Web Forms :: Sending Data From Client To Server Via Internet?
Jul 15, 2010
i have a website in our office which is a School. the website is an enrollment website which is available view internet, where the users (students) access the website to enroll almost simultaneously, select their subjects and schedules, etc.
this website is developed by someone who is no longger employed here. regular problem of the website is in times of enrollment, the students is experiencing slow processing when ever thay try to view/edit their information, subjects, etc. which are all in the database. a proposal was made and we have agreed to develop a new system that should run faster than the old system. access sql database to do Select/Update/Insert in the fastest way possible.
I have situation where I need to authenticate a client across multiple web services. Basically each service needs to identify the client and know a few other small pieces of information about the client.
The way I have it working now is that the needed identifying information is stored in a session table in a database by the authenticating web server. The web server hands the client an string, which IDs the database entry and gets passed to the other web services. The web services then use this string to pull the needed information about the client from the database entry.
It has occurred to me that it might be possible to give the client an encrypted blob that contains the user ID and other needed information, which is rather small, and avoid using the database for this completely. The client would just pass around the blob (like the string in the previous paragraph) without needing to know what it contains, and only the web services would know how to decrypt it.
This should eliminate the need for the database to store the session information and would make the whole process a good bit simpler. With the database you have to worry about cleaning up old sessions and timeouts and so on.
So my question: is passing around sensitive data from service to service via client considered safe and acceptable? Is it possible to do this in a way that would eliminate worry about the client tampering with the data? What encryption algorithms would be good to use?
I want to send a file by converting it into binary file to the client end and then it should be read by javascript which again I am passing to the OCX method.(like my OCX method accept only the binary data so i have to transmit binary data from server side to client).
I want to send a email without using gmail domain but its giving error given below...
The SMTP server requires a secure connection or the client was not authenticated. The server response was: Relaying not allowed - sender domain not local
Now I am printing the data from model in mvc. I am also printing the documents, How I upload file how to print that particular documents which is related that particular user with the other data...
What is Web services? What is Web services? How can I Transfer the data from server to client and client to server using XML. Need one simple Example program(C# web Application) ...
I'm transforming lotus note application to ASP.NET.In lotus note, we can pass the application(data) from staff to his/her manager for approval.The staff can also check status of his/her data whether the manager is opening it, approved it or not.This process can be done in real time. I mean on the staff screen he/she will see status is changing from data sent --> manager is opening --> manager accepted or manager rejected it.In the same time, if other staffs try to track this application(data) they will see the same screen with the first staff.ow, in asp.net, i'm thinking of sending data from staff to manager directly. I don't want manager's web browser need to do polling for every xx millisecond. I'm not quite too sure it can be done or not in asp.net because i'm not the WEB guy.After doing a research for a while, i found that comet may help me on that but it seems pretty hard. And I don't know it is suitable for my problem or not or someone may guide me a better idea on this.
Currently, I am exploring options for sending data to the client. What I am hoping for is suggestions, or a pros and cons feedback.
What I am wanting to do is query the database then send this data to a web service ( or maybe wcf ). Once there, jquery ( or another JS library ) will utilize this data to fill a grid/tree/form depending. This all seems very very basic, but what concerns me is the amount of data that can be sent. I have seen some grids that have 16K records...and what worries me is that would be WAY too much data to send.
I was just wondering how these things are handled. My current thoughts are to do a 'onDemand' loading, but my inexperience has me second guessing. Also, I know this isn't directly related to jquery, but I notice there are a lot more examples with wcf rather than webmethod/web services.Is wcf better for these types of things?
I use a Smtp Client to email submitted information from an asp.net form. 3 users sent in their information and the user on the other end did not recieve either one of the emails. On the 2nd time around, she did recieve the emails. What could it be?
am sending email to the users using smtp client and MailMessage class.i have been adding the addresses of multiple receivers in the to property of the object of MailMessage class. the problem is that the receiver can see the email addresses of other receipents. is there any way to hide the email addresses of other receipents.i mean setting some property or something like that.otherwise i will be left with only option to send individual email to the users.
I have some dedicated servers running ASP.NET applications over internet. All servers are fully trusted (all belongs to the same company) and need to communicate to each other in a secure way. They are not part of a domain or work group and should not be.Each server acts as both client and server of some WCF services. These services are few (1-2 per server) and light (a little data is transferred on each call).
I can use self-signed SSL certificates or X509. I'm looking for some way to make sure nobody from internet can call a WCF service on a server. New server would be added in the future.I read about WCF but now I'm confused, is it good idea to use self-signed SSL certificates or not (non self-signed is not an option at the moment), which binding to use, which security mode to use, which authentication method to use
I've been pulling my hair out about this for ages. I have a WebService which sends a zip file to the browser. This works; when I test the WebService and 'invoke' the method through it directly, the zip file is downloaded to the browser correctly.
