Sending A Binary Stream To The Clients Browser?
Aug 1, 2010
I was wondering if there is any difference in performance (or any other important factor) between a file sent to the browser from our server by this method :
For i = 1 To fileSize chunk
If Not Response.IsClientConnected Then Exit For
Response.BinaryWrite stream.Read(chunk)
Response.Flush
Next
VS
the old plain file access method that the IIS comes with.
We are working on a file manager handler for security reasons and would like to know what is the performance hit.
View 3 Replies
Similar Messages:
Mar 15, 2011
I have an ASP.NET page with a text status and a button to export an Excel file. When the user clicks the button, I want to generate the file on the fly and return it to the client as binary stream. Then I want to change the text status to show success/failure.
So far I can generate and send the file no problem, but obviously the statuses don't get displayed, since the server response was used to send the file and not a new updated page with the new status.
I'm not sure what's the cleanest way to approach this. I can think of something but is it the best way:
User clicks on button. File is generated and saved as a stream in the session. Statuses are updated and the page with the new statuses is returned to the client. A piece of Javascript on the page opens a 3rd party page which retrieves the saved stream from the session.
View 1 Replies
Feb 3, 2011
I have a problem with deserializing in C#/ASP.NET, which gives the exact error:
The input stream is not a valid binary format. The starting contents (in bytes) are: 41-41-45-41-41-41-44-2F-2F-2F-2F-2F-41-51-41-41-41 ...
What I am trying to do
I have a structure with 3 classes. I have a class A which is a base class, and then class B and C which are derived from A.
I am trying to store random types of B and C in the database using LINQ to SQL, in a column with the type VARCHAR(MAX).
I cannot use BINARY as the length is around 15.000.
My code...
[code]...
So the error happends when the first Deserialize method is run, with the above error.
View 2 Replies
Nov 1, 2011
Any code snippet or third party utilities to do this? Anything built into .NET libraries?
View 3 Replies
Nov 1, 2010
I have a MS Chart Control and I'm trying to serialize the chart to view state. When teh page postbacks, I wnat to de-serialize the chart from ViewState, then load it back to the Chart's serializer. When the Chart1.Serializer.Load is called, I get an error message stating Data at the root level is invalid, line 1 position 1.
So here's what I have:
Chart1.Serializer.Format = System.Web.UI.DataVisualization.Charting.SerializationFormat.Binary;
Chart1.Serializer.Content = System.Web.UI.DataVisualization.Charting.SerializationContents.All;
Chart1.Serializer.Save(myStream);
ViewState["myStream"] = myStream.ToArray();
On postback, when the routine is called:
System.Byte [] byters;
System.IO.MemoryStream myStream = new System.IO.MemoryStream();
if (ViewState["myStream"] != null)
{
byters = (System.Byte[])ViewState["myStream"];
myStream.Write(byters,0,byters.Length);
myStream.Position = 0;
Chart1.Serializer.Load(myStream); // this line throws a XmlException - data at the root level is invalid. line 1 , position 1.
}
The length of the stream was 15,518 and capacity was 16,384 when it made the save. On postback, both capacity and length became 15,518.
View 1 Replies
Feb 12, 2010
I am running the code below to authorize payments but I wanted to know how secure is it to submit sensitive data like that, do I have to worry about any issues going on or no?
[Code]....
View 3 Replies
Jan 23, 2011
I have 2 domains that resolve to my web site www.mysite.com and www.mysitecommonmisspelling.com, plus the IP address. I have some code in my Global.asax file that was intended to force all users and crawlers to only use the main domain, like so:
Protected Sub Application_BeginRequest(ByVal sender As Object, ByVal e As System.EventArgs)
'If the domain isn't the correct top level domain for this environment,
'we want to do a 301 redirect to tell the search engines that this is not the right domain to
'index.
Dim Host As String = Me.EnvironmentHost
Dim CurrentHost As String = Request.Url.DnsSafeHost[code]....
I checked and Google has not indexed any pages on www.mysitecommonmisspelling.com, so they are apparently respecting the 301. However, a few days ago we had a customer on our site who got free shipping because the licensing code that is only registered for www.mysite.com failed (in other words, the browser was able to access www.mysitecommonmisspelling.com). In the past, we have had issues with the 3rd party shipping component because users were able to access the site using the IP address.
