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I'm assuming that since the values change based on what radion button is selected, and that you want to display a different context menu based on what is selected.
I'd suggest creatting 2 different context menu's in design view, then when a radio button is selected, change the listview.contextmenu property to the respective context menu.
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That may work in this instance - but the concept is that I want something that is generic enough that I can re-use anywhere in app. Having to create many context menu's of different forms is not really what I want to occur.
So What I'd like is that I can Call a routine CreateContextMenu(byval MenuType as integer)
which would create a Context Menu for a specific type of Menu (Say Business Code, Order, Invoice etc.)
This adds Standard menu item such as "Open", "New" etc. which at the moment are calling functions called OpenFunctions and NewFunctions. which determine the actual real function to be called such as OpenOrder, OpenBusinessCode etc.
Determining which specific function to be called is handled by looking at a application level property which changes depending upon the listview currently selected.
Ultimately what I'm trying to do is pass a parameter into the OpenFunctions and NewFunctions procedures which are used to determine the specifc type of menu to create.
But that would involve when setting up menuItems making the AddressOf clause pointing to the function accept a paramater
So Ideally I'd like to do something like
Sub OpenFunctions(byval iType as integer)
Dim conMenu As New ContextMenu
Dim menuItem1 As New MenuItem
IF iType <> 0 then
menuItem1.Text = "&test"
conMenu.MenuItems.Add(menuItem1)
AddHandler menuItem1.Click, AddressOf OpenFunctions(iType)
else
throw new exception ("Invalid Type!!!")
end if
End Sub
But cant seem to get the following line .... to work
AddHandler menuItem1.Click, AddressOf OpenFunctions(iType)
I think this is the key - being able to pass the addressof a function with parameters.
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Ok did some testing Here is what I'm going to suggest.
Since you are wanting to reuse the creation of these contextmenu's throughout your program, What I did, is create a class library within your project, create your function to create the contextmenu, and return the context menu. Here is what my class looks like
Imports System.Windows.Forms
Public Class Class1
Public Function createmenu()
Dim conMenu As New ContextMenu
Dim menuItem1 As New MenuItem
menuItem1.Text = "&test"
conMenu.MenuItems.Add(menuItem1)
AddHandler menuItem1.Click, AddressOf opentest
Return conMenu
End Function
Public Sub opentest(ByVal sender As Object, ByVal e As System.EventArgs)
MsgBox("Test for opentest worked")
End Sub
End Class
Make sure, on your Forms, you set reference for this class library,
My Form code looks as follows
Imports testing_contextmenu.Class1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim conmenu2 As New ContextMenu
Dim testing As New testing_contextmenu.Class1
conmenu2 = testing.createmenu()
ListView1.ContextMenu = conmenu2
End Sub
So I believe the easiest solution would be to create the class library, create your functions to create your menu's, and returrn those as I have done, Hope this helps, or gets ya in the direction you want.
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Thanks for the idea - but heres the problem....
Lets say the function OpenTest that your calling, Is as a result of a right click on a listview.
From a listview I need to be able to pass a parameter of which Item I want to open. Which is the listview item ID column. The Sender and e values are that of the menuitem1 and not of those of the listview that was right clicked....
So in this case I need the menu that is not generic enough that I can either pass a reference to a listview or have a parameter passed to tell it what item to Open.
Simply displaying a messagebox when value is clicked is not enough.
So possibly its trying to pass a value into createcontextmenu function and pass this through to the Opentest - but the signature then doesnt match and the line
AddHandler menuItem1.Click, AddressOf opentest
will not work.
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Would anybody have any information on a website which specifically focuses on designing custom GUI's using VB.net. Something that would teach you how to make a GUI which looks more like a real life object instead of a windows form. This would be for a windows desktop application by the way.
Thanks in advance...
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hi
i need help in fix som errors in icon project
if anyone can help please send email to me at
houssam@mail2alpha.com
Thanks
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What is your problem? Noone is going to send you an email asking the very same question...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I am using MSChart in VB.net to show a graph in real time. I'm graphing temperatures taken every second or 1/4 second. The problem i'm having is that i want to graph it for more than 15 minutes. that means thousands of data points. The way i'm doing it now, setting the rowcount to the time i need, takes about 5 mins to load. Is there any other way to load this quicker? here is the code i'm using now that takes so long:
AxMSChart1.RowCount = totalReads
thanks for your help!
megadith
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No, there isn't. MSChart has to revealutate every single point in the data set to get the correct scale of the graph. Like you said, there are thousands of data points, so it's going to take a long time to get through them. The MSChart object was not written to handle real-time graphs. If this is your goal you'll have to look into a 3rd party control written to handle real-time graphing on a large dataset like this.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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shoot! thats what i was afraid of.
Thanks Dave, i appreicate it.
Do you know of any good 3rd party control off hand? thanks!!!
Megadith
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I am just wondering whether VB.NET framework provides any simple string grid where I can display set of rows and columns. I know I can use thirdparty controls and DATAGRID. If anyone know any other thing is available for me to display strings on a simple grid please send reply .
Thanks
Ajay
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Using Datagrid is very easy and essential. I can provide you with some samples how read from SQL and load the info in grid and how to access a specific row in it. That may help.
