VS 2008 Checking For Registry Values?
Jan 14, 2010
I have tried to solve this myself and I know I am probably doing something really silly here what I have is two different registry values that control what is displayed in the combobox on my form RegistryKey1 has the following values:0,1 or it does not existRegistryKey2 has the following values2,3, or 4 the combobox has the following values 0,1,2,3 However here is the problem if the RegistryKey2 is 2 then it further has to be checked if RegistryKey1 is either 0,1 or does not exist
if it is 1 then the selectedindex = 0
if it is 0 or does not exist then the selectedindex = 1
if RegistryKey2 is 3 then the selectedindex = 2
[code].....
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Jun 15, 2010
I'm trying to determine the framework version that is installed via the registry. When poking around, I found this key: HKLMSOFTWAREMicrosoft.NETFrameworkPolicyv4.0 I've created the following function to determine if the key exists:
[Code]...
I've verified the key exists, but it keeps returning False.
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Jan 6, 2010
I am trying to have my program check for the existence of a registry key so I do not get a null reference exception error. The key may or may not exist depending on the computer. How can I check to see if it exists and then change its value if it does exist or skip over it to the next one if it does not exist? (I already know how to change the value part of it) Im just not sure how to check for the existence of it for example would be trying to set the value of a key that does not exist called test below... this obviously would throw a null exception error so how do I check for the existence of the key before executing these instructions and then if it does not exist it skips this and keeps going to the next code ?
Dim testkey As RegistryKey = Registry.LocalMachine.OpenSubKey("SystemCurrentControlSetTEST", True)
Dim keyval As Int32
' Set to ON
keyval = 1
testkey.SetValue("ON", keyval)
I also check the status of the registry entry on form load
Dim Test As RegistryKey = Registry.LocalMachine.OpenSubKey("SystemCurrentControlSetMYTEST", False)
'Get the reg value.
Dim Testflag As Integer = CInt(Test.GetValue("ON"))
[code]....
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Mar 30, 2010
as title says. and if it has the same values, delete one of them and add (2)
so itll be like: - before the filter:
[Code]....
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Apr 3, 2009
I have a DataGridView1 populated by sql searches. On the rare occasion that nothing is returned, my app cannot make use of data so I'm trying to check for null values. My code below is not correct because IsDBNull is not a member of the of the DataGridView1.
If DataGridView1.SelectedRows(0).IsDBNull Then
MsgBox("Nothing to display")
Exit Sub
End If
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Feb 3, 2011
What im trying to achieve is editing the value of this key; But I've tried everything i can think of.. I've tried just entering the name and type etc. but nothing..I've decalred:
Imports Microsoft.Win32
and the code im attempting to use:
Dim regKey As RegistryKey
[code]....
What i want it to do is create a key from the Drive Selection box i.e. 'H' then create two sub keys called 'DefaultIcon' and 'DefaultLabel' and assign values to their (Default) key but its not working.
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Aug 4, 2011
I wrote an application to manage several installers and I wanted to throw in some registry settings as well. Unfortunately the following code is not writing to the registry, nor is it returning any exceptions.I'm running Visual Basic 2010 Express as administrator using Windows 7 64 bit, I can manually add the values, and I can add them from a .reg file manually but not even by calling the .reg file as a new process (it asks for permission, says it succeeded, but nothing changed).The key already exists, all I need to do is add two values.
My.Computer.Registry.LocalMachine.OpenSubKey("SOFTWAREMicrosoftInternet ExplorerMAINFeatureControlFEATURE_BROWSER_EMULATION", True)
My.Computer.Registry.SetValue("HKEY_LOCAL_MACHINESOFTWAREMicrosoftInternet ExplorerMAINFeatureControlFEATURE_BROWSER_EMULATION", "uwgm_client.exe", 32768, Microsoft.Win32.RegistryValueKind.DWord)[code].....
