In Windows Forms (Vb.net) how can I access the properties without instance (new) ?Form1.Property = "" ? the property deceleration is not static? what is called this way of deceleration?While you can't access Class1.Property!
View 1 Repliescreating single instance form in MDI Application. How to check whether form's instance created or not?
View 6 Repliescan any1 tell me how can i access value of datagridview combo box toassign them to property in form...
View 3 RepliesWhen I got a fieldsinfo-array of a class I know all of it's fields. Now, how can I access all of the fields of an instance of the same class by using the fieldsinfo-array? [code]I'm sure there exists a possiblity to get the value of the instance, but how?
View 5 Repliesstart with I was given a program by a friend that was created in Excel 2003 with the help of Visual Basic Editor. He said he used Visual Basic 2003, which he is not 100% sure about. Anyways he used CurLine in the program and when I try to open it in Excel 2007 and then open the Visual Basic Editor and run the program I get the following error:Run-time error '-2147418113 (8000ffff)':Could not get the CurLine property. Unexpected call to method or property access.
View 2 RepliesUsing the following code I get Identifier expected and Property access must assign property or use its value errors:
ViewState["SomeKeyValue"]
What is wrong with this code?
Suppose I have a class of objects called Porky with a property called IsHuge:
Public Class Porky
Public Property IsHuge As Boolean
End Class
Now I want to make a special kind of Porky -- let's call it UberPorky -- for which I want to change ALL instances to either IsHuge or not IsHuge. What I'd like to do is this:
Public Class UberPorky
Inherits Porky
Public Overrides Shared Property IsHuge As Boolean
[code]....
The trouble is, I can't do that. I'm not allowed to reference MyBase or Me in a Shared property.
This code snippet was converted from the c# snippet on this link A ChildWindow management service for MVVM applications There are two classes in this snippet first is my confirmessage class
[Code]...
Now this works fine in C# , however in vb,net the line where I add the event handler generates the following error on the message.callback property : Property access must assign to the property or use its value I am tearing out my hair on this I have never used the Action of T delegate before so could i be missing something simeple ? I can provide the c# code as well.
got an ErrorProperty access must assign to the property or use its value.Here i attach the code which have an error.In this program i tried to add data into form . I also create button , textbox. i am using visual studio 2005 and sql 2005. i also have attach the imagece
Private Sub btnregister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnregister.Click
admin1.LoginDataSet.staff(Me.NAMETextBox.Text, Me.TELEPHONEMaskedTextBox.Text,
[code].....
I have the following query:
Dim queryStudent = (From p In dbContext.Residents _
Where p.people_code_id = people_id _
Where p.year = year _
[code].....
Well in my vb project it has started giving me a really weird error underlining all my msgbox codes for some reason
this is the error Error 83 Property access must assign to the property or use its value. C:UsersAidanDocumentsVisual Studio 2008ProjectsXeX 360 ModzZ B0XXeX 360 ModzZ B0XForm1.vb 56 17 XeX 360 ModzZ B0X
I have a property in a class as below:
Public MustInherit Class AddOn
Public Delegate Sub UpdateProgress(ByVal fractionComplete As Double)
Private privateProgressUpdate As UpdateProgress
Public Property ProgressUpdate() As UpdateProgress
[code]....
I am getting the error that "Property access must assign to the property or use its value" in the above code.
I thought this would be an easy one but I can't think of a good way to do it.User submits a webform. Based on submitted information I build three classes and assign their properties from received data:
UserInfo userInfo = new UserInfo();
UserAddress userAddress = new UserAddress();
UserEmployer userEmployer = new UserEmployer();
Based on submitted information some classes end up being populated with properties and some do not.
What's the best way to check whether userInfo class, for example, ended up with properties assigned ? I don't want to save a particular object to the database if it doesn't have any real properties assigned and all of them are set to either null or "".
I only want to save the objects that ended up with at least one real property assigned.ps. using NHibernate to save data to db
I find it weird that this error occured when I don't have any properties assigned in the class. Below is my source code.
Public Function GenerateNonContainerReport(ByVal dateFrom As Date, ByVal dateTo As Date, ByVal userID As String) As rptNonContainerized
Try
[code]....
