I'm writing some text to a memory stream and need to modify it once in the memory stream The reason I can't modify prior to adding to the memory stream is that it is from some 3rd party component. Here is an example:ms = New MemoryStreamdoc.Save(ms, SaveFormat.Html)I need to do some modification to the resulting text that ends up in ms. Is there a way to convert the contents of ms into a string, and then back into a memory stream once modified?
I have a problem with the cryptostream, if i write the stream to a memorystream the memory that the stream used is still alocated and i have no way of unalocating it.what am i missingdoing wrong? im using-using on the streams,readers and crypto stuffs so the framework should shut them all down right? i tryed calling .close and .dispose but nothing ,in fact i moved it all over I have provided the sub that im using for the encrytion im in .net 4.5 so there is a lil async stuff but i know thats not the problem coz i moved this code out of my main app(.net 4) for testing to see if i could fix the problem.[code...]
I'm using the ShockwaveFlash ActiveX control in a VB.NET Windows Forms application and i'm wondering.Is it possible to load an SWF file into the ShockwaveFlash ActiveX object from a memory stream rather then from a file name?
I've noticed that the ActiveX object has such properties as "InlineData" and "MovieData", possibly these could be used.
I've also noticed someone has used Windows Messaging to send a pointer to a stream to the ActiveX control, has anyone seen this done?
I have a filename(including it's path) in a string. Now i want to load this .csv file into memory stream. ex: Dim filename as string="C:UsersDesktopabc.csv"
I have an application that sends Bytes of data through UDP, these bytes are read from an AVI file when the client receives the bytes it builds the AVI file on another computer perfectly but I want to be able to use the received bytes to play the video from the stream. Does anyone know how I can play the video from a stream? I tried using DirectShow but I don't know how to use a stream as video let alone having AVI files play with DirectShow.
My main goal is to have the application slowly "buffer" the movie for the client as they watch.
im trying to get a memory stream to a textbox, the memory stream is of a .txt or .ini file that is extracted from a archive to a memory stream.Heres what ive got so far:
vb Dim MSData As New System.IO.MemoryStream() Dim Infile As String = ComboBox10.SelectedValue 'The input archive Dim passww As String = TextBox1.Text 'Archive password Using extr As New SevenZipExtractor(Infile, passww) extr.ExtractFile("02.ini", MSData) End Using Dim sr As StreamReader = New StreamReader(MSData) Dim textSsS As String = sr.ReadToEnd() ini02.Text = textSsS
I've made a simple webbrowser and now i want to be able to modify the text in a webpage. In the webpage source code I have something like this <td class="res">Hello</td> and I want to replace Hello with Hi, so people see Hi on their screen instead of Hello. How can I accomplish this?
I have a module which will be responsible for parsing CSV data received from different user via a website interface, and I have to parse that CSV. I was considering to use, TextFieldParser for it.
But before I could implement I was considering what shall be a better approach...
Generating MemoryStream from data received, or initialising a StringReader from the same input string.
in VB.NET How can i write a memory stream to browser.My memory stream object has data to build a PDF file.Now i want it to be rendered on browser.How to do that ?
is this possible to do in memory (so i can get rid of any disk IO)?:
If File.Exists("c:MyImage.png") Then File.Delete("c:MyImage.png") End If
[Code]....
This above code works great the first time then errors out on any successive attempts after that with the file being used by another process at the File.Delete line. The image is being generated for use as a mail attachment and i've only ever done it via a phyical file on the disk.
How to convert memorystream byte array to csv file. I have GetExport method that converts rpt file to excelformatted memorystream and then returns that as a byte array. Is there a way to convert this byte array to a csv file? Due to some reasons I can only pass this byte array back to calling function.
Public Function GetExport(ByVal reportID As ReportID) As Byte() Dim byteArray As Byte() = Nothing Using expRptDoc As ReportDocument = New ReportDocument() Dim rptFileName As String = Server.MapPath(ReportCommand.GetXMLReportPath(reportID)) expRptDoc.Load(rptFileName) [Code] .....
I am working on vb.net win form. My task is display the file names from a folder onto gridview control. when user clicks process button in my UI, all the file names present in gridview, the corresponding file has to be loaded onto memory stream buffer one after another and append the titles to the content of the file and save it in hard drive with _ed as a suffix to the file name.I am very basic programmer. I have done the following attempt and succeeded in displaying filenames onto gridview. But no idea of later part.
'Displaying files from a folder onto a gridview Dim inqueuePath As String = "C:UsersDesktopINQUEUE" Dim fileInfo() As String
I have a user interface app that allows you to drag/drop in files - and it turns them into HttpListener request POST's to another EXECUTABLE that I have running - let's call it BACKEND1. BACKEND1 will be running on a SERVER when this gets ready for production use. Lots and lots of users running the UI - all dragging in files - all getting POST'ed to BACKEND1 - with the file included as a memory stream in the POST. BACKEND1 responds to the UI with a "sequential" file number assigned to the file centrally on the server.
On the SERVER is also running another EXECUTABLE - let's call it BACKEND2. It's job is to work with the DRAG'd in files. Both BACKEND1 and BACKEND2 sit on the same SERVER. At the moment I am writing the memory stream to DISK in BACKEND1 - and POSTing the FILENAME to BACKEND2 for it to work on. Would it be better to not write the file in BACKEND1 but instead include it in the POST to BACKEND2 - where it can be written to DISK? Is having LARGE HTTP REQUEST's a burden when sent between two EXECUTABLES on the same machine?
My primary goal is to have a really available BACKEND1 talking the the UI instances running out in the world. I'm concerned that doing the file i/o in BACKEND1 is "expensive" - and I don't care about the performance of BACKEND2 as much. just looking for opinions. I guess ultimately I'll have to bench mark this myself in a production environment to get a real answer.
