how to pass value from one page another page in asp.net

We can use the following technique.

*********Client Side*********

Cookies

Page 1 (Set)

            HttpCookie httpCookie = new HttpCookie("HelloWorld");

            httpCookie["SayHello"] = "Hello World";

            httpCookie.Expires = DateTime.Now.AddMinutes(60);

            Response.Cookies.Add(httpCookie);

Page 2 (Get)

            if (Request.Cookies["HelloWorld"] != null)

            {

                HttpCookie httpCookie = Request.Cookies["HelloWorld"];

                Response.Write(httpCookie["SayHello"].ToString());

            }

Query String

Page 1 (Set)

            Response.Redirect("~/Page_2.aspx?SayHello=Hello World");

Page 2 (Get)

            if (Request.QueryString["SayHello"] != null)

            {

                Response.Write(Request.QueryString["SayHello"].ToString());

            }

Hidden Field

Page 1 (Set)

            TextBox1.Text = "Hello World";

            HiddenField1.Value = "Hello World";

Page 2 (Get)

            if (Page.PreviousPage != null)

            {

                TextBox textBox = (TextBox)Page.PreviousPage.FindControl("TextBox1");

                if (textBox != null)

                {

                    Response.Write(textBox.Text);

                }

                HiddenField hiddenField = HiddenField)Page.PreviousPage.FindControl("HiddenField1");

                if (hiddenField != null)

                {

                    Response.Write(hiddenField.Value);

                }

            }

Note:-

You can get the Previous Page control only if Previous Page redirected using the following technique

            Server.Transfer("~/Page_2.aspx", true);

            Server.Execute("~/Page_2.aspx", true);

            PostBackUrl="~/Page_2.aspx" Property

Cache

Page 1 (Set)

      Cache["SayHello"] = "Hello World";

Page 2 (Get)

            if (Cache["SayHello"] != null)

            {

                Response.Write(Cache["SayHello"].ToString());

            }

*********Server Side*********

Session

Page 1 (Set)

      Session["SayHello"] = "Hello World";

Page 2 (Get)

            if (Session["SayHello"] != null)

            {

                Response.Write(Cache["SayHello"].ToString());

            }

Application

Page 1 (Set)

      Application["SayHello"] = "Hello World";

Page 2 (Get)

            if (Application["SayHello"] != null)

            {

                Response.Write(Cache["SayHello"].ToString());

            }

*********Other Ways*********

Public Properties

Page 1 (Set)

            public string SayHello

            {

                get

                {

                  return "Hello World";

                }

            }

Page 2 (Get)

Add in page directive

<%@ PreviousPageType VirtualPath="~/Page_1.aspx" %>

           if (Page.PreviousPage != null)

           {

              Response.Write(PreviousPage.SayHello); 

     }

Note:-

You can get the Previous Page control only if Previous Page redirected using the following technique

            Server.Transfer("~/Page_2.aspx", true);

            Server.Execute("~/Page_2.aspx", true);

            PostBackUrl="~/Page_2.aspx" Property

HttpContext

Page 1 (Set)

     HttpContext.Current.Items["SayHello"] = "Hello World";

Page 2 (Get)

           if (Page.PreviousPage != null)

           {

         Response.Write((String)HttpContext.Current.Items["SayHello"]);

     }

     

Note:-

You can get the Previous Page control only if Previous Page redirected using the following technique

           Server.Transfer("~/Page_2.aspx", true);

           Server.Execute("~/Page_2.aspx", true);

           PostBackUrl="~/Page_2.aspx" Property

Page Object

Page 1 (Set)

     TextBox1.Text = "Hello World";

           HiddenField1.Value = "Hello World";

Page 2 (Get)

           if (Page.PreviousPage != null)

           {

                Page_1 sourcePage;

                sourcePage = (Page_1)PreviousPage;

                TextBox textBox = (TextBox)sourcePage.FindControl("TextBox1");

                HiddenField hiddenField = (HiddenField)sourcePage.FindControl("HiddenField1");

                if (textBox != null)

                {

                    Response.Write(textBox.Text);

                }

                if (hiddenField != null)

                {

                    Response.Write(hiddenField.Value);

                }           

     }

Note:-

You can get the Previous Page control only if Previous Page redirected using the following technique

           Server.Transfer("~/Page_2.aspx", true);

           Server.Execute("~/Page_2.aspx", true);

           PostBackUrl="~/Page_2.aspx" Property