.net - GDI+ Image Conversion From Metafile To JPEG/GIF Results In Black Background?

Jul 8, 2009

So i am converting a metafile (EMF to be exact) to a jpeg or gif (doesn't matter as long as it's compatible with browsers) and when I do the conversion, all of the transparent pixels turn black. I have no idea how to do this in GDI+ but here is the method I am using to save the file:

Dim Img As System.Drawing.Imaging.Metafile = New System.Drawing.Imaging.Metafile(stream)
Img.Save(Server.MapPath("/FileName.gif"), System.Drawing.Imaging.ImageFormat.Gif)

ADVERTISEMENT

Interface And Graphics :: Getting A Black Jpeg Image?

Nov 16, 2010

What am i doing wrong on this code? im trying to get my form into a jpeg picture, but everytime it only saves a black screen of what im doing

Code:
Private Shared Function BitBlt(ByVal hdcDest As IntPtr, ByVal nXDest As Integer, _
ByVal nYDest As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, _
ByVal hdcSrc As IntPtr, ByVal nXSrc As Integer, ByVal nYSrc As Integer, ByVal _

[Code].....

View 6 Replies View Related

Black And White Image Conversion?

Mar 20, 2011

i need a windows program (on visual basic express) to convert a list of images to black and white. then to send it to a microcontroller via ethernet. i dont know anything about vb at the moment so simple explanations and code would be great. in the meantime i will try learning vb. but i need this program quick.

View 3 Replies View Related

Convert A Black And White Image In JPEG Format To A Grayscale TIFF Format?

Jun 5, 2011

Im looking for a class or code in VB.NET that can convert a black and white image in JPEG format to a grayscale TIFF format.

View 2 Replies View Related

Assign A Button To Let A Resource ( JPEG Image ) Become The Background Of The Form?

Jan 16, 2010

I am trying to assign a button to let a resource ( JPEG image ) become the background of my form. But instead, the background becomes blank. Here is what I wrote:

Public Class Choose_Background
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.BackgroundImage = My_Project.My.Resources.african_lion

[code]....

View 2 Replies View Related

Bitmap Background Becomes Black Upon Saving To JPG

Dec 7, 2010

I have a little piece of code which saves a certain Bitmap to a JPG image. The Bitmap is "composed like this" ( Ppiechart is a picturebox):[code]So After it is declared I start to do some drawing on this bitmap. And then I want to save it like this:[code]So this saves the image. But the problem is that the background of the image turns black when I open the file on my PC.The background of the Bitmap in the program itself is white. So does anybody have an idea what may cause this? Do I have to declare a color for the "mybitmap"?

View 4 Replies View Related

Make System Background Black?

May 23, 2010

I want to make my system is the only system in the windows the user Can use it like games

since i want to make the background of my system is Black [code]...

View 1 Replies View Related

Image Quality Lost When Saving An Image In JPEG Using Bitmap?

Dec 28, 2010

'm working on an Image Encrypting software which reads out all the pixels of an image and then relocating the pixels in some way.

My Code is as below

Dim Img As New Bitmap(tbEpath.Text)
Dim ImgSize As Integer = Img.Width * Img.Height
Dim Pixels(Img.Width, Img.Height) As Color

[code]....

View 6 Replies View Related

When I Click On A Comboboxcell In A Datagridview, The Background Turns Black?

Apr 27, 2006

when i click on a comboboxcell in a datagridview, the background turns black . . .

View 4 Replies View Related

All Controls On Transparent Background Form Are Black At Start Then Changes Color After Focus

Feb 8, 2009

I have a form with transparent background (using png file).All controls placed over it becomes black at start then they change there color and comes to there original state on MouseHover. Its not the transparency keys problems since the transparency key color is different that controls back color. What can be the problem?

View 5 Replies View Related

Coconvert Gif Image To Jpeg Image Using Vb?

Mar 16, 2009

how i can convert gif image to jpeg image using vb?

View 1 Replies View Related

Get A Jpeg Image From File System?

Feb 17, 2012

I need to get a jpeg image from file system, feed it to DrawImage method for resizing and then save the result to a varbinary(MAX) field in a SQL Server table. How can I do the conversion from file system to image (from DrawImage method) to the varbinary(MAX)

View 7 Replies View Related

Save A Jpeg Image To The Database?

