I have 2 pages send.aspx and recive.aspx.
In send.aspx, I have FileUpload and Button that send selected file to recive.aspx page.
In below you can see recive.aspx.cs code in Page_Load
at the end .
How can I send file to this page?
protected void Page_Load(object sender, EventArgs e)
{
string action = Request.Params["action"];
if (action == null)
{
Response.StatusCode = 400;
Response.End();
}
if (action.Equals("upload"))
{
HttpPostedFile file = Request.Files["file"];
if (file != null && file.ContentLength > 0)
{
//string guid = Guid.NewGuid().ToString();
string ext = Path.GetExtension(file.FileName);
//2- Get and check file extension
string[] validExtesions = { ".e", ".jpg", ".gif", ".png", ".rar",
".zip",".3gp",".3gpp",".mp4",".mov",".wmv",".avi", "",".jpeg", ".mp3", ".ogg"};
if (Array.IndexOf(validExtesions, ext.ToLower()) < 0)
{
Response.Write("Invalid file extension!");
Response.End();
}
//3- Get and check file size
long fileSize = file.ContentLength;
fileSize /= 1024;
if (fileSize > 2048000)
{
Response.Write("Fiele size must be < 2GB");
Response.End();
}
//4- Get file name
string fileName = Path.GetFileName(file.FileName);
//5- Check file exist and if (true) generate new name
while (File.Exists(Path.Combine(UploadFolder, fileName)))
fileName = "1" + fileName;
string fname = fileName;
string path = Server.MapPath(Path.Combine(UploadFolder, fname));
file.SaveAs(path);
Response.Write(fname);
Response.End();
}
else
{
Response.StatusCode = 400;
Response.End();
}
}
}
I need to create a folder within another folder(total 2 folders), in that I need to insert the image.
protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
AjaxControlToolkit.AsyncFileUpload async = (AjaxControlToolkit.AsyncFileUpload)sender;
if (async.HasFile)
{
if (image1 != null)
{
try
{
File.Delete(MapPath("~/images/" + SelectHotels.SelectedItem) + image1);
}
catch
{
}
}
image1 = e.FileName;
if (File.Exists(MapPath("~/images/" + SelectHotels.SelectedItem + "/") + image1))
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "Change Image", "alert('Image with same name already exit please change name and upload');", true);
image1 = null;
}
else
{
if (!Directory.Exists(Server.MapPath("~/images/" + SelectHotels.SelectedItem)))
{
Directory.CreateDirectory(Server.MapPath("~/images/" + SelectHotels.SelectedItem)+image1);
str = "~/images/" + SelectHotels.SelectedItem;
str1 = "~/images/" + SelectHotels.SelectedItem + "/" + image1;
}
Please try this code,
public void EnsureDirectoriesExist()
{
// if the \pix directory doesn't exist - create it.
if (!System.IO.Directory.Exists(Server.MapPath(#"~/Folder_Name/")))
{
System.IO.Directory.CreateDirectory(Server.MapPath(#"~/Folder_Name/"));
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile && Path.GetExtension(FileUpload1.FileName) == ".jpg")
{
// create posted file
// make sure we have a place for the file in the directory structure
EnsureDirectoriesExist();
String filePath = Server.MapPath(#"~/Folder_Name/" + FileUpload1.FileName);
FileUpload1.SaveAs(filePath);
}
else
{
lblMessage.Text = "Not a jpg file";
}
}
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.
When I'm trying to delete the images uploaded by me via website named "SampleApplication" I can see the following error shown in Stack Trace
The process cannot access the file 'D:\Hosting\123456\html\App_Images\myfolder1\eKuK2511.png' because it is being used by another process.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.IO.IOException: The process cannot access the file 'D:\Hosting\123456\html\App_Images\myfolder1\eKuK2511.png' because it is being used by another process.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[IOException: The process cannot access the file 'D:\Hosting\123456\html\App_Images\myfolder1\eKuK2511.png' because it is being used by another process.]
System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +9723350
System.IO.File.Delete(String path) +9545728
SampleApplication.BasePage.DeleteApp_ImagesById(DataTable dt) +503
SampleApplication.PostLease.MyAccount.DeleteAd_Property(Object sender, EventArgs e) +193
System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) +118
System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +113
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +9
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +176
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272
The folder App_Images has been given Read/write Permission and inherits to child folders namely myfolder1, myfolder2, myfolder3, myfolder4. Even when I tried to forcefully delete the image eKuK2511.png from the FTP File manager it is showing the following error:
550 The process cannot access the file because it is being used by another process.
How to getrid of this error?
