Given a simple class like this:
Public Class clsOB
Implements System.ComponentModel.INotifyPropertyChanged
Private _Frequency As Double
Private _Value As Double
Public Event PropertyChanged(ByVal sender As Object, ByVal e As
[Code] .....
And then I'd like to do something like this:
Dim
o As
New
clsOB(50, 30)
o = 31
I am creating a customised version of the ListView control and there are several of the properties that a ListView has that I would like to be set to a different value to the ListView default when a user goes to use my user control.
From what I've found there seems to be a number of people suggesting just set them in the constructor, but to the best of my knowledge that would just mean that the user would not be able to change the properties in the PropertyGrid in the VS IDE.I assume this is probably something extremely simple that I have overlooked.
I have a page that is based on a Master Page. The page has AJAX contolled tabs and on one tab I have 2 panels, each with 1 button. Only 1 panel is visible at a time. I am trying to get the button on the visible panel to be the DefaultButton so that when Enter is pressed the click event is fired off. The issue that I am having is that I get this error no matter what I try: The DefaultButton of 'form1' must be the ID of a control of type IButtonControl.I have tried setting the Default Button property of the panel to the buttons client id and to its unique id.
[Code]...
I am new to classes, and I am new to Visual Basic in general, but I am working on a multi class program. The code seems to be correct, but I am trying on instantiate a class oject with the code:
View 3 RepliesI am making a new class that requires a lot of input information. Some of the properties need to be set to a default value, however I do not want to hard code them into the class.
What do you think would be the most efficient way to populate these properties?
I've been thinking of making a new class to hold all the default props and pass them as one object into the new class as a single argument but it seems kind of clunky.
I'm new to classes. In my Who wants to be a Millionaire application, I have a Lifeline class and I create three instances of it - FF, PAF and ATA (50/50, Phone a Friend and Ask the Audience). Something I do with a lifeline is put a cross over its logo, hence the need for a centrepoint property, which marks the centre of the cross on a form.
Public Class Lifeline
Private ptCentrePoint As Point
Public Property CentrePoint() As Point
Get
CentrePoint = ptCentrePoint
[Code] .....
What happens is that at the "Call Form2.DrawCross(Form2.CentrePoint)" line, the tooltip shows that the FF object's centrepoint property isn't set (as I thought it would be by " FF.CentrePoint = tmpPoint").
I am getting a strange error when I try to build my solution. The error occurs when I am calling the oGetHeaderValue function and passing the parameters.
Dim oGetHeaderValue As New clsGetHeaderValue
Dim returnString As String
returnString = oGetHeaderValue(strInvoiceNumber, strOrderNumber)
The error message is: Class 'clsGetHeaderValue' cannot be indexed because it has no default property.
What i am having trouble doing is set the current parameter to the current row at a specific column like e.row[column index]
For Each trow As TableRow In table.Rows
cmd1.CommandText = "dbo.directway"
cmd1.CommandType = CommandType.StoredProcedure
cmd1.Connection = conn
[code]....
Class 'System.Web.UI.WebControls.TableRow' cannot be indexed because it has no default property.
If we say blue is the default colour of the Backcolor property I understand it as if you don't specify a colour for Backcolor blue will be its colour. But I could not make sense of default property of a class in the context of building a custom user control. After calling an instance of a class we have to either call one of its members or assign an other object for it. Therefore why should there be a default property?
View 9 RepliesI believe that the correct way to give a property a default value is to use the Default Attribute on the Property.[code]In the property window, the value that's displayed in a grid's property bag when it's newly dropped onto a form is False, not True. It does recognise that the default value should be True because it shows the value as bolded and then de-bolds it when we manualy set it to true - but it doesn't respect the default as the initial value. Is there any way of getting the property bag to respect the default value?
View 4 RepliesIn on a section of my book about classes and properties. In this example, the author is attempting to show how you can validate a value passed to the property before setting the property. Looks like so far in this book, a couple of things have slipped past the editor, and I think this might be another one...Here's the example:
[Code]...
i want to restore VB setting to 1st-time-use setting. i spend a long long time looking for default button in VB.But i cannot find anything .
View 1 Repliesi have a problem on setting the default value of my date time picker. i have created this application
[code]...
and my problem is i want to set the default value of my DateTimePicker(dtpDate) depending on which date was clicked on the calendar in Main Form. i've been posting this program of mine this past few days now. i just really need to finish this for my upcoming thesis defense.
I am trying to make my program assign "0" to an empty textbox when the user hits START. I'm trying to use a "for each" loop, but with no success so far. I've tried a bunch of different things, but here is the closest i've gotten (all the items added to the collection are textboxes):
Code
Private Sub TESTSTART_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TESTSTARTButton.Click
Dim value_collection As New Collection
[Code]....
when i click the start button, i get a "mismatched type error" ..
E.g. I have a class:
Namespace Common
Public Class AClass
Public Class BClass
[code]....
How can I use BClass without saying AClass.BClass, I've see some existing code using this format, but I can't find the setting.
I programatically / runtime created combobox and bind it to a datasource but can not set its default value. Since I am using the Handler of SelectedValueChanged, this is causing the program to mis-fire. Here is the code I am using.
Public WithEvents T_combo as ComboBox
'dictionary holds data to use in other parts of program
Dim T_Dict As New Dictionary(Of String, String)
[Code].....
how would i go about setting a defualt file path for when i open a document? Basically im opening a file from this filepath Dim SavePath As String = "C:VBWorkBook 6Assignment 6Assignment 6Assignment 6Quotes.xml "But if i were to run this program on another computer, how would i change the directory path so it wouldnt be specific to my pc?
