VS 2008 Unable To Change Property?
Mar 17, 2010
I am trying to allow changes to our database through a timecard program. We use and Image database and I am using VS 2008. I am getting the error: (MDMDA) Unable to change property. The trouble shooting tip tell me "check the error code property of the exception to determine the HRESULT returned by the COM object." The error line is in bold.
If Not Trim(frmMantime.txtFunc1.Text) = "" And Not frmMantime.txtRec1.Text = "" Then
'Update Record
lngRecordNumber = frmMantime.txtRec1.Text
[Code].....
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Mar 10, 2010
I inherits textbox Control and I added some new properties to it .one of these properties value i want it to change it's value in desgin time when i change Name property of the new textbox
Public Class NewTextBox
Inherits TextBox
Private _txtSubName As String = String.Empty
That is the property for set or get SubstringName of Textbox
Public Property SubName() As String
Get
Return _txtSubName[code].....
that's the property i want to change it's value when i change Name property of the control.i tried to overrides Name property but it's not overridable also i trieds to overloads it but it doesn't work in desgin time.Here is something i tried but it's wronge.
Private _txtName As String = ""
Public Overloads Property Name() As String
Get[code]......
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Jul 18, 2011
I want to loop through all objects that are loaded in my project ofType x and change a property in each of them... Is there any way to do this?
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Apr 24, 2009
how do i change the property of a created object in the timer event? In other words i have a button that creates a panel for me, in a time event i want to change the created panels to a different backcolor, how would i do this?
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Jan 26, 2010
is there a way so that a button will get it's Text Property from an array on form load?
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Apr 1, 2010
I need some help to understand my options to get this working. I try to update a textbox control by a property-changed event from a class variable. I've digged around for a day and have a vague understanding that this can be solved in three ways:
1. Using some "if InvokeRequired", "Invoke" code in the handler method
2. By programming a special delegate class for this variable
3. By using a databinding directly linking the control (textbox) to the class event
Now.. Are these options correct? And would it be possible to get some help to show these three solutions in actual code (relevant to mine)? I can't seem to manage to sort all the information to a working code. Also, what are the pros and cons of the different solutions?
As my code stands now, it's obviously none of the above, as it gives a cross-thread error, as indicated.
[Code]...
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Dec 2, 2010
I have a Form class with a property defined as[code]...
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Jun 19, 2011
I'm accessing a router using Webbrowser, to get some information from it.After logging into the main page, you click on a link which runs a script to display the info you want. I can do this OK in Firefox or Internet Explorer.In my VB program, having navigated successfully to the router's main page, I try to do this by using InvokeMember ("click") on the appropriate link element in the document and get this error in the script that runs:
"Unable to set the value of the property 'location': value is null or undefined".I don't know how to see the source code of this script, so any ideas on what the error may mean?When I hover over the link in Firefox, the status bar shows it as: javascript:MainFunction('./cgi-bin/v2x00.cgi?fid=168')
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Jan 13, 2010
I'm working on a simple base form in which all the other forms in the project will inherit. This base form only adds 5 properties (at the moment) dealing with painting a gradient background. The problem I'm facing right now is when I change a property on Form1 (the test form) and click run it doesn't show that change. I also checked the .designer.vb file and when I make a change it's not added to the code behind file, I'm at a loss right now to why.
[Code]...
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Apr 27, 2010
I am having trouble to retreive a Image Raw Data into a Property, I included the related function and the Property.
The error I got is:.ImageRawData = CByte(dr.Item("ImageRawData"))
Error Message:Value of type 'Byte' cannot be converted to '1-dimensional array of Byte'
Public Function SelectOneImage() As ImagingData
Dim adapter As New DataAdapter
Dim ds As New DataSet
[code]....
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Dec 3, 2010
I been trying to create a section for my program to change the backgroundimage property of the main form. let me show the code: (some parts may be bad written but I was trying to try to find the problem) this code is a click event from a button
[Code]...
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Oct 16, 2011
I have a Javascript function for my select box, but after I included runat="server" to it, the script debugger highlights on this line below:
' for (i = 0; i < sourceTo.options.length; i++) { ' and says:
SCRIPT5007: Unable to get value of the property 'length': object is null or undefined
I included it because I wanted to loop through it in code behind and perform some other stuffs?
Code:
<select multiple size="8" style="width: 135px" runat="server" id="outletFromBox">
<option value="JP">Jurong Point</option>
<option value="IMM">IMM</option>
[code]...
