Check If A MemoryStream Contains An Image Or A Text?
Mar 11, 2010The Clipboard class has very handy methods to check contents, like 'ContainsImage' and 'ContainsText'.How do I check if a MemoryStream contains an image or a text?
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Display An Image (from MemoryStream) And Some Text And A Button?
May 21, 2009This is interesting. We've spent the last day attempting to patch a problem with the following (legacy) code that continues to grow its process size. This is done in Visual Studio 2003.We have a form on which we display an image (from MemoryStream) and some text and a button. Nothing fancy. Looks something like this: Protected Overrides Sub OnLoad(ByVal e As System.EventArgs)
[Code]...
Now. We've tried very numerous things. We've discovered that Disposing does nothing, and, indeed, the IDisposable interface doesn't actually touch memory. If we don't create a new CJ5Form_PTOperatorAcknowledgement form each time, the process size does NOT grow. But loading a new image into that form still causes the process size to continually grow.
Load Image From IO.Memorystream?
Apr 17, 2009Ive a picture box on a webform. I want to load a picture into from a memorystream. The code im using :
If Me.ComboBox1.SelectedValue.ToString.Trim <> "System.Data.DataRowView" Then
Dim bmpTmp As Drawing.Bitmap = Drawing.Bitmap.FromFile(Me.ComboBox1.SelectedValue.ToString.Trim)
[Code]....
What I'm trying to do is convert a tiff image to a gif and display it in a picturebox on a webform. The source file is deffinatly be found as the commented out line which saves the file to the c: drive works perfectly. However I cant seem to get the picturebox to load with the memory stream.
Resize An Image In A MemoryStream?
Dec 5, 2010I wrote a piece of code that grabs a fileupload, puts it into a memory stream, converts the main pic, and thumbnail pic, then saves them as jpegs, then updates the database.
Everything works fine, except one little glitch. If the DPI is above 300 then the image doesn't save right. It get's pixelated and blury.
here is the code.
Dim fileLen As Integer
# Dim myStream As System.IO.Stream
# Dim ImgContentType As String
[Code].....
Wpf - Get Image From Resource Dll As MemoryStream?
Oct 24, 2011I use WPF and my program has images in a DLL resource file. I have this well working way to read in images from disk:
Private Function GetImageFromFile(ByVal fileName As String) As BitmapImage
Dim buffer As Byte() = IO.File.ReadAllBytes(fileName)
Dim memoryStream As New IO.MemoryStream(buffer)
[Code]....
Now, how can I get images in this MemoryStream-way from a DLL resource?
The basic problem: If I use simply the "bitmap.UriSource = whatever uri" way and load many images in sequence like an animation it builds up the memory. I tried with the above memorystream way and it worked perfectly fine, but then I store my images in a dll and I don't know how to do this trick. If anybody knows how to read many images from a managed dll without building up the memory
IDE :: Can Image.FromStream Method Take MemoryStream
Mar 31, 2011I have this program that extracts ole objects from my access database and tries to save them as jpeg images. I keep getting an error on this line:
View 6 RepliesGDI+ Error When Saving PictureBox Image To MemoryStream
Jun 22, 2010I'm getting GDI+ error when saving picturebox image to the database. My database is sql server with image datatype. Ideally when I browse image file to the picturebox then save using following code
[Code]...
"Value Cannot Be Null Parameter Name: Encoder" When Trying To Save An Image To Memorystream?
Jun 28, 2011i have an image in an bytearray. I convert thiy bytearray to an image an do a resize on it which works fine. But after that i want to convert it back to a bytearray and then i get a "Value Cannot be null Parameter name: encoder" Exception when trying to do a IMG.SAVE(MEMORYSTREAM, IMAGE.RAWFORMAT)
[Code]....
Read MemoryStream - Load Image Byte And Read It?
Feb 21, 2012ok i have image that i bind info in it and i want to read the info now from file (FileStream) its workbut i want to do it not from file so i need to use MemoryStreamhere the example that work and how i do it now how i make it work with MemoryStream (with byte = My.Resources or PictureBox1.image)
Using FS As New IO.FileStream(image, IO.FileMode.Open)
FS.Seek(0, IO.SeekOrigin.End)
While Not FS.ReadByte = Asc("|")
[code].....