View 1 RepliesAfter adding any control or object to form from datasource or toolbox, vb postfixes object type name to that control e.g. for Name field NameTextBox, for Component like Data Adapter say AddresesDataAdapter, AddresesBindingSource and so on.Here i want to ask you that may i change this default way to identify the object i.e. may i set prefixes desired for diffrent objects.
View 7 Replieshow do i make it say that on form load, the first item in the listbox is selected?
View 3 RepliesI have dropdown list with name : list I want the first index to be the defualt value of dropdown list .
how could do I do this ?
I have a very simple class that holds a few public properties - ID, Text, Colour, etc. and a Boolean called 'SelectedItem'. Just like the Checked property on RadioButtons, only one item can have its SelectedItem property set to True within a particular group. Note: there will be several separate groups (lists), each allowed to have only one item with SelectedItem = True.
My first thought was that I would probably just have to handle everything outside of the class, setting SelectedItem to False for every other item in a particular list when another item was selected. But that seems rather inelegant to me. So I've been trying to think of how this might be done within the class. For example: could I perhaps have a private string property called say "GroupName" - set in the New sub when adding a new instance of the class - and then use a private shared method to set every item's SelectedItem property to False, provided the item has the same GroupName as the newly selected item? I would have a go at doing this but I have no idea how to enumerate every instance of a class from within that class, or whether that's even possible. Is it? Or is there another (better) way to achieve my goal? Here is a cut-down version of what I've got so far:
Public Class ResourceItem
Public ID As Integer
Public Text As String[code]....
As can be seen: instead of instantiating a new ResourceItem and passing that as an argument to the manager's Add procedure, I'm simply passing the details of the new item and the procedure is creating the item from those. I don't know whether this is a good or bad idea - please advise - but I've done it because I couldn't figure out how to make the SelectedItem property only writeable by the manager, so I wanted to avoid having directly accessible objects that could have their SelectedItem property set to True without it deselecting all the other items in the same group. Of course that still leaves the possibility of setting a variable to one of the manager's list items and setting it from there, so I would still like to know how I could prevent that, if possible.
UPDATE: I didn't use the code above in the end, deciding instead to go with Cyborgx37's solution - which seems to work perfectly well for me despite the warnings about best practice. I also realised I would need to use the same class in another scenario where multiple items could be selected, so it was easy to add a Boolean property to the manager to enable that.
Is the default format of ToString dependent on anything server related? Here's the issue: I'm testing and have tested an application on my local machine and ToString(), by default, is returning in a format of "MM/dd/yyyy hh:mm:ss tt", however on our server it appears to be returning as "dd/MM/yyyy hh:mm:ss tt" which the consuming application is not expecting and causing errors.
Dim uvExpireDate = DateTime.Now.AddMinutes(1)
Dim token = String.Format(fmtString, uvExpireDate.ToUniversalTime().ToString(), [various other params])
I am trying to set the "ColumnHeadersDefaultCellStyle" property to the "GoudyHvyface BT" font and it will not change from the default. I am using Visual Basic 2008.
I have set the property properly with no success.
I have tried to set the property in code, using the suggestions in the MSDN and it kept throwing errors.
So I made a little program, and when I run it on my computer the Date format displays as DD/MM/YYYY, but when I run it on some other computers it displays as MM/DD/YYYY. Is there anyway to set the default incoming Date format? Or do I just have to be very careful about how I get/set parts of dates?
View 5 RepliesI want to modify the default Object text size for all objects I place on my form. When I am teaching, it is hard to see the text on the objects. I have changed the code area to 16 pt, but I have not seen how to modify the default font size of the object. They all are 8.8 pt.
View 1 RepliesI have a label printer with the driver loaded with the settings in the driver set I can print the exact label that I want, I have the problem that I need to set the default settings in the driver when the software starts. there are 6 of these printers and the only problem we have found is that different operators like to change the settings.
What I need to do is to set the following commands in the driver so each time the system is started (daily) it loads the settings and works properly.
I need to set
Custom Commands Text, Start, Parsed Text
In the Advanced Setup, turn on use printer settings
Other settings would be usfull but as I cannot set these I do not think I will be able to set others.
I can currently set some of the commands eg,
DefaultPageSettings.PrinterSettings.Copies=2
I have a form that has two text boxs User ID and password. My question user must move cursor to the User ID field. But it should default to that field as that is the only option. How to do it in .net?
View 3 RepliesFor some reason when I place a button on a form and type some text, the text is too big for the button. Descenders are not shown (i.e., the bottoms of g's, p's, q's, etc.). Does anyone know how to modify the default settings of the button, such as the height or font size? Obviously I can change these properties after I place the button on the form, but this gets old. My default font size is 7.8pt San Serif. If possible I would like to increase the default button height and the font size (I like to use bigger text for teaching in class so those in the back of the room can see).
View 8 RepliesCan you set the default button of a panel with a button that is not in that panel but in another content placeholder within a master page? I have tried this but I get the following error:
The DefaultButton of 'pnlTmp' must be the ID of a control of type IButtonControl.
I have also tried setting the panels DefaultButton this way :
pnlTmp.DefaultButton = btnContinue.UniqueID
This gave me the same error.
Whenever I name a new project, a file download window comes up. I tried to reset visual studio to default setting and even uninstalled firefox. I'm trying to get visual studio to behave like it use to. url....
View 5 Replies