Merge two pdf files using itextsharp

using iTextSharp.text;

using iTextSharp.text.pdf;

using System.IO;

using System.Collections;

static void Main(string[] args)

        {

            String[] files = @"file1.pdf,file2.pdf".Split(',');

            MergeFiles(@"file1.pdf", files);

        }

        public static void MergeFiles(string destinationFile, string[] sourceFiles)

        {

            try

            {

                using (MemoryStream ms = new MemoryStream())

                {    

                    PdfCopyFields copy = new PdfCopyFields(ms);  

                    copy.Writer.ViewerPreferences = PdfWriter.PageModeUseOutlines;

                    ArrayList outlines = new ArrayList();

                    int pageOffset = 0;

                    int f = 0;

                   

                    while (f < sourceFiles.Length)

                    {                 

                        string file = sourceFiles[f];

                        PdfReader reader = new PdfReader(file);                     

                        copy.AddDocument(reader);                      

                        pageOffset += reader.NumberOfPages;

                        f++;

                    }                  

                    copy.Close();

                    MemoryStreamToFile(ms, destinationFile);

                }

            }

            catch (System.Exception e)

            {

                System.Console.Error.WriteLine(e.Message);

                System.Console.Error.WriteLine(e.StackTrace);

                System.Console.ReadLine();

            }

        }

        public static void MemoryStreamToFile(MemoryStream MS, string FileName)

        {

            using (FileStream fs = new FileStream(@FileName, FileMode.Create))

            {

                byte[] data = MS.ToArray();

                fs.Write(data, 0, data.Length);

                fs.Close();

            }

  }

Log javascript error into sharepoint ULS

catch (e) {

        logMessageToULS(e.message, 'Custom.js');

}

Error Log File

// Registering the ULS logging function on a global level.

window.onerror = logErrorToULS;

// Set default value for teamName.

var teamName = "Biraj Office App";

// Further add the logErrorToULS method at the end of the script.

function logMessageToULS(message, fileName) {

    if (message != null) {

        var ulsObj = new ulsObject();

        ulsObj.message = message;

        ulsObj.file = fileName;

        ulsObj.line = 0; // We don't know the line, so we set it to zero.

        ulsObj.stack = getCallStack(logMessageToULS.caller);

        //ulsObj.client = getClientInfo();

        ulsObj.team = teamName;

        ulsObj.originalFile = ulsObj.file;

        var soapPacket = generateErrorPacket(ulsObj);

        postMessageToULSSvc(soapPacket);

    }

}

// Function to log messages to Diagnostic web service.

// Invoked by the window.onerror message.

function logErrorToULS(msg, url, linenumber) {

    var ulsObj = new ulsObject();

    ulsObj.message = "Error occurred: " + msg;

    ulsObj.file = url.substring(url.lastIndexOf("/") + 1); // Get the current file name.

    ulsObj.line = linenumber;

    ulsObj.stack = getCallStack(logErrorToULS.caller); // Create error call stack.   

    ulsObj.team = teamName; // Declared in the consumer script.

    ulsObj.originalFile = ulsObj.file;

    var soapPacket = generateErrorPacket(ulsObj); // Create the soap packet.

    postMessageToULSSvc(soapPacket); // Post to the web service.

    return true;

}

// Creates a custom ulslog object

// with the required properties.

function ulsObject() {

    this.message = null;

    this.file = null;

    this.line = null;

    this.client = null;

    this.stack = null;

    this.team = null;

    this.originalFile = null;

}

function getCallStack(functionDef, depth) {

    if (functionDef != null) {

        var signature = '';

        functionDef = functionDef.toString();

        signature = functionDef.substring(0, functionDef.indexOf("{"));

        if (signature.indexOf("function") == 0) {

            signature = signature.substring(8);

        }

        if (depth == 0) {

            var stack = "<stack><function depth='0' signature='{0}'>{1}</function></stack>";

            stack = String.format(stack, signature, functionDef);

        }

        else {

            var stack = "<stack><function depth='1' signature='{0}'></function></stack>";

            stack = String.format(stack, signature);

        }

        return stack;

    }

    return "";

}

// Creates the SOAP packet required by SendClientScriptErrorReport

// web method.

function generateErrorPacket(ulsObj) {

    var soapPacket = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +

                        "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" " +

                                       "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" " +

                                       "xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" +

                          "<soap:Body>" +

                            "<SendClientScriptErrorReport " +

                              "xmlns=\"http://schemas.microsoft.com/sharepoint/diagnostics/\">" +

                              "<message>{0}</message>" +

                              "<file>{1}</file>" +

                              "<line>{2}</line>" +

                              "<stack>{3}</stack>" +

                              "<client>{4}</client>" +

                              "<team>{5}</team>" +

                              "<originalFile>{6}</originalFile>" +

                            "</SendClientScriptErrorReport>" +

                          "</soap:Body>" +

                        "</soap:Envelope>";

    soapPacket = String.format(soapPacket, encodeXmlString(ulsObj.message), encodeXmlString(ulsObj.file),

                 ulsObj.line, encodeXmlString(ulsObj.stack), encodeXmlString(ulsObj.client),

                 encodeXmlString(ulsObj.team), encodeXmlString(ulsObj.originalFile));

    return soapPacket;

}

// Utility function to encode special characters in XML.

function encodeXmlString(txt) {

    txt = String(txt);

    txt = jQuery.trim(txt);

    txt = txt.replace(/&/g, "&amp;");

    txt = txt.replace(/</g, "&lt;");

    txt = txt.replace(/>/g, "&gt;");

    txt = txt.replace(/'/g, "&apos;");

    txt = txt.replace(/"/g, "&quot;");

    return txt;

}

// Function to form the Diagnostics service URL.

function getWebSvcUrl() {

    var serverurl = location.href;

    if (serverurl.indexOf("?") != -1) {

        serverurl = serverurl.replace(location.search, '');

    }

    var index = serverurl.lastIndexOf("/");

    serverurl = serverurl.substring(0, index - 1);

    serverurl = serverurl.concat('/_vti_bin/diagnostics.asmx');

    return serverurl;

}

// Method to post the SOAP packet to the Diagnostic web service.

function postMessageToULSSvc(soapPacket) {

    $(document).ready(function () {

        $.ajax({

            url: getWebSvcUrl(),

            type: "POST",

            dataType: "xml",

            data: soapPacket, //soap packet.

            contentType: "text/xml; charset=\"utf-8\"",

            success: handleResponse, // Invoke when the web service call is successful.

            error: handleError// Invoke when the web service call fails.

        });

    });

}

// Invoked when the web service call succeeds.

function handleResponse(data, textStatus, jqXHR) {

    // Custom code...

    $('#message').html('Something went wrong. Please try after sometime!');

}

// Invoked when the web service call fails.

function handleError(jqXHR, textStatus, errorThrown) {

    //Custom code...

    $('#message').html('Error occurred in executing the web request');

}

Sharepoint updated created by and modified by forcefully

item["Author"] = new SPFieldUserValue(web, SPContext.Current.Web.CurrentUser.ID, SPContext.Current.Web.CurrentUser.LoginName);

                        item["Editor"] = new SPFieldUserValue(web, SPContext.Current.Web.CurrentUser.ID, SPContext.Current.Web.CurrentUser.LoginName);

                        item.Update();