enter image description here
<!DOCTYPE html>
<html>
<body>
<h1>HTML DOM Events</h1>
<h2>The onclick Event</h2>
<button onclick="myFunction()">Confirm</button>
<script>
function myFunction() {
var message = "You have selected:";
message += "Stmt1 \r\n stmt2 \r\n stmt2";
message += "\r\n";
message += "stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2\n";
message += "stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2stmt2";
status = confirm(message);
}
</script>
</body>
</html>
Here after 3rd line of the message , it is hidden.Also window size is not increasing to contain full text. Same is working fine with IE.
using System.Windows;
namespace CefSharp.Wpf.Example.Handlers
{
public class JsDialogHandler : CefSharp.Handler.JsDialogHandler
{
protected override bool OnJSDialog(IWebBrowser chromiumWebBrowser, IBrowser browser, string originUrl, CefJsDialogType dialogType, string messageText, string defaultPromptText, IJsDialogCallback callback, ref bool suppressMessage)
{
var b = (ChromiumWebBrowser)chromiumWebBrowser;
b.Dispatcher.InvokeAsync(() =>
{
if (dialogType == CefJsDialogType.Confirm)
{
var messageBoxResult = MessageBox.Show(messageText, $"A page at {originUrl} says:", MessageBoxButton.YesNo);
callback.Continue(messageBoxResult == MessageBoxResult.Yes);
}
else if(dialogType == CefJsDialogType.Alert)
{
var messageBoxResult = MessageBox.Show(messageText, $"A page at {originUrl} says:", MessageBoxButton.OK);
callback.Continue(messageBoxResult == MessageBoxResult.OK);
}
else if (dialogType == CefJsDialogType.Prompt)
{
var messageBoxResult = PromptDialog.Prompt(messageText, $"A page at {originUrl} says:", defaultPromptText);
callback.Continue(messageBoxResult.Item1, userInput: messageBoxResult.Item2);
}
});
return true;
}
}
}
//Assign your handler to the ChromiumWebBrowser instance
browser.JsDialogHandler = new CefSharp.Wpf.Example.Handlers.JsDialogHandler();
Full example added in commit https://github.com/cefsharp/CefSharp/commit/df8a6086a6bbb79280916c955015a1b58a421ddc
Related
I'm trying to create some html elements as a reponse to a button click in my visualforce page, and i am using javascript remoting, but no matter what i do the page keeps refreshing after the button click.
my visualforce page:
<apex:page Controller="BpmIcountPayment">
<head>
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.css"/>
</head>
<body>
<script>
function addProductRow(e) {
e.preventDefault();
var productId = $('select[id$=productsLov]').val();
Visualforce.remoting.Manager.invokeAction(
'{!$RemoteAction.BpmIcountPayment.getProductRowData}',
productId,
function(result, event) {
if (event.status) {
productRowHtml = '<div id="p-' + result.Id + '">';
productRowHtml += '<span>' + result.Description + '<span>';
productRowHtml += '<button class="plusButton">+</button><input type="number">1</input><button class="minusButton">-</button>';
if (result.Name == 'discount') {
productRowHtml += '<input classtype="number"></input><span>₪</span>';
};
productRowHtml += '<span>' + result.Price + '₪</span>';
$('div[id$=productRows]').append(productRowHtml);
} else if (event.type === 'exception') {
console.log(event.message + ' ' + event.where);
} else {
console.log('else ' + event.message);
}
}, {escape: true});
}
</script>
</body>
<apex:form >
<div>
<apex:selectList id="productsLov" value="{!productsTitle}" multiselect="false" size="1">
<apex:selectOptions value="{!ProductsLov}"></apex:selectOptions>
</apex:selectList>
<button id="addProductButton" onclick="addProductRow()" reRender="false">add product</button>
</div>
<div id="productsRows">
</div>
</apex:form>
</apex:page>
I even managed to print the result into the console, but it does so after refreshing the page.
