I'm using VB.Net. I have a WPF User Control called "NavigationPanel" which I created with the Designer. By default, its scope is Public. When I change its scope to Friend in the file NavigationPanel.xaml.vb, I recieve the following error:
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Is there a way to do something like this?
Public Enum CarMakes
Honda
BMW
Mazda
Friend Yugo
End Enum
I need to expose the the Enum to Public except for one of the items I just want to be available from inside the assembly.
When I develop a Windows Forms app in Visual Studio using C#, every control that I add to my form is by default marked as private, which is what I want.
When using VB.NET, every control is by default marked as Friend (the equivalent of internal in C#), which is not what I want.
Can I just change this default? It seems like surely it's a setting somewhere.
I can't make difference between public class and private class and friend and protected friend class.
View 1 RepliesI've been reading about access modifiers in VB.Net lately, and there is something that I can't really understand: How do elements in a Class (or Module) inherit the modifiers of their enclosing block?For example, suppose you have a Friend class Bla in an assembly, with a public method Foo:
Friend Class Bla
Public Sub Foo
(...)
End Class
Does it behave differently than when Foo is set to Friend?
Friend Class Bla
Friend Sub Foo
(...)
End Class
Is it better to use friend or public forms in vb.net? What are the advantages of each?I notice when you import a vb6 project, the forms come in as friend, but when you add a new form in vb.net it is public. I have not seen any difference in the way they work, though, so I must be missing something.
View 3 RepliesI understand how the class modifiers work like public, private, protected, friend and protect friend. They are pretty straight forward. However my question is, if I have a class is marked as friend, what should the properties and methods be marked as? Friend or public? Does it matter? I just want my classes at the lowest exposure level that will let my program work properly and that is friend. If I understand correctly, the public properties of a friend class are available to all members of the assembly. Wouldn't that be the same access level if the properties were all friend properties?The reason that I ask is that using the autocomplete feature to make new properties (type property and hit tab) it creates the new properties with the public attribute.
View 4 RepliesI have a Function for checking the input in a textbox and only allowing Numeric & Backspace; everything works fine so far. My form is for financials and it has about 20 textboxes; they all receive Numeric only data; there is NO alpha data on the entire form required. Note in the snippet below that I don't even need a decimal point as well.
Is there a way to handle ALL textboxes on this form without having to place the Function call in each textbox KeyPress event. took a long (5 year) hiatus from developing VB6
Public Function TrapKey(ByVal KCode As String) As Boolean
If (KCode >= 48 And KCode <= 57) Or KCode = 8 Then
TrapKey = False
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I have a public variable which seems to be going out of scope. I am confused as it has been dimensioned as a public variable: Public xlCell as As Microsoft.Office.Interop.Excel.Range
I originally had all my code in the same module in the same project and it was wrapped within a For/Next Loop (Example 1). I decided to clean up my code and make it more modular (Example 2). All the code is still in the same module in the same project.
Upon doing so, my public variable is not recognized in any of the private subs that I have created. I keep getting the following error: Message="Object reference not set to an instance of an object." When I test the variable using ?IsNothing(xlCell) in the Main Sub I get False in the main sub. this tells me te variable is recognized. However as soon as the Call SelectCaseSub() is triggered, I get a True value for ?IsNothing(xlCell). Why is this? Shouldn't this variable be in scope regardless?
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In my project, I have a local dataset (XSD) that I am using as local-temporary tables. I am getting a System.InvalidCastException when trying to access the field in one the tables. I believe this is because I my code is (incorrectly) not setting a field's value in a row before trying to access it.My problem is that the exception is breaking in the designer file and not in my code. As a result, I'm having difficulting determining which line of my code reading the field value before it has been set. Is there any way to configure Visual Studio to break in my code instead of in the designer created file?
View 1 RepliesI 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
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How do I set a User control (or a class with a few properties) to appear in the tan bar at the bottom of the Designer? I have tried googleing it but, I don't know what that bar is called (Kinda Hard to Google without know what to Google)
View 2 RepliesI have a really simple user control.Using the Designer I put two TextBoxes on it, nothing else.Here's the entire .vb file for this user control:[code]
View 6 RepliesUser control created in vb.net 2003 can it be used in express edition ?
View 15 RepliesI created a user control with a label and 2 combo boxes, and a public property called ControlDataSource that accepts a dataset - which it populates the combo boxes with. I added the reference to the VB project I want to use it on and to the toolbox. I was able to draw it on the form with no problem and use it. However, after changing the backcolor on the control and recompiling it, it is no longer seen by the form. When I bring up the form it's used on, I get a white screen with a bunch of xml. The problem seems to be in the designer, and I get an "object reference not set to an instance of an object" error. Here is the code from the designer:
[code]...
The reference error is pointing to the line: Me.UcDx1.ControlDataSource = Nothing
Here's the wierd part. If I hover the cursor over that property, it correctly identifies it as a dataset. So it does know what it is, but it can't seem to use it.
