All Questions
Tagged with memorystream bitmap
51 questions
0
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1
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194
views
Converting System.Drawing.Bitmap to a ImageSource memory stream to insert into a PdfSharpCore PdfDocument under Linux
I'm creating a barcode using DataMatrix.NetCore nuget package. I'm attempting to get that inserted into a PDF using PdfSharpCore. The barcode is generated and a bitmap is created, but the conversion ...
- 735
0
votes
0
answers
46
views
System.NotSupportedException on EndInit() after conversion to Bitmap from ByteArray
I select an image, apply some effects to pixels, then try to display it to the right of the original image. It's done via MemoryStream. Upon converting the array of bytes that contains processed ...
- 23
0
votes
1
answer
207
views
"Parameter is invalid" when saving Bitmap to MemoryStream
I have an array of bitmaps which need compiling into a single, multi-page tiff image, however when saving the bitmap to a MemoryStream object I get the "Parameter is invalid" error message ...
- 13
0
votes
0
answers
270
views
base64 string image been rotated in excel document c#
i have an excel document in which images get added on to. Some of my images loads correctly and some of them are been rotated on it own.
this is part of my code
if (!base64Image.IsNullOrEmpty())
...
- 121
0
votes
1
answer
517
views
Bitmap.Save erroring with Null Exception and yet it is clearly instantiated
Before an upgrade to Unity and Visual Studio I had a simple block of code that ran without errors, after the updates however the exact same logic raises a NullReferenceException.
The exception is ...
- 1,835
1
vote
1
answer
3k
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Convert PDF to Image Byte array to save to database
What I am trying to accomplish is allowing my user to upload a PDF. I will then convert that to an Image and get the Images byte array. Below is what I have so far.
PdfDocumentProcessor ...
- 258
0
votes
1
answer
399
views
ArgumentException: Parameter is not valid while copying from FileStream to MemoryStream
I am trying to resize image using bitmap from Memorystream and save to directory. It works on the first run but if i try to update the image second time i am getting ArgumentException.
public ...
- 160
0
votes
0
answers
935
views
How to compress a bitmap in c#
I have a code that takes a screenshot and I need to compress it in order to send it.
The following code converts a Bitmap into a stream and compresses it.
My problem is that the compression outcome is ...
- 1
0
votes
0
answers
148
views
Low quality bitmap copy of original bitmap becomes larger after lowering the quality
I am trying to create copies of an original image that is of lower quality than the original. And everything works with jpeg.
When working with bmp though - with the lowest quality I can set: 0. The ...
- 740
0
votes
1
answer
327
views
VB.net DownloadDataAsync to MemoryStream not working
I have the following code to load a picture from the internet directly into my picturebox (from memory):
PictureBox1.Image = New Bitmap(New IO.MemoryStream(New Net.WebClient().DownloadData("LINK")))
...
- 47
2
votes
1
answer
5k
views
Saving Bitmap to MemoryStream
I am trying to save a bitmap to a MemoryStream and then convert it to string. But the problem is, I am having an error that says the line img.Save(m, img.RawFormat); cannot be null. The error is this
...
- 29
-1
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2
answers
244
views
Bitmap throwing exception while read from MemoryStream using ms access [duplicate]
Im retrieving pictures from database, i want to display it to picturebox. getting exception "Not a valid parameter"
i already google it, and almost of it not solve my problem.
while (reader.Read())
{...
- 39
1
vote
1
answer
786
views
MemoryStream uses too much memory and doesn't dispose/close
The memory usage goes up until it hits System.OutOfMemory exception. The MemoryStream instances count goes up until exception as well. I tried using using(), doing ms.Dispose(), ms.Close(), few other ...
0
votes
2
answers
1k
views
c# cannot use memory stream to convert byte array to bitmap
I have been looking for days now and all the current answers on how to convert a byte[] filled with imageData leads me back to this piece of code:
using (var ms = new MemoryStream(byte[]))
{
...
-1
votes
2
answers
1k
views
Issue Converting Bytes to an Image from a PDF file
I am trying to convert a pdf file to a Bitmap by first getting the Bytes of the PDF file and then converting it into a MemoryStream to Be converted into the Bitmap.
This worked successfully when ...
- 11
1
vote
0
answers
622
views
Back color changed to black while converting a bitmap to memorystream and then back to Bitmap
I face an issue. I am trying to convert the Bitmap image into a memoryStream and store it. When converting the memoryStream back to image the background is becoming black
ms = new MemoryStream();
frm....
0
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0
answers
422
views
WCF: using memorystream to transfer bitmaps in C#
I am using WCF for communication between client and server program on the same machine. Earlier I used Bitmaps to transfer video frames to the client. It was successful with WCF, but I only have 6 ...
