PictureBox - How To Access Desired Colors From Enumerations

Jun 8, 2011

In my project, it is desirable to access built-in color, dash styles, hatch styles by a numerical index rather than their names. For example, I would like to access the colors in a loop from 0 to 140 and display each of these in side by side rectangles in a picture box. Then later, when I click on the rectangle for a desired color, calculate the index of the color from the position of the rectangle in the picture box and use this index to set another object to the clicked color. I understand the coding for all of this except for how to get the colors from the enumeration in the loop and later, after I get the index from the clicked picture box, how to I access the desired color from the enumeration by using the index obtained from clicking the picture box.


Make A Application That Will Bind User Desired Keys To User Desired Text

Dec 9, 2011

I am trying to make a application that will bind User Desired Keys to User Desired Text. This is what I have done so far, it is not very much but it keeps crashing and visual basic is not telling me anything is wrong with it. I basically just want the user to be able to select a hotkey from a combobox. [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
Private IsFormBeingDragged As Boolean = False


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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


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Filling Background Area Of PictureBox With Grid Colors?

Nov 20, 2011

I want to replicate what I have with a Mac application.  I want to fill the background area of a
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As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
Dim g As Graphics = PictureBox1.CreateGraphics()
Dim i, j As Integer
For j = 0 To Math.Ceiling(PictureBox1.Height / 20)


Onion is a recent refuge from Mac OS X and hates Mac App Store. System: Windows 7 x64

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Apr 11, 2010

I usually always use enummerations as a pass ID of some type with a calculated value using the n^2 notation to calculate the return values. It's easy to derive with squareroots what values are derived from a sum; but most of the time I use the Identifier String to denote a combo box drop down list view. I think this is fairly routine for most developers; since in all my coding or rework I have seen it used commonly by other developers also.

Anyway, I wanted to do some sort of comparisson array of strings to fill the combobox using the *.Items.AddRange() function and it requires an array pass (this typically shrinks the code down considerably) and if you want to mix and match arrays in segments it's easier. So here is the code; for doing so I am assuming that other developers use an "AddToArray" type function like me; if not you have to write the function or just replace the code with the actual adding to array.

''' <summary>
''' Convert an enummeration to an array.
''' </summary>
''' <param name="ConvertTo">Convert to return type.</param>


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Oct 2, 2010

I'm trying to figure out how to add an enumeration to an object with Linq. For example:

Dim thingBlock = <Things>
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Jun 1, 2009

I have a list of rather meaningless codes that I'm processing with a VB.NET Windows application. For the business logic I'm writing to process those codes, I'd like to use meaningful constants (like ServiceNotCovered or MemberNotEligible) instead of the original codes (like "SNCV" and "MNEL").As far as I can tell, Enums can only map to numeric values, not to strings. So the best I've been able to come up with is a static class that exposes the constants as static readonly string fields that are internally set equal to the code values, as follows.

Public Class MyClass
private _reasonCode as String()
Public Property ReasonCode() As String


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Aug 9, 2010

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May 10, 2012

I'm automating a download,and I know the URL to the download page. Well, not exactly. This URL is indeed what I need to use, but the website redirects it to the REAL download page. Unfortunately the redirect only happens if I do an exit sub.  That is to say, if I do a loop sleeping one second per iteration, the loop goes on forever waiting for the redirect. But if I  branch out of the loop by inserting an Exit Sub in break mode, I can see the redirect occur onscreen. (I can watch the current page in the web browser transition to the desired download page). The trouble of course is that I don't WANT to do an Exit Sub at that point, so what's the solution? Do I need to call Browser.Navigate on a background thread?

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Nov 20, 2011

I want to use webbrowser to go to a web site.  This web site has three possible screens that I can get when I try to visit:

(1) A fresh login page, where it does not seem to know me and asks my name and password

(2) The main page of the site, with me logged in from my last visit 

(3) A screen that says something like: "Thanks for visiting and logging out. click here to log back in."

I want to make it so that the webbrowser 1 ALWAYS is able to get to the first kind of page.  When I have webbrowser1 navigate to the specified URL I want it to *not* be redirected to already being logged in from last time and to *not* be redirected to the third kind of page.

I am trying to make a program so that it goes to the site, enters my username and password, and clicks the "login" button.  This is getting messed up because it does not always go to the first kind of page, and, actually, most often redirects to the second or third screens, to my aggravation!