Edit:
Upload Code:
public void UploadImages()
{
if (ServerSideValidation() == true)
{
string SavePath;
ImgPaths = new List<string>();
// Get the HttpFileCollection
HttpFileCollection hfc = Request.Files;
if (hfc.Count > 0)
{
for (int i = 0; i < hfc.Count; i++)
{
HttpPostedFile hpf = hfc[i];
if (hpf.ContentLength > 0)
{
#region trials compression.
SavePath = "~/App_Images/" + Session["AppContext"].ToString() + "/" + GetUniqueKey() + GetFileExtension(hpf.FileName);
SaveImageByCompressing(hpf, SavePath);
#endregion
//SavePath can be saved in DB.
ImgPaths.Add(SavePath);
//Save Thumbnail Image.
if (i == 0)
{
string savedName = "Thumb_" + GetUniqueKey() + GetFileExtension(AppDomain.CurrentDomain.BaseDirectory + ImgPaths[0].ToString().Replace("~/", "\\").Replace("/", "\\"));
SavePath = "~/App_Images/" + Session["AppContext"].ToString() + "/" + savedName;
SaveThumbImage(AppDomain.CurrentDomain.BaseDirectory + ImgPaths[0].ToString().Replace("~/", "").Replace("/", "\\"), AppDomain.CurrentDomain.BaseDirectory + "App_Images\\" + Session["AppContext"].ToString() + "\\" + savedName, 75, 75);
ImgPaths.Add(SavePath);
}
}
}
Session.Remove("AppContext");
lblMsg.Text = "Images Uploaded Successfully.";
//ShowUploadedImages(ImgPaths);
}
else
{
lblMsg.Text = "Images uploaded are either in wrong format or were deleted after uploading.";
}
}
else
{
lstPaths = new List<string>();
lblMsg.Text = "No Images Uploaded";
}
}
private void SaveImageByCompressing(HttpPostedFile hpf, string filePath)
{
Image imgFromClient = Image.FromStream(hpf.InputStream);
string SavetoFullPath = AppDomain.CurrentDomain.BaseDirectory + filePath.Replace("~/", "").Replace("/", "\\");
Image.GetThumbnailImageAbort myCallbackCompressed = new Image.GetThumbnailImageAbort(ThumbnailCallback);
Image imageToSave= imgFromClient.GetThumbnailImage(imgFromClient.Width, imgFromClient.Height, myCallbackCompressed, IntPtr.Zero);
imageToSave.Save(SavetoFullPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
public static void SaveThumbImage(string imagePath, string filePath, int width = 0, int height = 0)
{
Image originalImage = Image.FromFile(imagePath);
if (width > 0 && height > 0)
{
Image.GetThumbnailImageAbort myCallback = new Image.GetThumbnailImageAbort(ThumbnailCallback);
Image imageToSave = originalImage.GetThumbnailImage(width, height, myCallback, IntPtr.Zero);
imageToSave.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
originalImage.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
private static bool ThumbnailCallback() { return false; }
private bool ServerSideValidation()
{
string errorMsg = string.Empty, temp = null;
bool errorFlag = true;
// Get the HttpFileCollection
HttpFileCollection hfc = Request.Files;
for (int i = 0; i < hfc.Count; i++)
{
HttpPostedFile hpf = hfc[i];
if (hpf.ContentLength > 0 && hpf.FileName!=String.Empty)
{
temp = ValidateImage(hpf);
if (temp != null)
{
errorMsg += GetFileName(hpf.FileName.ToString()) + " has error : " + temp;
temp = null;
}
}
else
{
return false;
}
}
if (!string.IsNullOrWhiteSpace(errorMsg))
{
lblMsg.Text = errorMsg;
errorFlag = false;
}
return errorFlag;
}
private string GetFileExtension(string filePath)
{
FileInfo fi = new FileInfo(filePath);
return fi.Extension;
}
private string GetFileName(string filePath)
{
FileInfo fi = new FileInfo(filePath);
return fi.Name;
}
private string GetUniqueKey()
{
int maxSize = 8;
char[] chars = new char[62];
string a = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
chars = a.ToCharArray();
int size = maxSize;
byte[] data = new byte[1];
RNGCryptoServiceProvider crypto = new RNGCryptoServiceProvider();
crypto.GetNonZeroBytes(data);
size = maxSize;
data = new byte[size];
crypto.GetNonZeroBytes(data);
StringBuilder result = new StringBuilder(size);
foreach (byte b in data)
{
result.Append(chars[b % (chars.Length - 1)]);
}
return Session["AppContext"].ToString() + Page.User.Identity.Name.ToString() + result.ToString();
}
private string ValidateImage(HttpPostedFile myFile)
{
string msg = null;
//6MB
int FileMaxSize = 6291456;
//Check Length of File is Valid or Not.
