I'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.
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I'm using the following code to print an image from a PictureBox. All works great except for scaling images down if they are bigger than the print page. Is there a method I'm missing to do this?
Screenshot, large image outside of the paper bounds:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
AddHandler PrintDocument1.PrintPage, AddressOf OnPrintPage
[Code].....
I am attempting to write a routine that will accurately scale an image to the specified size while keeping the original aspect ratio of the source image.Most [if not all] of the images that the program will be working with will either be 4x3 or 3x4 ratio and normally will be output at 800x600 or 600x800The thing that has me stumped at the moment is what kind of formula I would need to use to resize at image that does not meet the 4x3 ratio. Something like say a 600x255 image or a 255x600 or some other oddball size.
View 3 RepliesI created an image-viewing control for my boss that incorporates panning, zooming via the mouse wheel, and drawing a box to zoom to. The control needs to support very large image files (i.e. several thousand pixels on each side).
It all works, but whenever the code is scaling the image the control UI becomes unresponsive. My boss had me use threading to set the scaling code apart from the UI. The scaling code is now definitely on a separate thread but the UI is still bogged down while scaling code is running!
Imagine I have a rectangle say 400px x 300px. All of this is very easy using Sytem.Drawing. DrawImage. But then I want to leave the left hand side as 300px but change the right hand side to 250 px. I can draw the box using 4 DrawLines but I don't know how to squash the image into the new shape. I want the right hand side of the shape to be 250, the left size 300 and the top and bottom 400px.I can't use DrawImage as it expects the left and right sizes to be the same. Is there a way to manipulate the image into the new shape?I've looked at other questions, but they only apply where the left and right hand side is equal.Any thoughts on how to squash an image into a shape which did not have parallel sides?
View 3 Repliesdeleted the unused image file
View 4 RepliesI Tried To Check If Part Of Image Existing In Another Image
Explanation:
full image:
[Code]...
I deleted the images that I thought I will not need but the program would not run. Error 1 Invalid Resx file. Could not find a part of the path 'E:Code6 04-01-2010 evening Code5 ResourcesIMG_3514.JPG'. Line 123, position 5. E:Code6 04-01-2010 eveningCode5My Project Resources.resx 123 5 Code5.I even deleted the folder to make it worse.The project is code5 but it is running inside the folder of code6.
View 3 RepliesI am trying to perform Zoom and Pan the image in Picture box using the following The Width and Height of the picturebox is (1024,1024).
Private Sub Picturebox1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Picturebox1.Paint
If Mouse_Operation = "ZOOM" then
ZoomWidth = 1024 * Total_Zoom_value
ZoomHeight = 1024 * Total_Zoom_value
[code]....
Total_Zoom_Value and (imgx, imgy) are calculated based on the mouse movements on the picturebox.Now I am able to do the PAN operation after Zoom operation. But If i try to do Zoom operation after PAN operation, I am not able to Zoom the image from the PAN co-ordinates (imgx, imgy). I am not getting how to retain the image drawn using e.graphics.drawimage.how to do the operations on e.graphics.drawimage.
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].....
I want to save a bitmap object to file, but I want to make sure the file path is writeable first. The user should have write permissions to the folder and it should not be a location on a CD drive.Right now, it gives a "A generic error occurred in GDI+", which is not too helpful. I'd rather tell the user that the selected save location is not writeable.
View 6 RepliesHere 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 RepliesI am developing a application in which i need to get images from a search engine. there are many choices to do that google,yahoo, bing etc. I chose bing simply because microsoft provides tight integration with bing and it offers more functionality to developers. So after searching some more i learned how to use this service in my application. Created a key and added web service reference in my solution.[code]But i cant figure out how to do that, after a lot of searching i came up with this link here url...I am unable to use it. If i use it no results are returned.
View 4 RepliesI 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 RepliesI 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 RepliesI'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 Replieshow to Check if clipboard has an image??
View 2 RepliesI 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 if he strored in DB and Dispay In the PictureBox
View 2 RepliesHow to check the picturebox have image or not ?
View 1 RepliesI use the following code to check the background image of two picturebox but it not work.
name of 1st picturebox is :cell1
name of 2nd picturebox is:cell2
code :
If (cell1.BackgroundImage Is cell2.BackgroundImage) Then
'Do somethings
Else[code].....
Check in code, if a background image exists for a button.
View 8 RepliesThe 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?
View 5 RepliesI am trying to check if an image has been changed from a picturebox in a if statement. If I cant check if a image has been changed then can I check if a picturebox been clicked.
View 8 RepliesBasically I want to have a picturebox which shows an embedded resource if not connected to the internet, and an online image if connected to the internet.I assume this can be done on the form load event, I just don't know the code for it. Basically this is the logic though:
-If 'http:/[url].... is available (therefore connected to internet)
-Picturebox1.Image = http:[url].....
-Else[code].....
How can I code that properly? Would putting it in the form load event work?
I'm reading in an image (jpg) using the code below and I need to check that the image is no bigger than 150 pixels by 150 pixels and is less than 25k, how should I do this?
PictureBox2.Image = Image.FromFile(.FileName)
im getting a image from my database to a data set. before i convert it to a proper picture i need to check whether ds.Tables("userDetails").Rows(0).Item("photo") is EMPTY or NOT. How should i write the if condition? <code>If ds.Tables("userDetails").Rows(0).Item("photo")<> ??? Then
Dim pictureData As Byte() = DirectCast(ds.Tables("userDetails").Rows(0).Item("photo"), Byte())
Dim picture As Image = Nothing
Using stream As New IO.MemoryStream(pictureData)
picture = Image.FromStream(stream)
End Using
[Code]...
How can I check if an Image File exists in a Folder?I need something similar to this:If C:***My RecipesNick's Milktart 237.png Exist ThenThe code that goes here is not a problem; I will show it as soon as it works.
View 2 RepliesI am trying to code something that will check if a png image is visible on your screen. So lets say the image is a purple square with yellow circles in it (random example). It will keep checking to see if the same purple square with yellow circles is on your screen. What I'm trying to say is, instead of checking for one pixel color, check to see if the actual image is on there (maybe multiple pixels?)
View 10 RepliesI have an image box full of images , im using a code to select a random image from the imagelist and display it in a picturebox.
My problem now is how can i check what image is in the picturebox and then have it do something else.
[code]...