The application is using an xsd file which stores the data tables. Moreover, this stored procedure accepts 3 parameters.
LATEST UPDATE :I got this error "Object reference not set to an instance of an object." I'm now wondering where in the code I did not instantiate.
I get this error, "property access must assign to the property or use its value" I am trying to assign values in a texbox and a combobox to a single vaiable but it gives an error. My line of assignment is feditForm.textbox.Text & "-" & feditForm.comboBox.Text = fnum. fnum is the variable which holds the value got from the datagridview cell. it is defined as Dim fnum As String = Me.regFarmGrd.SelectedRows(0).Cells("NUMBER").Value.
View 1 Repliesmy syntax
[Code]....
the error display is "property access must assign to the property or use its value"
I have got this error and i want to know what property access is, i have deliberately not shown the line of code that it is to do with as i do not want to be given the final answer. I think i understand 'must assign to the property or use its value' does this mean that when setting something the object being set (as i am trying with font stlyle i will use it) font style must be set to bold or italic and then the bold font needs to be put somewhere?
View 4 RepliesI have a program in VB.NET 2005. At some point I have to open an Access2003-Application for getting data in it. I do that by pretending my program is a human user and let it do all the work in Access as a human user would do. Filling Fields, pressing buttons etc. I use the Primary Interop Assemblies for that. So far so good. That code is in use for over half a year now. In the last week I got Office 2007 installed on my machine. Of course I tested the installed version of my program if everthing still works. Every test was succesfull. But if I do the same tests in Visual Studio it always crashes.
All I get is this Errormessage: {"Das COM-Objekt des Typs "Microsoft.Office.Interop.Access.FormClass" kann nicht in den Schnittstellentyp "Microsoft.Office.Interop.Access._Form3" umgewandelt werden. Dieser Vorgang konnte nicht durchgefhrt werden, da der QueryInterface-Aufruf an die COM-Komponente fr die Schnittstelle mit der IID "{66B22FB4-F70E-4F03-A00A-F76E9ADBBF10}" aufgrund des folgenden Fehlers nicht durchgefhrt werden konnte: Schnittstelle nicht untersttzt (Ausnahme von HRESULT: 0x80004002 (E_NOINTERFACE))."}
For all who can't read german:
"Microsoft.Office.Interop.Access.FormClass" can't be converted in to "Microsoft.Office.Interop.Access._Form3" ... Interface is not supported.
Code I use:
Dim access As Microsoft.Office.Interop.Access.Application = Nothing
.
.
.
access = New Microsoft.Office.Interop.Access.Application()
[CODE]...
The Error occurs when I try to access any property of "access.Forms("frmTest")"
I create an Instance of Access to view a report through my app.I would like to check if an Instance of Access has either already been opened by the user, or by the app. If so, use that instance.
Dim oAccess As Access.Application
Public Sub CreateAccessInstance()
Try[code]...
As it stands now, It creates multple MSACCESS.EXE processes which are running until I exit the app.
After I formatted my laptop and reinstalled Visual Studio 2005, I receive a lot of same error as below message.
"Access of shared member through an instance; qualifying expression will not be evaluated"
If I click the error, it direct me to the line and all 102 error suggest me to add "Windows.Forms." before "DialogResult.OK". Should I add something on "Reference"?
I have just completed an upgrade of a VB6 app to VB.net (2008). Everything works as it should except for one (essential) part. I cannot open more than one instance of the built app without getting a file access error. Now don't laugh but my program uses Random Access files to store the data (i know, i know the 1990's called and they want their programmer back). Anyway I've been using this method since the early 90's and it's never let me down. Until now that is. VB6 allowed any number of users to access the files but for some reason VB.net gives the following error: The process cannot access the file "C:lah blah" because it is being used by another process.
View 2 RepliesI have a question regarding namespace names and classes: If I have a class called cVeloConnect in namespace VeloConnect.
[Code]...
I have been making a webbrowser for a while now, everything works well, except i am unable to make the 'open in a new window' button work right. So far i have managed to get a new instance of my form to open with the right url, but i am unable to keep that new form open when the orginal parent form closes.