my controller:
public class BpmIcountPayment{
private final Account account;
public String productsTitle {
get { return 'products'; }
set;
}
public List<Product2> productsList {
get { return productsList; }
set { productsList = value; }
}
public BpmIcountPayment() {
account = [SELECT Id, Name, Site FROM Account
WHERE Id = :ApexPages.currentPage().getParameters().get('id')];
}
public Account getAccount() {
return account;
}
#RemoteAction
public static Product2 getProductRowData(string productId) {
Product2 product = [SELECT Id, Name, Family, Price__c, Description
FROM Product2
WHERE Id = :productId];
return product;
}
public List<SelectOption> getProductsLov() {
List<SelectOption> products = new List<SelectOption>();
productsList = [SELECT Id, Name, Family, Price__c, Description
FROM Product2
WHERE (Family = 'ShopProduct')
OR (Family = 'CourseParent')
OR (Family = 'SFCourseProgram')];
for (Product2 currProduct : productsList) {
products.add(new SelectOption(currProduct.Id, currProduct.Name));
}
return products;
}}
I found the issue! It was just a case of defining the button type as "button" because the default was "submit" and that caused the page to re-render
<cc1:AjaxFileUpload ID="AjaxFileUpload1" AllowedFileTypes="jpg,jpeg"
runat="server" MaximumNumberOfFiles="4" OnUploadComplete="AjaxFileUpload1_UploadComplete"
/>
Code behind file
protected void AjaxFileUpload1_UploadComplete(object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e)
{
if (e.FileSize > 10)
{
string filePath = e.FileName;
AjaxFileUpload1.SaveAs(Server.MapPath(filePath));
}
else
{
}
}
I want to check that all the files size should not exceed a particular value before the files upload event.
Try this way:
Server side:
protected void AjaxFileUpload1_UploadComplete(object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e)
{
try
{
string savePath = MapPath("~/Images/" + e.FileName);
// dont save file & return if condition not matched.
if (e.FileSize > 72000) // use same condition in client side code
{
return;
}
AjaxFileUpload1.SaveAs(savePath);
}
catch (Exception ex)
{
throw ex;
}
}
and on client side:
<script type="text/javascript">
function UploadComplete(sender, args) {
var filesize = args.get_fileSize();
var fileId = args.get_fileId();
var status = document.getElementById('AjaxFileUpload1_FileItemStatus_' + fileId);
var container = document.getElementById('AjaxFileUpload1_FileInfoContainer_' + fileId);
if (filesize > 72000) { // same condition used for server side
document.getElementById('lblStatus').innerText = "error";
if (status.innerText) {
status.innerText = " (Error)";
}
if (status.textContent) {
status.textContent = " (Error)";
}
container.style.color = 'Red';
}
}
</script>
<cc1:AjaxFileUpload ID="AjaxFileUpload1" AllowedFileTypes="jpg,jpeg" runat="server" MaximumNumberOfFiles="4" OnUploadComplete="AjaxFileUpload1_UploadComplete" OnClientUploadComplete="UploadComplete" />
Hope this helps!!
<script type="text/javascript">
$(".ajax__fileupload_dropzone").bind("drop", function () {
checkfilesize();
});
$(".ajax__fileupload_queueContainer").bind("click", function () {
checkfilesize();
});
$(".ajax__fileupload_uploadbutton").bind("mouseenter", function () {
checkfilesize();
});
function checkfilesize() {
var total_filesize_num = 0;
var myElements = $(".filesize");
if (myElements.length == 0) {
$(".ajax__fileupload_uploadbutton").css("visibility", "hidden");
return;
}
for (var i = 0; i < myElements.length; i++) {
var filesize = myElements.eq(i).html(); //$(".filesize").html();
total_filesize_num = total_filesize_num + filesize_tonum(filesize);
}
if (total_filesize_num > 5) {
$(".ajax__fileupload_uploadbutton").css("visibility", "hidden");
alert('Maximum file size is 5MB only! Please select another one.');
return;
} else {
$(".ajax__fileupload_uploadbutton").css("visibility", "visible");
}
}
function countsumfilesize() {
var sumfilesize = 0;
var myElements = $(".filesize");
for (var i = 0; i < myElements.length; i++) {
alert(myElements.eq(i).html());
}
}
function filesize_tonum(filesize) {
var filesize_num = 0;
if (filesize.indexOf("kb") > 0) {
var space = filesize.lastIndexOf(" ");
filesize_num = parseFloat("0." + filesize.substr(0, filesize.length - space + 1));
}
else if (filesize.indexOf("MB") > 0) {
var space = filesize.lastIndexOf(" ");
filesize_num = parseFloat(filesize.substr(0, filesize.length - space + 1));
}
return filesize_num;
}
</script>
<ajaxToolkit:AjaxFileUpload ID="AjaxFileUploadImage" runat="server" OnClientUploadComplete="uploadComplete" MaximumNumberOfFiles="1" AllowedFileTypes="gif,png,jpg,jpeg" onchange="checkfilesize(); return false;" />
See the code below:
public void afuUpload_UploadedComplete(object sender, AsyncFileUploadEventArgs e)
{
try
{
string savePath = MapPath("~/Uploads/" + Path.GetFileName(e.filename));
if (int.Parse(e.filesize) > 3000000)
{
return;
}
afuUpload.SaveAs(savePath);
}
catch (Exception ex)
{
throw ex;
}}
The idea is to prevent the file is uploaded to the server. In the proposed solution, when the flow code has reached afuUpload_UploadedComplete, the file was uploaded to server, but has not yet been recorded in the path you specify. For example, if the limit is 20 megabytes and the selected file is 22 megabytes, when the code reaches afuUpload_UploadedComplete, 22 Megabytes already been uploaded to the server.