- 31
0
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0
answers
338
views
Memorystream - OutOfMemoryException
It might be that this question has been answered before, but I found no good solution to my problem.
I am trying to convert a Bitmap to a bytearray using a memory stream, but when I do so I get an ...
0
votes
1
answer
784
views
C# Bitmap Image - Exception : Parameter is not valid
I try to work with Image. It worked well but sometimes I got “Parameter is not valid” exception. I don't know why that problem occurs, please help me:
byte[] img = (byte[])PatientData.Rows[index - 1][...
- 135
0
votes
1
answer
257
views
Keeping MemoryStream open or clone image
I'm reading images from a database.
I read the binary / blob for a field, and I convert it to an image like this:
Public Function BytesToImage(ByVal ByteArr() As Byte) As Image
If ByteArr....
- 11.3k
0
votes
0
answers
44
views
Bitmap A generic error or parameter is not valid [duplicate]
I have a fallowing method which raises exceptions depending on stream size. I have a feeling that the problem is memory limits. Can someone explain me why i get those errors and how to fix this?
...
0
votes
0
answers
44
views
Exception message when using MemoryStream to an Array [duplicate]
I keep getting an exception message
Value Cannot Be Null Parameter name : Encoder
Which seems to be triggered by the line starting
"picture Box3.Image.Save(ms...." etc.
I am using ...
- 13
0
votes
0
answers
622
views
C# : Get Source of Image from Memory over Bitmap and BitmapImage
-I am trying to write a method for a Card Scanner and I am quite new in C# :)
-The application I wrote can scan and gets the images from the Scanner, but I can not show them on the WPF.
-The SDK is ...
- 1
3
votes
1
answer
2k
views
How to convert System.Windows.Media.DrawingImage into Stream?
I'am trying convert DrawingImage into MemoryStream. My code looks like this:
public MemoryStream ImageStream(DrawingImage drawingImage)
{
MemoryStream stream = new MemoryStream();
...
- 395
0
votes
1
answer
1k
views
Image data loss when converting to byte array
I'm trying to use a MemoryStream to turn an image into a byte array, however, the image looks different when I recover it.
I made a simple Form app to show the issue. I'm using the google chrome Icon ...
- 23.5k
1
vote
1
answer
3k
views
Parameter is not valid. Stack Trace at System.Drawing.Bitmap..ctor(Stream stream)
For some cases only i'm getting this error. "Parameter is not valid Stack Trace at System.Drawing.Bitmap..ctor(Stream stream)" i am little confused how it is working for some records why not for ...
- 75
0
votes
0
answers
142
views
Convert Base64 from PDF to Bitmap [duplicate]
I would like to convert a PDF to a Bitmap, so I can show it on my ASP.NET page. But when I run my code it fails at creating the Bitmap.
Does anyone know what's the problem?
string filepath = "C:\\...
- 9
6
votes
2
answers
6k
views
Reduce image size in C#
I want function which will reduce image size.
The function should take the image URL, check is image 4MB size or bigger and if it is then resize it to lover then 4MB and return bytes.
I have next ...
- 2,282
1
vote
1
answer
2k
views
Bitmap.Save() method is not working in Unity source
I wanna implement 'Bitmap to Texture2D' function in Unity.
I learned to make Texture2D instance, use this syntax below.
// **LoadImage(byte[] arr)** can load byte array data and make Texture2D
var ...
- 95
0
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0
answers
870
views
C# Bitmap / MemoryStream lock issue
I have presumably tried over 15 different techniques to convert a TIFF to a Bitmap, yet all already succed with a 99% chance. In 1% of all cases the Bitmap will be locked and I will face an Exception ...
- 429
3
votes
3
answers
7k
views
How to insert a dynamically generated bitmap into PDF document using PDFsharp?
I am trying to use PDFsharp to insert a dynamically generated bitmap of a QR Code in to a PDF document. I don't want to save the bitmap to the file but just want to insert it into the PDF. The ...
- 227
0
votes
1
answer
1k
views
Parameter is not valid when using MemoryStream
I'm making some Bitmap image manipulation application in c# so I need to implicitly convert image to bmp so I can manipulate it like byte[] (byte array). Problem appears when this image is not bmp ...
3
votes
1
answer
3k
views
argumentnullexception bitmap save to memorystream
I'm trying to save my Bitmap to MemoryStream - what wrong in this code? Why it gets me argumentnullexception ??
private void insertBarCodesToPDF(Bitmap barcode)
{
.......
...
- 946
1
vote
1
answer
395
views
parameter not valid at saving bitmap
I'm resizing an image using the following code:
private void ResizeImage(string path)
{
var maxWidth = 700;
var ms = new MemoryStream(System.IO.File.ReadAllBytes(Server.MapPath(...
