Web Forms :: File Reading And Writing For Number Of User

Mar 16, 2011

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.

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Web Forms :: Rollback From File Reading / Writing

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I 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

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Databases :: Reading From Excel File With Warning 'number Stored As Text'

Jun 8, 2010

in my application i have to read from an excel files and check the value of every cell i'm using an OleDb connection to open it and reading but i have this issue if some of the cells in the excel sheet is having this warning when i try to read it returns DBNull ??could any one give me a clue ....knowing that i can not force the user for not having this warning ...i have to solve this within my code .

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Web Forms :: Reading And Writing Textfile In ASP.net

Dec 20, 2010

I am trying to read and write text file like that, writing

StreamWriter wr = new StreamWriter(Server.MapPath("aa.txt")); wr.Write("aaaa" + System.Environment.NewLine); wr.Write("bbbb" + System.Environment.NewLine); wr.Write("bbbb" + System.Environment.NewLine); wr.Close();
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Web Forms :: Reading And Writing Data Using POST Method

Aug 24, 2010

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IE Reading / Writing On Client End?

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Go About Reading And Writing To Virtual Directory In 7?

Feb 10, 2010

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Reading / Writing Text Files On Server?

Mar 4, 2011

I have write small web-service that recieves query and read txt file for matching. For it I'm using StreamReader.

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Databases :: Reading And Writing MS Excel (2007) Files?

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Security Exception Over Reading/writing Files On Medium Trust?

Nov 21, 2010

I'm working on a project in ASP.Net, and it requires reading/writing to files on my server. I'm hosted at GoDaddy, and they swear they've got me at Medium Trust. When I try to read or write files that are in my own domain, I get Security Exceptions. I've tried multiple ways of opening/saving the files and they all return security errors. Here's the most recent error and offending line of code (I didn't save them all, they're all pretty much the same thing):

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.MediaPermission, WindowsBase, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35' failed.

PngBitmapEncoder pbe = new PngBitmapEncoder();
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I've also gotten the error when trying to read/write using FileStream, Bitmap.Save and new Bitmap("ornament.png"). Could there be a problem with my Web.config? Is read/write supposed to be blocked by medium trust? This is a time-sensitive project and this is a brick wall for me. The deadline is end of business day tomorrow and GoDaddy isn't responding.

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Reading A File Into Memory And Then Reading It One Line At A Time?

Mar 7, 2011

I know this is probably a pretty easy thing to do and it is if I can upload the file and store it onto the hard drive of the server. What I need to do is read the text file into memory and then parse through it one line at a time. Anyone have any code that demonstrates that?

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Web Forms :: Automatic File Reading / Check For New File Everyday And If The New File Is In The Folder Read It

Sep 20, 2010

I would like ask you for some ideas how can I write mechanism that will be automatically read files from folder. I don't know how to schedule the write task. I want to check for new file everyday and if the new file is in the folder read it.

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Web Forms :: Deleting List Item / File - Writing New File With Remaining Items

Dec 23, 2010

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
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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.


where I've gone wrong? I've not actually slept since I woke up at 8am yesterday. It's now 11am... today.

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Security :: Finding Or Writing Hash Function - Convert Word To Number

Jan 14, 2010

I am tasked with a project to convert words from strings to numbers . I have to do this while ensuring collision-avoidance. i.e training -> 10232323

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Also, the function should accept unicode characters - in the event the company decides to internationalize.

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DataSource Controls :: Is There A Limit On Number Of Columns For Reading CSV Files

Apr 21, 2010

I'm trying to read a CSV file into a DataTable using OleDbConnection and OleDbDataAdapter. It works loading the DataTable, but only does 255 columns. The file has 362 columns.

Code is as follows -


I have a schema.ini too -


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Web Forms :: Writing To Log File On First Pageload?

Oct 27, 2010

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?


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Web Forms :: Writing A File (doc) To Different Server On The Network?

May 18, 2010

I am trying to create and write a file on a remote server using the below 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:

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I was also thinking if i can use the virtual directory as the path to the remote folder, something like
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Web Forms :: Writing Bitmap File On Server?

Oct 19, 2010

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.

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WCF / ASMX :: Add Service Reference Reading Svc File But Not Reading Service?

Mar 10, 2011

I was trying to go through this tutorial:


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"An error occurred during the processing of a configuration file required to service this request. review the specific error details below and modify your configuration file appropriately."

"Parser Error Message:There is no service behavior named 'AdventureWorks_WebServer.Service1Behavior'."

"Metadata contains a reference that cannot be resolved: 'http://localhost:55579/Service1.svc'.

The server did not provide a meaningful reply; this might be caused by a contract mismatch, a premature session shutdown or an internal server error.

If the service is defined in the current solution, try building the solution and adding the service reference again."

here's my web.config file:


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Web Forms :: Writing A Log In Xml File Or Insert Query In Database?

Feb 20, 2010

i want to maintain a log of the visitors for a website.. the number of visitors is fix approximate (800), but i have to maintain the record of each visit page wise like page Id, time visited, user id. i am doing it using a database as it was .

i was asked to use a insert query on every page ,(ie each time user visits a page write the log to database), but i dint like the idea.. of making server trips every time the user visits a page and also we have a seperate database server. I had a idea of using XML.. but which is the best way performance wise writing a log in Xml file or insert query in database?

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Web Forms :: Writing To A Text File Upon Application Login

Aug 24, 2010

I have the following subroutine in an asp.net application class. The subroutine writes data to a text file upon application login. My question is that if this function was called at the same time by two different users would it cause any kind of error. Is there a need for a try catch?

Public Shared Sub writeToLogFile(ByVal UserName As String)
Dim strLogMessage As String = String.Empty
Dim strLogFile As String = System.Web.HttpContext.Current.Server.MapPath("~/Log.txt") Dim swLog As StreamWriter
strLogMessage = DateTime.Now.ToShortDateString().ToString() " ==> " & UserName
If Not File.Exists(strLogFile) Then
swLog = New StreamWriter(strLogFile)
swLog = File.AppendText(strLogFile)
End If
End Sub

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Web Forms :: Writing Metadata To File Error On Build?

Jun 29, 2010

I keep getting this error when trying to Run or Build my ASP Project. A few details:

I migrated this project from VS 2003 to VS 2008 (C#) It works fine when I successfully compiled it and deployed onto server.I have Plenty of free diskspace available.I have 4 GB Ram and Windows XP So each time I try to build this project, I get the following error.

Error 57
Unexpected error writing metadata to file 'C:InetpubwwwrootProject.IntranetobjTestProject.Intranet.dll' -- 'Not enough storage is available to complete this operation. 'Project.Intranet

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Web Forms :: Writing Text To File With Open Or Save Dialog Box?

Mar 29, 2010

i trying to write some text to a file in browser system......for this i'm using stream writer as like this

StreamWriter sw = new StreamWriter("c:/Billing report.doc");

but wat i need is browser should open a dialog box and ask open or save.

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Web Forms :: Writing A Custom Class For A Single File Uploader?

Oct 21, 2010

I'm fairly new at writing c# with asp.net and thought I'd give writing a custom class for a single file uploader, but Im a bit stuck with it. I get build errors with a few of the items, here's my code:


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Web Forms :: Reading A RTF File In C#?

Mar 25, 2010

I need to read a rtf file and then display the same in div tag. and a normal html text box after reading the content i get to see rtf formating special characters Is there any way that i can remove these special formating characters?

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