I occasionally find myself passing this or Me to a child object. Such as this condensed real-world example...
Public Class Entity
Private mValidator as New EntityValidator()
Readonly Property IsValid()[code]....
I'm concerned about .Validate(Me).I get no warnings or Code Analysis violations, but it just feels wrong. I get nervous about infinite recursion and garbage collection.
Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.
View 2 Repliesi have three forms
when i click button1 on form1=====> form2.showdialog()
then click button 1 on form2 =====> form3.showdialog
then click button 1 on form 3 =====>
[code].....
I have a simple contact book. The application has a main window that's an mdi form. When a contact is added using the "add a contact" form, I want to show a simple feedback message in the parent window status bar saying that the contact was added successfully. Here's the child loading:
[Code]....
I'm trying to setup a WCF web service to be consumed by JavaScript using JSON and jQuery.I've noticed that you can send JSON without a DataContract if the service method parameters match the naming structure of the JSON object:
<ServiceContract(Namespace:="http://foo.com/bar")>
<AspNetCompatibilityRequirements(RequirementsMode:=AspNetCompatibilityRequirementsMode.Allowed)>
[code]....
I am making use of a 3rd party dll and am encountering some strange behavior in VB, which doesn't occur in C# Perhaps someone can explain what is going on. Anyhow, I am making use of a method in this 3rd party library which accepts an array parameter ByRef. The end result is the variable should remain null after the method call, but it is returning initialized for some reason.
[Code]...
I'm having a problem with passing on values from my data grid view to a textbox located in another form.[code]
View 2 RepliesI'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.
In my WPF Form1 I have TextBlock1 that fill from AddressTableAdapter. To edit address user must click EditButton to open Form2 to perform changes. My problem is passing data to Form2 from Form1. In Form2 I have 3 TextBoxes Street, City, Zip, and StateComboBox. I try to code in Loaded procedure of Form2 like this and got error message:
Private Sub Form2Detail_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
Me.AddressTableAdapter.Fill(Me.AbcDataSet.Address)
Me.StreetTextBox = IIf(IsDBNull(AbcDataSet.Address.StreetColumn), "", AbcDataSet.Address.StreetColumn))
Me.StateComboBox = IIf(IsDBNull(AbcDataSet.Address.StateColumn), 0, AbcDataSet.Address.StateColumn))
End Sub
Limited to using v2.0 of .Net framework (we use VB.net) due to environmental constraints on our servers.I've got an ASP.net webpage which pulls data from a webservice that performs checks on user accounts in active directory. Operators can check multiple accounts at one time using the web interface. The webservice returns a list(of AccountCheck) objects which themselves contain single properties like username, email address, and List(of AccountError) objects which contain multiple properties.[code]What I want to do is using some kind of repeater, create multiple panels or divs which contain labels showing the username, email etc, and a gridview which has the accounterror list bound to it to show all the errors. The users could be checking 2, 5, 7 accounts at once, and is dynamic.
View 2 RepliesIn a VB 2010 program we have two classes Aclass and Bclass.In Bclass we need all values of an Aobject.How could we pass the Aobject to Bobject?[code]Is there any VB entity that could be defined as including all the properties of a given class?
View 3 RepliesI am creating a procedure and would like to know if I can pass the name of a property. I.e ComboBox1 so I can change the properties of that object. What I have done is create a procedure to populate a Combobox from my MySQL database. What I want to do now is populate the relevant Comboboxes without having to create a new procedure specifically for each combobox. I can create a procedure for each Combobox but the whole reason for procedures and functions are to minimize repetitive code and to make code easier to manage.
At the moment my procedure is ProcedureName(ComboBox1, "DatabaseName", "DatabaseField").
What I want to be able to do is do
ProcedureName(ComboBox1, "DatabaseName", "DatabaseField1").
ProcedureName(ComboBox2, "DatabaseName", "DatabaseField2").
ProcedureName(ComboBox3, "DatabaseName", "DatabaseField3").
