VS 2010 Working With Streams?
Mar 23, 2012
I am serializing and deserializing a class - and sending it around with httplisteners - code looks like this Dim inputstream As Stream = request.InputStream()Deserialize(FSOb, inputstream)With the Deserialize function looking like this (and the Serialize as well - it deals with a memorystream)
Public Sub Deserialize(ByRef FSOb As FSObject, ByRef st As Stream)
Dim bf As New BinaryFormatter()
FSOb = CType(bf.Deserialize(st), FSObject)
End Sub
[Code]...
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Jun 24, 2009
I have this code for compressing datasets into files:
Using fs As New System.IO.FileStream(flnm, IO.FileMode.OpenOrCreate, IO.FileAccess.Write, IO.FileShare.Write)
Using zStrm As New System.IO.Compression.GZipStream(fs,
[code].....
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Dec 28, 2009
I found that the overlay function was working fine. However, it seems that if I use the overlay function while reading an image from a stream, that it would enlarge the picture before overlaying it.
ie:
overlay = New Bitmap(stream)
g.DrawImage(overlay, 0, 0)
Seems to enlarge the image before overlaying it, whereas this:
overlay = New Bitmap(My.Resources.Pic)
g.DrawImage(overlay, 0, 0)
Seems to overlay the image fine.
What could be the reason for this?
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Dec 20, 2011
I am new to .NET from VB6. So I do not have any background with streams, however the concept seems straight forward. I am trying to populate a listbox using the ADD method with the data originating in a text file. Using a stream reader I am aquiring the data (I can prove that the data is there at every itteration using the debugging tools). However, it doesn't make it into the listbox. I have other data appear withn the listbox in a couple of different ways just to prove that there is nothing wrong with the way the listbox is setup or coded. The listbox is a single instance item on a form, all setup is done through the properties window.
[Code]....
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Nov 12, 2011
I experimenting with the Twitter streaming api, an am trying to open a stream for a user to consume events as they happen. I using a standard set of classes for making REST api calls to twitter. When using url... in a "GET" call the response stream never ends.I'm opening a StreamReader and reading the response as I would with any other REST call to Twitter. This is probably obvious to others, but how do I "consume" this stream... Is there a way to read the StreamReader as it's reading (meaning before it closes)? or maybe there a different method I can user to consume this stream.... again, I apologize if this seams to be elementary to some, but I can't figure it out at the moment. Here is the original source I started troubleshooting this with.This method was fabricated from a set of C# Classes I found in a forum on LinkedIn. At the line that reads "responseData = responseReader.ReadToEnd()" the method starts to "drink" the stream... but do so like a bottomless cup... reading this stream of data in real time before it closes (which is essentially until I stop debugging or kill the process) is the question I'm tackling.[code]
This write the opened twitter stream to the file, and every time I Tweet, Retweet, Delete, Direct Message... and so on.The file grows with a JSON object appended to the text. I used the Do While 0 < 1 for testing here, because I just wanted to see it working. I see on MSDN StreamReader Constructor Description that the New constructor is supposed to accept a Boolean value for "leaveOpen", but no such argument allowed when I try to add this to the constructor.Does anyone have a good example of how to do this with forcing and infinite loop or just a better approach than this... I would like to simply read new updates sent each time from Twitter, and address them accordingly? There is obviously a way, I'm just new to the concept of consuming a stream like this with out it being closed.
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Aug 16, 2010
I want to be able to take snapshots of the desktop periodically(about 1 every 300 ms) then be able to view them live through a web browser.
Here is what I already have:
I already have a form which takes the snapshots, overwrites a file called 1.jpg with the image. I also already have an http server running which succesfully serves up html documents.[code]...
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Apr 18, 2010
I build an application that has two forms; one gets an employee info and stores in on a txt file (I accomplished that) and the other for viewing the records and searching for a record. I'm having troubles with viewing the records one by one when I click on the "Next Record" button.
The code below is only for view form
vb.net
Imports System.IO
Public Class frmView
'Dim strFilename As String
[Code] .....
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Feb 21, 2009
am programming a media player in VB.Net using the Microsoft.DirectX.AudioVideoPlayback namespace. I would like to be able to play video files which have multiple audio streams (eg. several languages or commentary) and select which audio stream to play. As far as I can tell the Video and Audio classes don't provide this functionality.
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Dec 15, 2009
I have written a simple module to access NTFS Alternate Data Streams (ADS), which looks like this:
Imports System.IO
Module Module_ADS ' Alternate Data Streams
Private Const GENERIC_ALL As Int32 = &H10000000
[code]....
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Aug 2, 2011
I have a system which needs to be secure which streams relatively large documents from a webservice to a proxy (Web site) whch then grabs the stream and pushes this to the client. This works but there are some issues where it seems the response is not being pushed until the entire stream is complete? whether this is the case Im not sure have run charles and until it completes it is "Waiting for response".
