Alternate Form Won't Load
Jul 15, 2010
one of my forms wont load! it is not underlined in blue or whatever but it keeps giving me a runtime error and i dont know why bc it was working before
Code:
Private Sub AddEmployeeToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AddEmployeeToolStripMenuItem.Click
NewEmployee.Visible = True 'throwing the error
Me.Enabled = False
End Sub
thats how i have been opening my other forms too but just this one gives me this error "An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object."
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Aug 4, 2010
In our application user needs to login to a particular company. We have an option in menu that would let user to select another company while application is open. When user selected other company the application restart itself along with the settings for new company.
Until first load everything was fine and user can select other company from the menu, but when application restarts itself it throw and exception stating Unable to load assembly. Whereas if we again try to run the statement in debug mode everything goes fine. Basically, on alternative loads we are getting this error.[code]...
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Mar 5, 2011
In the program I'm writing I need to have a form load a web page and insert a username and password, then if the resulting site of the login is the error page, it will show the original login form and if it succeeds in the login, it will show another form.[code]...
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Jul 27, 2009
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
Dim con As OleDbConnection
Dim cmd As OleDbCommand
[CODE]...............
The insertion part of the form works great. But my problem is in the form load part......If i leave a field blank(Null),then perform Save operation,close the form after successful insertion and then reopen the form,then it retains the previous values during the form load......This is only in case where i leave a field blank in the previous data entry in the database.......But if i enter values in all fields then form load is working great.
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Dec 14, 2009
How can I load a form and allow it to run it's code in the form load but keep it not visible. I want it to do what it needs to but but not display.
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Aug 24, 2009
I would like to load a default created image at start. But seems to not be working on form load any ideas.[code]
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Apr 7, 2012
I have a couple of tables in a sql server database and i want to load the data from them in form load.
Here is the code i use to load the first table
connection string here
Con.Open()
Dim objCmd As New SqlCommand("SELECT * FROM Customers", Con)
Dim cust As SqlDataReader = objCmd.ExecuteReader()
[Code]...
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Apr 27, 2012
What appears to be a simple logic implementation is embarassing me each time I try to get it done. I have a very simple task: loop over rows in a DataTable and each time the next row is reached, set a variable alternating between 0 and 1.
Dim the alternatingValue as Integer
For Each dr As Data.DataRow In DT
alternatingValue = 0
Next
...so, when this loop finishes with this row, I need to set the alternatingValue = 1 Then when the next loop finishes, I need to set the alternatingValue = 0?
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Feb 15, 2011
we develop a dll in vb.net and we call that dll in our application .eacgh and every time we register the dll using regasm method.is there is any code for register the dll
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May 6, 2009
Basically,I would like to bind the data into datagridview which called PODetailsGrid during page_load. After the data had been bind into the gridview,I would like to make alternate color in each row. For example, the font color for row1 is Black,then second row should be Red,then third row will be Black again..
Code:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
GeneratePODetailsView(GenerateDataSource())
End Sub
[code]....
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Nov 19, 2011
I know how to have alternate row colors with ListView. But how about with ListBox? I've run a search. I read in some web sites where they say you can't. Is that true? Meanwhile, I've done something like:
For i As Integer = 0 To ListBox1.Items.Count - 1 Step 1
If i Mod 2 = 0 Then
ListBox1. BackColor = Color.FromArgb(150, 250, 255)
Else
ListBox1. BackColor = Color.White
End If
Next i
with ListBox's DrawItem event. And it doesn't work.
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Sep 11, 2010
I'm trying to update the UI from a background thread, but the method I'm using at the moment isn't working. From what I've been reading, the method I'm using should work, but it isn't.[code]...
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Sep 21, 2010
I would like to get a 'due' or predicted inspection date based on alternating with another date? How would I go about this? [Code] The due inspection either can be 24 months (second yearly) but it has to alternate with the last safety inspection.
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Oct 7, 2011
I'm fairly new to VB.net and this is my first post on this forum.I'm creating a website in Visual Web Developer 2010 Express in ASP.NET/VB and I'm trying to find out how to alternate a Reponse.Redirect, basically I'm looking to redirect every other visitor to go to a different site.
For example:
Visitor 1 gets: Response.Redirect("http://site-a.com")
Visitor 2 gets: Response.Redirect("http://site-b.com")
Visitor 3 gets: Response.Redirect("http://site-a.com")
Visitor 4 gets: Response.Redirect("http://site-b.com")
and so on
Also, if there is a way to set a cookie for that visitor, so if they visited within let's say the last 90 days, they will go to the same site they visited before, and not be redirected by the Response.Redirect.
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May 19, 2010
Currently I'm working on a program that will run out of my startup folder when I logon to windows so instead of typing in a password my program will run fullscreen blocking any access to Windows until the user presses the buttons on the form in the correct order. In order for this program to actually be purposeful i need to block keystrokes such as "Alt-F4" and "Cntrl-Alt-Delete". I've looked around on google searches and I usually find a similar solution but when
Imports System.Diagnostics
Imports System.Runtime.InteropServices
Public Class Form1
[code].....
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Nov 8, 2010
I want a supervisor override capability for my application.I want to provide a username login prompt (including domain). If the user is in the approved list and the password correct, show advanced controls.What .NET code / functions allow this?
NOTE: VB.net answers preferred. C# also accepted.
EDIT: the logged in user is not the user authorizing the override.