The problem arises when I use jQuery to send an AJAX request to the WebService - the zip file is downloaded to the response, but it stays in the response and doesn't download as a file.
Here is my code:
[Code]....
Now this works since the file downloads when I use the 'invoke' function when navigating directly to the service.
Here is my jQuery AJAX request...
[Code]....
I added the code in 'beforeSend' so that the request states explicitly what type of response the browser should expect.
I've been using Firebug to monitor the request/response headers and can't see anything wrong with them (except when I look at the content of the response, it's full of binary data AND its the same size as the file I'm sending.
I just attempted to upload screen-dumps of the request/response headers and the content of the reponse but I don't have enough reputation points to do this yet :-(
The Response is the same size of the Zip file so I'm assuming its being sent back to the browser, but the browser doesn't know what to do with it.
Tested in IE, FF & Chrome and the results are consistent.
I have a page (generic handler) on which I want to return the status code 500 to the client to indicate that something is wrong. I do it like this:
Response.StatusCode = 500; Response.StatusDescription = "Internal Server Error";
And at the same time I render a friendly message telling the user that something went wrong. But instead of seing my message, I get the default IIS message saying something like this:
Server Error 500 - Internal server error. There is a problem with the resource you are looking for, and it cannot be displayed.
And if I go in to IIS and remove the error page for 500, I get this message:
The page cannot be displayed because an internal server error has occurred.
It works as intended in IIS6, but not in IIS7. What should I do to get it working in IIS7?
I'm converting a bunch of FOXPRO / FOXWEB apps to ASP.NET.
The underlying DB is still foxpro (for the moment).
I am passing a table to some VB.NET code that I want to have converted to a CSV file and sent back to the client for download. And it works! Sort of ... It works sometimes, but at other times, instead of asking me if I want to download the CSV file, it just spews the file to the browser window.
On the asp side, I am passing the response object, the table and the csv file name.
I have created a web application that calls a web service that requires a Client Certificate for authentication. Here is a snippet of how I am building the request:
This all works, but only intermittenly. About every 24 hours the Server hosting the web service returns a 403:Forbidden error. The only way to fix it is to do a iisreset of the server running the web application. We are completely stumped about this issue and would like to know if this issue has something to do with the web application or the configuration of the server it is being hosted on.
The subject of this thread is my question and I am really very sorry, I cannot brief it. I have generated the pdf file which contains text taken as input by various web-form and have saved it in my local drive then sended it to some email addresses. Now I want to know that how can I save it in client computer and send it to some email addresses provided by Client on demand? I am failed to solve this problem as I don't know how to get INFORMATION OF CLIENT'S LOCAL DRIVE AS CLIENT MAY USES DIFFERENT OPERATING SYSTEM.
I am looking for a means by which ASP.NET can create an Outlook MailItem and stream it to the client machine for the user to review prior to sending. I know that its possible to create files such as Word docs and Excel spreadsheets an then stream them, but I don't know how to do it with ASP.NET.
This process should be correct. But sometimes I only get a blank document in client side. I am sure the dotx generated in server side is not blank. What may cause that problem? Does error happen during sending data to client-side with Response, or is my code not good?
I have built a basic calendar event using DDay.iCal, when I click "Add to calendar" link I produce an event and then sends this to the client.Basically, my application works like this.
A User logs in. Selects a specific date. Books a specific timeslot Clicks the "Add to calendar" link
Sending the event is done by using Response.Write() which sends the following to the client:
The above works fins but it requires me to first book the event then manually and then click the "Add to calendar" link.I want to merge the steps 3 and 4. But when trying to do so the event booking gets saved to the database but the screen does not get refreshed.Is there a "simple" way to get around this?
I've tried these settings, and also tried explicitly setting the properties of my SmtpClient object @ run-time. On send, I receive the following exception
"Failure sending mail. Unable to connect to the remote server - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 64.202.165.58:25"
I have a web application which runs perfectly in my local machine. But the same when hosted in server, for some pages (which gets large amounts of data) gives me:-
Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data.-- in chrome Server not found-- in firefox
and Internet Explorer cannot display the webpage-- in IE
I went through lot of other forums and some were suggesting to put this is web.config file
I have a data entry and editing form and in every data entry or update event, I have to send an email to a dynamic list of recipients. I have been sending the email as soon as the user clicks the save or edit buttons but am thinking of first saving the data to the database, and then sending the email later. I want to do this partly to improve the response time of the application as the email sending tends to take a long time than desired.