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Dec 5, 2006
I am faced with the prospect of having to completely rewrite the application.I have suddenly started to get this error message all the time - it seemed to start after I added a table to the schema, but deleting the table makes no difference. I can't see anything wrong with the connection string, but as it seems to be entirely undocumented, that doesn't mean much.
The connection string contains DataSource=.SQLEXPRESS;AttachDbFilename=|DataDirectory| est.mdf;Integrated Security=True;User Instance=Trueand certainly the string works when I use "test connection" from the application setting edit box. I am assuming that for some reason it is not evaluating the Data Directory , but can't see any reason why it shouldn't. Any ideas gratefully received! What might be a clue though is that I can't get rid of the table I added. I have deleted it from the database, deleted it from designer and saved the file, but it just keeps reapearing! Even when it is not showing, there is still a
table adapter in the .xsd file. I am reluctant to start editing this manually because of the danger of screwing something else up - I did try but it caused an error somewhere else (VS helpfully didn't say where)
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Apr 9, 2012
my error code is run-time error 1004 unable to get the correl property of the worksheetfunction class. I read the data from xlsx-files to one dimensional arrays in my vb - program. the essencial code parts are
Option Explicit
Option Base 1
Dim winvyf() As Double, winvx() As Double
[code]....
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Nov 23, 2009
Does anyone know what the problem is with this error message? One or more errors encountered while loading the designer. The errors are listed below. Some errors can be fixed by rebuilding your project, while others may require code changes. Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
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Feb 28, 2010
I don't understand why I can't change forecolor for my textbox. The code seems to me correct, is there any reasons why color won't change in a form this is sub procedure to change color[code]...
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Aug 20, 2005
Anyone here ever tried to convert DockPanel (by Weifen Luo) from C# to VB?In another post I was able to change my base class name, but the child form is not going inside the DockPanel control of my main Midi Form.
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Dec 30, 2010
I am using the MS Chart control (version 3.5.0). I have added it by using the designer (drag and drop). I removed the default "Series1" from the Properties -> Series -> Collection so that the chart contains no data. I am adding the data at runtime based on a canned query to a SQLite DB. Like so:
Dim SQL As String = "SELECT * FROM ageLength ORDER BY month"
Dim cmd As New SQLiteCommand(SQL)
Dim SqLiteConnection1 As SQLiteConnection = New SQLiteConnection()
SqLiteConnection1.ConnectionString = "Data Source=" & My.Application.Info.DirectoryPath & "DataUserData.db3;"
cmd.Connection = SqLiteConnection1
[Code] .....
The data is displayed on the Chart, however, it is a Bar type graph. I set it to use the Spline type for both series.
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Aug 19, 2011
I have 4 Lists:
varList : variable List
tagList: description List
minList: Minimum number with variable
maxList: Maximum number with variable
they are 4 separated lists as of right now. I need to be able to change the order of the VarList, which I have working. However, if the order of the varList changes, I need to be able to change the taglist, minlist, and maxlist in the exact same way.
[Code]...
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Jan 10, 2011
I wish to have two EXE files in my project. Say one EXE has startup form ABC.vb and other is BCA.vb I am not able to change the name in Build so whatever is my startup file, my exe file's name remains the same. How to change it?
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Nov 21, 2010
I have a menustrimp with items on it and with each item i have added an image to it via the image property.But the problem is when ever i try to make an change to the images like i want to remove an image And replace it with another image, at run time, the old image shows the new one doesn't show.This same problem occured to some buttons with icons on them.anytime i change the icon ,it doesn't show the old one shows.It appears the changes doesn't take effect.
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Jun 14, 2011
I'm trying to change the password of an AD account in our domain. The program is supposed to locate the sAMAccountName property in AD through an LDAP connection, and then do two things. 1) unlock the user's account by setting the "LockOutTime" property to zero and 2) change the password to a pre-defined password in the code. I've got the program unlocking accounts, but I can't get it to change passwords.
I've tried the line "DirectoryEntry.Properties("userPassword").Value = "xxxxx". I've also tried the DirectoryEntry.Invoke("SetPassword", New Object() {"xxxxx"}) but neither of them work. The first one throws no exceptions but doesn't change the password, and the second one will give me the message "Exception has been thrown by the target of an invocation".
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Mar 18, 2009
I have a listbox with several list items added. I want that as user click on an item, I should be able to show its property. This should change for different items. For example (hypothetical) : Listbox has numbers 1 - 10. Now when I select 1 I should be able to set property - Name, Lastname, Colour, Age.
