In my previous article, we already covered
query string concepts. In this article, we will cover how to get record from database using query string parameter. For this types of problem, we will take two webform, first webform is used for sending querystring and pass into second web form.
Design pattern
Step-1 : Take two Web Form in solution explorer (default.aspx, default2.aspx)
Step-2 : Bind GridView on first page (default.aspx page) using
SqlDataSource control.
Step-3 : Check "select checkbox using show smart tag.
Step-4 : Handle GridView SelectedIndexChanged event , also generate QueryString in it. look like
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
Response.Redirect("~/Default2.aspx?id=" + GridView1.SelectedRow.Cells[1].Text);
}
Step-5 : In second page( Default2.aspx), Bind form view using SqlDataSource with Query String parameter.
Code view
Default.aspx with Default.aspx.cs page
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT * FROM [usertable]"></asp:SqlDataSource>
<div>
</div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataKeyNames="id" DataSourceID="SqlDataSource1"
onselectedindexchanged="GridView1_SelectedIndexChanged">
<Columns>
<asp:CommandField ShowSelectButton="True" />
<asp:BoundField DataField="id" HeaderText="id" InsertVisible="False"
ReadOnly="True" SortExpression="id" />
<asp:BoundField DataField="name" HeaderText="name" SortExpression="name" />
<asp:BoundField DataField="address" HeaderText="address"
SortExpression="address" />
</Columns>
</asp:GridView>
</form>
</body>
</html>
// Code view
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
Response.Redirect("~/Default2.aspx?id=" + GridView1.SelectedRow.Cells[1].Text);
}
}
Default2.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FormView ID="FormView1" runat="server" DataKeyNames="id"
DataSourceID="SqlDataSource1" Height="174px" Width="158px">
<EditItemTemplate>
id:
<asp:Label ID="idLabel1" runat="server" Text='<%# Eval("id") %>' />
<br />
name:
<asp:TextBox ID="nameTextBox" runat="server" Text='<%# Bind("name") %>' />
<br />
address:
<asp:TextBox ID="addressTextBox" runat="server" Text='<%# Bind("address") %>' />
<br />
<asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True"
CommandName="Update" Text="Update" />
<asp:LinkButton ID="UpdateCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</EditItemTemplate>
<InsertItemTemplate>
name:
<asp:TextBox ID="nameTextBox" runat="server" Text='<%# Bind("name") %>' />
<br />
address:
<asp:TextBox ID="addressTextBox" runat="server" Text='<%# Bind("address") %>' />
<br />
<asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True"
CommandName="Insert" Text="Insert" />
<asp:LinkButton ID="InsertCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</InsertItemTemplate>
<ItemTemplate>
id:
<asp:Label ID="idLabel" runat="server" Text='<%# Eval("id") %>' />
<br />
name:
<asp:Label ID="nameLabel" runat="server" Text='<%# Bind("name") %>' />
<br />
address:
<asp:Label ID="addressLabel" runat="server" Text='<%# Bind("address") %>' />
<br />
</ItemTemplate>
</asp:FormView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT * FROM [usertable] WHERE ([id] = @id)">
<SelectParameters>
<asp:QueryStringParameter Name="id" QueryStringField="id" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
</div>
</form>
</body>
</html>
Code Generate the following output
