VS 2008 Drawing Chart In Picturebox Then Creating Bmp And Saving

Aug 3, 2009

I'm drawing a chart in a pictruebox with a sub called Techart. After that I'm trying to turn the drawing into a bitmap, so that it will be persistant and also so that I'll be able to save it. This is what I've got from searching the forum:

[Code]...

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VS 2008 - Drawing Graph On PictureBox Using Coordinates

Sep 21, 2009

VB 6 has a ScaleHeight and ScaleWidth property which VB 2008 does not support and this is causing me fits to work around. I'm trying to draw some lines (a graph) on a Picture Box (or a Panel) using my own coordinates (not pixels). This can't be all that hard can it?

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VS 2008 : Drawing With Multiple Colors In A PictureBox?

Apr 13, 2011

I'm basically trying to make a simple, easy-to-use, paint program. I seem to be having problems with using multiple colors in the PictureBox1_Paint option. It draws the graphics but when you change the brush color and click in the picturebox it changes the colors of the previous graphics to the color you are currently trying to use. I need it to allow multiple colors.

Here's the code that I'm currently using..

Imports System.Drawing.Drawing2D
Public Class DynosPaint
Inherits System.Windows.Forms.Form
Private IsFormBeingDragged As Boolean = False

[code]....

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VS 2008 Drawing With Multiple Colors In A PictureBox?

Apr 13, 2011

I'm basically trying to make a simple, easy-to-use, paint program. I seem to be having problems with using multiple colors in the PictureBox1_Paint option. It draws the graphics but when you change the brush color and click in the picturebox it changes the colors of the previous graphics to the color you are currently trying to use. I need it to allow multiple colors.

Here's the code that I'm currently using..

Imports System.Drawing.Drawing2D
Public Class DynosPaint
Inherits System.Windows.Forms.Form

[code]....

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VS 2008 Drawing Dots/polygons On Mousdown Or Click Event In A Picturebox?

May 1, 2010

I have a problem. Im trying to create a form that enables a user to add dots on a mouse click event over an office floor plan. I have searched the web and this site but still am struggerling. My aim is to be able to draw dots (purpose is to highlight problems) and polygons over the plan (purpose to define which service area the floor area relates). I want to save all graphics to an access database with associated
fields.

My thinking is to place a second picture box over the first and make this transparent and use this as the user interface? I dont expect anyone to solve this for me, however, any help with how to draw dots and polygons through mouse down or mouse click would be most helpful.

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VS 2008 Creating A 'Visio' Like Drawing Application - Zoom

May 27, 2009

I have started a little project for myself to become a little more accustomed to drawing in VB.NET. I decided to make an application that looks a little bit like Microsoft Visio.

Until now, I have been able to create an image 'layer' on a blank PictureBox by clicking somewhere in the PictureBox. When I click on such an image layer, it is selected (and a blue rectangle, and its text are drawn). I can also drag the selected image layer.

The code for this is as follows:
The ImageLayer class:

vb.net
Public Class ImageLayer
#Region " Properties "

[Code]....

how to do all this; I'm starting to fear this project is going to be a little much for me...

So, do I really have to do everything manually? So the images locations, their size etc should all depend on the zoom level? Or is there something 'premade' I can use?

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Drawing On Picturebox Vs Drawing On Form?

Feb 18, 2012

I need some code to draw a resizable, draggable rectangular cursor (or selection box) on a picturebox. I found some excellent code (albeit rather old) that does just that, but on a form rather than a picturebox. I have tried converting the code - basically moving things to the picturebox events (Paint, MouseDown, MouseMove etc). It nearly works but leaves a trail behind it when you move or resize the cursor. In other words, the selection rectangle is not being erased before being drawn in the new position.

Is there some fundamental difference between drawing graphics on a form and drawing on a picturebox that would cause this behaviour? Something like, when you invalidate a form and cause a redraw it erases what you did last? If not, then I just need to dig a bit further and work out how the cursor is being erased from the previous position.

Here's the original code that works fine on a form:

Private DragRect As New RectangleF(20, 20, 100, 80)
Private Adornments(7) As RectangleF
Private MouseInRect As Boolean = False

[Code]....

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Drawing Simple Bar Chart?

Mar 15, 2012

i need on how to draw a simple bar chat on my form like the picture below. for A B C D. Each time it draw at random. all % should be equal to 100%.

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VS 2008 Saving Picturebox.image?

Nov 4, 2010

i have a form with a picturebox and a button that when pressed selects the clipboard contents, if a picture, and shows it in the picture box

[Code]...

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VS 2010 Drawing Circles In A Chart Temporarily

Jan 13, 2011

Im drawing a chart based on values from a database as an image in a picturebox. I can then add lines and circles etc in the picturebox, so as to highlight areas in the chart.

The next step I would like to do is to have temporary lines and circles, so when I move the mouse, the circle grows or shrinks and only when I release the mousebutton the circle is assigned to the chart picturebox.