- 4,673
0
votes
2
answers
2k
views
Size of bitmap byte[] differs from BMP memorystream size
I´m trying to send a bitmap over a tcp/ip connection. So far my programm works as it should. But during debugging I discovered a strange value of my bitmap byte[].
I open a 24bit bitmap and convert ...
- 631
2
votes
0
answers
3k
views
ASP.NET [ExternalException (0x80004005): A generic error occurred in GDI+.] at bitmap.Save(MStream, ImageFormat.Tiff)
I've read hundreds of "A generic error occurred in GDI+" posts and can't quite get the issue straightened out. I'm trying to insert a page and then apply some text to each page of a multi-page tiff.
...
- 153
2
votes
2
answers
2k
views
Loading saved byte array to memory stream causes out of memory exception
At some point in my program the user selects a bitmap to use as the background image of a Panel object. When the user does this, the program immediately draws the panel with the background image and ...
- 1,431
-3
votes
2
answers
861
views
Memory out of Exception while creating Bitmap from MemoryStream in WinCE Device
using (MemoryStream ms = imager.CaptureImageNow().MemoryStream )
{
using (Bitmap bmp = new Bitmap(ms)) // Memory Out of Exception occurs here
{
this.PreviewImage( bmp );
}
}
Hi ,...
0
votes
0
answers
601
views
new Bitmap(MemoryStream ms) returns upside-down image
I have two byte[] - representations of bitmap - one from bitmap.save(ms), ms.toarray, and the other from a bunch of other functions. According to my eyes that witnessed output of Watch windows, these ...
- 155
0
votes
1
answer
793
views
how to write byte[] to Image with Landscape or Portrait properties?
I have a code which converts byte[] to image but my code always writes in Landscape mode even original image was Portrait. How can I detect original image's Page Orientation and write new Image with ...
- 3,204
0
votes
2
answers
3k
views
C# MemoryStream slowing programme performance
I'm working on a project using WPF to display the Kinect ColorImageFrame and a skeleton representation. I also have to record those two videos.
I'm able to display and record (using EmguCV) those two ...
- 934
2
votes
2
answers
776
views
Cropping Centre of Image Stored In A MemoryStream
I have an image upload form that stores two sizes of images: Large and Thumbnail image.
For the thumbnail image, I am trying to crop image from the center and re-size to: 30px x 30px.
Here is my ...
- 2,199
1
vote
1
answer
462
views
System.ArgumentException at System.Drawing.ImageFromStream
Ok, so I've seen multiple people with this issue, and I've found to some extent what might be causing the issue, but I can't figure out how to fix it. Basically, I'm trying to send a screenshot from a ...
- 81
4
votes
1
answer
3k
views
A generic error occurred in GDI+ when I saving png to MemoryStream in IIS7
I have an error when I try save png to memory stream. On my ASP.NET Development Server everything works but when I run site under IIS7 - there are generated an error. Also when I try saving jpg format ...
- 175
1
vote
2
answers
2k
views
No transparency in Bitmap when loading from MemoryStream
When I am writing a Bitmap to a file and read from the file, I am getting the transparency correctly.
using (Bitmap bmp = new Bitmap(2, 2))
{
Color col = Color.FromArgb(1, 2, 3, 4);
bmp....
2
votes
1
answer
2k
views
Image crop not working correctly
The snippet of code is supposed to crop an image, however the size of the crop is correct, but the crop starts at the top left corner. These images illustrate the problem more clearly and .
The co-...
- 8,724
4
votes
3
answers
4k
views
Why is there a memory leak when I do not .Dispose() Bitmaps that I .Save() to a MemoryStream?
Say I create a Bitmap
Bitmap bitmap = new Bitmap(320, 200);
When I write it to some stream (in my case, it's a HttpResponseStream, as given out by HttpListenerResponse), everything is fine:
bitmap....
- 19.2k
41
votes
2
answers
101k
views
Saving a bitmap into a MemoryStream
Should I allocate the memory or just the object of the memory stream:
Is this OK?
MemoryStream memoryStream = new MemoryStream();
bitmap.Save(memoryStream, System.Drawing.Imaging.ImageFormat.Jpeg);
...
- 1,774
2
votes
1
answer
3k
views
A generic error occurred in GDI+ exception when trying to save image into MemoryStream
I am using C# windows form.
My code :
private void Openbutton_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog()...
- 4,967
0
votes
2
answers
1k
views
Converting Bitmap to Binary Array performance
I do have a Bitmap Array that contains more than 500 Bitmaps object. I need to convert each single Bitmap object within the Array into a binary Array. I'm using the MemoryStream class to achieve this:
...
- 307