C# - HttpModule To Write Out JavaScript Script References To The Response
Mar 11, 2010
On my page in the Page_Load event I add a collection of strings to the Context object. I have an HttpModule that will fire EndRequest and retrieve the collection of strings. What I then do is write out a script reference tag (based on the collection of strings) to the response. The problem is that the page reads the script reference but doesn't retrieve the contents of the file (I imagine because this is occurring in the EndRequest event). I can't fire the BeginRequest event because I won't have access to the Context Items collection.
I tried to also registering an HttpHandler which Processes the request of the script reference but I can't access the collection of strings in the Context.Items from there.
[code]....
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Mar 24, 2011
I'm having a problem with this code:
[code]....
The thing is that, the first if statement works fine and the 'javascript' shows an alert and close the window, but in the second if statement the javascript shows the message but doesn't close the window.
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Apr 22, 2010
what is difference between Response.write and Response.output.write
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Jul 2, 2010
I have written an Http Module that hooks onto the Response.Filter property of the current request and does various replacements within the HTML before it is sent to the client.All the work is done in the Write method which is overriding Write in the base class Stream.
The Write method is called multiple times for a single response - the HTML seems to be written to the output stream in chunks. My problem is that I don't have an efficient & reliable way of telling if the current chunk is the last chunk (for why I want to know this see below). The only way I have come up with is to check if the chunk contains a closing html tag - but this is not very efficient or reliable.
The reason this is needed is that the module must add the "Refresh" HTTP header to the response, but only if the HTML fulfills certain conditions (and there are certain conditions that mean the header must not be added). So, only when the last chunk has been seen does the code know if the header can be added or not. So, I either need a test for the last chunk, or on each call to Write I add the header if the current block of HTML passes the test (if it has not already been added) or remove the header if the current block of HTML fails the test (if it has already been added).
So, is there a better way to test for the last chuck OR is there a way to test for a particular header being in the response and delete it (there doesn't seem to be a way to do this - only to append headers)?
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Jan 23, 2010
as subject, how can i read Response Headers inside an httpmodule?
i need the "Content-encoding" header value.
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Feb 8, 2011
I'm trying to create a HttpModule that changes the Response.Filter like so(for this demonstration just set the filter back to itself):
public class ContentTrafficMonitor : IHttpModule
{
public void Init( HttpApplication context )
{
context.BeginRequest += OnBeginRequest;[code]....
Doing so sets the transfer encoding of the response to chunked, rather than using the Content-Length header.If I remove the line where the Response.Filter is set, the response does have the Content-Length header. Our application depends on the Content-Length header, is there any way to prevent this behavior?
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Jan 2, 2011
am trying to write an HttpModule that will work in IIS7 with integrated pipeline mode AppPool. Within this module I need to access Session variables and to be able to capture the Session Start and End events. I have found a couple of articles on this topic that indicate the need to modify the behavior of the HttpHandler in PostAcquireRequestState to force the Session for the context to be initialized. The article I am using as a template is posted here:[URL]In my case I am getting the following error:
[NullReferenceException: Object reference not set to an instance of an object.] System.Web.PipelineModuleStepContainer.GetEventCount(RequestNotification notification, Boolean isPostEvent) +30 System.Web.PipelineStepManager.ResumeSteps(Exception error) +1112
System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext context, AsyncCallback cb) +113 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +616
I believe that this error implies a problem with attempting to attach an event handler multiple times. I am aware that the modules Init function can be called more than once and have set a static initialization flag which ensures that I will only ever attach the event handler once.In the most condensed form my code is as follows:
public class HttpModule : IHttpModule, IRequiresSessionState
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Oct 6, 2010
i am calling a function which is inside Homescroll.ascx.cs from Homescroll.ascx so i wrote on Homescroll.ascx as <% Response.Write(scroll()); %> but all this is in update panel,and i am getting errors. so is their any other way to call function from homescroll.ascx to homescroll.ascx.cs,instead of response.write();
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May 11, 2010
I'm trying to include script and style references that will not break on deployment, however I can not even get the references to work locally. I have tried using Url.Content() and MVCContrib's <%=Html.ScriptInclude("")%>.
My scripts are in a Scripts folder on the root of the site; my styles are in the usual Content/css/ folder.
The scripts render like this:
<script type="text/javascript" src="/Scripts/MicrosoftAjax.debug.js" ></script>
This will not work in a view page in the Views folder. What am I doing wrong and what is the best way to handle this?
I would have thought Url.Content() would at least work for styles but used in my master page, the link rendered
<link href="/Content/css/Site.css rel="stylesheet" type="text/css" />
This does not work, because the Master Page is in a Shared folder, so what is really the way forward with this?
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Jan 24, 2010
I have written simple HttpModule. context.Response.Output.Write is working fine. but not context.Response.Write().
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May 31, 2010
the purpose of this HttpModule? It's showing up on my HttpModuleCollection list, but I don't know what's it's for.System.ServiceModel.Activation.HttpModule
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Feb 16, 2010
I am using Reporting Services to render a report directly to PDF. It requires that I use two web references: ReportExecution2005.asmx and ReportService2005.asmx. The performance on web references seems really poor. Since my web server (IIS7) and my SQL Server (2008) are on the same box, is there a way I can reference them directly? If not is there any way I can explicitly cache them or something. First load is really really slow, second load is perfectly acceptable.
