Passing value between multiple pages in ASP.Net using C# and VB.Net

Hey dorsa,

Instead of using Query String use session, Which will make help to pass parameter to multiple page and will not destroy whe you are going to back.

HTML

CS.aspx

UserName :
<asp:TextBox runat="server" ID="txtUser" />
<br />
<asp:Button Text="Login" runat="server"  OnClick="Login"/>

Home.aspx

<asp:Label ID="lblUser" runat="server" />
<asp:Button Text="Next" runat="server" OnClick="Next" />

Default.aspx

<asp:Button Text="Go to Home" runat="server" OnClick="back" />

Code

C#

CS.aspx.cs

protected void Login(object sender, EventArgs e)
{
    Session["user"] = txtUser.Text;
    Response.Redirect("Home.aspx");
}

Home.aspx.cs

protected void Page_Load(object sender, EventArgs e)
{
    lblUser.Text = Session["user"].ToString();
}
protected void Next(object sender, EventArgs e)
{       
    Response.Redirect("Default.aspx");
}

Default.aspx.cs

protected void back(object sender, EventArgs e)
{
    Response.Redirect("Home.aspx");
}

VB.Net

VB.aspx.cs

Protected Sub Login(ByVal sender As Object, ByVal e As EventArgs)
    Session("user") = txtUser.Text
    Response.Redirect("Home.aspx")
End Sub

Home.aspx.vb

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    lblUser.Text = Session("user").ToString()
End Sub

Protected Sub [Next](ByVal sender As Object, ByVal e As EventArgs)
    Response.Redirect("Default.aspx")
End Sub

Default.aspx.vb

Protected Sub back(ByVal sender As Object, ByVal e As EventArgs)
    Response.Redirect("Home.aspx")
End Sub

Screenshot