The documents are currently PDF but it needs to handle many other types for the future. The octet stream etc is mostly testing related, how to get the Dialog to show - saying save as? for the large files the little ones don't matter to much but the big ones leave a big waiting period with no response.
Dim IncomingResponse As HttpWebResponse = DirectCast(Request.GetResponse(), HttpWebResponse)
Dim IncomingStream = IncomingResponse.GetResponseStream()
Dim BufferSize As Integer = 65536
Dim Buffer(BufferSize) As Byte
[code].....................
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Mar 22, 2010
I have a client sending data to a server using a Serialized Structure. I get a rather...nasty stack trace message that I can't begin to figure out why it's doing what it is. Here's that Stack Trace:
[Code]....
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Jun 21, 2012
I've used this function to send email successfully
Private Function SendEMail(ByVal wholist As String, ByVal emailcontent As String) As Boolean
Dim emailSuccess As Boolean = False
Try
[Code]....
But with a new server my customer has that uses EXCHANGE 2010 it does not work.
I used TELNET to get into port 25 of the exchange server and it seems that it gets a CLIENT WAS NOT AUTHENTICATED error.
Anyone use SMTP with EXCHANGE 2010 yet???
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Apr 20, 2012
In this case GDI no longer stands for Graphic Device Interface! I have an MDI form, and the child form loads up with a single panel positioned at a specific spot so that i can have a visual studio styled menu on the left side. The square white area is the panel with the fields in it for the user to enter. The left side is a TreeView with GDI lines drawn around it that dont appear until the menu has been changed. Here's what the menu looks like when its rendered properly:
When the form first loads, you can quickly see the GDI drawings come up (sometimes) then disappear. It flashes pretty quick when you can actually see it, but until you change the menu item to another causing it to redraw, its just... gone.. Looks like this:Here's the setup:I have two labels docked at the top for the large white text with a black background
There's the treeview on the left in a picturebox where the GDI components are drawn, and a panel touching it on the right side, which is sized and anchored on all sides basically keeping it stretched to the size of the window while keeping the top and left side pinned in position so it doesnt move, keep it touching the menu on the left.
Inside the panel is 10 more panels, one panel for each menu item. Each panel is programmatically set to resize to 1024x768 and becomes visible once the menu item for that panel is clicked. The panels are all programmatically top positioned at 0 and left positioned at -1 to hide the left border stroke from having the BorderStyle set to FixedSingle. Moving it to -1 hides only that border within the panel its in.
I have dual monitors, so i began stepping through the code on one monitor with the program running on the other so i could see what its doing with each step. While going through, at one point i see the contents of the TreeView completely vanish, but all the drawn GDI stuff is there. Once i get through everything and finally hit F8 on the very last line when control of the program is given back to me because its now waiting for me to do something, all of a sudden the treeview contents re-appear and the GDI drawings vanish.
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Apr 20, 2010
I just upgraded a project from VB 2008 to VB 2010. Before, the project did not use LINQ. I have started implementing it. So, I have updated the target framework from 2.0 to 3.5, and added a reference to System.Core, and imported the namespace System.LINQ to the entire project and also imported System.Data.LINQ into the form I'm working with (because it was not available in the list for Imported Namespaces in the references tab).
It's not throwing any errors now, but my IntelliSense is not working for LINQ stuff.
For example... I write this:
[CODE]....................
Then, if I type S. on the next line, the IntelliSense doesn't grab what it should for S (Only get Equals, GetHashCode, GetType, ReferenceEquals, and ToString, instead of the options I should get like Count, First, FirstOrDefault, etc...). If I Type S.First. then its the same thing, no IntelliSense that lists the available fields for S, just the standard options (Equals, GetHashCode, GetType, ReferenceEquals, and ToString). I should be seeing my column names in my table when I type S.FirstOrDefault.
So any ideas what is going on? When I type the code, for example, MessageBox.Show(S.FirstOrDefault.FirstName), it works perfectly. But it doesn't change the casing of the text (so it would read s.firstordefault.firstname) and no intellisense while doing it. But no errors. BTW - Everything works perfectly when creating a NEW VS 2010 application, it's just my projects upgraded from Visual Basic 2008 that have this issue.
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Jun 23, 2010
I recently got microsoft expression studio and VS 2010..To test out expression, i created a sweet looking UI, and transferred an old program from VS 2008, but the CSV writing function I have written in the '08 doesn't work with my WPF form in '10.
CODE
Private Sub ReadTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ReadTimer.Tick
CurrentPosition.Read()
CurrentPositionValue.Text = CurrentPosition.Values(0).ToString()
[code]....
specifically, the error is, "Computer is not a member of My" ....
