I have a ASP.NET (.NET Framework 3.5) Application. Now, I have to place a Button on a aspx-Page with the fallowing functionality on click:
Ask the user for a file with Extension xls (OpenFileDialog)
Upload the selected file to a specific folder on the WebServer
How can I do this?
Thanks for your help.
Here is the code that can be used for file upload after checking certain file types.
protected void Upload_File() {
bool correctExtension = false;
if (FileUpload1.HasFile) {
string fileName = FileUpload1.PostedFile.FileName;
string fileExtension = Path.GetExtension(fileName).ToLower();
string[] extensionsAllowed = {".xls", ".docx", ".txt"};
for (int i = 0; i < extensionsAllowed.Length; i++) {
if (fileExtension == extensionsAllowed[i]) {
correctExtension = true;
}
}
if (correctExtension) {
try {
string fileSavePath = Server.MapPath("~/Files/");
FileUpload1.PostedFile.SaveAs(fileSavePath + fileName);
Label1.Text = "File successfully uploaded";
}
catch (Exception ex) {
Label1.Text = "Unable to upload file";
}
}
else {
Label1.Text = "File extension " + fileExtension + " is not allowed";
}
}
}
You should start with the ASP.NET FileUpload control. Here is a pretty good tutorial on how to complete this task.
Related
I'm trying to upload a file using FileUpload, and it doesn't work. After I click the button, it reloads the page, but the image is not saved
Below code is from microsoft, but still not working
protected void uploadBtn_Click(object sender, EventArgs e)
{
Boolean fileOK = false;
String path = Server.MapPath("~/Sources/images/");
if (imageUpload.HasFile)
{
String fileExtension =
System.IO.Path.GetExtension(imageUpload.FileName).ToLower();
String[] allowedExtensions = { ".gif", ".png", ".jpeg", ".jpg" };
for (int i = 0; i < allowedExtensions.Length; i++)
{
if (fileExtension == allowedExtensions[i])
{
fileOK = true;
}
}
}
if (fileOK)
{
try
{
imageUpload.PostedFile.SaveAs(path
+ imageUpload.FileName);
statusUploadLbl.Text = "File uploaded!";
}
catch (Exception ex)
{
statusUploadLbl.Text = "File could not be uploaded.";
}
}
else
{
statusUploadLbl.Text = "Cannot accept files of this type.";
}
}
Please help, thanks
This is my code:
if (FileUpload1.HasFile)
{
try
{
string file_name = Path.GetFileName(FileUpload1.FileName);
FileUpload1.SaveAs(Server.MapPath("~/FoodImage/1/") + file_name);
Label1.Text = "File Upload";
}
catch(Exception)
{
Label1.Text = "Can not Upload File!";
}
}
that code browse the for example "logo.jpg" and save in my server,but i want before to save change the file name,for example Browse button press and choose "logo.jpg" and click open then change the main file name "logo.jpg" to "L1.jpg" and save.
Try this:
//Check if user has selected a file and the file size is not 0
if (FileUpload1.HasFile && FileUpload1.PostedFile.ContentLength > 0)
{
//Set the name you want for the file with no file extension
string newFilename = "L1";
//Get the file extension of the file being uploaded.
string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
//Combine the new filename and the extension. You want to make sure it's the same file extension.
string updatedFilename = newFilename + fileExtension;
//Set the upload location
string SaveLocation = Server.MapPath("~/FoodImage/1/");
bool hasErrors = false;
try
{
//Save the file to location with new filename
FileUpload1.SaveAs(Path.Combine(SaveLocation + updatedFilename));
hasErrors = false;
}
catch (Exception ex)
{
//Display error if any
lblUploadStatus.Text = "Error uploading file. " + ex.Message.ToString();
lblUploadStatus.ForeColor = System.Drawing.Color.Red;
lblUploadStatus.Visible = true;
hasErrors = true;
}
finally
{
//Do something or display success or failure
if (hasErrors == false)
{
lblUploadStatus.Text = "File sucessfully uploaded with new filename: " + updatedFilename;
lblUploadStatus.ForeColor = System.Drawing.Color.Green;
lblUploadStatus.Visible = true;
}
}
}
asp:FileUpload gets rendered as input type="file" and it does not have that option. You can however do this simple workaround. That is, place a textbox below the FileUpload and prompt the user to enter the desired file name there.