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Mar 20, 2012
I have an installer for my application that makes changes to the registry for better application performance However, depending on the language of the operating system installed this input need changes For example (which is the case itself) Systems in Portuguese the entry is called (Padrao)Systems in English the entry is called (Default) I know I have I change the property "Condition" of the entry I created but I do not know what I have to write in this "Condition" I write within this property to validate that The system is in English or The system is in Portuguese I plan to put the project set two registry entries, one that will be done on systems with English language and other entry in systems with Portuguese language?
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Jun 4, 2011
Iam trying to Check Values Of 2 textboxex .. n then Print A certain Amount.
[Code]...
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Jun 23, 2010
I'm trying to make a small program that helps cashiers to practice typing barcode on their machine. Barcode consists 12 numbers, and it can start with 0. Below are the code I worked on so far.
[Code]...
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Oct 18, 2011
I have 14 values, that change constantly. I need to know how to check each value against each other to see if they are within 250 of each other. [code] I want these two values in the listbox to blink red in the list box. but i always want each value to check every value in the list box. i dont even know where to start short of programming each possibilty with a if than statement and that would take forever
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Nov 4, 2008
I want to check if two combobox values are equal. The comboboxes are in a datagridview.I found you need to use datagridview_EditingControlShowing to add a handler to the comobo boxes for selectedindexchanged. I can do this with this code.
Code:
Private Sub dgridRegisters_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgridRegisters.EditingControlShowing
Dim combo As ComboBox = CType(e.Control, ComboBox)
[code]....
However, the message box comes up for every combobox in my datagrid when I change the index, not just the cmbPort2. I would like to have something like this...
If cmbPort1.selectedindex == cmbport2.selectedindex then
'do something
endif
..but it doesn't seem possible.
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Jan 14, 2010
Im trying to check to see if a value of a label changes over time. however I can't seem to get it right.
dim val1 as string
dim val2 as string
private sub form1_load()
dim val1 = label1.text
end sub
[Code]...
problem is it will only check it once after ten seconds when the timer is set to 10 seconds i need to to check it every 10 seconds becuase these values display altitude, and if the server freezes the altitudes dont change. I need to make sure they are updated and not frozen.
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Mar 4, 2009
I have a form where when the user clicks the button the values of the form are stored in SQL database. I want to write code in order to check if a specific textbox-value already exist in the database table (in the field "Name"). I 've tried writing something but it doesn't work properly.
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Aug 5, 2009
am new to VB.NET and i was wondering if anyone here knows how to check for duplicate values in strings?
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Jan 22, 2009
How I could go about checking a typed value in a combo to the values in the combo box. I am making a system to select lockerID and Supplier ID I want the user to be able to enter the value in the combo box as well as select the value form the list in the combo box. Here is the code I have been trying.
If cboStockID.Text = "" And cboStockID.Text <> cboStockID.Items.ToString Then
MsgBox("Please enter Stock ID")
Exit Sub
ElseIf cboSupplierID.Text = "" Then
MsgBox("Please Enter Supplier ID")
Exit Sub
End If
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Jun 10, 2010
I'm basically putting some validation logic around an undo button on my form and i'd like to check whether any fields on the form have had their values changed so i can ask the question "abandon changes?". This seems like something pretty standard to me but I can not see how to check whether a value has had its contents changed (without recording a before value and comparing it to the after value which for large forms would be quite horrendous to code).
In the language i used to use we used to walk the object tree (so we dont have to specify each object individually like text box, combo box etc) and check any object that have value-changed = yes to indicate the validation was required.
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Apr 14, 2011
I have a form where two fields on the first page of the form make up the primary key. I want to check for duplicate values before attempting to insert the record, since I don't want the user to go all the way through the form only to find out they can't submit it. So I'm trying to check for duplicate values when the user tries to go to the next page of the form. I wasn't quite sure how to do it, and sure enough I'm getting an error. ("Object reference not set to an instance of an object.") The problem is apparently in my if statement, "If myValue.Length > 0 Then", but I'm not sure what needs to be in place of that.
