How To Add An HttpHandler For Image Extensions That Depending Whether A Variable In The Web.config
Mar 27, 2010
I am in the process of moving all of the images in my web application over to a CDN but I want to easily be able to switch the CDN on or off without having to hard code the path to the images. My first thought was to add an HttpHandler for image extensions that depending whether a variable in the web.config (something like ) will serve the image from the server or from the CDN. But after giving this a little though I think I've essentially ruled this out as it will cause ASP.NET to handle the request for every single image, thus adding overhead, and it might actually completely mitigate the benefits of using a CDN.
An alternative approach is, since all of my pages inherit from a base page class, I could create a function in the base class that determines what path to serve the files from based off the web.config variable. I would then do something like this in the markup:
<img src='<%= GetImagePath()/image.png' />
I think this is probably what I'll have to end up doing, but it seems a little clunky to me. I also envision problems with the old .NET error of not being able to modify the control collection because of the "<%=" though the "<%#" solution will probably work.
I have an website in IIS 6.0 (windows 2003). Inside that I had configured another application (As IIS Application).
Now, When I uncommend a "add verb" tag in main web.config file, the webservice inside the application throws "404 file not found exception" Is there anything which I need to update in child web.config?
Is there a way I can dynamically register an IHttpHandler in C# code, instead of having to manually add it to the system.web/httpHandlers section in the web.config.
This may sound crazy, but I have good reason for doing this. I'm building a WidgetLibrary that a website owner can use just by dropping a .dll file into their bin directory, and want to support this with minimal configuration to the web.config.
I've an application only used in my site, and I'm interested to put in production from a global scope and the same instance to all the sites.
The fastest solution I've in mind is to use the current database for each different site, as copy from current system and add/clean a new one when a new site will start using it.
For this purpose I though in a front database where to check the logged in user site and then, depending user configuration, access his own site database.
I'm using now a connection string called ConnectionString1 in all the controls/code-behind database access. Then, my trouble is how to make it configurable to point to a certain database with the same connection string name but different connection string value depending on the user who has logged in, in order to not modify the current code I did. The only work I must do is change LogIn page to select appropiate database to access.
I've taken over work for the custom forums that a previous developer created at my job, and came across a minor bug. We don't allow animated GIFs as avatars in the forums. However, if someone were to take an animated GIF, rename it to imagename.jpeg, and then upload it, the forums will show the image as being animated.
It's a very odd bug as I didn't even think it played the animation if the extension wasn't .gif.
So my question is: Is there a way to check (in .NET 2.0) if an image is an animated gif, even if the extension isn't?
I got a variable of type System.Drawing.Image and need to convert it to a variable of type byte so I can store the image in the database. Can someone show me how to do that in VB.NET code.
i have 2 tables assignment and feedback, in a gridview it displays all the assignments, the assignments then get feedback. im then wanting to change the view feedback button in the gridview depending on if there is new feedback for example:
the feedback table has a state field in it so when its 1 i want that image button to change to the one with the +
I have a gridview which displays rows and columns all linked to an sql statement... and all works as normal.
I want to include a new column, that displays an image depending on what the value of the column is. If the column has a value - it will display an image. If the column value is null no image whill be displayed.
My sql is something like:
SELECT c.call_id, title, a.call_id as b_attach FROM calls c LEFT JOIN attachments a ON c.call_id = a.call_id GROUP BY c.call_id,title,description, a.call_id
What's returns from this sql is:
Call_id | title | b_attach 1235 | title goes here | 1235 1382 | another title |NULL
So if there's something in b_attach - diplay image in gridview column, else display nothing in gridview column
We have encountered this difference in file creation while using a HttpHandler Versus a Code Behind Aspx page. We are reading a saved jpg/png picture as byte array from a 'Image' field in sql server database and create a physical file in the server. Both the Aspx Page and Httphandler use the same code pasted below.
//Begin int docID = Convert.ToInt32(Request.QueryString["DocID"]); var docRow = documentDB.GetDocument(docID); // Retrieve the physical directory path for the Uploads subdirectory string destDir = Server.MapPath("../../Uploads").ToString() + "\"; string strFileName = destDir + DateTime.Now.ToFileTime() + "_" + docRow.DocName.ToString(); FileStream fs = new FileStream(strFileName, FileMode.CreateNew, FileAccess.Write); fs.Write(docRow.DocData, 0, docRow.DocData.Length); fs.Flush(); fs.Close(); // End
After the file is created, it is viewable as a jpg/png Image only in Aspx Code Behind. While in case of HttpHandler it is not a valid Image.
I'm trying to change an image's imageurl on an aspx asp.net c# page based on a variable from #var=1` (or 2, or 3, or 4)
I know nothing about javascript unfortunately which is what I've been told I need. Can anyone point me at a novice based script I can try to learn via implementation?
I would like to store a collection of strings in the web.config. This collection would vary in size over time. I would like to be able to pull all of the strings in the collection into an array or collection in code. (.Net 4, asp.net) i.e.
I could use appsettings with the strings all in one value but I would like to seperate it out for organizational reasons. Not using the key/value pair complicates things a bit. I am now getting a message that states "you can't have duplicate elements in a section"
I have an asp.net 2.0 website. I have an appsetting in the web.config to point to which environment I am in (Dev, QA, Production). Each environment has it's own web reference for calling web services to get data.I currently have all 3 web references added to the project at the same time and manually change the name of the current environment I want to use. Is there a way I can use the appsetting environment variable I have setup to decide which web reference to use? Does anybody have an example or can point me in the right direction to get started?
the following web.config file is placed in a specific sub-folder on a website. It will allow the user John.Doe to access the pages inside the folder but will deny anonymous users
Is it possible to replace users in the following web.config file with certain session variable for example getting the day(sunday, monday, etc) from date and storing it in session("DayVar")
then the code should be something like this for the subfolder monday
I have a gridview and would like to display one of 5 icons depending on the value returned from the database for that row (simply just A, B, C, D or E). Which event in my datagrid should I be looking at to check what value I'm getting? I presume once I can check a value I can simply set an image source using if statements?
I've got a variable that holds html for the body text in a cms I'm working on. I want to extract all image src tags from the variable so I can display these images.
Is there a way how to capture only the picture from webcam and store that image into the variable. But i dont want to use silerlight nor flash.But if is not possible then i do need the step how to use in flash. I dont need good quality.
