In this article I will explain with an example, how to pass (send) value from one Page to another using QueryString in ASP.Net with C# and VB.Net.
This article will also illustrate how to read values from QueryString sent from a Page and display in ASP.Net with C# and VB.Net.
 
 

HTML Markup

The following HTML Markup consists of:
TextBox – For capturing user input.
DropDownList - For selecting values.
Button – For send selected values as QueryString parameter.
The Button has been assigned with OnClick event handler.
Name:
<asp:TextBox ID="txtName" runat="server" Text="Mudassar Khan" />
<br />
<br />
Technology:
<asp:DropDownList ID="ddlTechnology" runat="server">
    <asp:ListItem Text="ASP.Net" Value="ASP.Net" />
    <asp:ListItem Text="PHP" Value="PHP" />
    <asp:ListItem Text="JSP" Value="JSP" />
</asp:DropDownList>
<asp:Button ID="btnSend" Text="Send" runat="server" OnClick="Send" />
 
 

Passing (sending) values from one Page to another using QueryString in ASP.Net

When the Send Button is clicked, the Name and Technology values are fetched from the TextBox and DropDownList controls and are set in the URL as QueryString parameters and the Page is redirected.
C#
protected void Send(object sender, EventArgs e)
{
    string name = txtName.Text;
    string technology = ddlTechnology.SelectedItem.Value;
    Response.Redirect(string.Format("~/Page2_CS.aspx?name={0}&technology={1}", name, technology));
}
 
VB.Net
Protected Sub Send(sender As Object, e As System.EventArgs)
    Dim name As String = txtName.Text
    Dim technology As String = ddlTechnology.SelectedItem.Value
    Response.Redirect(String.Format("~/Page2_VB.aspx?name={0}&technology={1}", name, technology))
End Sub
 
 

HTML Markup

The following HTML Markup consists of:

Label – For capturing TextBox value and DropDownList and showing to user.
<asp:Label ID="lblData" runat="server" />
 
 

Reading values sent using QueryString and displaying in ASP.Net

Inside the Page Load event, the Name and Technology values are fetched from the QueryString and displayed in Label control.
C#
protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        string name = Request.QueryString["name"];
        string technology = Request.QueryString["technology"];
        string data = "<u>Values from QueryString</u><br /><br />";
        data += "<b>Name:</b> " + name + " Technology: " + technology;
        lblData.Text = data;
    }
}
 
VB.Net
Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim name As String = Request.QueryString("name")
        Dim technology As String = Request.QueryString("technology")
        Dim data As String = "<u>Values from QueryString</u><br /><br />"
        data &= "Name: " & name &" <b>Technology:</b> " & technology
        lblData.Text = data
    End If
End Sub
 
 

Screenshot

Pass (Send) value from one Page to another using QueryString in ASP.Net with C# and VB.Net
 
 

Demo

View Demo
 
 

Downloads

Download Code