I am attempting to update an existing winforms application, that was created with a dataset control on all the winforms pages. I have ported it from VS 2008 to VS 2010 and I need to update the database section and connect it to the SQL backend using traditional code method.In the Solution explorer, when I click on the Dataset files, and click "Exclude From project" I am unable to build the project.Is it advisable to comment out the code lines that refer to the dataset in the .designer.vb files?
View 1 RepliesI created a Custom User Control at work using VS Express. It was added to my toolbox and then I added it to my form.When I created another one at my home use VS Pro, I think, it was not added to my toolbox and I'm not sure how to access it.
View 6 RepliesAfter taking a few years off from programming, I decided to start learning vb.net. I have created a user control that contains a picture box. I added some custom properties to the picture box that will hold general string data from a database.
My problem is that the user control is programatically created during run time, and during this time a DoubleClick event handler is added for the picture box that is within the user control.
I need to be able to set the custom properties for the picture box during the creation of the user control, so that when the control (picture box) is double clicked I can read these values but am unsure on how to access them.
The picture box is the entire size of the user control, or I would just add the custom properties right to the user control and add the DoubleClick event handler to that. However, double clicking needs to be done on the picture box since it takes up the entire user control, unless anyone has an idea to trigger the DoubleClick event of the user control when the picture box is double clicked.
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I have created a user control(button) which can flash by changing its backgroung color(I am using a timer).The control works Ok when its flashing property is set to true in form_load event. However it does not work when same is done elseware.
View 7 Replieswhat account for this error message in ls beta 2?'' The last change wasn't successfully persisted.Please shot down the running application.
View 1 RepliesI am trying to get some WMI info on the TPM the code below keeps saying invalid parameter. Anyone know how to get it so scope correctly.
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I have a datatable that was created with the dataset designer. I have it bound to my datagridview. All the columns are set up the way I want, etc. I am performing a SQL operation at runtime, so I can create SQL statements dynamically rather than creating them with the designer. When I try to fill the existing datatable, I get no results. There is no error, but the data i should be seeing in the DGV is not there. However, if I fill a dataset that is created in code at runtime, and then set table(0) of that dataset as the DGV's datasource, the data displays as it should.
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I've tried searching and haven't found much useful information on this, I know it has to be possible, but I'm not sure how. I've got an application that bi-directionally syncs with an SQL express 2008 server. right now, I've got a hardcoded sa user in my conection string, however one feature that was asked for was to audit every change made by end users into the database. To implement this, I've created a user login and password for each user that is going to use my app (8 of them) on my sql server, however I now need to change the connection string to include each users name in the string. This is what I've got setup so far:
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Just moved from VB.NET to C#.In VB to connect and Event Handler to a Sub we use the Handles clause.From what it seems, this do not exist in C#. After creating a simple application with a button I realize that Window Forms Designer automatically created an EventHandler to my button1_Click function (after I double clicked it), in Form1.Designer.cs with this code:
this.button1.Click += new System.EventHandler(this.button1_Click);
But, in VB, the WinForms Designer create the Handles clause in my class, in the function header. So, C# create the default EventHandler in designer file, while VB creates in main class where control resides.
Why does my app not load the saved user scope my.settings when it starts by way of the registry run key? This key starts programs after the user login, per microsoft. So why does it not load the saved user settings? The program does start up, but all the areas on the form where saved user scope settings should be, are the default values (mostly empty strings). (The user scope settings are there if I start my program by the desktop shortcut
I've looked, searched, posted to other forums, but can't seem to find an answer.
I created a button control ,, by double clicking only the process was going on,,when iam single click the button nothing is to be happenend,,so i want to change into single click insted of double click........here my coding is given below.......
<asp:Button ID="getrec" UseSubmitbehavior ="false" runat="server" Style="left: 30px; position: relative; top: 0px; z-index: 101;"
Text="Get Record" />
[CODE]...
Here the coding is all are correct but the problem is when double clicking the button only it was worked ,,,iwant want to change it into single click
For example here i have create a user control. the user control contains labels. when the user hit right arrow button on keyboard, the control will appear on form1. when the user control is there. user can select a label. and when user hit buttons on keyboard, the label.text will change according to the button hit on the keyboard. i have done this code. i just write it roughly here.
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is this code above should i write on usercontrol1 code area or form1 code area? because i got confused here.
I have a User Control with a label on it. I have a Master Page that I have dropped the User Control on. I have other .aspx pages that use the master page that has the user control on it.
What is the best way to change the text of that label on the user control from the .aspx page?
I have created a user control with some properties but when I change them in a form and build the return to the default value, Here is the code I did:
Public Property ButtonFind As Boolean
Get
Return CmdFind.Visible
End Get
Set(ByVal value As Boolean)
CmdFind.Visible = value
End Set
End Property
I have created a user control and need to know how I can let the user change some of the properties of this control at runtime and have the values persist on next startup. There are multiple instances of this control on the form.
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