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VS 2008 Saving Picturebox Image Error?

Aug 4, 2009

How come this doesn't work when I try to press a button to save a picturebox to a file?

Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
PictureBox1.Image.Save("C:Test.png", System.Drawing.Imaging.ImageFormat.Png)

[code].....

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Saving Image To Database From Picturebox - 2008 / Framework 3.5?

Aug 20, 2010

I have a form containing a listbox showing a list of image names. It's bound to the database table. When an image name is clicked it shows the image and imagename in a picturebox and textbox respectively. When no image is selected in the listbox, a new record can be inserted by browsing a new image in the picturebox by an openfiledialog, writing the imagename in the textbox and pressing the OK button. When an image is already selected, the record can be updated by pressing the same OK button. The data is saved into MSSQL Server 2005. Corresponding table fields are Keycode int autono, logoname nvarchar(50), logo image.Now the problem, when I insert a new data with an image everything goes fine but whenever I try to update an existing data with an image it throws an exception- 'A generic error occurred in GDI+.' at the following line- 'pic.Image.Save(ms, pic.Image.RawFormat)'. Surprisingly when I update an existing data without any image in the picturebox no exception is generated. I have crossed checked it and seems that the problem is just at one point- 'Updating the image from the picturebox'. My code to insert/update the data by OK button and to populate it by listbox doubleclick follows:

Code:
Private ms As MemoryStream
Private arrImage() As Byte
Private conn As SqlConnection

[code]....

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Saving Image To Database From Picturebox .Net 2008. Fram?

Aug 20, 2010

I have a form containing a listbox showing a list of image names. It's bound to the database table. When an image name is clicked it shows the image and imagename in a picturebox and textbox respectively. When no image is selected in the listbox, a new record can be inserted by browsing a new image in the picturebox by an openfiledialog, writing the imagename in the textbox and pressing the OK button. When an image is already selected, the record can be updated by pressing the same OK button. The data is saved into MSSQL Server 2005. Corresponding table fields are Keycode int autono, logoname nvarchar(50), logo image.Now the problem, when I insert a new data with an image everything goes fine but whenever I try to update an existing data with an image it throws an exception- 'A generic error occurred in GDI+.' at the following line- 'pic.Image.Save(ms, pic.Image.RawFormat)'. Surprisingly when I update an existing data without any image in the picturebox no exception is generated. I have crossed checked it and seems that the problem is just at one point-

[Code]...

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Saving Image To Database From Picturebox. VB 2008. Framework 3.5?

Aug 20, 2010

I have a form containing a listbox showing a list of image names. It's bound to the database table. When an image name is clicked it shows the image and imagename in a picturebox and textbox respectively. When no image is selected in the listbox, a new record can be inserted by browsing a new image in the picturebox by an openfiledialog, writing the imagename in the textbox and pressing the OK button. When an image is already selected, the record can be updated by pressing the same OK button. The data is saved into MSSQL Server 2005. Corresponding table fields are Keycode int autono, logoname nvarchar(50), logo image.Now the problem, when I insert a new data with an image everything goes fine but whenever I try to update an existing data with an image it throws an exception- 'A generic error occurred in GDI+.' at the following line- 'pic.Image.Save(ms, pic.Image.RawFormat)'. Surprisingly when I update an existing data without any image in the picturebox no exception is generated. I have crossed checked it and seems that the problem is just at one point- 'Updating the image from the picturebox'.My code to insert/update the data by OK button and to populate it by listbox doubleclick follows:

[code]...

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Interface And Graphics :: Drawing Line Chart With Dynamic Data

Apr 13, 2009

I would like to build a line chart which can redraw or change during a period of time with dynamic data. So that the x, y axis will change if out of range. The graph may be somehow similar to Matlab. I am using vs2005.

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VS 2008 - Creating / Saving Excel File In BGW

Jun 4, 2011

I am trying to use the BGW to save a DGV to excel file, but don't know how to do it correctly, specifically setting the savefile name this code doesn't work gives me:

'System.Runtime.InteropServices.COMException' occurred
- Make sure the specified folder exists.
- Make sure the folder that contains the file is not read-only.
- Make sure the file name does not contain any of the following characters:

Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process. I also tried doing the Save in the BGW RunWorker Completed event but then there is no file name. It seems I need to pass the file name the user inputs in the SaveFileDialog to the BWG WorkerCompleted event somehow

Private Sub excelexp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles excelexp.Click
ProgressBar2.Visible = True
Saving.Visible = True
Dim saveFileDialog1 As New SaveFileDialog()
[Code] .....

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VS 2008 : Creating New Checkbox In Groupbox + Saving Changes?

