Am developing asp .Net web application.
In one of my aspx file am using file to download using generic handler. Everything works great. But when am testing i felt a strange problem. That, if am uploading a image or document with file name containing aspx character for Eg; aspxphoto as file name.
Uploading doesnt have any any problem but when i try to download it is throwing error in Generic handler file as
Object reference not set to an instance of an object.
Can anyone help me why this problem happends and how can i fix it?
You will not be able to do this. The IIS handler wants to "handle" the ASPX. You should simply not allow it, or if you have to, rename it to .aspx.uploaded or something. If you allowed, it you could open yourself to hacking.
As another option, you may be able to create a virtual that implements ("no processing") - possibly using the HTTP Handler under the virtual and just disabling script / execute permissions (under handler >> Edit Feature Permission >> Script OR under Virtual >> Edit permissions >> Special >> Turn Execute off.
I would not recommend the last, since it will add complexity when migrating between test and live AND for recovery (DR).
Related
In my asp.net web application, I read the xml file for obtaining a key. If file is not present I show a form to enter the key details and then create the file.
First problem: My app does not recognize the file even if its there.
Second problem: I am running application on the server. When writing, rather overwriting the file, browser shows the username, password prompt before writing the file. If I enter admin credentials it allows to create a file.
I have checked all possible combinations of permissions on the file / folders, but could not resolve the problem.
Any ideas, what I could be missing here?
You read the xml file but is it as a part of your solution? If yes, are you reading it through relative path i.e. are you using Server.MapPath to read it like Server.MapPath("~/Files.test.xml")? Once you use relative path, I don't think it will ask you credentials as it still is in your project directory.
It should work. I am also reading and writing files in my web application.
If it still does not work, please tell me the way you are reading file.
Thanks,
I have a grid view on page. When i click on a select button of grid view. I am getting an exception like this
Error Message: Access to the path 'c:\windows\system32\inetsrv\19.xml' is denied.
here 19 is the id of the record in the grid view.
Actually it was working fine till yesterday. but suddenly raised the exception.
Every thing here is done by a web service.Web service works fine on all pages but only on one page.The exception is raises only on production system not on development system
It is occurring on only one page. How to resolve this.
Check your create/write/reading rights on the folder the xml is in.
Your application pool identity probably does not have the appropriate rights to create/modify/open the file, causing this error to occur.
Please check the security settings and see if that fixes the error.
You need to use Server.MapPath if xml documents are located under the root of web-app.
string value="19.xml";
string file=Server.MapPath("~/folder/" + value);
...
Try to move your XML data to a DataTable.. hence remove neediness to access directly your file. When everything is done simply save back your changes into the respective xml file.
I'm working on an ASP.NET web application for our corporate intranet users. I have a form where a user should provide a path to the file on the local network (something like "\localServer\someFolder\someFile.ext") without uploading the actual file. The issue is that users don't want to type the whole file path and want to use some kind of visual browse dialog.
The standard HTML <input type=file> element allows to browse for a file, but most of the browsers (except for IE) don't allow to access file's full path, so I think it should be done by some external component like Silverlight, Flash, Java applet etc.
I tried to do it with Silverlight, but I'm getting a SecurityException when trying to access file's full path using Silverlight's OpenFileDialog class.
This java applet http://jumploader.com/demo_images.html seems to do something similar to what I'm looking for, but it's focused on uploading files - I only need to be able to get file's full path and pass it to the server as a string.
Any suggestions would be appreciated.
Telerik ASP.NET AJAX RadFileExplorer has the functionality you're looking for:
http://www.telerik.com/products/aspnet-ajax/fileexplorer.aspx
You can use their Custom File Content Provider to hook the GUI to your server's file system.
http://demos.telerik.com/aspnet-ajax/fileexplorer/examples/server-sideapi/dbfilebrowsercontentprovider/defaultcs.aspx
This should be possible with Flash's uploading capabilities. SWFUpload has an API that you may be able to access from JavaScript to extract the selected file name without actually uploading anything. See docs here, for example getFile():
getFile is used to retrieve a File Object from the queue. The file retrieved by passing in a file id (the id property from a file object) or a file index (the index property from a file object).
So, I've created my wonderful winforms app that I want to unleash upon the world, and now I am trying to create a simple website to host some basic information and link to the setup file (msi installer file )....
I have a button on the asp.net page and the setup file setupApp.msi in same folder as the asp.net page. I am currently trying the following:
Response.Redirect("http://./SetupApp.msi");
But this best guess at what to do is not working. Is there something wrong with Mime types here? What do I need to put in the click event to allow users to download this file?
The path you are passing in to the method is not valid (there's no server name called ".").
You can pass in a relative path and it should work fine because ASP.NET will resolve the path:
Response.Redirect("SetupApp.msi")
Or if it's not in the same folder, try one of these:
Response.Redirect("../Downloads/SetupApp.msi")
Response.Redirect("~/SomeFolder/SetupApp.msi")
Keep in mind that you don't necessarily have to do the whole redirect at all. Instead of writing code in an ASPX file you could just have a link to your MSI:
Download my app!
I'm receiving "culture name 'uploads' is not supported" when my ASP.NET application start. Where do I have to view/debug to toggle the error?
A full-text search for "uploads" returns 0 entries in my project.
I've deleted this folder and it solved the problem:
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\8dfb04ef\44bf70fb\uploads
Do not worry, it is not a real error.
When the runtime tries to find which resource assemblies exists, it tries to enumerate folders where compiled DLL files reside. It assumes the name of the folder is the culture name, so it tries to create a culture for it. Unfortunately uploads is a folder which is created automatically by ASP.NET, and it is obviously not a culture :).
The runtime ignores some predefined folders like "hash", but not "uploads". So we have to live with it.
I am getting the exact same error. ["culture name 'uploads' is not supported"]. I do not know what is causing it but I've been able to get around it by clicking [Debug|Exceptions (Ctrl-alt-E) and un-checking "Common Language Runtime Exceptions". I do not have an 'uploads' folder or file in my project and there is nothing in my project that has anything to do with multilingual support and the error fires right off the bat when I run my project ... looking at the call stack just walks me through a whole lot of mscorlib calls. I have no clue why it's even getting called.
JumpingLethalRampage, instead of unchecking all "Commong Language Runtime Exceptions," you could uncheck just "Common Language Runtime Exceptions > System > System.ArgumentException." You don't need to uncheck all CLR items.
It sounds like maybe you have some code somewhere that is trying to set the culture based on a URL pattern (this may be tracked down if it is possible to get a stack trace). For example, sometimes I'll set up multi-lingual sites with URLs like this:
http://www.example.com/en-US/
http://www.example.com/es-MX/
I'll then have code in my base page that looks at the URL and attempts to set the culture based on the URL path. But if you tried to hit a URL like:
http://www.example.com/uploads
It would fail with an error like what you are seeing if you just blindly take the first path element and try to use it as the culture without checking it first.
If the application is it built upon DotNetNuke (and not a simple ASP.NET application), this kind of error generally occurs in DotNetNuke due to the issue described in Culture name '__page' is not supported.
If you are not using DotNetNuke, check your Application_Start code (in the Global.asax file). It might be setting the CultureInfo. Or check your web.config file for any invalid culture values.
Assuming that your search through the project wasn't restrictive (widest possible search in all files), then my guess would be that your browser has a User language set to a custom string - "uploads".
In IE, you can check via Tools -> Options -> Languages -> Add -> User defined language.