You can use 'embed' tag
Follow these steps-
step1: take one Div with runat="Server" attribute
step 2; Set visible false for Div
Step3: Put onr embed tag with setting all details
step 4: Take one LinkButton
Like this-
<div id="div1" runat="server" style="display:none">
<embed id="showPdf" runat="server" src="location" type="application/pdf" width="1279" height="630"></embed>
</div>
<asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click">LinkButton</asp:LinkButton>
Step 5 :
Write this code-
protected void LinkButton1_Click(object sender, EventArgs e)
{
din1.Visible=True;
}
Try and let me know.