When I select 2 I should be able to set - Age, Hair Colour (clr shows), Weight, Date. When I select 3 then - City (combo box drop down), Country, Age only. This way value changes for diff items. One way is to put them in property grid and show them. Though this looks nice but adding/removing items in that is not easy. You need to have a class that refer that to prop grid. Do I have to code for each classes for all values in listbox or is there an easier way to manage items in property grid. If you think prop grid is not the right tool for such an activity then can you suggest something else.
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May 17, 2011
1.Multiple monitors are connection to one computer and they are extended.
2.My window spans to two monitors (Any window like notepad or settings wizard).
3.We change Visual Style From ON to OFF ( i.e. Changed theme from basic and high contrast to Aero or vice versa)
4.The window which was present on two gets shifted to either primary or secondary monitor.
5.This behavior is ok with normal application but I am developing such application which fails if window moves away.
6.I have added handler to check if user changes theme or visual style using :
AddHandler SystemEvents.UserPreferenceChanged, AddressOf UserPreferenceChangedHandler And in UserPreferenceChangedHandler I have checked if UserPreferenceCategory.VisualStyle changed and if it is changed then I have reset the window position back to old values before theme changed , but still it not reverting back to old position.
7.One strange behavior I observed is, it works if I set break point and step through code , but if I remove it then it's not working.
a. Added handler to catch user preferences changed event.
Private Sub RecordingWindow_Load(sender As Object, e As System.EventArgs) Handles Me.Load
AddHandler SystemEvents.UserPreferenceChanged, AddressOf UserPreferenceChangedHandler
End Sub
b. Copied old position
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
If m.Msg = WM_MOVING Then
' Console.WriteLine("Window is moving")
[code]...
d . This is additional code which i tried instead of WndProc
Private Sub RecordingWindow_LocationChanged(sender As System.Object, e As System.EventArgs) Handles MyBase.LocationChanged
_windowLocBeforThemeChanged = Me.Location
End Sub
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Jan 13, 2011
I am unable to chage column widths for some reason. This exact code worked in a 2003 project (when the data grid was DataGrid not DataGridView).
[Code]...
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Jun 8, 2009
I am trying to create a function that will return a pen(System.Drawing.Pen to be exact) that will have a random color and width. I thought that something like this should do the trick:
Public Function random_pen() As Pen
Dim clr As Color = Color.FromArgb(255, random_rgb_color_gen, random_rgb_color_gen, random_rgb_color_gen)
Dim pn As Pen = Pens.PeachPuff 'just a random color else i get a null exception...
pn.Color = clr ' the error is here
[Code].....
However when the code is run i get an Argument Exception with the error message:"System.ArgumentException was unhandled Message="Changes cannot be made to Pen because permissions are not valid.""
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Oct 2, 2011
I want to click on the button, then change the itself position
the visual studio prompt me that is a public property, and the type is double. Why I cannot change the value? And it does not provide any method let me change the top property, so how I can change the property?
<Button Content="Button" Grid.Column="1" Height="23" HorizontalAlignment="Left" Margin="0,0,0,0" Name="Button1" VerticalAlignment="Top" Width="75" Grid.Row="1" />
MsgBox(Button1.Margin.Top)
Button1.Margin.Top = 10
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May 19, 2012
I have a qeustion where i made a function that changes the property value of an object. the objects + alias are stored in an array (Objects()) , if the var (NewValue) has a value then it checks the property type and converts the Newvalue and inputs it.
[Code]...
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Sep 15, 2011
Want to change a property of a user in Active Directory programatically. I know I need to use DirectoryServices but I keep getting referral errors.
1. I want to connect to the directory an get the property first.
2. I will then use a evaluative expression to find out if step 3 is necessary 3. Want to change ths property
However, I want to run this from client machines so they won't have permission to modify the schema so I created a new users, is it possible to authenticate with one user and change another's?
Tutorials don't seem to show specification of the user the are changing the context user.
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Nov 11, 2009
I am storing an array of a custom serializable class in session on my site. When a page on the site changes, suddenly it renders them invalid, and tells me that it can't cast the type to it's own type. I assume the class version numbers are changing or something?!
I'm not trying to redesign this whole process.
Unable to cast object of type 'ShipmentPackages[]' to type 'ShipmentPackages[]'.
Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidCastException: Unable to cast object of type 'ShipmentPackages[]' to type 'ShipmentPackages[]'.
[Code].....
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