The asp.net upload control is uploading the file for first time in Ipad but not after that and not even showing any error
The code is as below
protected void UploadThisFile(FileUpload upload)
{
try
{
string folderpath = ConfigurationManager.AppSettings["BTCommDynamic"].ToString() + ConfigurationManager.AppSettings["Attachments"].ToString();
Guid fileguid = Guid.NewGuid();
string filename = fileguid + upload.FileName;
if (upload.HasFile && dtFiles != null)
{
DataRow drFileRow = dtFiles.NewRow();
drFileRow["FileName"] = upload.FileName;
string theFileName = Path.Combine(Server.MapPath(folderpath), filename);
string theFileName1 = Path.Combine(folderpath, filename);
//string theFileName = folderpath;
//to save the file in specified path
upload.SaveAs(theFileName);
drFileRow["FilePath"] = theFileName1;
double Filesize = (upload.FileContent.Length);
if (Filesize > 1024)
{
drFileRow["FileSize"] = (upload.FileContent.Length / 1024).ToString() + " KB";
}
else
{
drFileRow["FileSize"] = (upload.FileContent.Length).ToString() + " Bytes";
}
dtFiles.Rows.Add(drFileRow);
gvAttachment.DataSource = dtFiles;
gvAttachment.DataBind();
}
}
catch (Exception ex)
{
string message = Utility.GetExceptionMessage(ex.GetType().ToString(), ex.Message);
Display_Message(message);
}
}
Do you use firebug? There might be an error on a client side that prevents the work of your functionality.
Do you have any logic on your client side? Some kinda jquery/ajax calls?
I am developing a complaint form. In this this form, I must make a function that uploads a file and then delete the file that was uploaded. I can upload a file to the server, but I can't take a link of the file I upload to the server in order to delete it. Please help me. Here is my code:
public string FilePath;
protected void btAdd_Click(object sender, EventArgs e)
{
if (AttachFile.HasFile)
{
try
{
string[] sizes = {"B", "KB", "MB", "GB"};
double sizeinbytes = AttachFile.FileBytes.Length;
string filename = Path.GetFileNameWithoutExtension(AttachFile.FileName);
string fileextension = Path.GetExtension(AttachFile.FileName);
int order = 0;
while (sizeinbytes >= 1024 && order + 1 < sizes.Length)
{
order++;
sizeinbytes = sizeinbytes/1024;
}
string result = String.Format("{0:0.##} {1}", sizeinbytes, sizes[order]);
string encryptionFileName = EncrytionString(10);
FilePath = "Path" + encryptionFileName.Trim() + AttachFile.FileName.Trim();
AttachFile.SaveAs(FilePath);
}
catch (Exception ex)
{
lbMessage.Visible = true;
lbMessage.Text = ex.Message;
}
}
}
protected void btDelete_Click(object sender, EventArgs e)
{
try
{
File file = new FileInfo(FilePath);
if (file.Exists)
{
File.Delete(FilePath);
}
}
catch (FileNotFoundException fe)
{
lbMessage.Text = fe.Message;
}
catch (Exception ex)
{
lbMessage.Text = ex.Message;
}
}
Each request in asp.net creates a new object of your Page.
If you set variables during one request, they will not be available on the next request.
Your delete logic seems to depend upon FilePath being set during upload. If you want the page to remember that, keep it in the ViewState. The ViewState is maintained across requests to the same page and that would allow you to use the variable FilePath during delete.
