Using System.Drawing To Make A Selection Tool, And Cropping An Image In .net?
Sep 4, 2009
If i wanted to crop an image in VB.net, how would I go about doing it? I am trying to let the user drag out the box they want (system.drawing.rectangle), and it will automatically remove the edges surrounding the box.
My first problem is primarily the fact that I cannot make the system.drawing.rectangle visible. It is not displaying at all, I am setting its location and height programmatically, but nothing is showing up. I know there is probably something fairly obvious I am missing...but I cannot seem to find it.
My larger issue, however, lies with the cropping itself. I cannot find any crop methods, at all. Is there a hidden one I am missing? Or must I code it myself? How would I go about doing this? It ought to be able to output to a bitmap image object.
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Aug 17, 2009
With this line...
If PictureBox1.Image = My.Resources._2star Then
I get this error: Operator '=' is not defined for types 'System.Drawing.Image' and 'System.Drawing.Bitmap'.Is there another way to say = with images?
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May 23, 2009
Is it possible to convert an object form System.Drawing.Graphics to System.Drawing.Image?
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Jan 21, 2010
Here is my favicon code
Dim oURL As Uri = New Uri(e.Uri.AbsoluteUri)
Dim favicon As Image
If oURL.HostNameType = UriHostNameType.Dns Then
[code]....
The error is Value of type System.Drawing.Image cannot be converted to System.Drawing.Icon Is it even possible to make the favicon be the icon of the form?
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Apr 3, 2009
im using an MDI parent form and MDI Child. how can i print the image that's inside a picture box that's inside the Child from a button that's on the Parent?when i try to use print preview or print dialog, i can't get it to recognize that the document is the picure inside the picture box. i've looked up this error message:Value of type 'System.Drawing.Image' cannot be converted to 'System.Drawing.Printing.PrintDocument'.[code]
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Apr 9, 2012
I am making a web browser using geckofx. I have put the favicon in a picture box but I have changed my mind and now I want it as the form's icon. The code for the favicon is:[code...]
The favicon works fine in the picture box but i think it will look better as an icon. If i change the line Me.PictureBox1.Image = favicon to Form1.icon = favicon I get the error Value of type 'System.Drawing.Image' cannot be converted to 'System.Drawing.Icon'. How can I get this to work?
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Jan 20, 2010
I have a System.Drawing.Graphics g, which draw something in a PictureBox. Now I want to export this pGraphics to a new System.DrawingImage pImage (or Bitmap). But how?
Dim pImage As Bitmap
Dim g As Graphics
g = Graphics.FromImage(b)
[Code].....
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Mar 10, 2010
I have two graphics I'm trying to superimpose into one, then display in a DataGridViewImage cell...The Value property of a DataGridViewImage is an Image type.
Dim Image1 As System.Drawing.Image = imgl_Imagelist1.Images(0)
Dim Image2 As New Bitmap(imgl_ImageList2.Images(0))
Dim DualGraphic As Graphics = Graphics.FromImage(Image1)
[code].....
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May 18, 2012
How can I build a cropping tool such as the one in Office Picture Manager as seen below? Notice that as soon as the Aspect ratio is selected a cropped area shows on the picture that can be dragged to the perfect position creeping the aspect ratio in tact. This is why I wanted somehow to link my app. to Picture Manager. I want the picture to open in Picture Manager, cropping tool already selected, ready to be dragged to the perfect position. Unless you have some code that can do jut this.
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May 16, 2012
Is It possible to make quick selection tool in vb.net like in photoshop?if not can you tell me how to make a free selector or rectangular selector please?
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Aug 11, 2011
I am currently using Visual Studio 2008 (VB.Net) and SQL Server 2008. I have images saved on the database as image. When I fetch it into my code it is a System.Byte[] and I am unable to cast it as a System.Drawing.Image to save to my DevExpress(v10.2).XtraEditors.ImageEdit.
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Oct 5, 2010
Question: I get an exception serializing this class to a nHibernate xml file ({"Could not determine type for: System.Drawing.Image, System.Drawing, for columns:NHibernate.Mapping.Column(Settings)"}).
using System;
using System.Collections.Generic;
using System.Text;
[code].....
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Jun 21, 2010
How do i get System.Drawing.Image in the settings type?
i have a project with different buttons when a user clicks a button the image of PictureBox1 will change.
i want to save this image that the user has chosen after he closes the application, so it will be displayed in PictureBox1 when loaded.
i am using Microsoft Visual Basic 2010 Express
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Nov 26, 2010
When I try and compile code in vb.net 2008 I get an error that says "value of type 'system.drawing.image' cannot be converted to integer. The error happens at piccolor.image
GetDIBits(Form1.PictureBox1.Handle,
picColor.Image , _
0, Form1.PictureBox1.Height, pixels(1, 1, 1), _
bitmap_info, DIB_RGB_COLORS)
Here's the code that explains what piccolor.image is, it's a picturebox on form1 that has an image
readpic(Form1.PictureBox1)
Public Function readpic(ByVal picColor As PictureBox)
GetDIBits(Form1.PictureBox1.Handle,
picColor.Image , _
0, Form1.PictureBox1.Height, pixels(1, 1, 1), _
[Code] .....