.NET - Check If An Image Can Be Deleted Or Is Writable After Using It To Perform .net Image Scaling
May 4, 2011I've got an app where the user uploads an image and the app resizes the image three different ways based on different variables. They all use the same image. I can't check to see if it's done using the image so I wondered if there was a way to check to see if the file is writable. A small loop that exits once it becomes writable (or "deleteable"). Working out of VB.NET.
View 1 RepliesDraw Text To Image - Hit Save Again It Writes The Text To The Background Image On PbMenu1?
Sep 4, 2010I'm making a front end to dvdauthor.I have a picturebox which holds the menu background. In order to draw a textbutton on the background image I store the image in a hidden picturebox. So the text doesn't get drawn to the visible background.
Dim ctl As Control
For Each c As Control In pbMenu1.Controls
If c.GetType() Is GetType(TextBtn) Then[code]...
This works the first time. But if I hit save again it writes the text to the background image on pbMenu1.
Bitmap - .Net Check If Image Existing In Another Image?
Jun 5, 2012I Tried To Check If Part Of Image Existing In Another Image
Explanation:
full image:
[Code]...
Search Data From Database With Some Check Box And Text Box When User Select Check Box Specific Function
Dec 15, 2011My application is like this : i have to search my data from database with some check box and text box when user select check box specific function go on and then when user enters some range of value in textbox then the result will shown in data grid view after that i can print it by selecting data
my vb.net code is as follow:
Imports System.Data
Imports System.Data.SqlClient
Public Class XtraForm1
[CODE]............
I m also pasting the demo picture.
MemoryStream Uses Too Much RAM?
Jun 24, 2011I have a problem with a memory stream.
I extract from an archive a Jpeg that's about 256 Kb, load it into a memorystream and display it into a picturebox
when doing that, my app ram ussage grows with 50+ MB
Here's the code
zip.Encryption = EncryptionAlgorithm.WinZipAes128
zip.Password = MainFrm._Pass
Dim str As New MemoryStream
[Code]....
Get A Code That Will Load Text, The Correct Image To Match It And The Command For Each Image?
Jun 16, 2011I need a code that will load text, the correct image to match it and the command for each image. what i want to do is make a program that will download a swf and an image into to folders. then at startup the program will load all the swf and images and put the images into a listview so when you click on the image for the swf file it will give the link to the swf so it can be loaded.
View 1 RepliesAdd A Text String To An Image And Save The Original Metadata To The New Image?
Aug 20, 2010I try to add text strings to an image but keep the metadata of the original image. The problem is How can I save ImgMetaData (from the original image) to the new image?
Here are the codes:
Public ImgMetaData As BitmapMetadata
Public myImageCodecInfo As ImageCodecInfo
Public myEncoder As Encoder
[Code]....
Text And Image Manipulation In The Form Of Hiding Messages Within The Image?
Apr 1, 2010i have an assignemnt in my visual basic express 2008 class, were i have to type in an image name, like paris.jpeg,and automatically manipulate the file to be called paris-steg.png. Once this happens i click the manipulate image button and the image should be altered so that paris-steg.png has a message hidden in it. Then i have to decode that message. At this point im having troubel getting the file name to automatically appear as paris-steg.jpeg, and you will proabbly see why with my code. I need to know how to do this. The way i have it, i basiaclly add -steg.png onto the text typed into the text box, this doesnt work when the user types in paris.jpeg as it comes out as paris.jpeg-steg.png. heres the instructiosn and my code
(6) When the text file does not exist, alert the user with a message box and do not do any further processing.
(6) When the image file does not exist, alert the user with a message box and do not do any further processing.
[code]...
In this program you should read text from a file one character at a time instead of one line at a time. If <tt>sr</tt> is an IO.StreamReader, then <tt>sr.Read()</tt> will return an integer that is the value of the next character in the file. Use <tt>Read</tt> instead of <tt>ReadLine</tt> in this program.You can check whether a file exists by using the code <tt>IO.File.Exists(filename )</tt> . The function will return a Boolean value (True if the file exists but False if not).