if (myFile.ContentLength > FileMaxSize)
{
msg = msg + "File Size is Too Large. You are allowed only a maximum of 6MB per Image.";
}
//Check File Type is Valid or Not.
if (!IsValidFile(myFile.FileName))
{
msg = msg + "Invalid File Type.";
}
return msg;
}
private bool IsValidFile(string filePath)
{
bool isValid = false;
string[] fileExtensions = { ".BMP", ".JPG", ".PNG", ".GIF", ".JPEG" };
for (int i = 0; i < fileExtensions.Length; i++)
{
if (filePath.ToUpper().Contains(fileExtensions[i]))
{
isValid = true; break;
}
}
return isValid;
}
Delete Code:
/// <summary>
/// Delete all images. If there are no Images then by default NoImage.png is assigned. So skip deleting that image.
/// </summary>
/// <param name="dt"></param>
protected void DeleteApp_ImagesById(DataTable dt)
{
if (dt.Rows[0][0].ToString() != "~/images/NoImage.png")
{
for (int i = 0; i < dt.Columns.Count; i++)
{
if (dt.Rows[0][i].ToString() != string.Empty)
{
string str = Regex.Replace(dt.Rows[0][i].ToString(), "~/", "");
File.Delete(Request.PhysicalApplicationPath.ToString() + Regex.Replace(str, "/", "\\").ToString());
}
}
}
}
The docs on MSDN about Image.Save say that the file remains locked until the Image is disposed.
So I suppose that changing the code that save the images in this way
private void SaveImageByCompressing(HttpPostedFile hpf, string filePath)
{
using(Image imgFromClient = Image.FromStream(hpf.InputStream))
{
string SavetoFullPath = AppDomain.CurrentDomain.BaseDirectory +
filePath.Replace("~/", "").Replace("/", "\\");
Image.GetThumbnailImageAbort myCallbackCompressed =
new Image.GetThumbnailImageAbort(ThumbnailCallback);
using(Image imageToSave= imgFromClient.GetThumbnailImage(imgFromClient.Width,
imgFromClient.Height, myCallbackCompressed, IntPtr.Zero))
{
imageToSave.Save(SavetoFullPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
public static void SaveThumbImage(string imagePath, string filePath,
int width = 0, int height = 0)
{
using(Image originalImage = Image.FromFile(imagePath))
{
if (width > 0 && height > 0)
{
Image.GetThumbnailImageAbort myCallback =
new Image.GetThumbnailImageAbort(ThumbnailCallback);
using(Image imageToSave = originalImage.GetThumbnailImage(width, height,
myCallback, IntPtr.Zero))
{
imageToSave.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
else
{
originalImage.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
is a safe way to ensure your images are immediately unlocked when you finish with the upload code
How can I clear the HttpContext.Current.Request.Files list?
After the postback, this still contains the files.
protected void Page_Load(object sender, EventArgs e)
{
if (this.IsPostBack)
this.SaveImages();
}
private Boolean SaveImages()
{
//loop through the files uploaded
HttpFileCollection _files = HttpContext.Current.Request.Files;
//Message to the user
StringBuilder _message = new StringBuilder("Files Uploaded:<br>");
try
{
for (Int32 _iFile = 0; _iFile < _files.Count; _iFile++)
{
if (!string.IsNullOrEmpty(_files[_iFile].FileName))
{
// Check to make sure the uploaded file is a jpg or gif
HttpPostedFile _postedFile = _files[_iFile];
string _fileName = Path.GetFileName(_postedFile.FileName);
string _fileExtension = Path.GetExtension(_fileName);
//Save File to the proper directory
_postedFile.SaveAs(HttpContext.Current.Request.MapPath("files/") + _fileName);
_message.Append(_fileName + "<BR>");
}
}
lblFiles.Text = _message.ToString();
return true;
}
catch (Exception Ex)
{
lblFiles.Text = Ex.Message;
//Refill images in control????
return false;
}
finally
{
//Clear HttpContext.Current.Request.Files!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
}
}