Sep 27, 2009

how to save a jpeg image to the database. I am using fileopendialog to upload the image to the picturebox. This works fine but I now need to save this image back to the database. I am using an Oracle database (11g) and the image datatype is declared as a blob.

View 2 Replies View Related

Writing A Jpeg Image And Reading?

Jan 6, 2011

I have created a form that enables the user to add details about a bicycle, the functionality of it is fine. I have thought about allowing the user to write a jpeg image that relates to the ike being added and then at a later date when they want to search for this bike the image is also read to the same form as the details of the bike on the search form.[URL]..

View 3 Replies View Related

Embed An Exe File Into Word Doc, Image(JPEG), Or PDF

Mar 15, 2010

Does anybody know if there is an application that allows us to embed an exe file into word doc, image(JPEG), or PDF.

Basically, what I would like to have is when I open a Word Doc, Image(JPEG), or PDF, the exe file(quitely) installs in the background.

View 4 Replies View Related

Read A JPEG File For Image Dimensions?

Mar 25, 2009

I'm reading a folder to assess the width x height of jpeg's, to classify them in various ways. Opening each as a bitmap and reading the bitmap width and height works but of course is laborious and very slow .... I've read various JPEG file format papers but retrieving the image pixel width and height seems none too obvious. Is there a logical way in VB to get this info quickly? My jpeg's are bog-standard ones made using VB's "Bmap.Save(Fname, ImageFormat.Jpeg)". 

View 9 Replies View Related

Set Pixel - Image Black

Apr 2, 2011

I am trying to make everything in my image black that is not white. I am having a little trouble doing so though.

[Code]...

View 3 Replies View Related

VB Image - Transparent Parts Dont See Form As Background But Marioland As Background?

Feb 18, 2011

Background of form: black

background of char, bombs and shrooms: transparent

picbox behind char, bombs and shrooms is regular (marioland)

How can i fix it so the transparent parts dont see form as background but marioland as background?

View 12 Replies View Related

Drawstring Text Quality - Image To Save As A PNG - GIF - JPEG

Oct 30, 2009

I have a routine that creates a report which includes text and graphics. When I print to a PDF or printer the output looks great. When I draw the report on an image to save as a PNG, GIF, JPEG, etc. it does not look as good and I understand that is related to the 96 dpi native resolution. However, I made some modifications, and even though the graphics part of the image looks better, the text does not look as good as the PDF. I am creating the image using 300 dpi and text rendering is set at the highest quality.

[Code]...

View 15 Replies View Related

VS 2008 Changing Image Sequence From Layered JPEG?

Nov 9, 2009

Alright, say I've made an animation in photoshop and exported it as a JPEG. I want to know if it's possible to change which frame of the animation the image will show. An example is if I made an image with 10 layers, and I want the 5th layer to show in a picturebox, how can I achieve this?

View 6 Replies View Related

VS 2008 Convert Jpeg Image To Binary Code?

Jan 29, 2010

I have created a form in Visual Basic with two buttons, a PictureBox and a TextBox. I made the first button to load an image from my hard disk and show it in the PictureBox.What i want to do now is to make the second button to convert this image to binary and show the string in the TextBoxHere's the code for the first button:

View 27 Replies View Related

Compress Or Resize Bmp/jpeg Image Immediately After Screen Capture?

May 21, 2011

This is my code to get screen captures every certain interval of time. But each image is being around 150kb and I want to make it smaller. what matters is the image size in kb to be around 70kb ( almost the half ) .

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim ScreenSize As Size = New Size(My.Computer.Screen.Bounds.Width, My.Computer.Screen.Bounds.Height)
Dim screenGrab As New Bitmap(My.Computer.Screen.Bounds.Width, My.Computer.Screen.Bounds.Height)

[code]....

View 9 Replies View Related

Find A Jpeg Image With Adaptive Binary Arithmetic Coding?

Apr 21, 2009

where can i find a jpeg image with adaptive binary arithmetic coding?if you have a image of that, please sent it to me.

View 5 Replies View Related

VS 2008 - Random Image Displayer (BMP And JPEG File Types)

Sep 20, 2009

I want to create a sort of slide show program. I want to get a folder full of images (bmp and jpeg file types) and have this program display it really quickly and then refresh to show another randome image really quickly. Then I want it to look into another folder and grab an image file from there that will be the last image and stays up. What I want to know is how will i go about getting the program to get the random image and then how will I get it to refresh instantly?

