Button BackColor Not Working As Expected
Aug 21, 2009
I have a form with a split panel. In the one split are a group of buttons which I want to programmatically change the color of the last pressed button.The following loop seems to run correctly and set the colors correctly but the form doesn't represent that. Once the loop is completed and I recheck the button colors, they revert to previous state.[code]I can get the desired effect by doing the below code but seems less elegant and would obviously require updates as buttons would be added or removed.[code]
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Apr 9, 2009
I have an Excel worksheet with a Source Cell and a Target Cell.Via GDI API functions, I draw a temporary gradient fill over the source cell which happens to be cell "D6"then, I make a transparent copy of the temp gradient fill drawn over the source cell and place the copy (ie the transparent gradient fill) over the target cell which happens to be cell "D9".
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May 27, 2011
I want to fetch data from a database table modify it and update it without being dependent on the database provider and the database structure, because it will be part of a library.My first attempt was as follows:
'factory defined somewhere else as DbProviderFactory
'connection is a working DbConnection
Dim selectcmd As DbCommand = connection.CreateCommand()[code]....
it did not work. After further investigation I figured out that the Commands the CommandBuilder generated were useless, because it inserted ? instead of @param1 for all Parameters. It generated something like INSERT INTO tbl1 (field1, field2, field3) VALUES (?, ?, ?) for the InsertCommand.I would really like to use the CommandBuilder, because it is simple and I don't have something complicated like JOINS.
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Apr 12, 2012
I have a query like so:
Dim clcexists = (From p In dbContext.Signatures _
Where p.StudentID = people_id _
And p.ContractType = "clc" _
Order By p.ID Descending _
Select p)
Later I check whether any rows exist in clcexists using IsNothing like so:
If IsNothing(clcexists) Then ' If no CLC is on file.
clcfirst = Date.Now.Subtract(year)
clcdate = clcfirst
[Code]....
But IsNothing() is not functioning like I expect. There is no row in the results table, but it is still acting as if there is and going to the Else clause.
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May 18, 2010
I am running Windows 7 pro and using Visual Basic 2010 express.I have written a small program to switch on a USB relay which is controled by a serial port.I have debuged the program and it appears to work correctly. I have published the program and if I start it from thr run menu / desktop shortcut / or through explorer it works as expected.
However I have tried to run it by the Task Scheduler and then it fails to run as expected. I have a small section of code that checks to see if the serial port is present if not I have used messagebox.show to ask for the relay to be pluged in. In every case other than when running through the Task Scheduler the messagebox works with the Task schedulerit doesn't show the messagebox and the program hangs I have included the code I have used.
Dim retry As Boolean = False
Dim data() As Byte = {255, 1, 1}
Do Until retry
[code]....
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May 22, 2011
[URL]. I have a Multi-Line textbox with several accounts in it. They are in email@email.comassword format on separate lines. All the code is right, but it goes really weird and loops like 3 times before logging in. Eventually logging into the last account on the Textbox instead of the first. It should just login to the first account...Logout....Login to the second account...Logout and continue the process.
If you want to test it, just put a web browser and a textbox1 multiline box, a button and enter a few working hotmail accounts and you'll see.
Check line 17
Looks like a lot of code, but line 17 is the only bit that needs to be looked at. The rest is just junk/non-relevant to this problem. It separates the accounts perfectly and stuff, but just wont login in the right order.
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Jul 28, 2010
I have declared a String variable(PC) for use within another String variable(currentQuery) to form a SQL statement to pass to my SQLDataAdapter variable.
I'm performing this action to change the string variable(PC) for the different onClick events I have.
It seems i can change this variable (PC) within my onClick event handlers and the 'PC' variable will change when I apply it to a testing Text Box 'testTextBox' but not for the currentQuery variable.
Do i need to perform this action as a function or am i missing something obvious - code below - I don't want to spend time writing a function to return a string value for my SQL statement if i can just tweek something in my code (below).
Partial Public Class IVMain
Inherits System.Web.UI.Page
Dim DBConn As New SqlConnection("Data Source=hnaServer;Initial Catalog=Hnastatus;User ID=Test;Password=test")
[Code]....
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May 22, 2009
I am in thinking about building a small app. Its indended to be a screen grabber with a difference.The window form is see through by setting the Transparancy and BG properties to equivalant values. The TopMost property of the form is set to true.The concept is that the form is placed over the area of the screen that you would like to capture. As the form is see-through you can adjust the form around the area you would like to capture.Once you have done that, its just a matter of click a toolbar button eigther save it to file or copy to the clipbaord and placed in an image array.
