I am removing the image from kendo upload control.
This is my code
public ActionResult Remove(string[] fileNames)
{
if (fileNames != null)
{
foreach (var fullName in fileNames)
{
var fileName = Path.GetFileName(fullName);
var physicalPath = Server.MapPath(Path.Combine(("~/AssetAttachments"),fileName));
if (System.IO.File.Exists(physicalPath))
{
System.IO.File.Delete(physicalPath);
}
}
}
return Content("");
}
Physicalpath i have is E:\karthik related\JPL\Dev\Src\AssetTrackingSystem\AssetTrackingSystem\AssetAttachments\Attach3.jpg
Even though file and directory available
if (System.IO.File.Exists(physicalPath))
is returning false and coming out of condition.
Your help will be appreciated.
Try this:
foreach (var fullName in fileNames)
{
var physicalPath = System.IO.Path.Combine(HttpContext.Current.Server.MapPath("~/AssetAttachments"), fullName);
if (System.IO.File.Exists(physicalPath))
{
System.IO.File.Delete(physicalPath);
}
}
Try with this,
FileInfo fi = new FileInfo(Path.Combine(("~/AssetAttachments"),fileName));
if (fi.Exists)
{
fi.Delete();
}
Related
I have tried the following code ..
When I try out the following code I get 404 content not found. Also my controller doesn't get hit when I try to debug the code ..
public async Task<IActionResult> Download(string filename)
{
if (filename == null)
return Content("filename not present");
var path = Path.Combine(Directory.GetCurrentDirectory(),"wwwroot", filename);
var memory = new MemoryStream();
using (var stream = new FileStream(path, FileMode.Open))
{
await stream.CopyToAsync(memory);
}
memory.Position = 0;
return File(memory, GetContentType(path), Path.GetFileName(path));
}
Upload file with size and filename as response:
public async Task<IActionResult> OnPostUploadAsync(IFormFile file)
{
long size = file.Length;//in bytes
if (file.Length > 0)
{
var name = Path.GetRandomFileName();
//var fileOriginName = file.FileName;
var path = Path.Combine(System.IO.Directory.GetCurrentDirectory(), "wwwroot", name);
using (var stream = System.IO.File.Create(path))
{
await file.CopyToAsync(stream);
}
return Ok(new { size = size, filename = name });
}
else {
return Ok(new { size = 0, filename = ""});
}
}
===============================================
I have an api like below and I had a file test.txt in wwwroot folder.
public async Task<IActionResult> Download(string filename)
{
if (filename == null)
return Content("filename not present");
var path = Path.Combine(System.IO.Directory.GetCurrentDirectory(), "wwwroot", filename);
var memory = new MemoryStream();
using (var stream = new FileStream(path, FileMode.Open))
{
await stream.CopyToAsync(memory);
}
memory.Position = 0;
var contentType = "APPLICATION/octet-stream";
return File(memory, contentType, Path.GetFileName(path));
}
Then when I call localhost:port/home/download?filename=test then I'll get exception that file can't find. And when I call localhost:port/home/Download?filename=test.txt it succeeds.
My API is in an asp.net core MVC project and I think you need to check the contentType.
I am designing an educational site. When the user downloads a training course, I want this download (training course) to be done in the form of compression (zipper), please give a solution
My code:
public Tuple<byte[],string,string> DownloadFile(long episodeId)
{
var episode=_context.CourseEpisodes.Find(episodeId);
string filepath = Path.Combine(Directory.GetCurrentDirectory(),
"wwwroot/courseFiles",
episode.FileName);
string fileName = episode.FileName;
if(episode.IsFree)
{
byte[] file = System.IO.File.ReadAllBytes(filepath);
return Tuple.Create(file, "application/force-download",fileName);
}
if(_httpContextAccessor.HttpContext.User.Identity.IsAuthenticated)
{
if(IsuserIncorse(_httpContextAccessor.HttpContext.User.Identity.Name,
episode.CourseId))
{
byte[] file = System.IO.File.ReadAllBytes(filepath);
return Tuple.Create(file, "application/force-download", fileName);
}
}
return null;
}
I write a demo to show how to download zip file from .net core:
First , Add NuGet package SharpZipLib , create an Image Folder in wwwroot and put some picture in it.