Is there some command I can use with webbrowser and my visual basic 10 program to make it so the webbrowser is NOT redirected without me wanting it to be, so that it always goes into the "fresh" login page?  

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I have a group of buttons all with different labels. I want to have each of these specific buttons open up the same form, but my problem is when I write the code of form1.show it pops open twenty or so different windows. How to I make one button open just one window?

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Feb 10, 2011

TDD is supposed to have 100% code coverage. Does this mean one is supposed to write tests for property getter and setters, and other methods that contain no real logic, such as dealing with external API functionality? Below is one example method (which happens to also be the example in this other SO question which deals with how best to test it, if we are going to test it). This method doesn't do much. It's a facade of theSystem.ServiceProcess.ServiceController functionality of stopping a service. Currently this code was not being written using TDD, but if it was, would it be something that one should test? There is very little logic here.est to test it (IoC & Adapter Pattern vs. Detouring) please see this other SO question.

Public Function StopService(ByVal serviceName As String, ByVal timeoutMilliseconds As Double) As Boolean Implements IWindowsServicesService.StopService


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May 17, 2012

I am using this method to create a csv file using vb.net.

protected void btnExportCSV_Click(object sender, EventArgs e)


This code is creating csv file. But i dont want any extra column in csv.

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May 15, 2012

I am using the following Caml Query to get data from a share point list.

oSb.Append(" <OrderBy>")
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But this query is giving me all columns of list. Is there any way to get only desired column from a share point list using Caml Query?

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May 18, 2012

I created an exe app in vb.net and I want it to run every 3AM so I used the scheduled task feature of Windows 7. The app has an initial form that will countdown from ten before proceed to the main process. My problem is that the form doesn't poped up. But when I look at the task manager, my app is running. I don't know what's wrong with it because when I tested the app to run at times when I am viewing it, the initial form pops up. I already set everything like to Run whether user is logged on or not. So I really don't know what wrong with my app.

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Apr 2, 2010

I have written a vb code for the Monte Hall Problem(in my case I have used the example of 3 cards - one of the card is red and 2 are black, you have to choose red to win) But I am not getting the desired results as expected.

Could someone point out my mistakes or advice me where I have gone wrong in my code.I have attached my vb code with this thread.


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Jan 23, 2012

I have problem in my application to access a picturebox from a thread to make it visible or not. 

When I try to change visibility from the thread, i get the above error, if i disabled crossthreading exception:

Me.CheckForIllegalCrossThreadCalls = False, the program run normally with no error but the image still not visible after i click the button (Start the thread and make picturebox1.visible = true)

change the visibilty of the picturebox from a thread (Backgroundworker).

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May 20, 2010

I am stucked at the situation where I need to disable few columns of a each row ,except newly added row.That is I have 10 columns in grid and I want first three columns that are binded from the rows coming from db as disabled or read-only, rest are editable. if I add new row then all columns of new row must be enabled until and unless it is saved.I dont have any DataKey or Primary key for my existing row or new row. I have to check for some boolean values like IsNewRow. [code] but the problem is that if i click on disabled/readonly rows then newly added rows also gets disabled., which i dont want

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Feb 9, 2009

How to use built-in classes in VB.net for sorting the following number in the desired order?

Number: 5,10,24,9

Desired order: 5, 9, 10, 24

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Dec 2, 2011

I am trying to get a access picture attachment to show in an vb.net picture box. At start up, I add an attachment field to the database, and add pictures to the database in jpg form. I then connect the database to vb project using the general vb settings. The connection is successful, I then add a picture box control to the form along with changing the attachment field to a picture box setting at this point every thing should be good. However, when I go to run the program the picture box remains empty.

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Insert Image From Access Into PictureBox?

Aug 15, 2010

I'm trying to retrieve an image from my access database and insert it into a picturebox using the following code.

PictureBox.Image = rs.Fields().Item(8).Value

but it throws the following error

Quote: Unable to cast object of type 'System.Byte[]' to type 'System.Drawing.Image'

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Loading Image From Access DB To PictureBox

May 2, 2011

I'm new in the vb.net world. The question I have is how to display an image which is in a access data base in a picturebox in visual basic(2010).

