Setting Default Property Value In User Control?
Aug 24, 2010
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.
View 8 Replies
ADVERTISEMENT
Feb 20, 2012
I am using a user control using vb.net. It include the program to retrieve the values from database while giving the paramers. When I set the property from my main program i am getting an error "Invalid attempt to call Read when reader is closed." When i gone to the online help i got the message as follows "System.InvalidOperationException (.NET Framework 4)The exception that is thrown when a method call is invalid for the object's current state. InvalidOperationException is used in cases when the failure to invoke a method is caused by reasons other than invalid arguments. For example, InvalidOperationException is thrown by IEnumerator.MoveNext if objects of a collection are modified after the enumerator is created, or ResourceSet.GetString if the resource set is closed before the method call is made. If the method invocation failure is due to invalid arguments, then ArgumentException or one of its derived classes, ArgumentNullException or ArgumentOutOfRangeException, should be thrown instead.[code]
View 1 Replies
Jan 22, 2012
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 Replies
Sep 16, 2009
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
View 11 Replies
Mar 2, 2010
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]...
View 2 Replies
Apr 1, 2010
I have a WebBrowser control in a VB.NET WinForms app. I am able to set the default printer from code and print without prompting the user. However, there is also a print button that shows the PrintDialog. If this action is done first the page will print.Then if I try to programmatically print later (again setting the default printer to some other printer) the it will print to the last printer selected in the PrintDialog box even though I am resetting the default and see the default printer being changed in Windows.It works fine unless ShowPrintDialog has a printer chosen first. Once that occurs it seems to always use that printer no matter what I do.
For Each strPrinter In PrinterSettings.InstalledPrinters
If strPrinter.Contains("My Printer") Then
wScript.SetDefaultPrinter(strPrinter)
[code]....
View 2 Replies
Jan 12, 2012
I am inheriting my own DataGridView (say MyDataGridView) from the standard DataGridView control. What I want is that certain properties of MyDataGridView should have a different default value than what its base have. For example, AllowUserToAddRows, AllowUserToDeleteRows, AllowUserToResizeRows properties should have the default values of False; so that when I drag MyDataGridView into a form in the IDE, the default values shown in the properties grid should be False. Later on, if I want to change them to True from the grid, they will be set accordingly.
View 1 Replies
Nov 8, 2010
I am converting a 1.1 .NET web app to 3.5, and I've run into a bit of a jam.
One web control has a Property that sets the page title label on that web control.
End Property
When a page with the web control was loaded before, it would set the Property to a given string, like in ucHeader.PageTitle = "This is a string." Now, if I don't remove the lblPageTitle.Text = Value, I get a NullReference Exception.
View 2 Replies
Jan 12, 2012
I am inheriting my own datagridview (say MyDataGridView) from the standard datagridview control. What I want is that certain properties of MyDataGridView should have a different default value than what its base have. For example, AllowUserToAddRows,
[Code]...
View 1 Replies
Jun 23, 2010
I have been trying to create a custom control based on the ListBox called FileListBox. I followed Microsoft's walkthrough but am having some trouble.
What I want is to add another property to the ListBox called SafeItems which is an ObjectCollection of strings (like the Items property). I will use the Items property to store a collection of Filenames as strings and I would like to store the corresponding SafeFilenames in the SafeItems collection.
This is what I've tried:
FileListBox.Designer.vb
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class FileListBox
Inherits System.Windows.Forms.ListBox
[Code].....
View 6 Replies
Mar 27, 2011
I created a Custom Class and Implemented a Type Converter for it. I used this Custom Class as a new property of a Custom Control.Everything is fine at design time. I can set the values of this property but at run-time the values i entered resets back to the initial declaration i made.
View 5 Replies
Nov 15, 2010
I am using VB 2008...
On my form I have a "Combobox1" that pulls a list from an access table. I also have a "DataGridView1" that pulls data from another access table.
I am trying to set the "DataSource" property of the "DataGridView1" after clicking a button, which pulls the "Text" property from the "ComboBox1".
ComboBox1.Text will always equal DataGridView1.DataSource as a text string.
