What are the options for handling file uploads to reduce the memory footprint? Is there a way to upload in chunks? Is there a way to stream upload directly to disk instead of loading entire file in server memory?
View 1 RepliesI want upload a big data file i.e. upto 6gb file in asp dot net into chunks and show progress bar depends upon that chunks ...
View 1 Repliesi need to save multiple documents stored in SQL server as Image type to disk.
What i want to do is "backup" all files in a table (column) to disk, zip them and Response.TransmitFile(FilePath) to client.
I could use C# ot VB but that would require a lot of connections to database or a lot of server memory and i don't want that, becauze there are a lot of files to be saved Since SQL can write files to disk i was thinking about saving those files to disk directly from sql. Something like when u're doing a backup
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Is there a way to write xml directly to an object that can represent it in memory and use that with XPath instead of an .xml file?
View 1 RepliesSo I'm working on a site that is going to need a file upload control where the user would be able to upload an image, and then the page would postback causing the image to appear for their viewing (before they submit the data to the database, the image is being stored as type image). What I do now is have my own private web form where people send me their image, I format it accordingly and use the following simple code to upload it:
byte[] newimage = fileUpImgFile.FileBytes;
var myDataTable = (from item in context.TypeSet where item.Number == txtBxNumber.Text.Trim() select item).ToList();
foreach (Type item in myDataTable)
{
item.Photo = newimage;
}
context.SaveChanges();
Which works, but in this case, it would only work if the record exists already in the database so the person would have to save the data, then go back in and upload the image (inconvenient and inefficient). Is there a way to upload it, store it in memory, and then display it, without saving it to the database?
I need to upload an excel file using a web application. Then I need t oread it in memory without saving it on the server.
Does the file need to have headers? Also the data is such that it may have or may not have values for some columns.
I have a requirement that to create a image with 300DPI, but during the composition of image, like addding the resources (font, images) I am getting out of memory exception.
using (Bitmap pg = new Bitmap(GetPixelsFromInches(float.Parse(pageWidth), dpi, actualDpi), GetPixelsFromInches(float.Parse(pageHeight), dpi, actualDpi)))
{
pg.SetResolution(float.Parse(dpi), float.Parse(dpi));
Graphics gr = Graphics.FromImage(pg);
gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
System.Drawing.Rectangle pgRect = new System.Drawing.Rectangle(0, 0, pg.Width, pg.Height);
SolidBrush solidWhite = new SolidBrush(Color.White);
gr.FillRectangle(solidWhite, pgRect);
currentPageDisplayed = xNode.Attributes["id"].Value;
foreach (XmlElement xElement in xNode)
{
//Here I am writing each elements, like texts or images.
DrawImageForElements(xElement, , dpi, actualDpi);
}
MemoryStream myMemoryStream = new MemoryStream();
//pg.Save(myMemoryStream, System.Drawing.Imaging.ImageFormat.Bmp);
String filename=@"c:images" + currentPageDisplayed + "+.png";
pg.Save(filename, System.Drawing.Imaging.ImageFormat.Png);
myMemoryStream.Dispose();
gr.Dispose();
pg.Dispose();
}
I have to large files in a database which users can download. The user clicks a link and the following code runs:
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I'm populating a generic list from an excel file that contains names of pdf files. Now I want to take each item in the list and create a file from it. Here's what I have so far:
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So now, the list called lines contains names of 900 pdf files. How would I take those names out of the list and create files from them?
I am using the async file upload control to upload to a image file. I want the user to upload only jpg files. And for that I am checking the uploadedfile content type in server side, after the upload complets. I wanna check this, before upload starts. There is one javascript method
function startUpload(sender, args){}
but how to access the content type of the file selected by user.
How would you handle an out of memory or out of disk space error? I would like to log the error and then show the user an error page rather than have the user see the actual error message thrown by the server.
View 5 RepliesI want to write "upload multiple files at a time" functionality during upload files in dot net.I am not allowed to use JQuery.All i want is core dotnet.
View 2 Replieshow to upload and save files to oracle database, and view file using C# .net and can upload one or more files in one webform.
View 1 RepliesI want to upload files to the web servers from the client machines.
Can i upload a file on a network share folder using file upload control?
I would like to create a share folder on a file server sitting next to the web server. If i upload the file from the network share folder instead of uploading it from the client machine does it make any difference?
Will the file be stored in a temporary location before copying to the final destination? Where will be the file stored in this case of uploading it from share folder?
I want to delete an image from disk
how do I do this?