I need to write a procedure which will allow me to set readonly attributes for certain objects, for example:My form contains two text boxes box1, box2.My sub procecdure will contain code which sets box1.readonly() = true, but i dont want to name the "box1" in the sub procedure but pass it as a parameter....I thought this could be achieved using :
private sub disableobject(byval inobject as system.object)
inobject.readonly() = true
end sub
I am having some difficulty getting my head around passing objects between forms and hoped someone might put me on the right track... I have five forms: frmMain, frmLogin, rmAdminMode, frmUserMode, frmUserMode, frmUserModeDeepThere are two main use-cases: admin mode and user mode.Admin Mode: As the project starts it runs frmMain. Clicking a button stops the autologin (simple timer) and will invoke frmLogin (using .ShowDialog). The user is prompted for the users' ID number (four digits) and pass-code (again four digits).frmLogin will query a back-end database to authorise or reject the login attempt (this bit is all working fine) and then return control to frmMain. If the user is a valid admin frmMain will then invoke frmAdminMode.
frmMain -> frmLogin
<- frmLogin
-> frmAdminMode
[code]......
I create a form2.vb which have a report viewr and modifier set to public. In reportviewer properties i add the Report1.rdlc Now i want to pass the vlue in the textbox at report1.rdlc i use following steps and code to do it butnot sucessful yet i need ur guidelines first from menu click report ___ report parameter and set the parameter name like conparm. Then i frm2 load event i write following
[Code]...
This code works, as is, on my system. Problem lines are commented out. The last three commented lines are the problem.It creates the objects alright but a line that should send a message into the list box doesn't work. I am almost sure that the problem is in passing information into the sub routine. Forgive my use of ALL CAPS as it helps to see my comments on comments. A few comments in passing information to SRs would be helpful.
Also, how it is that I can comment out the .Name option and it still works?(I hope that this shows up properly. If it ends up as a big useless paragraph, I will repost it after learning how to do it properly.
Here is my
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' -------------------------Create ann exit Button -----------------------------------------------------
Dim btn As New Button
[code]....
I have a project that has mainly two objects, both inheriting from a base. Like this:
Public Class Vehicle
Property Model As String
Property Make As String[code].....
The above function doesn't work because myVehicle is a Vehicle, not a Truck.Is there a way I can pass around a Vehicle type and have the IDE know which type to use? Or am I completely missing a better way to do this?
I want to make a button like this:The first image is a normal button, but the second is a button with mouseEnter event fired. The bottom part of the button in the second image is not clickable and it acts like a tool tip. How can I make this kind of a button? Do I need to use a tool tip? Please give me some code examples.
EDIT:Here's F Ruffel's code which I modified:
[code]...
Now the last problem is: the expanded part pushes all controls down, and that's what I don't want. Please modify this code to make the extended part overlay controls that are below it, just like in the image.
My project uses .NET remoting. The client connects to the server hosted in IIS to do database operations.
We have a class library that is referenced both by the client and the server. This contains basic static (shared) functions used throughout the project. An example would be a function that takes a customer/invoice number and pads it with zeros/spaces to our desired format. This works fine. There is a copy of the dll with the client and on the server in the IIS virtual directory. Both the server and the client can call these functions and they work correctly.
Now, in that same class library, I've defined two things: an enumeration (enum) and a serializable class. If I try to call a function on the server from the client that passes/returns an instance of either the enumeration or the class, I get the following
[Code]...
I've got a main form (Form1.vb) where I created some controls (with the Designer).I've created a class myTextBox, inheriting from TextBox, in myTextBox.vb.In the main form, I call procedures from myTextBox. The issue is, those procedures use values from the Form controls. So the class doesn't recognise them as initialised.What's the best solution for this?I think I could pass the object itself as a parameter but doing it on each call seems a bitredundant and it thickens the code.Is there any way to access the Form1 controls and objects directly from the myTextBox.vb class?
View 6 RepliesI have an class named Foo. This class contains a collection of child objects of type FooChildBase, but I also have a further class of type FooChildTwo which inherits from FooChildBase.
Class Foo
Public Children As IList(Of FooChildBase)
End Class
Class FooChildBase
[code]....
What I would like to do is have my FooSpecial Class treat it's Children collection as if they were FooChildSpecial objects, but still be able to add FooChildTwo objects to it. Is this possible and if so how can it be done?
EDIT:I need to FooChildSpecial class to wrap any of the objects in the Children collection with the extra values, whether they are FooChildBase or FooChildTwo?