Code:
Private Sub WebBrowser1_NewWindow(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles WebBrowser1.NewWindow
e.Cancel = True
Dim Href As String
[code]....
I'm trying to figure out the best way to reference a control on a form from within a module. Unfortunately the form is just an instance, so it's not as easy as calling form.control...
Dim ChildForm As New frmSearch
' Make it a child of this MDI form before showing it. '
ChildForm.MdiParent = Me
ChildForm.Show()
That form has an option for printing, which calls another form where certain options are chosen. The print form in turn calls a function in a module, which tries to reference back to the origional form.
childform as new frmSearch -> frmPrintForm -> sub okToPrint (in module Print)
okToPrint tries to reference a listview on frmSearch, but can't find it.
For Each itmX In frmSearch.lstResults.Items
So the solutions I can think of off the top of my head are:
1. Somehow divine which form is the caller of frmPrintForm
2. Pass ChildForm to the frmPrintForm as a variable to be passed on to module Print..
3. Use frmSearch directly instead of using an instance of it.
Number 1 would be my preference, as I don't want to have to pass forms around like that.
In visual foxpro i can access to the code of the events inside of a INSTANCE of a that is in a group box but this is not the case in vb.net how can i do it? Here the images in vfp and vb.net
View 6 RepliesHere's an example of what I'm talking about...
Public Class Sample1
Public Shared Function MyValue() As Integer
Return 0
End Function
Public Sub Code()
[Code]...
Me.MyValue gives a warning in VB.NET and (the equivalent code gives) an error in C#. Is there a particular reason for this? I find it more intuitive/natural to access the shared function using 'Me.MyValue' - but I avoid it to keep my warnings at 0. Did someone else just decide 'Nah, it makes more sense to do it the other way' or is there some technical reason I don't understand?
EDIT: I was thinking of it wrong, more like a 'sub class' in OOP. Even if something is declared in the base class, you access it through the instance you have. But that relationship is not the same with shared or static.
The context of this question is that I am trying to debug performance issues (apart from the obvious ones I already know about and can find).I inherited a code base (VB.NET) for an ASP.NET app. This is an app that was developed way back in .NET 1.1 days, and was the first .NET app for a lot of the developers who worked on it.
In this code base is a class called DatabaseUtility that contains several Shared Public methods as well as non-Shared Public Functions and Subs for CRUD operations to the database (SQL Server).
It is common in my "BL" that a method creates an instance of the DatabaseUtility which essentially figures out what the connection string should be and opens a connection, as well as giving the developer a handle to the other methods contained within it.Dim utility as New DatabaseUtility()
Once I have that, I start to create parameters that I am going to pass to one of the methods in DatabaseUtility (like GetDataSet). There is a Shared method in my DatabaseUtility called CreateParameter which does essentially that. It creates a SqlParameter object so I can add it to a Parameters collection.
Now, the code base is littered with a lot of this:
utility.CreateParameter(...)However, because CreateParameter is a Shared method, I am not sure what is going on behind the scenes. I know because it is a Shared member that an instance of the DatabaseUtility is not created when I call it like this:DatabaseUtility.CreateParameter(...)
However, because I am calling it from an instance (utility), does that change the behavior at all?
I'm checking If a border's child property is not set to nothing or equal to a given element, but whenever I run the program, it says that it's set to nothing and crashes. Here's my code:
If Not Me.Child.Equals(Nothing) Then ...
If Me.Child.Equals(value) Then ...
Both gives an error. What should I do to pass these lines? Also in C# it would look like this:
if(this.Child != null) ...
if (this.Child != value) ...
But this time it doesn't give an error.
For example:
Sub Test()
Dim car as new MyCar
car.chassis.wheel.radius = 15
Console.WriteLine(car.chassis.wheel.radius)
End Sub
So question is. Is it possible to access the property using its string name like
Something("car.chassis.wheel.radius") = 15?
I have so many form in different module in one solution. I already instantiate a new Form as a global variables in my parent form. Then, call the code
frm.show()
in my button1 event