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Query String in web forms asp.net c#

Introduction

Query String in web forms asp.net is very important if you have a shopping products. Through this  article we will show you how to use Query String in web forms asp.net also you can say i will provide you an example of it.  If we want to pass control or variable value from one form to another form then we can use QueryString . There are many options available to pass queryString , these are.

In Hyperlink:

    <a href=”~/Default.aspx?id=10&name=Jacob”>QueryString Example</a>

In Response.Redirect method :

 Response.Redirect(“~/Default.aspx?id=10&name=Jacob”);

If we want to get queryString Parameter valuefrom url then we should use Request.QueryString  Object.
Label1.Text=Request.QueryString[“querystring parameter”].ToString();

Lets take an simple example to pass textbox value from one form to another form using QueryString.




<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Redirect("~/Default2.aspx?name=" + TextBox1.Text);
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.Request.QueryString["name"] != null)
        {
            Label1.Text = "name of the querystring parameter is " + Page.Request.QueryString["name"];
        }
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        Enter Name :
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
        <asp:Button ID="Button1" runat="server" Text="QueryString" OnClick="Button1_Click" /><br />
        <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
    </div>
    </form>
</body>

</html>
Output
Eample of QueryString in ASP.NET

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