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Jan 17, 2012
I'm setting the Image & BackgroundImageLayout properties of a PictureBox programatically, but it's not working. I set the layout to Stretch to fill the picturebox, but the image just displays in it's original size. Here's the code I am using:
[Code]...
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Jun 16, 2010
but i used this to check if its true
Dim returnValue As String = html
Label4.Text = html
If Label4.Text = "true" Then
[code].....
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Apr 9, 2011
The code im using:
MsgBox(ListBox3.Items(i).ToString.ToLower)
MsgBox(clientdata.Split(":")(1).Split("|")(1).ToString.ToLower)
If ListBox3.Items(i).ToString.ToLower = clientdata.Split(":")(1).Split("|")(1).ToString.ToLower Then
else
[code].....
Now the weird part is that it goes to the Else case, while the 2 variables in the If are the same.
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May 21, 2012
I found someone's code that they posted on YouTube for a file exists. Now, with their setup it worked fine, but I am trying to search the ENTIRE computer. Not just the application folder, and I can't seem to get it to work.
[Code]...
Using that code I can search for the specified folder and if the file exists it changes the text. Now this works, but I would like to search everything in My Computer at once.
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Mar 3, 2012
[code]Well, the first GetPixel works fine, it sets textbox2 to yellow if the pixel is ofund and textbox1 says green. But, the second GetPixel doesn't work. The coordinate are correct and the color is also, but I never receive the msgbox.
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Nov 20, 2011
my program connect to Access DataBase 2003 ! in my computer every thing be ok !but in other pc my program can not open on show this message :
my OS is 7!my VS version is 2010 and it is my connection string : "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + My.Application.Info.DirectoryPath + "my_db.mdb" where is my problem ?
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Jun 27, 2011
I have form1 and form2. On form 2 i have 2 combo boxes where the user is asked to make selections. once back on form1 i try to use those selections as part of an if statement but although i should be triggring them it does not. I cannot figure this out. I have set up test variables and msgboxes along the way to test this.
The code excecutes. I have double checked the variables on form 2. They just do not trigger a response that will enter the if statements even though it looks like they should. I have double checked that test1 and test 2 are grabbing the variables from form 2
test1 is "Male"
test2 is "10 - 19"
When the code excecutes i never get to the msgbox("Age") line of code. I have also tried taking the spaces out of the strings with no luck as well.
[Code]...
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Dec 11, 2011
[code]why this code dosnt work? the if statment dont excute it work only if it's like this [code]
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Dec 24, 2010
I've got a button in my app's window that I'm trying to click with code but it isn't working. I googled and found out to do this (in an MSDN document I think):
[Code]...
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Nov 5, 2010
I wrote following code to copy a range from a workbook to another one:
xlSheet.Range(cell1, cell2).Copy()
xlThisSheet.Range("A1").Select()
xlThisSheet.Range("A1").PasteSpecial(Excel.XlPasteType.xlPasteValues, Excel.XlPasteSpecialOperation.xlPasteSpecialOperationNone)
xlThisSheet.Application.CutCopyMode = False
but in new sheet I find exactly same formatting reported in the first one.How can I do to report only values?
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Feb 13, 2012
So I created a store procedure on my Sql Server 2008.
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May 30, 2011
I am trying to check if the string starts with certain words before I even add it to my item list, but it doesn't seem to return true even when it should return true.. File I am reading through with my application:
[Constructor.ReplicationHandler]
MeshNames=(ConvexMeshName="",StaticMeshName="52325332",EmitterClassName"")
MeshNames=(ConvexMeshName="",StaticMeshName="3255232",EmitterClassName"")
MeshNames=(ConvexMeshName="",StaticMeshName="644363",EmitterClassName"")
MeshNames=(ConvexMeshName="",StaticMeshName="4636434621646",EmitterClassName"")
MeshNames=(ConvexMeshName="",StaticMeshName="2626352",EmitterClassName"")
[Code]...
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Apr 13, 2012
OK, so my accumulator is now adding and showing properly in the form as a total. However, something is wrong in my if... then statement and it's not throwing it to the 2nd level after reaching the 125.*Edit to show updated with the Do While Loop. Now causing issues with my input error msgbox... *
do while decTotalCredits < 125
If IsNumeric(txtCredit.Text) Then
' This statement will convert the string entered to decimal and establish the
[code].....
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Apr 8, 2011
We had our Crystal Reports report sheets in 2008 working and when we moved to 2010, some of them which their datasources were binded to dataset and datatables are not working.
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Dec 28, 2010
The following code worked fine in MS Office 2007 PowerPoint Macro.However, in 2010 it crashes at the line "For each cht in..Function CopySheetChart(Sheet As Excel.Worksheet, Row As Integer, Col As Integer, _
Workbookname As String) As Boolean
' Copy the Excel sheet that has top left copy to RowOffset from the page header, and column Col
Dim Cht As Excel.ChartObject
[Code]...
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