Apr 3, 2011

I would like to use code to create a checkbox with default properties and place it at a certain position in a groupbox. For example, i would like to do this by pressing a button and that i can give in the name and tag by use of an imputbox. Also, i have noticed that if something like this is done, these changes aren't permanent and don't apply to the designer nor the code in VB. Is there a way to let the newly created checkboxes appear in the designer? And what about permanently deleting checkboxes by pressing a button. With "Dispose()" it isn't deleted from the designer...

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Drawing To And Saving A Png?

Oct 1, 2010

How could I create a bitmap which is initially completely transparent. I would then like to do some drawing to it, like g.drawImage() and then I would like to save it as a png. How could I do this?

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VS 2008 Making Chart Form Txt File With Ms Chart Tool?

Mar 23, 2009

I'm trying this example but it doesn't seem to work. It gives a IndexOutOfRangeException:I'm using a txt file where the columns are Tab seperated.)

Imports System.Windows.Forms.DataVisualization.Charting
Imports System.Data
Imports System.Data.OleDb

[code].....

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Saving An Image After Drawing?

Jul 13, 2009

I encounter a problem when I try to save a graphic. Drawing and displaying the graphic is no problem, but when I try to save it on file it always results in an empty image.

My code so far is:
Initialization:
Public Class ImageDisplay

[code].....

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VS 2005 : Printing Chart From Picturebox?

Nov 10, 2009

I am creating a bar-chart at runtime using the code below. I would like to print the result of the chart on a A4 paper (Landscape). And add header and footer to it. Do i need to save it as a graphic first?How can i print this?

Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
Dim canvas As Graphics = e.Graphics
Dim heighestamount As Integer

[code]....

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Drawing A Lines In A Picturebox?

Jan 18, 2011

I've looked and tried.. and for some reason just don't seem to be getting right now.

I have a picturebox that is 250x500, I want to draw a vertical line from the top to the bottom.

Using gs = pbMap.CreateGraphics
'Do While x.X < 250
'gs.DrawLine(Pens.Red, x, y)

[Code].....

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Drawing Line On Picturebox?

May 27, 2010

My program is giving the error: "End of statement expected" The red lines are the ones giving errors. I'm trying to draw lines on a picturebox to create a graph

Dim iScale As Single
Const Distance = 1000
pictureBoxGraph.ForeColor = QBColor(0)

[Code]....

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Drawing On A Picturebox Control?

Jul 28, 2009

This form has a picturebox and a button. The program draws a random line onto the picturebox every time the button is pressed. I want to modify the program so that it also draws a line onto the picturebox when the program is first run. I added a draw() to the form_load event but that didn't work. What do I need to do?

Public Class Form1
Dim x1 As Integer
Dim y1 As Integer

[code]....

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How To Save Drawing In Picturebox

Sep 25, 2011

I have here a code to draw on a picturebox and when I am trying to save the drawing, it seems that it cant detect whats inside the picturebox.

Here is my
Public Class Signature
Inherits System.Windows.Forms.Form
Dim mousePath As New System.Drawing.Drawing2D.GraphicsPath()
Dim myAlpha As Integer = 100 ' declare a Alpha variable
Dim myUserColor As New Color()
Friend WithEvents btnSave As System.Windows.Forms.Button
[Code] .....

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Forms :: Picturebox's Graphics - Building A Bar Chart ?

Jan 8, 2011

I'm having troubles while building a bar chart with graphics. What happens is that I create the bar chart correctly and it looks perfect, but when I click outside the picturebox or just change the window, the bar chart disappear completely, leaving the picturebox empty.

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Drawing Shapes Onto A Pic Box And Saving The Modified Image?

Aug 25, 2009

The aim of my program is to load a picture into an pic box, then to be able to place multiple shapes on the picture in the pic box by clicking on the location where i want the shape. The type of shape will depend on the radio button which has been selected. Basically all i want is choice of X or O. (its not tic tac toe either At the end of it all i want to be able to save the image WITH the shapes on it, doesnt matter what format its in (gif, jpg, bmp) as long as it has color and i can see the original image with the shapes included.

I have made several attempts at this, and this is what i have so far. (I am brand new to VB and programming so i need all the help i can get) I have hit a wall with how far previous examples can get me.

[Code]...

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VSTO - Excel Chart, Subtitle For Chart - Access Chart Text Box From Code?

Oct 14, 2011

I have a chart in Excel that I'd like to use a subtitle on. There is no SubTitle Property on the chart object, so I looked in the Excel User interface and found that you can only create a sub-title by using a text box. The text box looks like its associated with the chart, not the worksheet, so how would I access that text box from code?

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Drawing A Resizable Rectangle On Picturebox

May 26, 2010

I have try many different methods but still no avail.how to do this? As i found a good tutorial over

here where it create a resizable rectangle on a form. But what i want is on a picturebox with image.

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Drawing Multiple Images In Picturebox?

Oct 7, 2009

I got down the drawimage part. The problem I am having, is when I draw another image, it replaces the old one. Here is my

vb
Public Class Form1
Dim PicPoint As Point

[Cod].....

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