HttpHandlers / Modules :: Image Changing In Client Side?
Mar 2, 2011
Environment: IE7, ASP.NET 3.5 SP1, C#, IIS 7, intranet, SQL server 2008 R2 enterprise. I'm trying to implement a page with 3 pictures in it (each picture is up to 1MB, jpg format), and switch them with the next 3 each 250 milliseconds. I thought of several methods for implementation:
1. Store all the pictures in a virtual folder, then switching the src attribute of img html element by javascript, and manipulate caching by storing the next 9 pictures also as img element, but with display:none for css.
2. Store the images in a database table and than send it to the client using DIME (don't know how to do it yet).
3. Store the images in a database table and use custom http handler to retrieve the picture (don't know how to do it yet).
4. Client invocation of webservice? Which of the above results the best performance? Is there another method for caching pictures?
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Mar 16, 2011
I am writing a custom HTTP module to implement user authentication and appropriate access rights. And for identifying access rights for the user also depends on identifying the client's machine details like IP address, machine name, etc. The access rights will depend based on from which location or machine the user is trying to login.
Can we get these details from the HttpApplication or HttpContext object?
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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).
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May 24, 2010
I am using Webhandler to upload images to the server. I want to send the folder name so on that folder the images will save. I am using this URI format and got the below error.
builder.Path = builder.Path.TrimEnd('/')
+ "/Services/FileReceiver.ashx?foldername=" +
folder;
this.Uri
= builder.Uri;
Also I added the following line in the web.config but still having the issue.
<httpRuntime requestValidationMode="2.0" />
A potentially dangerous Request.Path value was detected from the client (?). Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: A potentially dangerous Request.Path value was detected from the client (?).
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack
Trace:
[HttpException (0x80004005): A potentially dangerous Request.Path value was detected from the client (?).]
System.Web.HttpRequest.ValidateInputIfRequiredByConfig() +8884233
System.Web.ValidateRequestExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +35
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184
Version
Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
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Dec 29, 2010
v4 NET framework / ASP.NET
I am trying to retrieve an image created by a handler. Here is the code for the handler:
[Code]....
Here is how i call it from an aspx file:
[Code]....
The image is missing from the webpage generated.
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Aug 16, 2010
I'm trying to display product information in a repeater and trying to display the images as well by using a GenericHandler class but I can't get the image to show up in my page.
Here is my Handler.ashx class:
[Code]....
...and here is my repeater code in my webpage:
[Code]....
...and when pulling it from the database and loading my Product object, I convert it to a Byte array:
[Code]....
[Code]....
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Sep 21, 2010
I'm having a heck of a time getting an image to display from a SQL database. When I view the source of the page in Firefox and then click on the link in the source for the image control, I see the following message:
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Here are the details:
The column holding the image is an "image" data type.
Code on the ~/some_members/members.aspx page:
[Code]....
Handler.ashx code:
[code]....
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Mar 4, 2011
I have 50 sites for 50 states. When a company uploads their contact info their image is stored in a folder relative to the site they are uploading from. When you view this company on the other sites the image is not present. So, I was thinking I would store the path of where the file is originally and then access it through the handler, but I can't seem to get the handler to recognize locations other than virtual directories.
[Code]....
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Jun 30, 2010
a silverlight app sends an image to a webservice which store the image in a database and then a handler retrieves the image from the db to display it... quite common so far.
Everything is working absolutely fine on my test server (IIS on my development machine) but, as soon as i try it on the production server : no way, the image is never displaying (in any browser). Firefox says that it cannot display it because it contains error...
I tried to download the database from the production server just after saving an image to the db and, locally, the image is displaying...
The image is in png format.
Here is my code :
[Code]....
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Nov 30, 2010
I use http handler for loading images.
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Mar 6, 2011
I had a Handler to display User's Image by UserId. it worked when I debug in Microsoft Visual Studio 2010, But when I published to the web server the Image did not display. I also used Microsoft Visual Studio 2010 to debug from the the Directory on the web server, it worked too. But when I tried it through browser it doesn't work.
Here is the Handler:
[code]...
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May 10, 2010
I want to download images from third-party server. for that third-party provide url link for each page.
samples are provideded below.
[URL]
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Feb 27, 2010
I am working with ihttphandler.It works well in IE,Opera,FireFox. But,in chrome the image is not shown.
HTML Source Code
<!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>
<style type="text/css">*{margin:0 auto}</style>
</head>
<body>
<form name="form1" method="post" action="default.aspx" id="form1">
<div>
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwULLTE2MTY2ODcyMjlkZLSbnrzjxrqlo27jCzAHRe8onliv" />
</div>
<marquee width="80%" onmouseover="this.stop();" onmouseout="this.start();"><img id="img" src="ImageHandler.ashx" style="border-width:0px;" /></marquee></form>
</body>
</html>
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Mar 26, 2010
I wrote a generic handler like this:
[Code]....
and on the other page I would like to retrieve the database image using :
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Jan 18, 2010
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Jan 6, 2011
GetProductData return correct image url but in my ashx page it doesn't appear.
List<ProductItem> p = ProductFactory.GetProductData(); foreach (ProductItem c in p) { rss.WriteStartElement("item"); rss.WriteElementString("title", c.Page_Title); rss.WriteElementString("link",
[code]...
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Jan 13, 2010
I am using a handler to pull an image from the database and I need to resize the image while maintaining the aspect ratio.I have seen a few examples, but they were all pulling the image from the filesystem and not a database. This is the code I am using inside the handler to pull the image from the database:
[Code]....
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After adding a custom module, Module list is showing MyModule "Entry Type" as "Local".
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Dec 10, 2010
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Jun 8, 2010
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Feb 3, 2011
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<script type="text/javascript" language="javascript">
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$("#<%=cmd.ClientID %>").click(function () {[code]....
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Mar 19, 2010
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[URL]
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Since I think this is a JavaScript issue, I'm posting that part of my code:
[Code]....
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Nov 23, 2010
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[code]...
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<script type="text/javascript">
function ValidateDateFields_Client(source, args) [code]...
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<script type="text/javascript">
//<![CDATA[
var ctl00_MCPH1_QueryTextValidator = document.all ? document.all["ctl00_MCPH1_QueryTextValidator"] : document.getElementById("ctl00_MCPH1_QueryTextValidator");
[code]...
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