jquary

change image src

$(this).attr("src", urlAbsolute)

check is check box checked

$('input[name="locationthemes"]:checked');

ASP.NET ADO.NET CACHING

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ASP_DEMO.CODE;
using System.Data;
namespace ASP_DEMO
{
    public partial class OfflineDBA : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
   
        DBAccess objdb = new DBAccess();
        protected void btnLoadData_Click(object sender, EventArgs e)
        {
            DataLoad();
        }


        void DataLoad() {


            DataSet ds = null;
            if (Cache["data"] == null)
            {
                string sql = "SELECT     ID, PID, QUESTION, ANSWER FROM  TB_QUESTIONS";
                ds = objdb.Select(sql);
                // ASSING THE PRIMARY KEY
                ds.Tables[0].PrimaryKey = new DataColumn[] {ds.Tables[0].Columns["ID"] };
                Cache["data"] = ds;
                lblMessage.Text = "get data from db";
            }
            else
            {
                ds = (DataSet)Cache["data"];
                lblMessage.Text = "get data from cache";
            }
            GridView1.DataSource = ds.Tables[0];
            GridView1.DataBind();
        }

        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            DataLoad();
        }

        protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
        {
         
        }

        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            GridView1.EditIndex = -1;
            DataLoad();
        }

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            if (Cache["data"] != null)
            {
                DataSet ds = (DataSet)Cache["data"];
                DataRow dr = ds.Tables[0].Rows.Find(e.Keys["ID"]);
                dr["PID"] = e.NewValues["PID"];
                dr["QUESTION"] = e.NewValues["QUESTION"];
                dr["ANSWER"] = e.NewValues["ANSWER"];

                Cache["data"] = ds;
                DataLoad();
            }
        }

        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            if (Cache["data"] != null)
            {
                DataSet ds = (DataSet)Cache["data"];
                DataRow dr = ds.Tables[0].Rows.Find(e.Keys["ID"]);
                ds.Tables[0].Rows.Remove(dr);

                Cache["data"] = ds;
                DataLoad();
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Cache.Remove("data");
        }
    }
}

///////////////////////////////////

 <table style="width: 100%;">
        <tr>
            <td>&nbsp;</td>
            <td>
                <asp:Button ID="btnLoadData" runat="server" OnClick="btnLoadData_Click" Text="Load Data" />
            &nbsp;<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
            </td>
            <td>&nbsp;</td>
        </tr>
        <tr>
            <td>&nbsp;</td>
            <td>
                <asp:Label ID="lblMessage" runat="server"></asp:Label>
            </td>
            <td>&nbsp;</td>
        </tr>
        <tr>
            <td>&nbsp;</td>
            <td>
                <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ID" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing" OnRowUpdated="GridView1_RowUpdated" OnRowUpdating="GridView1_RowUpdating" >
        <Columns>
            <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
            <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" ReadOnly="True" SortExpression="ID" />
            <asp:BoundField DataField="PID" HeaderText="PID" SortExpression="PID" />
            <asp:BoundField DataField="QUESTION" HeaderText="QUESTION" SortExpression="QUESTION" />
            <asp:BoundField DataField="ANSWER" HeaderText="ANSWER" SortExpression="ANSWER" />
        </Columns>
    </asp:GridView>
            </td>
            <td>&nbsp;</td>
        </tr>
        <tr>
            <td>&nbsp;</td>
            <td>
             
            </td>
            <td>&nbsp;</td>
        </tr>
    </table>