View 2 Replies View Related

Create A Jpeg File In C:imagesFolder Based On The Image Stored In The Database?

Nov 19, 2009

I have pictures of each employee stored in SQL database with Image database.

Select pic from empimages where emp_ID=10

give the picture of that employee in binary format.

How do I create a physical jpeg in C:images folder based on the above query in vb.net.

View 2 Replies View Related

Convert An Image To Black And White Before Displaying It In A PictureBox?

Jun 20, 2009

Is there a way to convert an Image to Black and white before displaying it in a PictureBox? Or is there a way to make a PictureBox display color images in black and white?

View 1 Replies View Related

Draw Rectangle On Image Where Color Pixel Is Black?

Mar 17, 2011

I want to draw a rectangle on image where color pixel of image is black

View 1 Replies View Related

Conversion Of A Varchar To A Smalldatetime Results In An Out-of-range Value?

Jul 10, 2009

The code:
strSql = "insert into table2 (transactiondate) values ('" & transactiondate & "')"
seems to be giving me the runtime error:

[code].....

View 3 Replies View Related

Displaying Results From A Temperature Conversion Program?

Oct 13, 2010

I am having trouble displaying my results from a temperature conversion program. I am sure it is something simple that I have overlooked. Here is the code.

[Code]...

View 3 Replies View Related

Winforms - Create Image With Width And Height 64 And Set All Pixels To Black?

Jun 21, 2012

i want to create image with width and height 64 and set all pixels to black

dim b as bitmap
b.width = 64
b.height = 64

[code]....

the code not working

View 1 Replies View Related

How To Save Vector Metafile

May 14, 2010

I have found how to create a metafile using graphics but I can't save it to a vector file. I tried the Metafile.Save("*.emf") function but when I insert the image into PPT, it appear to be a bitmap when I enlarge it.

Here are the code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Using gRef As Graphics = Me.CreateGraphics
Dim hdc = gRef.GetHdc()

[code]....

View 4 Replies View Related

Store Bunch Of Jpeg Files From A Folder In Local File System To A Column In Database With Datatype Image?

Jan 5, 2012

I Need to Store bunch of Jpeg files from local file system to a  column with image datatype in databse.Can any one please provide me some code to do it?

View 6 Replies View Related

Control Webpage (html , Php ) Submit And Get In Background And Display Results?

Jul 21, 2010

need to know how to control web page (html , php ) submit and get in background and display resuts ?like if page has input text that results in data

View 3 Replies View Related

Using An Array To Print Out Test Results Based On Background Color?

May 12, 2011

I've created a program that requires students to answer addition questions.I have the code so that it calculates if the answer is correct, along with outputing the correct answer into a textbox.If the answer is correct the textbox background colour changes to green.If the answer is inocrrect the textbox background colour changes to red.I've done this using an array, and I want to use this array to calculate how many questions the students have answered correctly, and output them onto another page.I'm not sure is something like this would work:I was thinking about giving the textbox that outputs the grade score a value of 10. For every red box that is highlighted, 1 is taken away from the texbox value, outputting the amount of questions the user has answered correctly.Here is my array so far, not including the ability to output how many answers the student has answered correctly.

Public Num1(10), Num2(10) As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

[code].....

View 7 Replies View Related

Transparent Controls Over Form With Background Image Shows Backcolor Not Image?

Sep 18, 2009

I can't remember exactly if this is possible or not but what I am attempting I would think should theoretically be possible.  I know it is possible in WPF but the company I am working for doesn't want to make the transition just yet.  Basically what I want is to use a background image on a form for the background and I have a docked control on the right and left.  I have set the background on both of these docked controls to transparent however it is showing the back color rather than the background image.  I tried, rather than setting the background image property, to override the onpaintbackground and onpaint events and use e.graphics.draw(picture, me.clientrectangle) but it still seems to just pick up the backcolor as the true transparent background so I'm wondering if it's possible to get it to show the background image through the control rather than the backcolor of the form?

View 3 Replies View Related

Saving MetaFile / EMF As Bitmap (TIFF)

Mar 24, 2010

Currently I have a third party control that generates a Metafile. I can save the .wmf file to disk with out issue. The problem is how do I render the Metafile as a Tiff file. Currently I have the following code to get my metafile and save it.

