.net - Overlays Using Streams Resizes An Image?
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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Jun 22, 2010
I added an image as the background image for a form in VB.net. When I run the program, after approx. 5-6 seconds, the image partially overlays itself, as in an offset overlay of the underlying image. I never had this problem in VB6, but I did have it the other time I used a background image on a form in VB.Net.
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Nov 23, 2010
I've made a custom button and it works great, here's the
Imports System.Drawing.Drawing2D
Imports System.Drawing
Public Class DanButton
[code]....
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Jul 2, 2011
I have made an app that resizes images however in windows if you right click and slect properties on the image file there is a details tab and it has lots of data, time created, what model of camera, exposure settings ..... ect. How can i read this in my application? This does not bring in the items in the details list. The image is a tiff file
[Code]...
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Jun 3, 2012
I am trying to create a VB.net form application to visually fill in a floor plan with different colours according to reservation status.The basic floor plan is white and the idea is to colour in the various apartments in different colours depending on some variables.I have tried overlaying .png pictures on top of each other but this doesn't work due to the non-true nature of transparency in visual studio as soon as you overlay more than 2 PNGs.Not much more success with drawing polygons either.
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Feb 24, 2010
I have a mask bitmap (bmpMask) that I am drawing onto a destination bitmap (bmpDest). Both bitmaps have alpha channels but are already full of opaque content. What I want to do is produce transparent areas using GDI+ 'Draw...' methods on bmpMask so that bmpDest shows through when I draw bmpMask over it.Of course gMask.DrawLine(Pens.Transparent, 0, y, wMax, y) causes no change to bmpMask, because GDI+ works as designed and doesn't draw anything when transparent. Even with semitransparent colors, only the r,g,b values of bmpMask's pixels are updated.
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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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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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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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Jan 29, 2012
Has any one experienced this. Never seen it before. Anchoring a Toolstrip Left,Top,Right will resize the strip with out the option of stepping back and undoing it. Forces rolling back the application. Toolstrip is docked at the bottom.
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Jul 23, 2009
My rtb to be resized with the form...like windows notepad!
Original Form Size - 809; 699
Original RTB Size - 791 to 556
dim none as none
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Jun 8, 2010
i have un project and i want to make when i start the program it will auto get the old sizes the user had it on.
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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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Oct 13, 2010
I have a small program that works just fine on my desktop (23 inch monitor). I programmed it on this computer as well. My laptop (17 inch monitor) works fine also, however, on a 15 inch monitor the picturebox's are off and not where they were when I programmed it. Also, some forms you can not see the entire form and the bottom is cut off.
[Code]...
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Jun 15, 2010
When loading the form then my windows state is maximized (properties--windows state--maximized). After loading the form then if I press taskbar menu top(maximise button is disabled and minimize button is disabled on form) then size of form is changing. I have used screen.width,and height to restore when form resizes but still for the first time of form loading it moves and set to the boundaries. Atleast once also it should not move. How to stop changing the windows state from moving when we click task bar. Again in form properties -- application -- I have checked -- make single instance application. When if again any other path same form is opened. Then also it resizes to other state.
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Aug 4, 2009
For some reason, a certain Form in my project will change it's size all on it's own right after I call it. It's usually with small forms in the one I'm having a problem with is 95x25 pixels. The only thing on it is a Label with some text in the middle and this code
Public Class MessageForm
Private Time As Integer = 25
Private Sub fadeTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles fadeTimer.Tick
Time -= 1
[Code] .....
As you can see the Form is meant to be a small pop-up that disappears on its own, like a balloon tip. Anyways I just added it to my project 5 minutes ago and as soon as I tested it out by displaying it with Form.Show(), it randomly changed to 123 by something else during runtime. I checked all the Form properties for any kind of resize properties and only found AutoScaleMode which was set on font, but set on None made no difference. Like I said I just added this form and have no code affecting it whatsoever in my entire project except for Form.Show and the code on that form. For the moment I'm just resizing the form on it's own Load event, and that seems to work, but I'd like to know what is causing this random form resize.
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May 30, 2010
How can I have a single column resize with the form so that the ListView columns continue to fill the whole form?
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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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Jan 8, 2010
I want the ability to auto stretch the listview control column when the form gets resized in vb.net 2008 These are the properties I am mentioning for the ListView now :
ListView1.View = View.Details
'ListView1.GridLines = True
ListView1.FullRowSelect = True
[code]....
I am increasing the width of control and not columns as I wanted. I am unable to find anything else than width.
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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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Nov 21, 2009
How would i make so when the user resizes the form the controls on the form resizes to what ever(ex: form become full screen textbox is full screen.
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Aug 14, 2011
I'd like to verify if an image control has an image loaded . If it does , I want to unload that image (and load no image) , but if the image control has no image loaded , I want to load an image . Is it possible ?
If ImageMY.Image.Equals(Nothing) Then
ImageMY.Image = System.Drawing.Image.FromFile("C:ImageBlaBlaBla.jpg")
Else
[code].....
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Oct 11, 2011
I created a new cursor (it works properly, I tried it in windows 7) but is not working for me in the program.I took the Windows cursor (aero_helpsel_xl, from C:WindowsCursors) and it appears to me the same error.i use with this code:
Me.Cursor = New Cursor("Patch..")
The problem say:: "{"Image format is not valid. Image file may be corrupted.
Parameter name: stream "}"
edit: I realized what the problem ... It can read only cur files with 24-bit color and lower - but it shows only two colors: black and white.
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Jun 14, 2009
I have an app that loads a jpg into a picyure box, then updates exif data in exifworks classThe problem is that when I save the image(from image used for picture box) or class (to save exif data) then try to delete, sometimes I get success, others it won't allow delet I have gone to the trouble of using gc.collect, do events, put the delete in a timer & wait for the delete before continuing & still get the problem
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Sep 12, 2009
With a button click event, how do I make a picture box image property switch to a random image from the resources folder?
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Aug 28, 2010
i want to save image in ms access 2000 database & i want retrive it in a crystal report in vb.net 2005
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