And Imports System.Runtime.InteropServices is on the top of the module, if u need more code then let me know. Also I wonder if there is a way to bitblt directly to a pixel array.
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Mar 15, 2010
I am using VB2008 in VS Prof and try to convert at Byte arry stored as a Image format in Sql2000 database.
Code:
Using acnLoc As New SqlConnection(CSLoc)
acnLoc.Open()
Dim G As SqlCommand = New SqlCommand("SELECT [SignatureData] FROM [MyTable] where [OID]=@OID", acnLoc)
G.Parameters.Add("@OID", SqlDbType.Int).Value =Cint(bxShipmentno.Text.Trim())
dim P= G.ExecuteScalar() 'returns a system arry
[Code]...
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Jun 8, 2011
how can i crop an image based on the size of my picturebox?
my picturebox's size mode is normal, i want to have for example, a 100 x 100 image using a 100 x 100 picture box, also i can drag the the image inside the picturebox so that i can have a focal point, a center of the image that i want to crop on.
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Sep 14, 2009
I'm playing with creating thumbnail images for my photo website using VB rather than Photoshop.[code]However, I'd really like to be able to crop images to a square shape - same width and height - from a starting image that might be 1000 pixels wide x 667 high, 500 wide x 750 high or already square and around 750 x 750. In other words, crop a square from the central area of a jpeg image, irrespective of it's exact size.
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Sep 16, 2011
I'm playing with creating thumbnail images for my photo website using VB rather than Photoshop. I've found some great code for resizng jpegs whor this one:
Imports System.Drawing.Drawing2D
Public Class ImageResizer
Public Shared Sub ResizeImage(ByV
[code].....
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Sep 10, 2011
While looking for a way to program a way to print using a console program one of the suggestions that i received was to use the printdocument class.However, when i try to import the system.drawing.printing
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Jul 19, 2010
I have a VB.NET Windows Forms app with a logo image on the form as a System.Drawing.Bitmap inside a PictureBox.I used the Visual Studio Designer to add the logo .bmp image so I don't currently have any VB code doing anything with it.I'd like to make the current logo a clickable object/button so when I click on it a file browser dialog opens and I can select a new image to replace the current image.The current image is a local resource and is set in a PictureBox as a System.Drawing.Bitmap.How would I replace that System.Drawing.Bitmap with a file selected from the file browser dialog?
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Jan 20, 2012
In my code I am taking a screenshot of a CAD screen. The image consists of various colored entities on an all-black background. I would like to find the extents of the non-black pixels in all four directions & crop the image to those extents or maybe a few pixels beyond.
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Dec 23, 2008
Would there be a way to make the system.drawing namespace available to a console application? ( i know this sounds silly, but all my application does is take a bitmap of a window and saves it to file, so whats the point in my application being form based)
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Jan 24, 2011
If i type this in:
CODE:
I get an error: Error 1 Operator '=' is not defined for types 'System.Drawing.Image' and 'System.Drawing.Bitmap'.
I have also used 'is' instead of '=' but that doesn't work either.
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Jan 5, 2010
I want to make a Tool Bar in my task bar such as windows media player tool bar.
I'm using VS2005.net Windows xp Professional Edition.
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May 8, 2010
I am trying to design a digital clock using the drawing tool. i have drawn all the segments using the drawpen function and i have also created a timer that will get the current system time. i want to link the current system to the digital display i have drawn, so that when the time is 1:02 for example only that will highlight on the digital display
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Jan 13, 2009
my name's Sardor, from Uzbekistan. I have some experience in coding in vb.net, but i am having real difficulties with realizing one project. The thing is to code a simple drawing tool and embed it to an existing vb.net application. The drawing tool should be a simple object and have the functionality very similar to mspaint (windows built-in drawing software). It should also have some custom brushes, and it should support loading and saving pictures in common formats such as bmp, jpeg, gif, and png. how to code such a drawing tool? Or can I instead download any such control or tool as an add-in to vb.net and use it?
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Jun 3, 2012
draw individual pixels, without resorting to drawing a line and setting it's length to 1. Is there an actual ability to draw a pixel that is just 1 pixel big?
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Oct 2, 2009
Just need to be able to Draw with the mouse the area that needs to be cut out or modified. Basically like the Photoshop's Lasso tool.
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Sep 19, 2011
I am attempting to make a browser. I have a menu drop-down where the user can choose one of a couple colors. I set up each button, panel, text, etc... as my.settings. I have tried to write the code two different ways, but neither works. How would I fix this?
code:
I keep Getting the Error: Value of type "System.Drawing.Color"cannot be converted to 'String'.
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Feb 28, 2010
i m usingin vb.net hw can i call system calculator thought code
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