Tipicaly it should have some of the functioning of a digital camera which at your lesure allows to view images seperatly in the array and deside wether to keep them or delete them.What would be the best control to use as the capture control? ie. The form itself or an Picturebox that is also seethrough?If the image carn't be crabbed that way, then it should be possible to read the coordinates of the PictureBox (top,left,width and heigh) relative to the underlying image on the underlying app. Than once the coordinates are known it should be possible to copy that rectangle of the screen?
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Apr 10, 2010
Selected Case of a Listbox isn't working as expected
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Jul 14, 2011
I was toying around with some of the linq samples that come with LINQPad. In the "C# 3.0 in a Nutshell" folder, under Chater 9 - Grouping, there is a sample query called "Grouping by Multiple Keys". It contains the following query:
from n in new[] { "Tom", "Dick", "Harry", "Mary", "Jay" }.AsQueryable()
group n by new
{
[Code].....
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May 31, 2010
In Treeview control, I have made particular node backcolor as black to hide text. But it does not work properly. On click of that particular node, it displays text eventhough when I set BackColor as Black. Is there anyway to hide the text in Scenario also. I don't want to actually remove the text from that node as I have done lot of coding by checking node text.
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Aug 8, 2011
I have the following code,
PB.ForEach(Function(x) x.Cost = GetPartCost(x.PartNumber, x.Units, x.Cost, FB))
Return PB.Sum(Function(x) (x.Cost * x.Qty))
However it always returns 0. I've checked and the GetPartCost function executes and returns a non-zero number but the list item cost properties are never updated.The property is just a simple property,
Public Property Cost() As Double
Get
Return _Cost[code]....
If I set a breakpoint in the Set of the property, it never gets hit.
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Sep 23, 2009
I am working a building a form that is generated using Project|Add Windows Form|Form.
In the Load procedure, I placed the following code:
dbObject.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=c:scdbv4datascdbdata.mdb"
rsObject.CursorType = ADODB.CursorTypeEnum.adOpenKeyset
[Code]......
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Jul 29, 2011
Full Program: Option Strict On : Option Explicit On Module Module1
[Code]...
After I ran it, I had a file a.txt in my debug folder but the size is 0 bytes (and when i open it is empty of course) Shouldn't the output had "asd" in it ?
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Mar 10, 2012
I have a problem with changing the color of a button (in vb.net). I have searched the web and plenty of people are willing to tell me HOW TO change the color but my problem is - it doesn't. I say it doesn't, it does when it has finished the rest of the code in the Sub. Can anyone furnish me with an explanation please as to why it doesn't happen when I ask? I'm using Visual Studio 2008
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Aug 27, 2009
Ok Im making a webbrowser and I need transparent buttons and they are kinda transparent its just they still have a backcolor. Is there any way I can disable the button backcolor?
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May 24, 2009
I am trying to create 5 Bitmaps 'on the fly' which I want to use in a ToolStrip DropDown.So far I have found a working way but I wonder if there isn't an easier way to do that?The reason why I have to create this images 'on the fly' is because users can select different colors for the Categories (which I have managed with Button(x).BackColor, so, in order to have the Menu Items shown the exact same colors I try to get a Bitmap based on the Button's back color and add it as MenuItem picture.Here is my code to create the images:
Public Sub MenuCategoryImages()
Dim menuPic1 As Bitmap = New Bitmap(24, 24, PixelFormat.Format1bppIndexed)
Dim pal1 As ColorPalette = menuPic1.Palette
[code].....
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Sep 30, 2009
I created 3 Forms (Form1, Form2 and Form3) and I added a button on every form. This is code for Button1 on Form1:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Form2.BackColor = Color.Red
Form3.BackColor = Color.Red
Me.Hide()
Form2.Show()
End Sub
Code for Button1 on Form2:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.Close()
Form3.Show()
End Sub
Code for Button1 on Form3:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.Close()
Form2.Show()
End Sub
Now, the problem is that when I click on Button1 on Form3 it shows Form2 but the Form2 BackColor is not red, it is default color, A.K.A Control Color. But I specified in Button1 on Form1 that Form2.BackColor is Red. And also if I click on Button1 on Form2 when Form3 shows it, the Form3 BackColor is also default, it is not red.
I know one way to solve it but it is so not-professional. It is that you add on Button1 on Form2 this:
Form3.BackColor = Color.Red
and on Button1 on Form3 this:
Form2.BackColor = Color.Red
It is ok in this situation but what if I have more stuff, for example if I have an option for changing theme so it has to change all labels and buttons ForeColor, what then, is there any other way?