I have a procedure (parent process) that starts several processes (child processes). The child processes calculate several array variables. How can I pass those arrays to the parent process? At the moment, the child processes write the arrays to a streambuilder and the parent process reads the stream. Is there a better way to do it? Is it possible to have the child processes write to RAM memory and have the parent process read from there? It is like declaring a global variable in the parent process and give the child processes access to it.
View 4 RepliesHere's the code that is causing my problem, I have no idea why though. All necessary services have been imported.
'Creates Prompt File
Sub CreateFile()
Dim createstring As String = ""
[Code].....
I am having trouble with a mySQL query with the .NET connector. When I create the query, it automatically creates my parameters as objects. I usually change the type to the correct type, which in this case is Date, but I get different results passing in the parameter as a date.When I do "Preview Query" as an object, I get the correct results, but bad results as a Date. I would just leave them as objects, but it errors out when I try to pass a date in.Here's the part of my query that I'm having trouble with:
(Tickets.Resolved >= str_to_date(@startDate, '%m/%d/%Y')) AND (Tickets.Resolved <= str_to_date(@endDate, '%m/%d/%Y')) AND
(Tickets.Status = 'resolved' OR
Tickets.Status = 'rejected')
With the two lists (t1s and t2s), I want to display t1s in a DataGridView, and in one column show the T2 property as a comboBox column, which dropdown will show the t2s list such that a new list instance can be selected. T2 has a Name property that should be used for displaying it in the comboBoxColumn.
I'm able to display the dropdown, but remaining a few problems:
1. How to display the correct comboBox "selection" on "load"?
2. How to change the T2 child object instance when combobox selection is made?
3. This is a really basic problem, which suddenly happened and I just couldn't understand what I have changed; The code marked BLUE now just shows empty cells.. While the AutoGenerated columns do show values.. Shouldn't those "manual" columns work?
[Code]...
I have the following code:
Private Sub setDropdowns()
Using licensingModel As New licensingEntities
[code]....
My problem is that i dont know how to define the parameter type for the sub. Because they are different types of objectSets being passed each time, I thought IObjectSet(Of EntityObject) would work, but it gives me the following error:
Unable to cast object of type 'System.Data.Objects.ObjectSet1[licensingModel.tblLookup_Country]' to
type
'System.Data.Objects.IObjectSet1[System.Data.Objects.DataClasses.EntityObject]'
How can I instantiate an anonymous object while passing the propertynames and values as string?
new With { .SomeProperty = "Value" }
new With { ".SomeProperty" = "Value" }
I am passing value via an object property form1 to form2 my class was working before, but I guess when i create the instance of the form2 in form1 my calls in my class no longer work properly.
[Code]...
I have a class and method exposed to a client asp.net app. The class looks like
<DataContract()> _
Public Class Class1
Private v_string As String
Private v_integer As Integer
[code]....
The method is declared as
<OperationContract()> _
Function GetStuff(ByVal bar As Class1) As String
In the client code I create an instance of Class1 and set the values for v_string and v_integer, but using Wireshark to look at the xml being sent to the server only a value for v_string is being sent as part of Class1. I'm guessing this is because it considers the value of v_integer to be null/not set. Here is an example of the client code.
Dim MyService as New Service1.ServiceClient
Dim test as New Service1.Class1
test.P_integer = 1
[code]....
how different types are passed/used since Integer is a intergral type and String is a class, but can't seem to work out what to do to fix the problem.
I am creating a dll with all the functions and subroutines that I use all the time and I decided to create a function that I can pass different types of array to so the function obviously (or not) would have an array of type object. Now I no you can pass any type into an object type but when I pass an integer array into an object array I get an error.
value of type '1-dimensional array of integer' cannot be converted to '1-dimensional array of object' because 'integer' is not a reference type.
Shared Function CompareArray(ByVal FirstArray() As Object, ByVal SecondArray() As Object, Optional ByRef ErrorMessage As String = "") As Boolean
Dim IntArrayOne() As Integer = {1,2,3,4,5} Dim IntArrayTwo() As Integer = {1,2,3,5,6} Dim IsSame As Boolean = False IsSame = CompareArray(IntArrayOne(), IntArrayTwo())