In any case, we don't want users to be able to access the site without the correct domain so the SSL certificate doesn't complain.
I have searched for a way to disable 301 redirects in IE7, but there doesn't appear to be a way. So, what I am wondering is if there are any browsers that can disable 301, and if so what kind of workarounds can I put in place to ensure all browsers on my site are going to the main domain, www.mysite.com?
View 1 Replies
Oct 29, 2010
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).
View 1 Replies
Jul 21, 2010
i am trying to open a pdf stream in browser but can't acomplish that.
i am using ICallBackEventHandler and when i get the data from the client side i call my function to open stream but this dose not work.
However when i try to do that without ICallBack this works(so the ICallBack is the problem)
this is my code in cs
public
partial
class
Default4 : System.Web.UI.Page,ICallbackEventHandler
{
{
[Code]....
View 4 Replies
Feb 22, 2011
I have an excel file in my Response Output stream. I can Open the stream as a file after a prompt, but it doesn't seem I can save it directly to a specified folder on my client.
View 1 Replies
Jan 30, 2010
I've asked this before but I was hoping for another answer and perhaps some code samples because I've been having a difficult time with this. I have an asp.net page. The user hits the "Run" button and I have code IN AN ASSEMBLY, not in the APP_CODE folder that is called and runs a long process that moves product info from a file into the database. While the user waits, I would like them to see status updates like what product the import process in on and status info. I'm assuming I'd break off into another thread and use Ajax but I have no idea how to do this.
View 2 Replies
Jun 4, 2010
I am trying to solve a problem that involves creating a very large XML string and stream that to browser. Right now i am using stringbuilder class. Here is the sample code
here i am using only just one property.
[code]....
total length of the final string will be 120MB or so.
With this code i am getting out of memory errors intermittently. To resolve this issue ..i am planning to create a HTTP handler for streaming XML output to browser.
View 3 Replies
Sep 20, 2010
Is it possible to convert a datatable into binary data and save it into on a binary field on database?
View 2 Replies
Jul 19, 2010
i will be passing the xml file like this:
[code]....
error:
Error 1 The best overloaded method match for 'System.Xml.Linq.XDocument.Load(string)' has some invalid arguments
cannot convert from 'System.IO.Stream' to 'string'
View 2 Replies
Feb 23, 2011
I have been googling this and have not come along a working solution for an entire day. I don't know anything about binary data types (as I've never knowingly used them) and I'm trying to write a binary value that I see in the registry, to the registry. Now, all I see is the following [shown below]... and if I try to pass that as a string to the RegSetValueEx in the WinAPI and of course it errors out... I do not know what 'numbers' I need to pass into the lpData As Any, argument of RegSetValueEx (i tried a bit array) in order for it to come out as the following [shown below] in the regedit. I really have no idea, and my tests to place random numbers in the bit array just produce corresponding random "figures" as visible in regedit that I do not understand how to 'tie' them together logically.
here is the culprit!
[Code]...
If I had the following in a string or a bit array, what must I populate the bitarray with so that the registry outputs this [above] when written? or, how can I figure out how to do it? I was hoping there'd be a function that reads my string of binary data and transforms it into the real binary format to submit to the RegSetValueEx function in VB6 or other function in VB.Net or C# (this really is a language agnostic question, and the problem exists in all languages; ie: same process).