You can check whether a string ends with a specified pattern by using the <tt>EndsWidth(pattern )</tt> function. For example, if <tt>s</tt> is a String, then <tt>s.EndsWidth(".txt")</tt> will return a Boolean value (True if <tt>s</tt> ends with the pattern but False otherwise).In a string, <tt>IndexOf(pattern )</tt> gives the first position where the pattern exists, but <tt>LastIndexOf</tt> gives the very last position where the pattern exists.The code <tt>s = Chr(i)</tt> converts the Integer <tt>i</tt> into a character and assigns the character to the string <tt>s</tt> .
Check If Image Contains Another Image?
Jul 22, 2011Here is the original image:Here is a portion of that image (zoomed in):What is the best way to check if the second image is part of the original image?
View 1 RepliesCheck A PIctureBox For No Image?
Feb 12, 2012I have a PictureBox on a VB form which I need to check in code to see if it does not contain an image.
View 7 RepliesCheck For Image Files?
Aug 24, 2010I have an image resized program and it works. The problem is when a user selects a non-image file in the file select dialog, it crashes. How can I check for image files?
View 4 RepliesCheck If A PictureBox Contains An Image?
Apr 16, 2009I'm using VB.NET forms app and I need to check if a PictureBox currently has an image in it. How would I do this?
View 1 RepliesCheck If Clipboard Has An Image?
Feb 15, 2010how to Check if clipboard has an image??
View 2 RepliesCheck Image In Picturebox?
Oct 27, 2009I need to check if a picturebox has an image in particular, to check an if condition. I allready try:
if picturebox1.image.equals(path) then
Do Something
else
[Code]....
How To Check The Of Image Size
Feb 1, 2010how to check the of image size if he strored in DB and Dispay In the PictureBox
View 2 RepliesHow To Check The Picturebox Have Image Or Not
Jul 14, 2010How to check the picturebox have image or not ?
View 1 Replies.net - BinaryFormatter.Serialize With MemoryStream?
Apr 25, 2011I am having an issue using BinaryFormatter.Serialize. I have this generic extension method to "clone" an object via binary serialization:
[Code]...
This is killing performance. Anything more that about 7 or 8 clones brings the app to a halt. Why would this happen? The USING block ought to ensure the MemoryString is disposed of, right? Shouldn't a new MemoryString be created each time? I would think since the same original Mode object is the source for the serialization, the MemoryString length would be the same.
Converting A Memorystream Into A Filestream?
Jul 5, 2011I'm working on a project to extract documents from a SQL Database and writing those documents to a network drive. However some of the files pointed at in the DB are encrypted files (RijndaelManaged)that reside on another network driveI have been able to retrieve, and decrypt the files using streams. Now aving problems saving or converting the Memorystream into an actual file.
Here is my code
Public
Sub ExtractDocument(ByVal ThisDocumentInfo
[code].....
Create A Disk From From A MemoryStream
Jul 6, 2011I'm working on a project in VB.Net (2010) where I'm extracting files from an Document Management System.The Files reside on the network, and information about the files are in a SQL 2005 Database and have been encrypted with the Encryption Stream (System. Security. Cryptography. Rijndael Managed)i have retrieved the file, and decrypted them, but I'm trying to find out how to write the stream back to a file.I know the file type (which is stored in a SQL DB)I can't find a solution in any of the VB files or the MS site.
View 2 RepliesCreating An Pdf From A Memorystream To A Web Browser
Aug 10, 2010I am dynamically creating an pdf from a memorystream to a web browser, using itextsharp. It is called via https and it works in IE and Firefox but not Safari or Opera. I don't care about Opera but I do want it to work in Safari though. If I make the call with http it does work (creates the pdf) in Safari but not https
The error I get is The error is: unknown error (CFURLErrorDomain:303).
Load Richtextbox From Memorystream. WPF/VB>NET?
Apr 16, 2010I have some trouble with loading a richtextbox from a memorystream.I have some data in a database table stored as a byte array, I convert it to a string and load it into a memorystream and then I want to load that memory stream in the richtextbox. The application breaks on
Dim tr As New TextRange(rtbTemplate.Document.ContentStart, rtbTemplate.Document.ContentEnd)
though.
[code].....