Scan Files During Uploads With Use Of FileUpload Server Control
Feb 11, 2011
In continuation to my previous research at this link : Security Risks or concerns with the use of FileUpload control of asp.net - how to Scan files during upload, also how to intimate user if file is virus affected and abort the operation. In addition to above, we have McAfee Antivirus installed on our servers. I heard that there is some APIS for this work for Symantac Antivirus but I am not sure about McAfee antivirus.
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Feb 23, 2011
I'm trying to use an asp:FileUpload Control to allow users to upload files (.doc, .gif, .xls, .jpg) to a server that is outside of our DMZ and not the Web Server. We want to have the ability to look at these files for viruses, structure, etc prior to saving them into another directory that would allow access to outside users. From what I have read about this control is that it will allow for files to be uploaded to the web server. Can this control be used to upload files to a server other than the web server? If it can be done where should I look for this type of functionality or how do I force it to go to https:servernamefolder name (Where server name is not the web server)? Would I have to read the file then write it to the other server?
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May 7, 2015
I have fileupload control in my page below is code
protected void BtnUpload3Img_Click(object sender, EventArgs e)
{
uploadImageError.Visible = true;
if (fup3.HasFile && fup3.PostedFile.ContentLength < 102400)
{
string path = Server.MapPath("~/image/House/product/");
string fileName = System.IO.Path.GetFileName(fup3.PostedFile.FileName)
[Code]......
when I select image and upload it and after that refresh page it again upload image that I upload with fileuoploadcontrol before...
I want when I upload image with fileuploadcontrol and refresh page it doesn't upload image again...
how I can do it?
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Feb 17, 2011
How to get data (read file) chosen in FileUpload control without FileUpload.SaveAs Method on the server? Is it possible write it at once to some object?
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Jul 3, 2010
We have a file upload feature in one of our websites developed in ASP.NET and C#.NET. We would like to scan the files for viruses automatically before they are being uploaded into our server. We are using AVG server edition on our server. How can we enable this feature.
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Feb 19, 2011
write a script in Visual Basic.
i want to be able to scan a folder and its sub directories for all the files that exist in it. the results are then feed into a list box or any similar control
additional it would be great if the results are entered and also its path
eg:
File1 C:folder1folder2file1.exe
File2 C:folder1folder2dd.dll
File3 C:folder1explorer.exe
File4 C:folder1folder2folder3document.docx
File5 C:folder1
eadme.txt
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Nov 17, 2010
We are using HttpPostedFileBase to upload files to our asp.net mvc application. Is there some smart way of analyzing the contents of the file to determine the actual mime type by looking at the actual binary stream?
I want to make sure no .exe files or similar stuff are uploaded, just want to accept a number of files.
Something like a preflight on the file that is uploaded to extract information programmatically and determine the file type.
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Dec 23, 2010
I have developed a web based application in ASP.NET and C# where users have the facility to upload files on the server through this application I want the application to Scan the uploaded files for viruses before saving on the server. Same like when we attach files with our email in Yahoo. Any API which can be integrated in ASP.NET application or any other way you can suggest. We can purchase the licensed version of a product which can achieve this.
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Jan 15, 2010
Can I upload files without having a fileupload control? I was looking at the HttpFileCollection class, but I believe that only works with the fileupload control.
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Nov 30, 2010
I have a site that needs the ability to upload image files. I copied this code from the Microsoft Website:
<%@ Page Language="C#" %>
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
try
{
FileUpload1.SaveAs("C:\Uploads\" +
FileUpload1.FileName);
Label1.Text = "File name: " +
FileUpload1.PostedFile.FileName + "<br>" +
FileUpload1.PostedFile.ContentLength + " kb<br>" +
"Content type: " +
FileUpload1.PostedFile.ContentType;
}
catch (Exception ex)
{
Label1.Text = "ERROR: " + ex.Message.ToString();
}
else
{
Label1.Text = "You have not specified a file.";
}
}
</script>..........................
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Jun 22, 2010
I'm testing a very simple aspx page on Visual Studio's own ASP.NET Development Server(the local server). On the webpage there is a FileUpload control which can upload jpg file up to 2MB without problems. On uploading bigger files, the browser immidiately show "The web page cannot be displayed". It does not show any exception which really puzzles me. "The web page cannot be displayed" is normally caused by network problem, but in this case it's a local server and it can handle smaller jpg file fine. Whta's the problem here?
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Sep 22, 2010
We need to upload multiple files using ASP.Net in one go. One option is to use the ASP.Net FileUpload control but it seems that it can't upload multiple files in one go. Any other option or ASP.Net FileUpload control can do multiple uploads in one go with some tuning?
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Apr 4, 2011
In my website,I have a home page in which by clicking on an image button,I get redirected to a different .apsx page .This page consists of a FileUpload control and 2 buttons(ATTACH,CANCEL).When a user selects/browses a file from his local machine and click ATTACH button,I display that file in a GRIDVIEW and also push the details of that file like Filename into a DATATABLE. The user in this way can browse multiple files and all of them are added to GridView and also pushed to DATATABLE.Now when the user clickes CANCEL button,I am sending the whole DATATABLE in a session object to the HOME page.Upon clicking SAVE button in the home page,the files in the DATATABLE must get stored in a physical location that I mention in the code. The problem that I am facing is that when I write
FileUpload fl=new FileUpload;
fl.SaveAs(dt["fileName"]);
The files are not at all getting saved in the location. However If I pass the FileUpload control using Session from the second page,
FileUpload fl=(FileUpload)Session["FileUpload"]
The files are getting saved with the correct filenames but the content of all the files consists of the content of the latest uploaded file.I know what the problem is but unable to get a solution. My Requirement is to save the files in a physical path only after clicking the Save button in the home page.