The solution sought is that the validation is done on the client side (JavaScript) and that prevents the code arrives to CodeBehind on the server.
In my case, I tried to OnClientUploadComplete generating an exception when the file size limit is exceeded, but it did not work and the code is still reaching the CodeBehind. The other problem is that when the exception occurs, the JavaScript function OnClientUploadError is not firing to intercept the exception generated in OnClientUploadComplete function.
Controller
[HttpPost]
public ActionResult Create(string Album, Photo photo, IEnumerable<HttpPostedFileBase> files, DateTime? datec, string NewAlbum = null)
{
.....
foreach (var file in files)
{
decimal sum = file.ContentLength / 1048;
if (sum > 4000)
{
errorlist2 += "Sorry " + file.FileName + " has exceeded its file limit off 4 MB <br/>";
}
}
if (errorlist2 != "")
{
ViewBag.Error = errorlist2;
return View(photo);
}
// we dont want put the message in the loop it will come out on first max limit , rather find all files in excess, then we can pass the message
//also make sure your web config is set for a limit on max size
//using the normal html multi uploaded
// <input type="file" name="files" id="files" required multiple="multiple" accept=".jpg, .png, .gif" size="4" />
I am trying to create an iOS app using PhoneGap that will allow a user to upload photos to a web server. Here is my code.
<!DOCTYPE html>
<html>
<head>
<title>Capture Photo</title>
<script type="text/javascript" charset="utf-8" src="cordova-1.9.0.js"></script>
<script type="text/javascript" charset="utf-8">
// Wait for PhoneGap to load
document.addEventListener("deviceready", onDeviceReady, false);
// PhoneGap is ready
function onDeviceReady() {
// Do cool things here...
}
function getImage() {
// Retrieve image file location from specified source
navigator.camera.getPicture(uploadPhoto, function(message) {
alert('get picture failed');
},{
quality: 50,
destinationType: navigator.camera.DestinationType.FILE_URI,
sourceType: navigator.camera.PictureSourceType.PHOTOLIBRARY
}
);
}
function uploadPhoto(imageURI) {
var options = new FileUploadOptions();
options.fileKey="recFile";
options.fileName=imageURI.substr(imageURI.lastIndexOf('/')+1);
options.mimeType="image/jpeg";
var params = new Object();
params.value1 = "test";
params.value2 = "param";
options.params = params;
var ft = new FileTransfer();
ft.upload(imageURI, "http://someWebSite.com/Testing/SaveImage.asmx/SaveImage", win, fail, options, true);
}
function win(r) {
console.log("Code = " + r.responseCode);
console.log("Response = " + r.response);
console.log("Sent = " + r.bytesSent);
}
function fail(error) {
alert("An error has occurred: Code = " + error.code);
alert("source = " + error.source);
alert("http_status = " + error.http_status);
console.log("upload error source " + error.source);
console.log("upload error target " + error.target);
}
</script>
</head>
<body>
<button onclick="getImage();">Upload a Photo</button>
</body>
Is anything wrong with my index.html file, or is the problem with the ASMX file?
Whenever I try to test this out on a 4th generation iPod Touch, I get the following error message:
2012-07-09 16:24:03.257 Test1[916:707] File Transfer Finished with response code 404
2012-07-09 16:24:03.260 Test1[916:707] FileTransferError {
code = 3;
"http_status" = 404;
source = "http://someWebSite.com/Testing/SaveImage.asmx/SaveImage";
target = "file://localhost/var/mobile/Applications/5DD01E68-02F7-410B-996A- 2D70BF1A61D3/tmp/cdv_photo_046.jpg";}
2012-07-09 16:24:07.137 Test1[916:707] ERROR: Plugin 'Debug Console' not found, or is not a CDVPlugin. Check your plugin mapping in Cordova.plist.