Protected Sub CustomValidator1_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles CustomValidator1.ServerValidate
'get values
[code].....
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Feb 20, 2009
I have declared a class in VB.NET using VS2K5 with some shared variables and made that class a dllI made use of that dll in another project and tried to make use of those variables. Even though I can able to make use of them, Im unable to view the values of those variables like the values of normal variables when Im debugging. Is there any way that I can watch the values of those shared variables during debugging.
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Dec 26, 2011
Basically I have a form which has 2 drop downs. In the 1st drop down I am selecting City category. When the city is selected I want to update the 2nd drop down values in correspondence to 1st value choosen in 1st drop down. I have done like this,This adds the value in the 1st Drop Down:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim s As String = "connection String"
sqlconn = New SqlConnection(s)
[code]....
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Oct 31, 2011
I've never really used the Check List Box in the past, however, for the recent program I am developing, I am using this control rather than individual check boxes scattered across the form.Anyway, I want to be able to program through code which items get checked in this checked list box. Specifically, I have a variable that contains the text of each check box that I want checked.With a normal check box, I can simply say:
Dim strNames As String
strNames = "John Doe, Mark Johnson, Mike Brown, Cindy Smith"
If strNames.ToString.Contains("Mike Brown") Then[code]....
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Nov 18, 2009
Is there any way I can open a registry file that is not from the local machine? I have the software and system files from another PC and need to create a small code to read and get values from the files. The other PC is down and I just have the registry files so I ruled out the OpenRemoteSubKey method. However, the My.Computer.Registry.GetValue only works on the local machine.
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Jun 4, 2012
i have problem with searching key value in registry I have that
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim itm As ListViewItem
Dim root As RegistryKey
Dim searchkey As String = TextBox1.Text
[code].....
But on line: For Each valueName As String In root.GetValueNames, it says: Object reference not set to an instance of an object.
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Mar 23, 2010
how do i write to the windows registry and read from the registry?i'm using windows 7 - 64 bits, and visual studio 2008.
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Mar 20, 2011
Within my service i have the following function in order to take some values from my registry[code]...
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Jun 24, 2010
I have the following code to read values in the ABCInstall folder inside SOFTWARE sub key of which is under HKEY_LOCAL_MACHINE.
This works fine in Windows XP but not in Windows 7. make it work in both XP and Windows 7?
Dim Key As RegistryKey = Registry.LocalMachine.OpenSubKey _
("SOFTWARE\ABCInstall", False)
Dim SubKeyNames() As String = Key.GetSubKeyNames()
[Code].....
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Sep 1, 2011
i want to make a program that will 'clean' up a computer, so far i can make it delete temp files, clear history, empty the recycle bin, even startup windows disk defrag... basic stuff like that Now i want it to go into windows registry and add some preset values, for example: HKEY_CURRENT_USER // Control Panel // Desktop // MenuShowDelay is by default 400, but i want to set it to 200 or something...i would also need the program to figure out which OS the computer is running (xp/vista/7) and only use the appropriate key and value,
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Jan 5, 2009
My first time and first post here.I am trying to change specific registry key values (to enable fast user shutdown), but I get an error message when I try this. I will hopefully be implementing a number of the TweakUI functions, but in my own representation.
[Code]...
and I get the following error message:
"The specified RegistryKeyPermissionCheck value is invalid. Parameter name: mode"
(I've changed the Security.AccessControl options but none of them are suitable)
I've only been using VB 2008 for about 4 months now, and had no coding expereince prior to this
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Oct 6, 2010
This time i'm tring to work with registry values and so i'm using the following code Private Function RegKeyExists(ByVal hKey As Long, ByVal sKeyPath As String) As Boolean
[Code]...
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Nov 21, 2011
I would like to get applications that run on start up as show them in a list box (Name Value & Data Value). The registry key where the information is stored is HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun. I have wrote code before the gets the subkey values and list them but I'm having trouble remembering how.
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