Save PDF file with different Name and Date in ASP.Net using C# and VB.Net

Hi gkoutsiv,

Please refer below sample.

HTML

<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<br />
<asp:Button Text="Save" ID="btnSave" runat="server" OnClick="SavePDF" />
<hr />
<div id="pdf_container">
</div>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.6.347/pdf.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.6.347/pdf_viewer.min.css"
    rel="stylesheet" type="text/css" />
<script type="text/javascript">
    var pdfjsLib = window['pdfjs-dist/build/pdf'];
    pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.6.347/pdf.worker.min.js';
    var pdfDoc = null;
    var scale = 1; //Set Scale for zooming PDF.
    var resolution = 2; //Set Resolution to Adjust PDF clarity.
    LoadPdfFromUrl('PDFs/Sample.pdf');
    function LoadPdfFromUrl(url) {

        //Read PDF from URL.
        pdfjsLib.getDocument(url).promise.then(function (pdfDoc_) {
            pdfDoc = pdfDoc_;

            //Reference the Container DIV.
            var pdf_container = document.getElementById("pdf_container");
            pdf_container.style.display = "block";

            //Loop and render all pages.
            for (var i = 1; i <= pdfDoc.numPages; i++) {
                RenderPage(pdf_container, i);
            }
        });
    };
    function RenderPage(pdf_container, num) {
        pdfDoc.getPage(num).then(function (page) {
            //Create Canvas element and append to the Container DIV.
            var canvas = document.createElement('canvas');
            canvas.id = 'pdf-' + num;
            ctx = canvas.getContext('2d');
            pdf_container.appendChild(canvas);

            //Create and add empty DIV to add SPACE between pages.
            var spacer = document.createElement("div");
            spacer.style.height = "20px";
            pdf_container.appendChild(spacer);

            //Set the Canvas dimensions using ViewPort and Scale.
            var viewport = page.getViewport({ scale: scale });
            canvas.height = resolution * viewport.height;
            canvas.width = resolution * viewport.width;

            //Render the PDF page.
            var renderContext = {
                canvasContext: ctx,
                viewport: viewport,
                transform: [resolution, 0, 0, resolution, 0, 0]
            };

            page.render(renderContext);
        });
    };
</script>

Namespace

C#

using System.IO;

VB.Net

Imports System.IO

Code

C#

protected void SavePDF(object sender, EventArgs e)
{
    string filePath = Server.MapPath("~/PDFs/sample.pdf");
    string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(filePath);
    string fileNew = string.Format("{0}{1}.pdf", this.txtName.Text, DateTime.Now.ToString("MM_dd_yyyy"));
    File.WriteAllBytes(Path.Combine(Server.MapPath("~/PDFs/"), fileNew), File.ReadAllBytes(filePath));
    ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('PDF File saved.')", true);
}

VB.Net

Protected Sub SavePDF(ByVal sender As Object, ByVal e As EventArgs)
    Dim filePath As String = Server.MapPath("~/PDFs/sample.pdf")
    Dim fileNameWithoutExtension As String = Path.GetFileNameWithoutExtension(filePath)
    Dim fileNew As String = String.Format("{0}{1}.pdf", Me.txtName.Text, DateTime.Now.ToString("MM_dd_yyyy"))
    File.WriteAllBytes(Path.Combine(Server.MapPath("~/PDFs/"), fileNew), File.ReadAllBytes(filePath))
    ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert('PDF File saved.')", True)
End Sub

Screenshot