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Jan 22, 2010
I have a new blogengine site up and want to set up syntax highlighting. The problem is that I have a few files (javascript and css) that I need to add the the head of the page, but there is no one page or masterpage. where to write out these references so they will show up on all pages?
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Mar 16, 2011
I'm using Lightbox but i only want the references to the stylesheet and javascript files to be in the masterpage header on one page on the site (the page that uses lightbox). how do I programmatically add references to the stylesheet and javascript files in the page load?
the stylesheet is the 'css' folder and the three javascript files are a 'js' folder
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Jan 21, 2010
Let me explain better than what the question state. I dynamically generate a KML file from an aspx page and use routing to change the url so I can access myapp.com/mykml.kml and the download starts. I use Response.write() in the aspx page to send the data and it work flawlessly. But there is a zipped version for KML files which is KMZ and I am wondering if I can still use my aspx page to serve a KMZ instead of a KML. Since I do not use a file I cannot "zip" it. Is there a way to zip the stream and output it in the Response.Write()?
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Sep 9, 2010
I have an ASP.NET application using a master page. I am adding a reference to the JQuery library in the master page however there are some content pages and user controls that reference the JQuery library directly. Will I need to remove each reference from those pages or can I leave them in place even though I am adding a reference into the master page of the application?
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Jan 26, 2011
I am creating a custom control and had a thought before I began. My control relies on the jQuery library to work. What if the user already has a version of the library already on their page. Will this effect anything? If my version is newer / older and my control will only work with that version of the libaray, what should I do?
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Sep 13, 2010
how come the following won't write to different lines? It is all in the same sub.
[Code]....
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Oct 13, 2010
I have the following subroutine:
Public Sub StartTimeDif()
Dim dt As DateTime = Convert.ToDateTime(starttimeInput.Text)
Dim dt1 As DateTime = Convert.ToDateTime(endtimeInput.Text)
Dim ts As TimeSpan = dt1.Subtract(dt)
Response.Write(ts.Minutes)
End Sub
and I'm trying to pass (ts.minutes) to durationLabel.
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Oct 25, 2010
In the past I have always worked from the code behind page in ASP.NET and emitting all of my markup from that area.I am now learning MVC and am working in the .ASPX page directly.
<%= Html.Label("Test") %>
<%: Html.Label("Test")%>
<% Html.Label("Test"); %>
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Nov 18, 2010
UPDATE:
The service cannot be activated because it does not support ASP.NET compatibility. ASP.NET compatibility is enabled for this application. Turn off ASP.NET compatibility mode in the web.config or add the AspNetCompatibilityRequirements attribute to the service type with RequirementsMode setting as 'Allowed' or 'Required'.
when i try to access wcf service i get this error: the reason is HttpContext.Current is null, what should i do in this case?
Object reference not set to an instance of an object.
System.Web.Script.Serialization.JavaScriptSerializer s = new System.Web.Script.Serialization.JavaScriptSerializer();
Person p = new Person() { FirstName = "First name", LastName= "last name" };
string json = s.Serialize(p);
System.Web.HttpContext.Current.Response.Write("jsoncallback" + json);} //error
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Feb 23, 2011
I have database code like this
try
{
string strConnectionString = ConfigurationManager.ConnectionStrings["SqlServerCstr"].ConnectionString;
SqlConnection myConnection = new SqlConnection(strConnectionString);
myConnection.Open();
string hesap = Label1.Text;
string musteriadi = DropDownList1.SelectedItem.Value;
string avukat = DropDownList2.SelectedItem.Value;
SqlCommand cmd = new SqlCommand("INSERT INTO AVUKAT VALUES (@MUSTERI, @AVUKAT, @HESAP)", myConnection);
cmd.Parameters.AddWithValue("@HESAP", hesap);.......
It works fine but what I want, in the catch function, is to call the javascript alert function.
I've tried this
Response.Write("<script language=javascript>alert('ERROR');</script>);
But there is an error
How can I show error message in javascript alert function?
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Jan 3, 2011
I am trying to force a download of an XML file when the user visits a page.
This is the code I am using
public partial class GenerateTemplate : LayoutsPageBase
{
protected void Page_Load(object sender, EventArgs e)
{
//.............
//Going about generating my XML
//.............
Response.ClearContent();
Response.AddHeader("content-disposition", "attachment; filename=template.xml");
Response.Write(xmlDoc.InnerXml);
Response.Flush();
Response.Close();
}
}
I am facing a problem that my download window hangs indefinitely, without ever completing the download/Open of the file.
What am I doing wrong? Am I not disposing any objects or closing any connections here?
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Jan 5, 2011
how can i get get below value into asp:textbox
Response.Write("<script id=""mycountry3"" language=""Javascript"" src=""http://www.ip2phrase.com/ip2phrase.asp?template=You are from Country: <COUNTRY> ""></script>")
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Apr 21, 2010
in a webpage I have a link to let the user download file, such as,
<a href="showfile.aspx?filename=xxx">download file</a>
in showfile.aspx, I send the file using Response.OutputStream.Write method. now I get some problem when somebody put this webpage in an IFrame and open in IE, as I checked the code, showfile.aspx is requested twice when clicks the link, and in the second time the cookies of authorization and session Id are missing. I tried to add the p3p header but not working.my question is, is this how the IE designed with iframe? is there anyway to work around?
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