I researched the Get/Set command, but it does not make sense to my specific application. I have read countless articles online for weeks, but I have now taken the next step.
View 1 Replies
Jan 24, 2007
I have included a Date and Time Picker Control in oen of my MS Access Forms and want to set its value on the form open event. However, when I try to set the Value property I get the following error message :
[Code]...
View 3 Replies
Dec 30, 2011
If I need access to the value of a user control's property BEFORE PreRender, would I need to base the custom control off of one of the preexisting data controls (repeater, listview,etc.)?One of my user controls features a gridview control that is configured based on the user control's properties on which it resides. Several of the key properties alter the SQL Statement for the underlying recordsource. I'm now in a situation where the property that sets the WHERE statement for the SQL Statement needs to tied to a value in the user control's parent FormView. Think of the formview as displaying a customer detail record. The user control takes the customer's account number and then displays data from a related table such as Customer Contact Names. Since the gridview is created before the control's prerender event, working within the prerender event doesn't seem efficient.
View 1 Replies
Jul 8, 2009
This should be pretty easy, but it throws VS2008 for a serious loop.I'm trying out WPF with MVVM, and am a total newbie at it although I've been developing for about 15 years, and have a comp. sci. degree. At the current client, I am required to use VB.Net. I have renamed my own variables and removed some distractions in the code below, so please forgive me if it's not 100% syntactically perfect! You probably don't really need the code to understand the question, but I'm including it in cas.
I have a very simple MainView.xaml file:
<Window x:Class="MyApp.Views.MainView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
[code].....
View 3 Replies
Jan 30, 2009
I have created a form dynamically. On this from I have added two user controls. The first user control(Mylabel) is inherated from label and the second one(Mybotton) from button. On my Label control I have added a method as follows:
Public ReadOnly Property ctlStatus()
Get
Return (m_Selected)
End Get
[code]....
View 6 Replies
Jul 10, 2010
I created one web user control with property named "ReadonlyField" with boolean datatype. I am able to use in my web pages and now i wanted to add a description to that property so that i dont need to explain each time to my team member what is that property's intention.
I got following snippet in c# but didnt find any equivalent in vb.net and also not sure whether it will work or not.
[Description("My Description")]
public int MyIntProperty
{
get {..}
[Code].....
View 1 Replies
Feb 4, 2011
I built a VB ASP.NET 1.1 Web User Control that contains several properties. I want these properties to display in the VS2003 IDE Properties window, for easy manipulation. However, none of the properties appear! How do I make them show in the IDE?I am a C# guy, and not very familiar with VB, so this is probably a no-brainer. Here's a property, including attributes:
Private _priceHigh As String = "2000"
<Browsable(True), Category("SearchProperties"), Description("Foo"), DefaultValue("2000")> _
Public Property PriceHigh() As String
[code].....
View 1 Replies
Feb 9, 2009
I'd want a text box that at design time the developer can set a datatype property so only a value matching that datatype can be entered at runtime (e.g. If we made the datatype property of a textbox an integer then the user could only enter numbers into that textbox)In additiion I need a further property to replace ".Text". .Text always holds the entered value as a string, I want the new property to contain what has been written into the textbox but as the datatype that has been selected at design time.
View 1 Replies
Nov 15, 2009
Nothing binds to my user control. It will bind to other controls. code for UC property:
#Region "IsOn"
'Public Sub IsOnValue_Changed Handles
Public Sub Me_IsOnChanged() Handles Me.IsOnChanged
[Code].....
View 10 Replies
Dec 18, 2009
I have created a control inherited from a label.I want to add some items to the control at design-time and use a property TypeEditor to set those properties. I have no problems creating my properties for values for the custom control itself, but how do I best get access to the items (in this case more controls) that I want to add to the control?Explained another way; take the ribbon control toolbar in Office 2007. It appears to be a "label" that hosts buttons as members of its controls collection.
View 11 Replies
Feb 25, 2012
I develped custom DateTimepicker in vb.net that users can pick date in persian lanquege with it.in my main contrl class i have bindable property with name "Value". here is the property code :
<Editor(GetType(TypeEditor), GetType(UITypeEditor)), Browsable(True), _
Bindable(True)> _
Public Property Value As String
[code].....