You can follow this example Upload image from android phonegap to a server using asmx
Or
A simple example
the js
<!DOCTYPE HTML>
<html>
<head>
<title>Cordova</title>
<link rel="stylesheet" href="style.css" media="screen" />
<script type="text/javascript" charset="utf-8" src="cordova-2.0.0.js"></script>
<script type="text/javascript" charset="utf-8" src="jquery-1.7.2.min.js"></script>
<script type="text/javascript" charset="utf-8">
var pictureSource; // picture source
var destinationType; // sets the format of returned value
document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
pictureSource = navigator.camera.PictureSourceType;
destinationType = navigator.camera.DestinationType;
}
</script>
</head>
<body>
<script type="text/javascript" charset="utf-8">
var myData = "";
$(document).ready(function() {
$("#getDataFromServer").click(function() {
var imageData = myData;
$.ajax({
type : "POST",
url : 'http://my.domain.name/saveImage.ashx',
data : {
image : imageData
},
beforeSend : function() {
$("#comment2").text("Start ajax " + imageData.length);
},
success : function(data) {
$("#comment2").text("Uploaded! " + data);
},
error : function(request, error) {
$("#comment2").text("Error! " + error);
}
});
});
})
function capturePhotoEdit(source) {
navigator.camera.getPicture(onPhotoDataSuccess, onFail, {
quality : 50,
destinationType : destinationType.DATA_URL,
sourceType : source
});
}
function onFail(message) {
alert('Failed because: ' + message);
}
function onPhotoDataSuccess(imageData) {
console.log(imageData);
var smallImage = document.getElementById('smallImage');
smallImage.style.display = 'block';
smallImage.src = "data:image/jpeg;base64," + imageData;
myData = imageData;
$("#comment").text(imageData.length);
}
</script>
<h1>Hello World</h1>
<p>
<a href="#" onclick="capturePhotoEdit(pictureSource.PHOTOLIBRARY);">get
image</a>
</p>
<p>
send image
</p>
<span id="comment2"></span>
<img style="display: none; width: 100px; height: 100px;"
id="smallImage" src="" />
<span id="imagename"></span>
<span id="comment"></span>
the asp.net handler saveImage.ashx
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Text;
namespace Recepies
{
/// <summary>
/// Summary description for saveImage
/// </summary>
public class saveImage : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
try
{
string filePath = "";
filePath = context.Server.MapPath(".");
string fileName = RandomString(10);
string myImage = context.Request.Form["image"];
if (myImage.Length > 0)
{
File.WriteAllBytes(filePath + "/upload/" + fileName + ".jpg", Convert.FromBase64String(myImage));
context.Response.ContentType = "text/plain";
context.Response.Write("File was saved - " + fileName + ".jpg");
}
else
{
context.Response.ContentType = "text/plain";
context.Response.Write("File was not saved");
}
}
catch (Exception ex)
{
context.Response.ContentType = "text/plain";
context.Response.Write(ex.Message);
}
}
private static Random random = new Random((int)DateTime.Now.Ticks);//thanks to McAden
private string RandomString(int size)
{
StringBuilder builder = new StringBuilder();
char ch;
for (int i = 0; i < size; i++)
{
ch = Convert.ToChar(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));
builder.Append(ch);
}
return builder.ToString();
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
I've been having the same issue (on iOS7). The solution that worked for me was to add the "saveToPhotoAlbum" parameter.
navigator.camera.getPicture(success, fail, {
quality: 80,
destinationType: Camera.DestinationType.FILE_URI,
sourceType: Camera.PictureSourceType.CAMERA,
saveToPhotoAlbum: true
});
I've been using my own Error reporting module which was combination of simple c# and jQueryUI Dialog. Problem is that once error or success occurs i do write it's value to session. It does work pretty good on pages with Responce.Redirect on error but not on pages where i catch an error and then return to same form.
My question is why does session which added pre-postback fails to load in pages where i have return statement on some condition.
And if there another way to save errors and success message except in session ? Maybe global variables or something like that ...