I have a function that accepts a string and generates an email attachment based on that string. It works fine for html pages, text documents, and so forth but I can not get it to generate a PDF file.
Code:
Public Sub SendMail _ ( _ ByVal strFrom As String _ [code]......
If I save the file attachment as Whatever.PDF i get the error that it was not encoded properly.I am using datadynamics active reports PDF exporter to generate the PDF
dim pdf as new datadynamics.activereports.export.pdf.pdfexport sendmail("from@", "to@", "test", "test", pdf.tostring, "pdf.pdf")
I think the problem is I am converting the PDF to a string, and then trying to convert it back to a PDF and attach it to the email but I am not 100% sure.
I am using iTextSharp with VB.Net to stamp images onto PDF documents. (Since this is not language specific I tagged for C#, too.)I have two applications using the process.The first uses the bytes from the memorystream to display the PDF documents online. This piece is working. The second uses the same function but instead saves the PDF to a file. This piece generates an invalid PDF.
I have seen some similar questions, but they are all creating a document initially and have a document object in the code. Their memory streams are corrupt from the outset. My code does not have a document object and my original memory stream opens fine.
Here is the place where I get the error: (I have to put the buffer from m into a new memory stream because the stamper in the fillPDF function defaults to closing the stream unless marked otherwise.)
Dim m As MemoryStream = PDFHelper.fillPDF(filename, Nothing, markers, "") Dim m2 As New MemoryStream(m.GetBuffer, 0, m.GetBuffer.Length) Dim f As FileStream = New FileStream("C: emp.pdf", FileMode.Create)
I have a user interface app that allows you to drag/drop in files - and it turns them into HttpListener request POST's to another EXECUTABLE that I have running - let's call it BACKEND1.BACKEND1 will be running on a SERVER when this gets ready for production use.Lots and lots of users running the UI - all dragging in files - all getting POST'ed to BACKEND1 - with the file included as a memory stream in the POST. BACKEND1 responds to the UI with a "sequential" file number assigned to the file centrally on the server.
On the SERVER is also running another EXECUTABLE - let's call it BACKEND2. It's job is to work with the DRAG'd in files.Both BACKEND1 and BACKEND2 sit on the same SERVER. At the moment I am writing the memory stream to DISK in BACKEND1 - and POSTing the FILENAME to BACKEND2 for it to work on.Would it be better to not write the file in BACKEND1 but instead include it in the POST to BACKEND2 - where it can be written to DISK?
Is having LARGE HTTP REQUEST's a burden when sent between two EXECUTABLES on the same machine?My primary goal is to have a really available BACKEND1 talking the the UI instances running out in the world. I'm concerned that doing the file i/o in BACKEND1 is "expensive" - and I don't care about the performance of BACKEND2 as much.
I don't know whether it is simple or not because i am new to programming. my requirement is : In my vb.net winform application, the filenames of the files present in "D:Project" willbe displayed in DataGridView1 control. Now I want to load these files one after another into memory stream buffer and add the headers("ID","Name","Class") to the content in the file. Then I want to save these files in "C:" with "_de" as suufix to the filename i.e.,sample_de.csv.
Public Sub imageload(ByVal index As Integer, ByRef imagedescription() As String) Dim da As New OleDbDataAdapter("Select Foto From Images where Photoindex = " & index & ";", Form1.baglanti) Dim dt As New DataTable Dim ms As New MemoryStream
[code]....
i was take "Parameter is not valid." error pff where is my mistake?
I cannot use Visual Basic 2008 at all. When I go to "new project" and choose "Windows Form Application" I get this error.I have tried multiple uninstall/reinstall with no result.A microsoft reply to this suggested that I needed: " .NET Framework 2.0 Service Pack 1 " I checked, and I did not have the .netframework 2.0 service Pack 1. When I tried to download and install the above from Microsoft.com, the istaller said that "it was not allowsed" and I was not able to install the service pack 1.
I tried Uninstalling net framework 3.5, 3.0, 2.0 and then reinstalling .netframework 2.0 sevice pack 1; then reinstalling Visual basic 2008 express edition. At the reinstall of Visual basic 2008, .netframework 2.0 sevice pack 1 is unistalled by .net framework service pack 2.When I check the foruims for simiar problems, the formus are mostly for Visual basic 5.0, or other programs that I do not have.
Here is the programs I have installed:
Operating system: Windows XP Microsoft .net framework 1.1 Microsoft .NET framwork 1.1 Hotfix(KB928366) Microsoft .Net Framework 2.0 Service Pack 2
[code]....
All the security updates and hotfixes for Widows XP.
I am writing an application that will use a OpenFileDialog control that will read a text file into memory and later process it.
I do have the following filter: Text files (*.txt)|*.txt|CSV files (*.csv)|*.csv|Spaced Text files (*.prn)|*.prn|All files (*.*)|*.*"
When I navigate to my test folder that contains a single .txt file, I see that file. When I change the filter to *.cvs that files goes disappears because it has a .txt extension. That is good. But when I select All files *.* it does not re appear? Why and how do I make it appear.
Im doing a text editor program for my course and im having real trouble working out how to load a menu to modify the text.ive added a menustrip and split off tools into:
and i want to find the avarge of the 1440 row ,start from down to up and find the max,then find the avarge for each 30 row and put them besid the data and find the max of these avarge like this max(od data)=---- max(averge)=-----
I'm trying to make it so you click on a button, you will be able to modify what is selected in a list box.I'm trying to learn from a book but this has been frustrating me and I have no idea how to even get started.(This is VB.Net 2003)
Is it possible for me to modify this area1.txt format to format as in area_modify.txt file take a look txt file for diffrent.... the area1.txt just simple report.