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May 18, 2012
I use file upload control.........and below this there is upload button which include programming to upload file.........
It is working fine for file size of less than 2mb but when i pick file of 5 mb(say) and i click on file upload button or any other button then outcome is
Internet Explorer cannot display the webpage
I placed break point on upload button but control doesn't go their..........
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Jul 28, 2013
I have a webpage where by user can upload jpg file through browse control on my server. Functionality working fine.
I have concern that if any one create virus and assemble it in a form of jpg and upload it on my server which can crash the hard disk or any other disaster.
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Jun 16, 2015
the first file selected uploads perfectly - every subsequent file is 0bytes. The code for the upload button is presented below.
Protected Sub cmdUpload_Click(sender As Object, e As EventArgs) Handles cmdUpload.Click
Dim hfc As HttpFileCollection = Request.Files
For i As Integer = 0 To hfc.Count - 1
If i < 9 Then team = "/Team0" & i + 1 & "/"
If i > 8 Then team = "/Team" & i + 1 & "/"
Dim myFtpWebRequest As FtpWebRequest
[code]....
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May 7, 2015
I had implemented FileUpload code. In which for every particular Id, it creates Folder/Directory (if not exist) on Page _load.Then inside that particular Id's folder it will upload single or multiple files.
HTML:
<asp:Label ID="LFileUpload" runat="server" Text="Upload File"></asp:Label>
<asp:FileUpload ID="FileUpload1" runat="server" Width="300px" AllowMultiple="true"/>
<asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="UploadFile" ValidationGroup="none"/>
<asp:Label ID="LMsg" runat="server" Text="" Visible="false"></asp:Label>
[CODE]...
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Oct 24, 2010
I am experiencing the following page error when trying to use the FileUpload control on my web page to upload files larger than 3MB or so. The error is as follows:"Problem loading page The connection was reset The connection to the server was reset while the page was loading.
* The site could be temporarily unavailable or too busy. Try again in a few moments.
* If you are unable to load any pages, check your computer's network connection.
* If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web."I suspect this may be due to a timout issue. If so, how can I increase the timeout period for this control / process? I am coding in VB.NET.
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Feb 18, 2010
Please help to understand this RegEx statement in details. It's supposed to validate filename from ASP.Net FileUpload control to allow only jpeg and gif files. It was designed by somebody else and I do not completely understand it. It works fine in Internet Explorer 7.0 but not in Firefox 3.6.
<asp:RegularExpressionValidator id="FileUpLoadValidator" runat="server"
ErrorMessage="Upload Jpegs and Gifs only."
ValidationExpression="^(([a-zA-Z]:)|(\{2}w+)$?)(\(w[w].*))(.jpg|.JPG|.gif|.GIF)$"
ControlToValidate="LogoFileUpload">
</asp:RegularExpressionValidator>
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May 7, 2015
[URL] .... I am referring to the link given mentioned above, i want to save image details into database of each file, if i select two files i want to save filename in database in each row. ist file in 1 row , second file in next row with file name.
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Mar 4, 2011
Is there any difference between accessing a property that has a backing field
private int _id;
public int Id
{
get { return _id; }
set { _id = value; }
}
versus an auto-property?
public int Id { get; set; }
The reason I'm asking is that when letting ReSharper convert a property into an auto property it seems to scan my entire solution, or at least all aspx-files.
I can't see any reason why there should be any difference between the two from outside the class. Is there?
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Feb 16, 2010
I recently embarked on the endeavor of creating my own asynchronous file upload components for ASP.NET. I took lessons learned form Darren Johnstone's FileUpload project and created an HttpModule for extracting the files from the submitted data.
I got everything working as it should in testing with VS 2008 using the Development Server. I even went so far during my testing to ensure that the request was being intercepted by the module before the files began uploading. After I was satisfied with things, I deployed the project to our web server (Win 2008 w/ IIS 7). I was horrified to learn that the controls were not functioning when deployed.
After some remote debugging, I found that the HttpApplication.AuthenticateRequest event (my location for hooking in to the process) was not being invoked until the files were completely uploaded.
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Feb 14, 2010
i'm developing a web application using asp.net 3.5 sp1, my issue is , i need to upload multiple files asynchronously.
for that i used the ajax control toolkit "async file upload", where i can only upload single file and cannot track the filenames after uploading, so i go for the "file uploaded ajax"
[URL]
when i started including the cascading dropdown in that page("mainpage.aspx") , an error occured in the page, ie; when i click add files of the "file upload ajax", the "file upload" control some times doesnot show, so i created another page("testpage.aspx") and included the "file upload" control in that page and created an iframe in the "mainpage.aspx" and call the "testpage.aspx", now it is working fine, but i was not able to track the filename, can i access the control inside that iframe from the "mainpage.aspx" ?
mainpage.aspx
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<form id="form1" runat="server" enctype="multipart/form-data">
<ajaxToolkit:ToolkitScriptManager EnablePartialRendering="true" runat="server" ID="ScriptManager1" />
<div>
[Code]....
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May 7, 2010
I need a basic system that uploads a file to the server and stores the details in a database, with the ability to add/ edit/ delete whats there.
Most of the solutions I've seen have been far to indepth. I'd like something very simple so I can pick it apart and modify it.
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Aug 31, 2010
I m getting a problem while executing the following code for my website.
This code works perfactly on localhost but when I use d same code on my webpage on the server it does nothing...even it doesnt return any error msg.
[code]....
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