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Oct 26, 2011
I was trying to create a custom button that changes the color of the backcolor & the forecolor upon mouse enter & leave the code in the designer as follows:
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class FocusedButton
Inherits System.Windows.Forms.Button
[code]....
but when i press f5 i get the following error message:
Assembly 'D:my projectsFocusedButtonFocusedButtonobjDebugFocusedButton.dll' doesn't contain any UserControl types.
despite i have saved the project to that particular folder & when i try build it gives build succeeded?
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Nov 24, 2011
I'm not sure why the following code is not working as intended:
CODE:
Where litMessage is the name of the literal control and messageBody is the name of the string variable.
My intention is to output a string onto a web page and to replace the line breaks with a br tag so that it can be displayed on the page correctly. However, nothing is replaced. When viewing the page source, it looks like the line breaks still exist in the string. Similarly, when displaying the string via MsgBox, it displays normally as well. I have also tried wrapping the output with the pre tag and it displays the line breaks properly as well.
The string was originally entered by a user through the use of an asp:Textbox and saved into a MSSQL database. It's retrieved and displayed on another webpage using an asp:Literal control. The only thing that happens to the string before it is submitted is that it is trimmed (i.e. textbox.Text.Trim()).
Perhaps there is something I did not consider?
Edit #1: Due to time constraints, I've decided to just wrap the text with the pre tag. It's an acceptable work around as it preserves the line breaks. Unfortunately, it doesn't explain why the code didn't work in the first place. In the meantime, I'll just leave the question unanswered until I find a proper answer.
Edit #2: Solution found and answered below. UpdatePanel tag added to the question for future reference.
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Oct 20, 2010
User will use a button1.click to open a filedialog to locate the file they needed. after which, the name of the file will appear on a textbox. Button2 is an OK button to write the filename into a txt file. Button2.click will work with the 3 radio buttons - meaning when Radio Button 1 is true and Button2.click is clicked, the filename will be saved asFile1.txt.if Radio Button 2 is true and Button2.click is clicked, the filename will be saved as File2.txt. Likewise to Radio Button 3
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Mar 20, 2010
When I use form properties (Cancel button)it's work but most time this properties will not work properly. How do I this...any another method to close the form on Esc. button...
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Apr 13, 2011
When I click on display button, it should calculate the total of whatever I selected or checked. But it seems to be not working. Also, how do I make it that if I select the radio button mastercard (that has a textbox to enter the numbers), it will disable the other textboxes. Here is my code and user interface in the attachment:
Public Class Form1
Private Sub exitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles exitButton.Click
Me.Close()
[ode].....
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Mar 15, 2012
I added a login form in the end of my vb 2008 gymnassium project. ie i created it last the form coding is right but when i execute the project,the list button(the coach,member,supply lists) doesnt work when i change the startup of the project to login_form it works when the startup in the project properties is Main_form. what to do?is there some arrangement problem?or startup problem ?or something that im not doing?
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Sep 16, 2009
I have few text boxes which has required field validation. In the same page there is a back button and next button. When i click in the back button the validations are working, when i click on the next button validations are not working (means the form is moving to the next page)
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="RequestorForm.aspx.vb"
Inherits="WebApplication1.RequestorForm" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[Code].....
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Mar 15, 2012
I believe I may have already posted a much longer explanation of this , but its driving me spare!!! I have several pieces of code that click buttons thru sendmessage commands, all the code works fine in Windows 7! But I put the app on WindowsXP and only some of the buttons will work,
[Code]...
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Feb 9, 2012
when I input data are not yet available. button does not work but when I enter existing data in the database, the button work for find existing records in the database and msgbox.appear this my coding. (i am using Microsoft Visual Basic 2008 express edition database mysql)
Imports MySql.Data.MySqlClient
Public Class Form2
Public conn As MySqlConnection[code].....
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Sep 21, 2011
Cancel Button Some time not working
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Dec 10, 2010
I have a gridview with an object data source. I have the edit and delete button on each row but cannot get either one of them to work. I do not receive an error, it just doesn't delete. Refreshing does not show deleted either.The method within the dataset is.[code]
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Apr 23, 2011
i followed a few tutorials on here to create a calculator in VB.NET. But i am having trouble getting the percent button working properly.I have tried to come up with some things but nothing i have tried is working.I used this Basic Calculator VB.Net and this one Create a Calculator.I have searched google for an answer but it seems what i have is not working.Im not sure exactly what is needed so i will post all of the code i have. [code] My percent does not work it multiply's by a random number is seems.I am new to VB.NET so im not sure what i am missing.
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