how to redirect from one page to another on button click from dialog box using asp.net

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ASP.NET

I write one application in which onbuttonclick dialog box is displayed.

This dialog box contains text box & button.
Now I want to redirect to another page with value from text box on button click.

For the redirect I write following code

protected void btnDisplay_Click(object sender, EventArgs e)
    {
        string strName;
        string strCountry;
        strName=txtName.Text;
        strCountry = ddlName.Text;
        Response.Redirect("Next.aspx?name=" + strName + "&country=" + strCountry);
    }

But when I click on the button I cannot go to next page.

What am I to do?

Thanks.