I am using ASP.NET 3.5 with iTextSharp and I have the following code:
var templatePath = Server.MapPath(@"~/Templates/template1.pdf");
var newFilePath = Server.MapPath(@"~/TempFiles/new.pdf");
PdfReader pdfReader = new PdfReader(templatePath);
PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileStream(newFilePath, FileMode.Create));
AcroFields pdfFormFields = pdfStamper.AcroFields;
pdfFormFields.SetField("Box1", "007");
pdfFormFields.SetField("Box2", "123456");
pdfStamper.FormFlattening = false;
pdfStamper.Close();
Response.ClearContent();
Response.Buffer = true;
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment;filename=new.pdf"));
Response.WriteFile(newFilePath);
Response.End();
The above code fills out a pdf file and saves the new file to the TempFiles folder. It then prompts the user to either save or open the file. Can I achieve the same functionality without saving the file to the TempFiles location?
I have a really weird problem. It actually made me restart the computer.
View 1 RepliesI have a file on the disk and I want to give Full Control Permission to all the users of that computer.
View 6 RepliesReally weird problem loading a file from disk:
string path = HttpContext.Current.Server.MapPath("~/Datasets/blob.xml");
FileStream stream = new FileStream(path, FileMode.Open);
Throws exception:An exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll but was not handled in user code
Additional information: Access to the path 'D:webrootafobDevv1.0.xAFOBDatasetslob.xml' is denied.
The strange thing is it was working 5 minutes ago. I checked permissions on the disk and both the Debugger and ASPNET have read/write rights as do I.
I need to be able to read an excel file from a file upload control but I can not save the file to disk first, it must be done in memory.
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Above is my code for reading the data file if it IS saved to disk, but again, I have to be able to do this without saving the file to disk, it must be done in memory. I have not been able to find any sample code anywhere on how to do this from memory, everything seems to force the file be uploaded, saved to disk, and then read in the connection string, which again I can not do.
In my application I store a string as content of a HTML file.
How can I preview this content (assuming that it's modified from original content) in browser but not having to save it to disk locally.
And the preview to be in another tab or window.
I have a css file which I want to read from disk and in that content I want to find and replace all linebreaks (do I look for vbCrlf or ...?)
Public Shared Function GetFileContents(ByVal FullFilename As String) As String
Dim filecontents As String = ""
If File.Exists(FullFilename) Then
Dim objStreamReader As StreamReader
objStreamReader = File.OpenText(FullFilename)
filecontents = objStreamReader.ReadToEnd()
objStreamReader.Close()
End If
Return filecontents
End Function
So in the returned variable "filecontents" I want to find and replace any linebreaks.
FILE: style.css
#progress{color:#000;width:500px;height:30px;padding:0px;clear:both;}
#progress ul{list-style:none;padding:0px;margin: auto;display:block;}
#progress ul li{list-style:none;display:inline;float:left;width:auto;height:30px;padding:0px;line-height:30px; font-family:Arial, Helvetica, sans-serif; font-size:13px;}
I've a view which display all data. I'm using ViewData, for loop etc.. on the view, to show the data. It may sound weird, but is it possible to write view to disk as a file instead of showing in the browser. The reason is that, business wants functionality to send the same view file as email attachment to the user.
View 3 RepliesSpent ages trying to get this right but am struggling now. I have a list box and textbox, I can happily enter Email addresses into the textbox which are saved into a text file and populated in a list box. I want to be able to select a list item and delete it, along with it's record in my text file. I was going to do it by on the delete list item / button click, it delete's the text file and then writes and a new one with the remaining list items in the list box. Unfortunately it's re-writing the file but either not including the remaining list items. Here's some examples of what I've changed and what populates the text file:
StreamWriter1.WriteLine(Addresses.Items); - System.Web.UI.WebControls.ListItemCollection
StreamWriter1.WriteLine(Addresses.Text); - A blank line?!?
The code is below. The reason I wouldn't allow the user to delete the first list item is because I thought the code was working ok but for some reason putting in a blank line to start with, and if I deleted the line it'd delete all file content. No, I don't know why I thought that either.
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where I've gone wrong? I've not actually slept since I woke up at 8am yesterday. It's now 11am... today.
How to save Ajax Editor content as an HTML file to a disk?
Let's say I have an Ajax Editor which allows user to type or paste in long message or writting. Once he clicks on "submit" button, an HTML file will be created and save to a disk. I am working on asp.net 3.5, ajax version 3.5 (from codeplex, work well).