Server-side Programming Overview
You can configure the settings of RadPdfViewer and create its elements in the code-behind via the Server-Side API of the control.
RadPdfViewer Public Properties and Methods
For a list with the server-side properties and methods of the control, see the Server-Side API of the RadPdfViewer class. You can also find it in the intellisense in Visual Studio.
Get File Name and Selected Page Number
RadPdfViewer exposes infromation regarding the loaded File name and currently SelectedPage, which can be accessed on the server-side like demonstrated in the following sample.
Example 1: Get the name and the current page of the documentloaded in RadPdfViewer
<telerik:RadAjaxPanel runat="server">
<asp:Button ID="Button1" runat="server" Text="Get File Name" OnClick="Button1_Click" />
<asp:Label ID="Label1" runat="server"></asp:Label>
<telerik:RadPdfViewer runat="server" ID="RadPdfViewer1" Height="450px" Width="1000px"
Skin="Default" RenderMode="Lightweight">
<PdfjsProcessingSettings File="Document1.pdf">
</PdfjsProcessingSettings>
</telerik:RadPdfViewer>
</telerik:RadAjaxPanel>
protected void Button1_Click(object sender, EventArgs e)
{
var fileName = RadPdfViewer1.PdfjsProcessingSettings.File;
var currentPage = RadPdfViewer1.ActivePage;
string result = string.Format("Opened file with name: <strong>{0}</strong> on page: <strong>{1}</strong><br />", fileName, currentPage);
Label1.Text = result;
}
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim fileName = RadPdfViewer1.PdfjsProcessingSettings.File
Dim currentPage = RadPdfViewer1.ActivePage
Dim result As String = String.Format("Opened file with name: <strong>{0}</strong> on page: <strong>{1}</strong><br />", fileName, currentPage)
Label1.Text = result
End Sub
Creating a PdfViewer in the Code-Behind
RadPdfViewer can be created and configured entirely in the code-behind, as demonstrated in the sample below:
<head runat="server">
<title></title>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.2.2/pdf.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.2.2/pdf.worker.js"></script>
<script type="text/javascript">
window.pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.2.2/pdf.worker.js';
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:Panel ID="Panel1" runat="server"></asp:Panel>
</form>
protected void Page_Init(object sender, EventArgs e)
{
GeneratePdfViewer();
}
private void GeneratePdfViewer()
{
var pdfViewer = new RadPdfViewer();
pdfViewer.ID = "RadPdfViewer1";
pdfViewer.Height = Unit.Pixel(550);
pdfViewer.Width = Unit.Pixel(800);
pdfViewer.Scale = new Telerik.Web.UI.PdfViewer.Scale(0.9);
pdfViewer.ToolBar = true;
pdfViewer.ToolBarSettings.Items = new string[] { "pager", "spacer", "zoom", "toggleSelection", "spacer", "search", "download", "print" };
pdfViewer.PdfjsProcessingSettings.File = "Document.pdf";
Panel1.Controls.Add(pdfViewer);
}
Protected Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Init
GeneratePdfViewer()
End Sub
Private Sub GeneratePdfViewer()
Dim pdfViewer = New RadPdfViewer()
pdfViewer.ID = "RadPdfViewer1"
pdfViewer.Height = Unit.Pixel(550)
pdfViewer.Width = Unit.Pixel(800)
pdfViewer.Scale = New PdfViewer.Scale(0.9)
pdfViewer.ToolBar = True
pdfViewer.ToolBarSettings.Items = New String() {"pager", "spacer", "zoom", "toggleSelection", "spacer", "search", "download", "print"}
pdfViewer.PdfjsProcessingSettings.File = "sample.pdf"
Panel1.Controls.Add(pdfViewer)
End Sub