controller
public class HomeController : Controller
{
private IHostingEnvironment _IHosting;
public HomeController(IHostingEnvironment IHosting)
{
_IHosting = IHosting;
}
public IActionResult Index()
{
return View();
}
public FileResult DownLoadZip()
{
var webRoot = _IHosting.WebRootPath;
var fileName = "MyZip.zip";
var tempOutput = webRoot + "/Images/" + fileName;
using (ZipOutputStream IzipOutputStream = new ZipOutputStream(System.IO.File.Create(tempOutput)))
{
IzipOutputStream.SetLevel(9);
byte[] buffer = new byte[4096];
var imageList = new List<string>();
imageList.Add(webRoot + "/Images/1202.png");
imageList.Add(webRoot + "/Images/1data.png");
imageList.Add(webRoot + "/Images/aaa.png");
for (int i = 0; i < imageList.Count; i++)
{
ZipEntry entry = new ZipEntry(Path.GetFileName(imageList[i]));
entry.DateTime= DateTime.Now;
entry.IsUnicodeText = true;
IzipOutputStream.PutNextEntry(entry);
using (FileStream oFileStream = System.IO.File.OpenRead(imageList[i]))
{
int sourceBytes;
do
{
sourceBytes = oFileStream.Read(buffer, 0, buffer.Length);
IzipOutputStream.Write(buffer, 0, sourceBytes);
}while (sourceBytes > 0);
}
}
IzipOutputStream.Finish();
IzipOutputStream.Flush();
IzipOutputStream.Close();
}
byte[] finalResult = System.IO.File.ReadAllBytes(tempOutput);
if (System.IO.File.Exists(tempOutput)) {
System.IO.File.Delete(tempOutput);
}
if (finalResult == null || !finalResult.Any()) {
throw new Exception(String.Format("Nothing found"));
}
return File(finalResult, "application/zip", fileName);
}
}
when I click the downloadZip ,it will download a .zip file
The simple example that follows illustrates the use of the static ZipFile.CreateFromDirectory method which, despite the fact that it is in the System.IO.Compression namespace , actually resides in the System.IO.Compression.FileSystem assembly, so you need to add a reference to that in your controller.
[HttpPost]
public FileResult Download()
{
List<string> files = new List<string> { "filepath1", "filepath2" };
var archive = Server.MapPath("~/archive.zip");
var temp = Server.MapPath("~/temp");
// clear any existing archive
if (System.IO.File.Exists(archive))
{
System.IO.File.Delete(archive);
}
// empty the temp folder
Directory.EnumerateFiles(temp).ToList().ForEach(f => System.IO.File.Delete(f));
// copy the selected files to the temp folder
files.ForEach(f => System.IO.File.Copy(f, Path.Combine(temp, Path.GetFileName(f))));
// create a new archive
ZipFile.CreateFromDirectory(temp, archive);
return File(archive, "application/zip", "archive.zip");
}
Answer from Source - MikesDotNetting
How I will upload a file in the database without using ViewModel in asp .net core? Is it possible or not? ***
Advance thanks
public async Task<IActionResult> Create([Bind("Id,CategoriesId,Product_Name,Image_path,Add_Date,Price,Quantity,Description")]Product product, IFormFile file)
{
if (ModelState.IsValid)
{
if (file == null || file.Length == 0)
{
return RedirectToAction(nameof(Create));
}
else
{
string filename = System.Guid.NewGuid().ToString() + ".jpg";
var path = Path.Combine(
Directory.GetCurrentDirectory(), "wwwroot", "Images", filename);
using (var stream = new FileStream(path, FileMode.Create))
{
await file.CopyToAsync(stream);
}
byte[] filenamee = Encoding.ASCII.GetBytes(filename);
p.Image_path = filenamee;
}
_context.Products.Add(p);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
ViewData["CategoriesId"] = new SelectList(_context.Category, "Id", "Category_Name", product.CategoriesId);
return View(product);
}
I have created the cache button to clear all the .json files. Its perfectly working fine in local machine. But when i uploaded in server the cache button is not working.
After uploading in server, when i click on clear cache button the message is displaying as cache(.json files) has been cleared but actually all .json files is remain as it is.