View 5 Replies
Feb 24, 2012
After inserting an user control and double clicking on it, a stub with the default event should appear.
If I don't define what the default event is and I don't assign any attributes to any events or properties, it works, and it generates the stub for the UserControl.Load event (the default default event).
But if I set some attributes for the properties and events and/or I define the default event, the stub generated is corrupted. Here is an example of what I should get:
Private Sub FaceSelector_OnSelect(SelectedObjects As System.Collections.ObjectModel.Collection(Of Object)) Handles FaceSelector.OnSelect
End Sub
And this is what I actually get: Private Sub SketchSelector_OnSelect( SelectedObjects As System.Collections.ObjectModel.Collection`1)
End Sub
Private Sub FaceSelector_OnSelect( SelectedObjects As System.Collections.ObjectModel.Collection`1)
End Sub
In this case I had 5 user controls, I double clicked on one of them, and I got 2 corrupted stubs.
Sometimes the corrupted stubs are generated when I change some properties of other controls in the form, or the form itself. For example I resize the form, the error window doesn't show any errors, hit F5 to compile and run, and get a syntax error.
I tried to track the problem down by removing each event/property attribute/xml description, one by one, many times I thought I found the culprit, but after 10 minutes the problem popped up again.
View 10 Replies
Jul 12, 2010
I created one web user control with property named "ReadonlyField" with boolean datatype. I am able to use in my web pages and now i wanted to add a description to that property so that i dont need to explain each time to my team member what is that property's intention.[code]...
View 3 Replies
Apr 14, 2011
I have a host page with multiple user controls in it. Some of these controls have a user created property named Enabled, and is boolean.In some controls the default value for Enabled is set to False. In the host page, I am able to access the property and set it to True. The control does what it is supposed to.On this host page there is a "Run Report" button which executes a Server.Transfer to a "Results" page.In the codebehind of the results page, control values from the PreviousPage are checked via other user created Properties for the controls and added to a ParamterList.
I am attempting to check the Enabled property of the controls on the PreviousPage, however when this is done, it appears that the Enabled property is set to that of the default (in this case False), and not what I had set it to on the page when it loaded.Does the value of this property need to be put into a hidden text box or something so its value is available after the ServerTransfer? It seems like any control which contains a value is retrievable via the PreviousPage and its user created property, but any variable set inside of the control is reset back to its default value.
View 1 Replies
Mar 27, 2009
I am using VB 2008 Express edition.I have created a user control that has an enumerated property like:Public
[Code]...
There are 3 alternatives for this property: Member0, Member1 and Member2.Is it possible to change the alternative values of this property in runtime dynamically?
View 7 Replies
Oct 12, 2009
I am trying to make a control, like a toggle control like a on/off button and I need to insert/create a property, a checked property.
View 1 Replies
Jul 27, 2009
I have used thirrd party tool from BigSpeed for file transfer. When ever I am trying to assign a value from (txtUserName) to the property like
FileTrans.GetUserName=txtUserName.text.trim
It gives error as Readonly property..... That means I can not assign a value to it.
View 6 Replies
Nov 25, 2011
I want to add a List(Of Book) property to my user control. I defined a Book class and BookCollectionEditor class for CollectionEditor. And also I defined a public property named BookList for my user control. For a custom control it works fine but for user control, the designer does not display my property. On markup I can add a Book item but on designer it gives error: "Type 'System.Web.UI.UserControl' does not have a public property named 'BookList'."Isn't is possible to define a list property for a user control?
<TypeConverter(GetType(ExpandableObjectConverter)), Serializable()> _
Public Class Book
Private _name As String
Private _author As String
[Code]...
View 1 Replies
Nov 4, 2010
Trying to access a property from the parent page on my user control.
Here's the start of my default.asp codebehind:
Partial Class _Default
Inherits System.Web.UI.Page
Private _selectedID As String = "74251BK3232"
[Code].....
I'm getting the error "selectedID is not a member of System.Web.UI.Page"
View 2 Replies
