Writing Xml To Memory Instead Of A File?
Feb 18, 2010Is 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 RepliesIs 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 RepliesWhat 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 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:
[Code]....
Spent 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.
[Code]....
where I've gone wrong? I've not actually slept since I woke up at 8am yesterday. It's now 11am... today.
I am trying to write some lines at runtime to a text file using streamwriter, but i have to allow only 100 lines to be written to that file, if 101 line is supposed to be written to that file than first line of the file must get discarded/deleted and file must allow writing the 101 line so the file will actually always contain only 100 lines.
View 10 RepliesThe users have requested the option to "generate" an excel file representation of GridView contents.
Does anyone know how to do this without saving the file to the server but rather just streaming it to the user from memory?
My below code is working
streaming directly from memory instead of using physical path of server machine then saving the file on client machine
Private Sub generateExcelSheet()
Try
Dim weekFrom As String = DdFromWeek.SelectedValue
Dim weekTo As String = DdToWeek.SelectedValue
[Code]....
I am building an asp.net application, using II6 on windows server 2003 (vps hosting).
I am confronted with an error I didn't receive on my development machine (windows 7, iis 7.5, 64 bit).
When my wcf service tries launching my query running against a local sql server this is the error I receive:
Memory gates checking failed because the free memory (43732992 bytes) is less than 5% of total memory. As a result, the service will not be available for incoming requests. To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element.
I have both VS 2005 and 2008 installed on my machine. 2005 is fine. For 2008, literally any asp.net project I try to create gets this eror. I try stepping into the code, and the error occurs apparently before anything that I can trap is loaded. There is no information written to the event log. I have tried this with a "Hello World" webpage with nothing else going on. Seems unique to my Windows Server 2003 machine.
View 3 RepliesI am getting a weird error in asp.net while using leadtools imaging api. Here's the stack trace.
System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at SetThreadData(_THREADDATA* )
at Leadtools.Codecs.CodecsOptions.Use()
at Leadtools.Codecs.RasterCodecs.DoSave(SaveParams saveParams)
at Leadtools.Codecs.RasterCodecs.Save(RasterImage image, Stream stream, RasterImageFormat format, Int32 bitsPerPixel)........
I am maintaining C# .NET code written by somebody else, I get following exception few times,Attempted to read or write protected memory. This is often an indication that other memory is corruptThe code structure where I get the above exception is somethign like this,- it is using ref variables in following sequence,Variable-1 and variable-2 are local variables in App1, - App1: func1() which passes these variables reference to func2(), - App1: func2() passes same variables reference via .net remoting to another application (App2).-App2: does the same passes same received reference to another call 2 times.- The execption is occured while returning from App2.
(App1:func1(ref Var1, ref Var2) --> App1:func2(ref Var1, ref Var2) <---App1 .net remoting to App2--> App2:func3(ref Var1, ref Var2)--> App2:func4(ref Var1, ref Var2)-->variables getting updated and function returned to original caller)
My doubts are ,1. Is passing reference variables in such chain is correct? will it cause such exeption? Does .net support ref variable call directly?
I have a page posting data to me via HTTP POST. What i want is write posted data into mp4 video format file. Here my code how to write that file:
string strFilePath = "D:\Video.mp4";
using (FileStream fs = new FileStream(strFilePath, FileMode.Create))
{
byte[] bytes = new byte[Request.InputStream.Length];
Request.InputStream.Read(bytes, 0, (int)Request.InputStream.Length);
fs.Write(bytes, 0, bytes.Length);
}
My problem is that i got the file, but it's corrupt when playback. Is there any problem with my stream or i missing some decode for mp4 file?
Based on this piece of code, I want to do exactly like this demonstration. However, correct me if I'm wrong but if two or more users somehow simultaneously access the web page at the same precise nanosecond in time, then wouldn't we have a race condition? So is this piece of code valid? How would I correct this to make it thread safe?
[Code]....
1.What is the use of writing method as webmethod in cs file
2.what is the use of calling webmethods through javascript file.
i have table data which i am currently writing to an excel file, but i need to be able to securely password protect the file. Ive been told excel passwords are easy to break, so is there another file type which i can dynamically write to and password protect for emailing elsewhere (and requiring receiver to type password in to access it)?
View 2 RepliesI am using more than one files to read and write to the server. Suppose during writing or reading any of files gets error the already stored files need to be rollback or removed from storing.So that the user agin try to write without error. Simply the all of the files need to be stored into the server without error, of error occurs to any of file none of files need to be read/write
View 2 Repliesi have write data from db to .txt file,where db have large amount data,i need to wite data into file, if some error occure, then reInitiated that file and write data again without stop process.that is Continuous calling same process
View 2 RepliesI am trying to create and write a file on a remote server using the below code:
[Code]....
but i am running into issues and getting errors. Below are some tries i have given. My IIS settings are 'Anonymous Access' checked and also 'Integrated windows authentication' checked.
a. As i understand asp.net site would run using ASPNET account, i tried giving full permission to ASPNET account to the folder on the remote server (where i want to drop the file). But i am getting this error - "Logon failure: unknown user name or bad password"
b. The other thing i tried is giving full permissions to 'Everyone' to the remote server folder. But i get the same error as above. But when in my web.config i enable impersonation by using:
[Code]....
then the error goes away and everything works fine as expected. The file gets dropped to the network share.
why the scenario (a) doesn't work because that should work as if i give ASPNET account full access to the folder, and my website is running under the same account, then it should work.
Also, in the scenario (b), i believe it is using my domain account, as the impersonation is true without specifying any username and password and also the remote server folder has Everyone access to full control.
BUT, as a security breach, i cannot use Everyone account to the remote folder. In that case, how can i make this working.
I was also thinking if i can use the virtual directory as the path to the remote folder, something like
http://domain.com/remotefolder but dont know how can i use this approach. Can someone pls share some sample code and the configuration.
I'm making an application which takes image from user upload it to server and then perform any image processing like to convert to gray or invert etc.
My problem is this when i did the process on image to gray it or invert then how to write this new file on server or is there any other way so that i would be able to show this (new) image to user and make it downloadable?
Which storage method should I use when using ASP.NET Charting Tools? I'm currently using memory, because it seems like the most straight-forward and easy to implement option. Is there any reasons I should be aware of why I should choose one of the other options? The charts generated will be useful only for an overview kind of purpose (checking to see if a data collection is following a certain pattern, as it is being built day by day), and this function won't be used frequently.
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?
How can i Make A Text File In Memory(Ram -> Save NoWhere) And Write Something On It And Open NotePad on top of Client browser And Open That Text File In It And Let the user save it by him/her self? -> in code behind
View 1 RepliesHow do I create a text file and write the contents of a string to it? I plan to reference to the text file later. It could be on the server (root folder) or anywhere where I can reference it. Below is the string contents
foreach (string s in strValuesToSearch)
{
if (result.Contains(s))
result = result.Replace(s, stringToReplace);
In my application i want to share one .txt for read and write among no. of users. in Button click i m writing data in that file and in tick event of Timer i m reading that file, In tick event i m reading that file based on file based cachin means if file have been changed then only i m reading that file but when i have put m application i IIS then i m not able to get updated file.
View 2 RepliesI have written the web.config for same server without username and server and its working.
but not been able to provide the username and password in web.config file.
Following is my web.config for Server:
[Code]....
I have to write another web.config for client application with username and passoword. how could i use it.
server name is "BM", User is "Sa" and Password is "abc"