File Upload - Security Risks Or Concerns With The Use Of FileUpload Control?
Feb 11, 2011
I have to create a utility through which user can able to upload singh or multiple files with the use of asp.net FileUpload Server control.
I am looking for Security concern for the same. What are the points need to keep in our minds which violate security. One main issue is in my mind is related to Viruses - means
How to prompt user for viruses and terminate the upload operation How to scan files for viruses during upload operation There may be several Security risks. discuss the issues/risks with proposed solutions.
I am planning to create a web page with the name of the student, course,pic and the resume to be uploaded by the user for specified students...
If I upload the resumes of students with same name how to differentiate. Looking for creating a name of the file name randomly as next I'm planning to retrieve the resume via search function to download and view the resumes....
Saving the resumes with same name with differentiate or randomly to save the files with new file name....
I am working on a project, in which I need to upload the .swf file by using ASP.Net fileupload control. But, when I click upload button, it doesn't work even not arises any related error, but "Internet Explorer cannot display the webpage" this error arise which is not related to by problem. While, instead of .swf file, when I tried to upload .doc, .txt, it uploads without any error.
I have a user control in which i am using File upload control for uploading file.
I have used ModelPopExtender here for showing it in popup.
I am using javascript function for full PostBack. In Javascript function, i am using __doPostBack for PostBack. It is working fine when i use this control in aspx page.
Problem occurs when i use this user control in another user control. It does not find javascript function.
In my ASP.NET project, I want to add a facility to my page so that when the user clicks a button, a 'browse file' dialog box directly opens up. After he selects the file in the dialog box, I want to save that image on the server, and update an imagebox based on that selection.
Is there some sort of dynamic 'browse for file' type dialog box that I can use?
My application allows a user to upload a file using the FileUpload control. The data contained in the uploaded file is then displayed to the user in a Grid for review if certain field validation criteria is met otherwise, a message is displayed stating that invalid data was encountered. If the data displayed is satisfactory, they have a 'Process Data' button to add the data to the system.
Initially, I used a simple If/Else block to determine if there was a file selected or not and if not, display a message to the user. As the coding got more complicated, this stopped working and I was told to use the RequiredFieldValidator control instead to get around the issues that arose.Now, I have a new issue: after the uploaded file data passes field criteria validation, the FileUpload box is cleared automatically and so when the user clicks the 'Process Data' button, the VC throws a message stating that the file name is missing from the FileUpload box.
I want to upload file at client machine using fileupload control. How can I do this in asp.net.. Currently I am using the following code to upload a file. but this code gives the contents of file at server machine..
I need the full file path..In IE versions higher than 7, FileUploadControl.PostedFile.FileName gives only the filename ..
string filename = FileUploadControl.PostedFile.FileName; sr1 = new StreamReader(FileUploadControl.PostedFile.FileName);
I have a file upload control in which i want to restricr the users not to upload more than 1mb file. Is it possible using custom validator or any other code. I want to raise validation before any postback happends.
My project is running with VSS..I have it's IP Address to connect it. There is a folder "DataShare" in VSS for my project. My task is, i need to upload a document(*.doc) from my Local drive to VSS Folder "DataShare" with FileUpload Control How should i do this?
I am using the fileupload control for file upload on flickr from myapplication.using Fileupload control, How can i get the upload file physical path(local system file path).
here i define if (fup1.PostedFile.ContentLength < 102400) this size for image but when i upload image that has more than this 100KB it show error ===File size of 756 KB is exceeding the uploading limit but it upload file i don't want users can upload file morethan 100KB but here show error but upload image why?
I use aspFileUpload server control to upload files in my web site. Every things work properly. But when my web site run from iis server, I can't upload files and The error is appear: The access denied. If i set modify permision to Everyone group i can upload file but i can't delete it from my web site.
I have used a FileUpload control in my web page. Now I want that when the textbox of the control is blank (i.e no file name mentioned), the upload button should be disabled. Only after the some file name is mentioned, the buttong should get enabled.
[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.
I want to know how to upload local file to google drive without using file upload or html input file control.. i have file path and other information. I am using web application and vb language...
For some reason, I'm unable to upload a file with the <asp:FileUpload /> control. I know it's not just something completely pooched, because I created a new project with this code in it and that uploaded the file.My code looks like this (some bits removed...):
I have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?