Please help me in this isuue.
below is the code
#region Delete Cache Functions
public bool FnDeleteCache(string directoryName)
{
try
{
var di = new DirectoryInfo(rootDirectory + directoryName);
di.Attributes &= ~FileAttributes.ReadOnly;
if (CacheAttribute() == true)
{
System.IO.DirectoryInfo directory = new System.IO.DirectoryInfo(rootDirectory + directoryName);
foreach (System.IO.FileInfo file in directory.GetFiles())
{
if (file.Name != null)
file.Delete();
}
return true;
}
}
catch
{
return false;
}
return false;
}
public bool FnDeleteCache(string directoryName, string FileName)
{
var di = new DirectoryInfo(rootDirectory + directoryName);
di.Attributes &= ~FileAttributes.ReadOnly;
if (CacheAttribute() == true)
{
System.IO.DirectoryInfo directory = new System.IO.DirectoryInfo(rootDirectory + directoryName);
foreach (System.IO.FileInfo file in directory.GetFiles())
{
if (file.Name.Contains(FileName))
{
file.Delete();
return true;
}
}
}
return false;
}
#endregion
Thank you.
Error while uploading file method in Client Object Model + Sharepoint 2010. Once the file got uploaded. After that though the code compiles with no error
I get the error while executing
"{"Value does not fall within the expected range."}
{System.Collections.Generic.SynchronizedReadOnlyCollection}
I have a method which takes care of functionality to upload files
///////////////////////////////////////////////////////////////////////////////////////////
public void Upload_Click(string documentPath, byte[] documentStream)
{
String sharePointSite = "http://cvgwinbasd003:28838/sites/test04";
String documentLibraryUrl = sharePointSite +"/"+ documentPath.Replace('\\','/');
////////////////////////////////////////////////////////////////////
//Get Document List
List documentsList = clientContext.Web.Lists.GetByTitle("Doc1");
var fileCreationInformation = new FileCreationInformation();
//Assign to content byte[] i.e. documentStream
fileCreationInformation.Content = documentStream;
//Allow owerwrite of document
fileCreationInformation.Overwrite = true;
//Upload URL
fileCreationInformation.Url = documentLibraryUrl;
Microsoft.SharePoint.Client.File uploadFile = documentsList.RootFolder.Files.Add(
fileCreationInformation);
//uploadFile.ListItemAllFields.Update();
clientContext.ExecuteQuery();
}
/////////////////////////////////////////////////////////////////////////////////////////////////
In the MVC 3.0 application in the controller I have defined the following method to invoke the upload method.
//////////////////////////////////////////////////////////////////////////////////////////////////
public ActionResult ProcessSubmit(IEnumerable<HttpPostedFileBase> attachments)
{
System.IO.Stream uploadFileStream=null;
byte[] uploadFileBytes;
int fileLength=0;
foreach (HttpPostedFileBase fileUpload in attachments)
{
uploadFileStream = fileUpload.InputStream;
fileLength=fileUpload.ContentLength;
}
uploadFileBytes= new byte[fileLength];
uploadFileStream.Read(uploadFileBytes, 0, fileLength);
using (DocManagementService.DocMgmtClient doc = new DocMgmtClient())
{
doc.Upload_Click("Doc1/Doc2/Doc2.1/", uploadFileBytes);
}
return RedirectToAction("SyncUploadResult");
}
//////////////////////////////////////////////////////////////////////////////////////////////////
Please help me to locate the error
I think your documentLibraryUrl needs to be relative. This is working for me with Sharepoint 2013
[HttpPost]
[ValidateAntiForgeryToken]
[SharePointContextFilter]
public ActionResult Upload()
{
if (Request.Files.Count > 0)
{
HttpPostedFileBase file = Request.Files[0];
if (file != null && file.ContentLength > 0)
{
var fileName = Path.GetFileName(file.FileName);
var spContext = SharePointContextProvider.Current.GetSharePointContext(HttpContext);
using (var clientContext = spContext.CreateUserClientContextForSPHost())
{
if (clientContext != null)
{
FileCreationInformation newFile = new FileCreationInformation();
using (MemoryStream ms = new MemoryStream())
{
file.InputStream.CopyTo(ms);
byte[] array = ms.GetBuffer();
newFile.Content = array;
}
List docs = clientContext.Web.Lists.GetByTitle("Documents");
Folder folder = docs.RootFolder;
clientContext.Load(folder);
clientContext.ExecuteQuery();
newFile.Url = docs.RootFolder.ServerRelativeUrl + "/" + fileName;
Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(newFile);
clientContext.Load(uploadFile);
clientContext.ExecuteQuery();
//Set the metadata
Microsoft.SharePoint.Client.ListItem item = uploadFile.ListItemAllFields;
string docTitle = string.Empty;
item["Title"] = docTitle;
item.Update();
clientContext.ExecuteQuery();
}
}
}
}
return RedirectToAction("Index", new { SPHostUrl = SharePointContext.GetSPHostUrl(HttpContext.Request).AbsoluteUri });
}