This can be easily achieved by making FilePath a property and getting it from the ViewState.
public string FilePath
{
get
{
return (string) ViewState["FilePath"];
}
set
{
ViewState["FilePath"] = value;
}
}
YOU SHOULD DO IT IN THIS WAY.
if (imgUpload.HasFile)
{
String strFileName = imgUpload.PostedFile.FileName;
imgUpload.PostedFile.SaveAs(Server.MapPath("\\DesktopModules\\Indies\\FormPost\\img\\") + strFileName);
SqlCommand cmd01 = new SqlCommand("insert into img (FeaturedImg) Values (#img)", cn01);
cmd01.Parameters.AddWithValue("#img", ("\\DesktopModules\\Indies\\FormPost\\img\\") + strFileName);
}
With this code you can upload file in a particular location in your sites root directory.
and the path will be stored in database as string.
so you can access the file just by using the path stored in database.
If you cant understand anything. or wanna know more u can contact me or ask me here in comments.
im using following code to upload
protected void UploadButton_Click(object sender, EventArgs e)
{
if(FileUploadControl.HasFile)
{
try
{
string filename = Path.GetFileName(FileUploadControl.FileName);
FileUploadControl.SaveAs(Server.MapPath("~upload/") + filename);
StatusLabel.Text = "Upload status: File uploaded!";
}
catch(Exception ex)
{
StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message;
}
}
}
I want to change the upload file name...I have to assign file name for every uploaded file how?
This line pickes up the the name of the uploaded file:
string filename = Path.GetFileName(FileUploadControl.FileName);
This line tells the server what to save the file as:
FileUploadControl.SaveAs(Server.MapPath("~/") + filename);
Simply change the value of filename to something else before saving.
there is a way to change the name of the file that we downloaded to our "~Server/Userfolder"(as an example)..
i was really thinking on renaming file before the .SaveAs command, which is gonna be like:
if (Request.Files != null)
{
var getmyfile = Request.Files["some_photo"];
try
{
if (getmyfile.FileName != "" && getmyfile.FileName != null && getmyfile.ContentLength > 0)
{
///Create Useruploads path.
var path = Server.MapPath("~/Useruploads" + "\\");
///Get file info that we gonna upload to server..
FileInfo TheFile = new FileInfo(path + Path.GetFileName(getmyfile.FileName));
///Note: i used Path.GetFileName(getmyfile.FileName) code cause getmyfile.FileName gives full path of that file..
if (TheFile.Exists)
{
///Seperate file name and extention..
var fname = Path.GetFileNameWithoutExtension(TheFile.Name);
var ext = TheFile.Extension;
var path2 = path + fname;
///As long as we got file names, same as in server..
while(new FileInfo(path2+ext).Exists)
{
///Add "-img" to its name..
path2 = path2 + "-img";
}
FileInfo ccc = new FileInfo(path2 + ext);
string f_art = ccc.Name.Replace(" ", "");///Clean space.. (Optional)
getmyfile.SaveAs(f_art);
somedb.some_photo = Path.GetFileName(f_art); ///Its not fart its file art lol!
}
else ///if file is not exist in our server..
{
var path3 = (path + Path.GetFileName(getmyfile.FileName));
FileInfo ccc = new FileInfo(path3);
string f_art = ccc.Name.Replace(" ", "");
getmyfile.SaveAs(f_art);
some.some_photo = Path.GetFileName(f_art);
}
}
}
catch(FileNotFoundException ex)
{
form.Set("lblStatus",ex.Message);
}
catch (Exception ex)
{
form.Set("lblStatus", ex.Message);
}
db.somedbs.InsertOnSubmit(somedb);
db.SubmitChanges();
return RedirectToAction("Index");
}
(Optional) Also u can use :
var f_art = System.Text.RegularExpressions.Regex.Replace(Path.GetFileNameWithoutExtension(TheFile.Name), "[^a-zA-Z]", "");
instead of using .Replace(" ",""); but at this it just cleans spaced areas and if u use the code up there its gonna clean everything except A to Z , a to z characters which means no numbers will be applied to that name nor space or other characters which are not between A and Z..