CODE EXAMPLES
this is Error class
public static string getMessage()
{
HttpContext c = HttpContext.Current;
string messageType = "";
if (c.Session["errorMessage"] != null)
{
messageType = "errorMessage";
}
else if (c.Session["successMessage"] != null)
{
messageType = "successMessage";
}
if (!string.IsNullOrEmpty(messageType))
{
string[] messageBody = c.Session[messageType].ToString().Split('|');
StringBuilder userMessageSb = new StringBuilder();
userMessageSb.Append(string.Format("<div id=\"{0}\" title=\"{1}\">{2}</div>", messageType, messageBody[0], messageBody[1]));
// fix so message will not re-appear
c.Session.Remove(messageType);
messageType = userMessageSb.ToString();
}
return messageType;
}
public static void setSuccess(string successMessage)
{
HttpContext.Current.Session["successMessage"] = setMessage("success", successMessage);
}
public static void setError(string errorMessage)
{
HttpContext.Current.Session["errorMessage"] = setMessage("error", errorMessage);
}
private static string setMessage(string messageTitle, string messageBody)
{
return string.Format("{0}|{1}", messageTitle, messageBody);
}
i set message like this prior to redirect or return
Errors.setError(my error is");
i get error on bottom of my masterpage like this
<%= Errors.getMessage() %>
and this is JS
$(function () {
$("#errorMessage").dialog("destroy");
$("#successMessage").dialog("destroy");
if ($("#errorMessage").length != 0) {
$("#errorMessage").dialog({
modal: true,
height: 300,
width: 400,
buttons: {
Ok: function () {
$(this).dialog('close');
}
}
});
}
if ($("#successMessage").length != 0) {
$("#successMessage").dialog({
modal: true,
height: 300,
width: 400,
buttons: {
Ok: function () {
$(this).dialog('close');
}
}
});
}
});
There is a possibility that <%= Errors.getMessage() %> executes before you call Errors.setError(my error is") in case when you are not redirecting.
Hope below answer helps.
Create a property in your master page code behind
public string MessagePlaceholder
{
get { return messagePlaceholder.InnerHtml; }
set { messagePlaceholder.InnerHtml = value; }
}
Replace <%= Errors.getMessage() %> with a div place holder like below
<div id="messagePlaceholder" runat="server"></div>
And here is your setError method
public static void setError(string errorMessage, bool redirecting)
{
HttpContext.Current.Session["errorMessage"] = setMessage("error", errorMessage);
if (!redirecting)
{
((HttpContext.Current.Handler as System.Web.UI.Page).Master as YourMasterPageType).MessagePlaceholder = getMessage();
}
}
EDIT
Sorry I forgot this
In Page_Load event of your master page
if(!IsPostBack)
{
messagePlaceholder.InnerHtml = Errors.getMessage();
}
I was asked to develop an auto-mail sending program on asp.net. It is supposed to send, say 5000 e-mails reading the addresses from a database. It will sure fall into request timeout tough. So it seems I have to convert it into a windows app. But I'd like to know if ajaxifying this web-app would help. If I write a web service, and my web app sends the mail addresses as lists of 50 at a time. when done, send the next 50 and so on. Would this help to solve the problem of http request timeout?
Using a webservice endpoint to send your emails is a good idea, whether you call it from an aspx class or from the client with javascript.
Simply use the webservice call to spawn a thread to send the emails and return immediately.
If you wanted visual progress cues then write another ajax endpoint or aspx page that will display the status of the email thread's progress.
There are many ways to accomplish this, you should be able to come up with one with the information given.
Batching from ajax is probably going to be more work than you want to do and adds unnecessary complexity (which is never a good thing).
this is interesting. I may spike this and post some code.
Ok, im back. here ya go. both a webform ui and an ajax ui.
None of this is meant to be finished product - is a spike to support a story. bend/fold/spindle at will.
EmailService.asmx
using System;
using System.ComponentModel;
using System.Threading;
using System.Web.Script.Services;
using System.Web.Services;
namespace EmailSendingWebApplication
{
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
[ScriptService]
public class EmailService : WebService
{
private static EmailSendingProgress _currentProgress;
private static Thread _emailThread;
/// <summary>
///
/// </summary>
/// <param name="criteria">just an example</param>
/// <param name="anotherCriteria">just an example</param>
/// <returns></returns>
[WebMethod]
public EmailSendingProgress SendEmails(string criteria, int anotherCriteria)
{
try
{
if (_currentProgress != null && _emailThread.IsAlive)
{
throw new InvalidOperationException(
"Email batch is already in progress. Wait for completion or cancel");
}
// use your criteria to cue up the emails to be sent.