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I'm trying to save the OLE objects in a MSWord document in separate files. So I want to iterate through each shape , access its OLE object, convert it into an image and save the image to a file. However when I try to access the shape.OLEFormat.object it gives me a run-time error saying "No such interface supported". Here's a snippet of the code:
dim myrange as range
dim oShape as word.shape
dim chart as graph.chart
myrange = doc.paragraphs(1).range
for i = 1 to myrange.shaperange.count
oShape = myrange.shaperange(i)
select case oShape.type
case msoShapeType.msoEmbeddedOLEObject
chart = Ctype(oShape.OLEFormat.object,graph.chart)
case else
...
end select
next
Can anybody tell me where I'm going wrong ??
Smriti
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Yeah, the OLEFormat.object is not convertable to a Graph.Chart object. You must use the methods on the OLEFormat object to manipulate it.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Actually all I had to do was invoke OLEFormat.edit() and then access the object property to cast it into a chart object.
shape.OLEFormat.edit()
Graph.chart chart = shape.OLEFormat.object
And this works.
Thanks anyway.
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I have a digitizer pad and I want to design a simple program that will read the input from it and output the X,Y coordinates into a file for a research experiment. I have some experience with C++, but I have no idea how to communicate with the driver, it can be plugged in to either a USB port or a Serial port. I don't know where to start. Any help would be appreciated even if you could suggest another forum that would be better suited to answer this question.
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SonnyBono wrote:
but I have no idea how to communicate with the driver,
You've already got two strikes against you. You'll need the Software Development Kit, or at least the API documentation for the device before you even think of doing anything like this. If you don't have either one, you'll find it as easy as climbing to the top of Mt. Everest in a Speedo.
Now, the Serial version would be alot easier to do because you can at least talk directly to the tablet without the need for a driver, unlike the USB version. But! You'll still need the API documentation so you can talk intelligently with the device. This means docs on what commands you need to send back and forth and in what formats, what the data is going to look like coming from the device, how to reset it, how to calibrate it, ...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I need some guidance, as I am used to Visual Studio '03 taking care of this for me. I need to connect to a web service, but the web service does not provide a WSDL document to point to...
Is there an easy way to setup and use SOAP without a WSDL document that sets everything up?
TIA!
Wayne
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If you don't have a .WDSL, .XSD, or .DISCO file at your WebService adress, you're going to have a very difficult time calling the functions on that service. Without that document, how are you going to know what parameters to pass, as what types, how to pass them, and the return types?
There is no easy way to do it without that document. No tool is going to set anything up without one of the above files...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I used vbTab in a label in VB.NET and it failed to work. Can anyody help me out with the answer as to why it failed.
Thanks
dotnetdude
dotnetdude
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Simple, any whitespace character is rendered as a space character. Instead of using tab characters to line up columns, just use a seperate label control. You'll find you have much better control over the layout of columns.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have a class defined, along these lines:
class theClass
dim a as Integer
public sub new( ByRef inA )
MyBase.New
a = inA
end sub
public sub doSomething()
a = 5
end sub
end class
Now, I call this as so:
Dim i as Integer
dim b as theClass = new theClass(i)
b.doSomething()
// print i
When I print i, I expected it to be 5, but it shows up as 0. I pass it into the class by reference, so I expected that any change I make to it would show up.
Can someone explain why this is behaving the way it is?
Thanks...
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It's returning 0 because you never assigned any value to 'i' anywhere in your code.
I think your trying to do something like this:
Class theClass
Private a As Integer
Public Sub New( ByVal inA As Integer )
a = inA
End Sub
Public Sub doSomething( ByRef returnValue As Integer )
returnValue = a
End Sub
End Class
Now, to demonstrate ByRef passing:
Dim b As New theClass( 25 ) ' Passed to the contructor ByVal
Dim i As Integer = 0
b.doSomething( i ) ' 'i' passed to doSomething ByRef
Debug.WriteLine( i.ToString() )
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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No, I really would like the parameter passed into the constructor to be passed by reference. I tried to make the example simple, but some background might be required to see why I wish to do it this way. Basically, the class is a dialog box, and I want to construct it, binding some of its values to some variables, then show the dialog, and have the variables that are bound be updated automatically, without the calling class having to pull each one out individually.
At first I thought maybe I needed to assign a value to the original integer, as you suggested, but the following still yields a 1, not a 5, which obviously isnt the desired result. So is there a way to set a member variable within a class to a reference to a variable that has been passed in via the constructor?
<br />
Class theClass <br />
Private a As Integer <br />
Public Sub New( ByRef inA As Integer )<br />
a = inA <br />
End Sub <br />
<br />
Public Sub doSomething()<br />
a = 5 <br />
End Sub<br />
<br />
End Class<br />
<br />
Dim i as Integer = 1<br />
Dim b As New theClass( i ) ' Passed to the contructor as reference<br />
b.ShowDialog() ' User modifies value...should be 5 now...<br />
Debug.WriteLine( i.ToString() ) ' Expect to see 5, instead see 1. <br />
So, I understand using ByRef in a method, but am really looking to bind the class member to a variable reference, if that is possible. From what I'm seeing here, I'm not sure it is...
Thanks for your help...
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Anonymous wrote:
I really would like the parameter passed into the constructor to be passed by reference. I tried to make the example simple, but some background might be required to see why I wish to do it this way. Basically, the class is a dialog box, and I want to construct it, binding some of its values to some variables, then show the dialog,
Can't be done using ByRef in the constructor. When the constructor sub returns the variable references are popped off the stack and lost. The references only exist so long as the function that was called is still executing. The moment the function returns, the references are lost.
What you want to do, or I should say how you want to do it, would require FAR more code than it's worth. Even using databinding, you would have to bind each of your variables to their respective fields on the dialog form.
The best method is to do exactly what you don't want to do ... pull each variable off individually. You'll be doing it no matter what, either way you go...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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