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May 6, 2009
Basically,I would like to bind the data into datagridview which called PODetailsGrid during page_load. After the data had been bind into the gridview,I would like to make alternate color in each row. For example, the font color for row1 is Black,then second row should be Red,then third row will be Black again and so on..
Code: Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
GeneratePODetailsView(GenerateDataSource())
End Sub
[code]....
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Dec 4, 2009
I am writing a program that stores filenames, along with a lot of information about the files in a database. I need to be able to open these files in three different programs from my application. One of these programs, AutoCAD is the default program for the files, but the other two are more difficult. These two need to open the file in a program that is not the default for the file type. Eventually, I'd also like to allow users to point the application to the instance of AutoCAD, MasterWorks, or FeatureCAM that they want to open. I have found articles that explain how to open a file in a default application and articles that tell me how to open any application with a file name, but only 1 suggestion of how to control the program used to open the file. For some reason I cannot get AutoCAD to recognize the file I feed in if I use this method though, so I think it's wrong. This is the method I found that doesn't work:
Start("D:Program Files (x86)AutoCAD 2007acad.exe", file)file is a variable that contains my file name. Since this works fine when I take the program path out, I know the filename is correct, but AutoCAD says it is not.
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Mar 5, 2010
Setup and deployment project template is missing in my installation
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May 7, 2009
I created a VB.NET Winforms app a while ago that printed drawings. The way it did this was to copy files from a network share to the folder for a plotter's que. This plotter would automatically just print anything that was dropped into this folder, which was specified with a path like \Btltmkeng_plt_q. I would do this by using the System.IO.File.Copy method. This worked well, until the company switched to a new printer. When my app copies the file, the printer only prints blank pages.
However, if I open two Windows Explorer apps, and manually drag the file from the network folder to the printer que folder, it works! This proves that the printer can handle these files if they are properly copied. Therefore, I was wondering if there were "alternate" methods for copying files in VB. I tried using the My.Computer.FileSystem.CopyFile method, but that just error out saying it could not find the target folder. Is there another method that more closely resembles what happens when files are copied using Windows Explorer?
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Apr 6, 2012
What I am trying to do is create a form with a button and a list box. When clicked the button will generate a list of 3 or 5 characters that have alternate letters and numbers...eg.
q2h
a6j
z4p
d9k
[Code].....
To complicate things a little, each combination needs to be different, ie. randomised but still according to the 'letter,number, letter' formula. There are plenty of examples of randomising strings such as passwords but I cannot understand how to achieve the above.
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May 18, 2009
I am attempting to make a piece of software that monitors a 3rd party process for injected code. I successfully made a program that uses readprocessmemory from kernel32 to search for strings in a process. My problem is that the process I am attempting to monitor is running as system and provides an access denied message when I attempt to query any information about the process. Including process.handle and process.modules. Are there any ways I can get this process' handle?
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Jul 19, 2010
I have to admit that I was sceptical it would work... but below is the code. I had to make a minor change to the code you suggested. Whenever I tried IPC$ it would return a 53 result code, even though I'm sure the share exists. So at the suggestion of another website I removed the share and just the computer name and this worked.
Imports System.Runtime.InteropServices
Imports System.Net
Imports System.IO
[Code]....
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Mar 20, 2012
Basically I'm aware that using the code shown below you can get the default 'microsoft Sam' voice to work and read a textbox for example.
[Code]...
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May 15, 2012
How do i load the Main form of a WPF so that a seperate thread goes and gets data from the database while the form is in an apartmentstate? (drag-able / movable) I Know this is possible with opening a new window from your main form like this :
Private Sub openOrderWindow()
Dim OrderWindow As Orders = New Orders
OrderWindow.ShowDialog()
End Sub
[code]....
I've tried putting MyBase.ShowDialog() and .Show() and .9000+ other things The only benefit I've got out of using a seperate thread to load from the databse is i can see the screen right away (as oppose to it being a transparent box until it loads) but i cannot move it around or minimize it?is there any way to make it Movable while it loads?
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Sep 16, 2009
i am asking about using the progress bar into the status bar to move when i load any child form inside the MDIParent form.
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Jun 3, 2011
I have two forms. Form A and Form B. Form A has a datagrid that is populated from a SQL Database Table query. When a button is pressed Form B is launched that allows you to add a record to the database table. I need for the datagrid to be refreshed and show the newly added record when I close form B and go back to the parent.
[Code]...
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May 14, 2009
i am having an issue populating two combo boxes on form load. The program will connect to an access database and pull data as instructed. Then as it pulls each record it puts it into the combo box.
This was working.. atleast i think it was. i dont recall it ever not working, however i wasn't looking for it.
My problem is that if when i load the MDI parent form and have it skip the selection form and the login form and load the next form in the sequence, it loads everything perfectly. However if the select form is loaded first, then the login form and then the form i need loaded, it will not populate. The only difference between the two different loads is that the login form calls a function that loads the form as a new project.form
I did this so that I can have multiple forms open at a time. I am assuming my problem is that I need to get the child forms handle then populating controls using that handle? but i think if I had to do that then I would beable to populate the comboboxes on the first form load using the login method of opening the form.
Here's my code.
vb.net
Private Sub frmLine1t5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Text = "Line " & LineNumber & " Test Form"
[Code].....
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Jan 23, 2011
I want to load a child form which is a login form by default when the parent form is loaded.Right now when I click new file on the toolbar of the parent form, then only the login form is loaded but i want it be loaded by default without clicking anything.
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Feb 26, 2012
I am after some code to load another form when the user closes the current form. I have tried this
[Code]...
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