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Jan 12, 2012

I designed a advanced music player, everything is ok, I create the setup, install my computer. Here is my problem, there is a mp3 file at my desktop, right click, Open with, Select my program. But, I realise that I didn't write any code for that. Shortly, I want to when double click on mp3 file. And it should be opened with my program..

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Oct 18, 2010

I am trying to convert my DB field OLE Object as Bitmap into a Picture Box. In my DataBase there are 2 fields

1) Text

2) OLE Object (bitmap)

I am having problems trying to get the MS Access Database to equal the picture box. What I have so far is

Private Sub FindChemical()
Dim intDataBaseIndex As Integer
Dim rowIndex As Integer
Dim FieldRow As DataRow


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Jul 29, 2008

I have been working with Visual Basic 6 for over a year and have just recently to move up to .net. I have never had problems viewing picture boxes that were on one form thought another.My old code read something like:frm1.img1=frm3images.treeThis would take the image of the tree from a form that is not viable and place that image in the imagebox.

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May 23, 2010

I wanted to let the users to select their desired wallpapers dynamically in the window main form. Is it possible? Funtional spec:

1. Let the users to select their desired wallpapers from any directory.

2. Save the wallpaper in the database.

3. Load the wallpaper in the main form after login sucessful.

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Feb 26, 2010

i got the following things:

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i want to make a program with this feature:When I type "B A"(note between "B" and "A" has a space)into txtinput, then i click the btnplayvoice, it will look up and check the resources and see if the wav file exists there, if yes, it will play the related(same as inputed) sound files one by one in correct order. That mean in this case I should hear "B.wav -> A.wav" in this order.

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Mar 24, 2010

i am working a "image processing system" project in vb.net using the ms access2007.i have to browse by clicking a button and open a image to display its name to a text box and that image to picturebox.and after that i want to add,del and extract those images to the access database.i want to use datagridview control also.

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Mar 13, 2010

I have following code retrieving image from access database (OLE object)and assigning it to pic ctrl.

Dim bite() As Byte = CType(dg1.SelectedRows(0).DataGridView("subdivisionimage", dg.SelectedRows (0).Index).Value, Byte())


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May 10, 2012

I am programming with Access 2007 VB.net in Visual Studio 2010.I am trying to have my VB program read the database, extract the .bmp image, and assign it to a PictureBox on the fly (I am actually creating a Group on the fly and filling it with data from the database that are selected by my query. One of the fields is "image". All of my other fields are successfully transferring from the DB to the group box.) My problem is converting the OLE Object to a picture/image that I can assign to the PictureBox.I am using TableAdapters and queries set up in an .xsd.I have a database with an OLE Object field.Here is a code snipit of my database set up:

Dim ta AsNew dsWhiteboardTableAdapters.MonstersTableAdapter
Dim monsterList AsNewdsWhiteboard.MonstersDataTable
Dim monster AsdsWhiteboard.MonstersRow


I have tried several ways of getting the image into my picturebox, all lead to errors.

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Oct 20, 2010

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Nov 24, 2011

I am trying to 1) write code in VB2010 that will get a JPG image from a Access Database field and write the image to a PictureBox 2) write code which will write a JPG file to an Access Database field. I have already sucessfully coded this in VB6, without fully understanding what I was doing.

Browsing the various forum's I have come across a few discussions on this subject, but due to my complete amerture status I don't seem to be able to follow the logic.

Below is the VB6 code

Writing JPG file to DataBase:
Dim bytBlob() As Byte
Dim intNum As Integer


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Feb 15, 2011

how to retrieve image from access database?.. I've just finish retrieving data to the datagrid view. I want to retrieve also the image (also stored in the database as path inside the table where the data stored) in the picturebox. When i clicked the specific data in datagrid view, it will show preferred image to picturebox.

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Jan 26, 2009

I have a form in vb.net 2005 with a datagrid and picturebox, when I click an item in the datagrid dgProducts I want to display the Picture which is stored in an access database in binary format inside the picturebox pbProduct. This is the code I have inside the datagrid click:

pbProduct.Image = Nothing
Dim x As Integer = dgProducts.CurrentRowIndex
Dim dt As DataTable
Dim drow As DataRow


I have imported the system.io and system.data.oledb at class level and I hav generated this code from what I can find in forums online, but I get "Parameter is not valid" and no more help than that...

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