How to Use Query String in asp.net

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ASP.NET QueryString with single value:



The Request.QueryString collection is a NameValueCollection internally. In Asp.net web development  QueryString is a property getter for an internal Name Value Collection.

In this Example we take one textbox control and one button on page textbox for entering message by user and we want to show this entered message on other page.

Code of QueryString.aspx:


<%@ Page Language="C#" AutoEventWireup="true" CodeFile="QueryString.aspx.cs"
    Inherits="FirstQueryString" %>

<!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 id="Head1" runat="server">
    <title>QueryString Example in asp.net</title>
    <style type="text/css">
        .style1
        {
            font-size: x-large;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div align="center" class="style1" style="padding: 2px; margin: 2px">
        Use Query String Example for sendeing text :
    </div>
    <asp:TextBox ID="TextBox1" runat="server" Height="66px" Width="428px"></asp:TextBox>
&nbsp;&nbsp;&nbsp;&nbsp;
    <asp:Button ID="btn" runat="server" Height="63px" onclick="btn_Click"
        Text="Click here" Width="148px" />
    <br />
    <div>
    </div>
    </form>
</body>
</html>

http://asp-net-by-parijat.blogspot.in/2014/08/aspnet-query-string.html


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class First_Query_String : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
  

    protected void btn_Click(object sender, EventArgs e)
    {
        Response.Redirect("QueryString.aspx?UserMsg=" + TextBox1.Text);
    }
}

Code of Second QueryString.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="SecondQueryString.aspx.cs" Inherits="QueryString" %>

<!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 id="Head1" runat="server">
    <title>QueryString Example in asp.net</title>
    <style type="text/css">
        .style1
        {
            font-size: x-large;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div align="center" class="style1" style="height: 46px" >
        QueryString parameter Values (User Msg)</div>
    <br />
    <div align="center">
        <b></b><asp:Label ID="lblMsg" runat="server" /></div>
    <br />
   
    </form>
</body>
</html>
aspnet-query-string

Query String



using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class QueryString : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            lblMsg.Text = Request.QueryString["UserMsg"];
           
        }
    }
}

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