// .....
// and derive a way for a thread to identify the emails
// i am using a batchid
int batchId = 1000; // contrived
// create a thread
_emailThread = new Thread(ProcessEmails);
_currentProgress = new EmailSendingProgress
{
Status = ProcessState.Starting,
BatchId = batchId
};
// you could use a 'state' object but this process/thread
// is single use/single instance just access _currentProgress
// by the static member
_emailThread.Start();
return _currentProgress;
}
catch (Exception ex)
{
_currentProgress = new EmailSendingProgress
{
Status = ProcessState.Error,
Message = "Error starting process:" + ex.Message
};
}
return _currentProgress;
}
[WebMethod]
public EmailSendingProgress CancelEmailProcess()
{
if (_currentProgress != null && _emailThread.IsAlive)
{
_currentProgress.Cancel = true;
_currentProgress.Message = "Cancelling";
}
return _currentProgress;
}
[WebMethod]
public EmailSendingProgress GetProgress()
{
return _currentProgress;
}
private static void ProcessEmails()
{
// process your emails using the criteria, in this case,
// a batchId
int totalEmails = 100;
int currentEmail = 0;
lock (_currentProgress)
{
_currentProgress.Total = totalEmails;
_currentProgress.Status = ProcessState.Processing;
}
for (; currentEmail < totalEmails; currentEmail++)
{
lock (_currentProgress)
{
if (_currentProgress.Cancel)
{
_currentProgress.Status = ProcessState.Cancelled;
_currentProgress.Message = "User cancelled process.";
break;
}
_currentProgress.Current = currentEmail + 1;
}
try
{
// send your email
Thread.Sleep(100); // lallalala sending email
}
catch (Exception ex)
{
// log the failure in your db
// then check to see if we should exit on error
// or just keep going.
lock (_currentProgress)
{
if (_currentProgress.CancelBatchOnSendError)
{
_currentProgress.Status = ProcessState.Error;
_currentProgress.Message = ex.Message;
break;
}
}
}
}
{
// don't want to obscure state/message from abnormal
// termination..
if (_currentProgress.Status == ProcessState.Processing)
{
_currentProgress.Status = ProcessState.Idle;
_currentProgress.Message = "Processing complete.";
}
}
}
}
public enum ProcessState
{
Idle,
Starting,
Processing,
Cancelled,
Error
}
[Serializable]
public class EmailSendingProgress
{
public int BatchId;
public bool Cancel;
public bool CancelBatchOnSendError;
public int Current;
public string Message;
public ProcessState Status;
public int Total;
}
}
WebFormUI.aspx
<%# Page Language="C#" %>
<%# Import Namespace="EmailSendingWebApplication" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
var svc = new EmailService();
UpdateProgress(svc.GetProgress());
}
protected void SendEmailsButton_Click(object sender, EventArgs e)
{
// arbitrary params - modify to suit
string criteria = string.Empty;
int anotherCriteria = 0;
var svc = new EmailService();
UpdateProgress(svc.SendEmails(criteria, anotherCriteria));
}
protected void CancelEmailProcessButton_Click(object sender, EventArgs e)
{
var svc = new EmailService();
UpdateProgress(svc.CancelEmailProcess());
}
private void UpdateProgress(EmailSendingProgress progress)
{
SetButtonState(progress);
DisplayProgress(progress);
}
private void DisplayProgress(EmailSendingProgress progress)
{
if (progress != null)
{
EmailProcessProgressLabel.Text = string.Format("Sending {0} of {1}", progress.Current, progress.Total);
EmailProcessStatusLabel.Text = progress.Status.ToString();
EmailProcessMessageLabel.Text = progress.Message;
}
else
{
EmailProcessProgressLabel.Text = string.Empty;
EmailProcessStatusLabel.Text = string.Empty;
EmailProcessMessageLabel.Text = string.Empty;
}
}
private void SetButtonState(EmailSendingProgress progress)
{
if (progress != null &&
(progress.Status == ProcessState.Starting || progress.Status == ProcessState.Processing))
{
CancelEmailProcessButton.Visible = true;
SendEmailsButton.Visible = false;
}
else
{
CancelEmailProcessButton.Visible = false;
SendEmailsButton.Visible = true;
}
}
protected void RefreshButton_Click(object sender, EventArgs e)
{
// noop just to get postback. you could also use meta headers to refresh the page automatically
// but why?
