How to pass value from one page to another page in ASP.NET

There are various techniques to pass values from one page to another page . These are Session, ViewState, QueryString, findControl , etc
Here we use one by one for passing values from one page to another page.

Use Session: 

Syntax : 
Session["Session variable"] = variable;
variable = Session["Session variable"].Tostring();

Note : Session value store in all page of browser.

Use QueryString 

Syntax : Basically query string pass in URL
http://dotprogramming.blogspot.com/default.aspx?id=7    // here id=7 define query string data

lets take an simple example
Step-1 : Take two Web forms (first.aspx and second.aspx)
Step-2 : first page contain one textbox , one button and one hyperlink control

<%@ 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)
    {
        Session["username"] = TextBox1.Text;
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    Enter Session data :
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
        <asp:Button ID="Button1" runat="server" Text="Store Session"
            onclick="Button1_Click" />
        <br />
        <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl ="~/second.aspx?id=7" >QueryString</asp:HyperLink>
        <br />
    </div>
    </form>
</body>
</html>

Step-3 : Second page contains two label control.

<%@ 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 Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "Session data " + Session["username"].ToString();
        Label2.Text = "query string data" + Page.Request.QueryString["id"].ToString();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="Label1" runat="server" Text=""></asp:Label><br />
        <asp:Label ID="Label2" runat="server" Text=""></asp:Label>

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


Output
How to pass value from one page to another page in ASP.NET

How to pass value from one page to another page in ASP.NET

How to pass value from one page to another page in ASP.NET How to pass value from one page to another page in ASP.NET Reviewed by Jacob Lefore on September 22, 2013 Rating: 5

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