View 2 Replies
Jul 22, 2010
I am working on sending twitter updates from my asp.net website. I have the authorization down but I am stuck when it gets to sending the tweet here is my code behind:
protected void btnAuth_Click(object sender, EventArgs e)
{
// add these to web.config or your preferred location
var consumerKey = ConfigurationManager.AppSettings["consumerKey"];
var consumerSecret = ConfigurationManager.AppSettings["consumerSecret"];
//If User is not valid user
if (Request.QueryString["oauth_token"] == null)
{
//Step 1: Get Request Token
OAuthTokenResponse RequestToken = OAuthUtility.GetRequestToken(consumerKey,consumerSecret);
//Step 2: Redirect User to Requested Token
Response.Redirect("http://twitter.com/oauth/authorize?oauth_token="+ RequestToken.Token);
}
else
{
//For Valid User
string Oauth_Token = Request.QueryString["oauth_token"].ToString();
var accessToken = OAuthUtility.GetAccessToken(consumerKey, consumerSecret, Oauth_Token, txtPIN.Text.Trim());
lblMessage.Text = "<b>Hello " + accessToken.ScreenName + ", Welcome to my Twitter App<b>";
lblMessage.Text += "<br/> Token: " + accessToken.Token;
lblMessage.Text += "<br/> TokenSecret: " + accessToken.TokenSecret;
lblMessage.Text += "<br/> UserId: " + accessToken.UserId;
lblMessage.Text += "<br/> VerificationString: " + accessToken.VerificationString;
}
}
protected void btnTweet_Click(object sender, EventArgs e)
{
// add these to web.config or your preferred location
var consumerKey = ConfigurationManager.AppSettings["consumerKey"];
var consumerSecret = ConfigurationManager.AppSettings["consumerSecret"];
OAuthTokens accessToken = new OAuthTokens();
accessToken.AccessToken = "xxxxxxxxxxxxxxxxxxxxxxxxxxxx";
accessToken.AccessTokenSecret = "xxxxxxxxxxxxxxxxxxxx";
accessToken.ConsumerKey = consumerKey;
accessToken.ConsumerSecret = consumerSecret;
TwitterStatus TweetStatus = new TwitterStatus();
TweetStatus.Update(accessTokens, txtTweet.Text);
}
I dont know how to get the AccessToken & AccessTokenSecret.
View 2 Replies
Feb 16, 2010
how can we ensure that a sub,it is not be used by two or more clients??
View 21 Replies
Jan 10, 2011
I have a WCF webservice that acts as a data provider for my ASP.NET web page. Throughout the web page a number of calls are made to the web service via the auto-generated ServiceClient. Currently I create a new ServiceClient and open it for each request i.e. Get Users, Get Roles, Get Customer list etc.... Each one of these would create a new ServiceClient and open a new connection.
Can I make my ServiceClient class a global or statically available class so that all functions within my ASP.NET web page can use the same client. This would seem to be far more efficient. Are there any issues with doing it this way? Any advice I should take into account when doing this? What happens if I make multiple requests to a client? Presumably it is all synchronous so it shouldn't matter if I make 1 or 50 calls to it?
View 2 Replies
Feb 22, 2011
As the title says I have a Win 7 64 bit dev machine, Win 2K3 32 bit production box and I run against Oracle 10g which Oracle clients do I need to run? Do I need to run the Oracle 32 and 64 bit clients? And if so what versions?
View 1 Replies
Jun 18, 2010
User1 open the website did something the progress bar starts. User2 open the same website that progress bar needs to display here.
View 1 Replies
Apr 26, 2015
I am adding new clients to a database using ASP.net I want to check if the username the client has chosen is not already in use by another client and highlight the relevant input box and write a message to select a different user name if it is.
Is there way to write to a specific place in the HTML similar to innerHTM? I haven't been able to find such. Alternatively i guess I could try an interact with client side Java, or re-write the whole page.
View 8 Replies
Jul 2, 2010
I'm not 100% sure that this is the right forum, but here goes.Is it possible with ASP.Net to reliably determine if the client (i.e., the browser) is using a proxy server? I'd like to prevent proxy users to a particular site.
View 3 Replies
Nov 4, 2010
i have an Asp.net application 3.5. I want to be able to allow multiple/ different clients to access the same application but using different url's. I have already managed to configure the database to allow this. So hia's the main part i want to host my application in a domain say... wwww.myapplication.com
then allow different client to access the same application using
1.www.clientOne.myapplication.com
2.www.clientTwo.myapplication.com
also the client subdomains i.e(clientone.myapplication.com and clienttwo.myapplication.com)should be autocreated by the client upon registration
View 5 Replies
Jan 21, 2010
I got a task from my boss to do a email previewer for different mails/browsers/clients. How should approach this task? How is such a thing done?EDIT:A tool to see how an email will render in different email clients
View 2 Replies
May 4, 2010
I want to get clients Time Zone offset from his IP address for my web app. I have tried using Javascripts getTimezone function, but, some clients have their timezone or time set incorrectly. I want to get the offset and render some information back on client based on their timezone.
View 4 Replies