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<br />
EmailProcessStatus:
<asp:Label ID="EmailProcessStatusLabel" runat="server" Text="EmailProcessStatus"></asp:Label>
<br />
EmailProcessProgress:
<asp:Label ID="EmailProcessProgressLabel" runat="server" Text="EmailProcessProgress"></asp:Label>
<br />
EmailProcessMessage:<asp:Label ID="EmailProcessMessageLabel" runat="server" Text="EmailProcessMessage"></asp:Label>
<br />
<br />
<asp:Button ID="SendEmailsButton" runat="server" OnClick="SendEmailsButton_Click"
Text="Send Emails" />
<asp:Button ID="CancelEmailProcessButton" runat="server" OnClick="CancelEmailProcessButton_Click"
Text="Cancel Email Process" />
<br />
<br />
<asp:Button ID="RefreshButton" runat="server" OnClick="RefreshButton_Click" Text="Refresh" />
</div>
</form>
</body>
</html>
AjaxUI.htm
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
//http://www.codeproject.com/Articles/38999/Consuming-ASP-net-WebServices-WCF-Services-and-sta.aspx
var ProcessState = ["Idle", "Starting", "Processing", "Cancelled", "Error"];
function createXHR() {
var xhr;
if (window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
}
else if (window.ActiveXObject) {
xhr = new ActiveXObject('Microsoft.XMLHTTP');
}
else {
throw new Error("Could not create XMLHttpRequest object.");
}
return xhr;
}
function emailAjax(operation, postData, callback) {
var xhr = createXHR();
xhr.open("POST", "EmailService.asmx/" + operation, true);
xhr.onreadystatechange = function() {
if (xhr.readyState === 4) {
callback(xhr.responseText);
}
};
xhr.setRequestHeader("content-type", "application/json");
xhr.send(postData);
}
function $(id) {
var e = document.getElementById(id);
return e;
}
function startProcess() {
var postData = '{"criteria" : "something", "anotherCriteria" : "1"}';
emailAjax("SendEmails", postData, displayProgress);
}
function cancelProcess() {
emailAjax("CancelEmailProcess", null, displayProgress);
}
function getProgress() {
emailAjax("GetProgress", null, displayProgress);
}
function displayProgress(json) {
eval('var result=' + json + '; var prg=result.d;');
$("EmailProcessMessage").innerHTML = "";
$("EmailProcessStatus").innerHTML = "";
$("EmailProcessProgress").innerHTML = "";
$("CancelEmailProcessButton").style.display = "none";
$("SendEmailsButton").style.display = "none";
if (prg) {
$("EmailProcessMessage").innerHTML = prg.Message;
$("EmailProcessStatus").innerHTML = ProcessState[prg.Status];
$("EmailProcessProgress").innerHTML = "Sending " + prg.Current + " of " + prg.Total;
}
if (prg && (prg.Status == 1 || prg.Status == 2)) {
$("SendEmailsButton").style.display = "none";
$("CancelEmailProcessButton").style.display = "inline";
}
else {
$("CancelEmailProcessButton").style.display = "none";
$("SendEmailsButton").style.display = "inline";
}
}
function init() {
$("SendEmailsButton").onclick = startProcess;
$("CancelEmailProcessButton").onclick = cancelProcess;
// kinda quick but we are only proccing 100 emails for demo
window.setInterval(getProgress, 1000);
}
</script>
</head>
<body onload="init()">
EmailProcessStatus:<span id="EmailProcessStatus"></span><br />
EmailProcessProgress:<span id="EmailProcessProgress"></span><br />
EmailProcessMessage:<span id="EmailProcessMessage"></span><br />
<input type="button" id="SendEmailsButton" value="SendEmails" style="display: none" />
<input type="button" id="CancelEmailProcessButton" value="CancelEmailProcess" style="display: none" />
</body>
</html>
So user will have to leave the browser window open until all the e-mails are sent? Does not sound very good. I would solve this using a daemon or simple script that is run by cron (and checks db if there is something to send), on Windows I hope you can do something similar (write Windows service etc.). This is a purely server-side task, I think ajaxifying it shows that author of the web app wasn't able to make it in a better way, it may even make your web app to be mentioned on thedailywtf.com :)