no.png" %>
         OnClick="ifgridview_Click" />
    </ItemTemplate>
  </asp:TemplateField>
</columns>