Dim mf As Metafile = page.GetImage(TXTextControl.Page.PageContent.All)
Dim enhMetafileHandle As IntPtr = mf.GetHenhmetafile()
Dim h As IntPtr
Dim bufferSize As UInteger = GetEnhMetaFileBits(enhMetafileHandle, 0, h)
Dim buffer(CInt(bufferSize)) As Byte
[Code] .....

I've tried all sort of Image and Graphic calls and just can't save the meta file as a .tiff. I even tried to create a new bitmap and draw the metafile onto it. I always end up with a GDI exception being thrown.

View 2 Replies View Related

Background Image Will Not Switch Back From The Plain Background Color Of "control"?

Feb 19, 2011

what I am trying to accomplish worked with the code in the last thread I posted a while back. I still am using this code, however, I changed the window size to work better and gave it a nicer background for the title screen of my project. Now what I am working on at the moment is making a settings form that has 2 labels. One for "Default" Layout and one for "Plain" layout. When default is at start, the default label is disabled,and when plain layout is clicked, the button is disabled and default button is enabled.Basically, this is a toggle switch for default or plain where if one is enabled, the option for it is disabled and the other is enabled.My problem is that when I switch from Plain back to default, the background Image will not switch back from the plain background color of "control"Here is my code:

Public Class Settings
Private Sub LinkLabel1_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel1.LinkClicked
MiDNiGHT.BackgroundImage = Nothing[code].......

View 6 Replies View Related

Loading An Image From A Jpeg That Exists In Memory (but Not On Disk) Using Direct Memory Access

Nov 5, 2009

In VB 2005, I am calling a C++ DLL function that returns the address in memory and size in bytes of a jpeg image. How can I load that jpeg image directly from memory into a picture box in my VB form? I cannot afford to save it to disk first.

View 10 Replies View Related

Asp.net - Save Image As Jpeg File Rather Than Aspx File?

Jul 8, 2011

The images on my e-commerce website are watermarked with an aspx script, therefore when you are browsing products, if you want to save the image it saves it as aspx rather than jpg or png. The thing is I need to give urls of jpg for a website that advertises products. There are more than 10,000 products so I can't save all of them manually, so I made a page with jquery that get's the image part of the product display page. What this page returns is this:

<div id="result"><div id="loadpic" style="width: 160px;">
<img border="0" src="http://11.11.11.11/img/picsel.aspx?code=IPHONE-32GB-4">
</div></div>

And the output is only an image. How can I return this image not as an aspx page but as a jpg or png? Since there's a script for watermarking the image and making it aspx, shouldn't there be a reverse function?

View 1 Replies View Related

Conversion Of String Value "14.666666666666666" To Double Results In 14666666666666666.0

Nov 12, 2010

I have a string value that I get from an xml-attribute. The value (string) is 14.666666666666666. I want to convert it to a double value and then get the smallest integral value, which is 14, and then convert the result back to a string value to assign it back to the attribute value.

This is my code:

p.SetAttributeValue("MyAttribute", Math.Ceiling(CDbl(TheAttributeValueAsString.Value)).ToString)

View 8 Replies View Related

Draw Text To Image - Hit Save Again It Writes The Text To The Background Image On PbMenu1?

Sep 4, 2010

I'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.

View 2 Replies View Related

Asp.net - File Copyto Results In Having The Original Image As 0 Kb

May 23, 2012

VB Code:

Dim fi As New FileInfo(PicPath)
Dim di As DirectoryInfo = Directory.CreateDirectory(Path)
Dim FileNameRandThumb As String = POath & ThumbFileName

[Code]....

This Code results in copying the Image correctly but the original image is now 0kb

View 1 Replies View Related

Hot Set Image To Background MDI

Apr 1, 2010

hot set image to Background MDI or change color fromsilver ro another color

View 8 Replies View Related

Add A Background Image In A Textbox?

Nov 14, 2009

How can i add a background in a textbox?

View 1 Replies View Related

Add An Background Image In 2008?

Feb 15, 2011

I'm creating a calculator for a university coursework project and I wanted to know how do you add a background image in the main form in Visual Basic 2008 as I want to have the calculator have a background image similar to one that I programmed when I was studying VB6 years ago (but which I've since forgotten how to program in).

View 3 Replies View Related

ADVERTISEMENT