Set A Sortedlist Object Property Value?
Nov 3, 2010
i have a sortedlist variable called :
Cart
which contains two Cartitem object and within these two objects is a further object called Product.i wish to amend the Product object Property named Quantity
["860"] = {Cartitem}
["861"] = {Cartitem}
When i attempt to update the Cartitem object using the key value it overwrites Cartitem to Product.
Present Update
Cart(key.ToString) = product
results in
["860"] = {Product}
How may i update a Product property without replacing Cartitem object to Product?
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Jul 9, 2009
1) SortedLIst has a GetKey property: you ask for the nth key in the sorted list of keys and you get it. SortedList(of TKey, TValue) does not have this kind of feature. Why not?
2) SortedList stores values as "object." Is this a less memory-effective method to store values of Double than SortedList(of TKey, TValue)?
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Aug 27, 2009
I searched on the forum / Internet for the solution how a PropetryInfo object (of a Public property) can reveal if it has a Private Protected Setter ... it was all in vain .... all help I found was about how to "Set" value of a public property having a Private Setter.I would like to know if I have a PropertyInfo object of a public property, how would I know if its Setter is Non Public?
I tried, in a exception handling block, where I did a GetValue of the PropertyInfo object and then called SetValue by setting the same value back... but to my surprise it worked well and didn error out.
[Code]...
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Jan 15, 2010
on a Windows Form, an object myObject is bound to myObjectDataBindingSource like this:myObjectDataBindingSource .DatSource = myObject on the form, i have a check box bound to the property: chkProp1 for example of the object: myObjectDataBindingSource In the code when the checkbox is clicked, I need to go in code and change another text property of the object txtProper2 for example like this:
Private Sub chkProp1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkProp1.CheckedChanged
[code].....
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Jul 4, 2011
I have a listbox of a object called Account, which has 2 fields, password, and username. How can I compare a New Account to all the accounts in the list and see if the password matches?
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Jun 7, 2012
I know how to handle a single objects property changed event very easily. I want to handle a objects property changed event that is part of another object.
Given Object:
[ObjectY = Y]
+ Public WithEvents X As ObjectX
I would like to do something like:
Private Sub XPropertyChanged() Handles Y.X.PropertyChanged
Right now I need to create a object that equals the object inside that object and then handle this variable pointers property changed, but that is just annoying.
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Aug 4, 2009
I want to assign an object property by referencing the property dynamically, with a variable name
i.e.
dim propName as string
staticObjectName.propName = 'whatever
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Nov 21, 2011
I'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.
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Jun 19, 2009
How to get the key of a sorted list from the corresponding value directly without using For Each loop. For instance in the following code snippet, I want to get the key value (and not the index) of "Canada", how?
Code Snippet:
SortedList
Imports System
Imports System.Collections
[Code]...
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Oct 28, 2011
Here's a list example
SortedList name = test
"nothing" | 0
"something" | 1
How can I go about running a for each loop or something to add each first column in test to, say a listbox.
Listbox should just have listed.
nothing
something
I tried
For Each i In text.Values
lbTest.Items.Add(i)
Next
But that produces:
0
1
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Mar 24, 2009
I have a the need for key value pair that I wish to sort so I decided to use a SortedList instead of a HashTable.I am adding the data in the order below to my SortedList which is the order I need it in
Key | Value
--------------------------------
1 "700-800" | List(Of Object)
2 "900-1000" | List(Of Object)
[code]....
The key is a string and the value is a List of objects. The key is representing a time slot that has been concatenated from two integer values and delimited by "-". "700" as a string was 0700 initially an integer.e.g.
Dim key As String = slotTimeStart.ToString() & "-" & slotTimeEnd.ToString()
But once these key value pairs are added to the SortedList they appear in the order
3 "1100-1200" | List(Of Object)
4 "1700-1800" | List(Of Object)
[code]....
Unfortunately I recieve the times slots as two integer values which cannot be changed.Is there any way to force a sort on a SortedList? or is this problem because of the way I am storing my key? Is there a better way to store it?
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Apr 25, 2011
I have a class that has a property that I declare like this:
VB.NET
Private _DirectoryList As List(Of FileDirectoryInfo) ''' <summary> ''' Array of directories. ''' </summary> ''' <value>Object</value> ''' <returns>Directory array list</returns> ''' <remarks>N/A</remarks> Public Property Directory As List(Of FileDirectoryInfo) Get Return _DirectoryList End Get Set(ByVal value As List(Of FileDirectoryInfo)) _DirectoryList = value End Set End Property
[Code]...
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Aug 6, 2011
i can get a value, a key out of a list by using index ,key or value parameters but a kvp as object ?nattelip
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Aug 8, 2011
when you use the object browser to see the features of a sortedlist elementat is not shown , but because a sorted list inherets features of ienumerable it works, cant that be corrected
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Aug 9, 2010
I'm making a sortedlist I can read a file into my program but do someone now how to show the output? Its made with classes and they will work. How to show the output of the file because I can't find.
This is the Form1
Public Class Form1
Public lijst As New SortedList(Of String, bankrekening)
'Dim spaar As spaarrekening
'Dim zicht As zichtrekening
Private Sub OverschrijvenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OverschrijvenToolStripMenuItem.Click
FrmOverschrijven.show()
[Code] .....
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Sep 3, 2009
After reading all the examples for list of T exists and Find and find first, none show how to handle multi-property objects. Below is bare bones example maybe someone could flesh out to show how this should be done.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim DatePriceList As New List(Of DateAndPrice)
DatePriceList.Add(New DateAndPrice(Date.Parse("1/1/2000"), 10.12))
DatePriceList.Add(New DateAndPrice(Date.Parse("1/2/2000"), 11.12))
[Code]...
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Feb 23, 2011
I have a txt file I' m trying to read a line and add it to the array list, I' m identying the begining of the new line with B and N charecters in the 11 and 12 th positions respectively. Now the problem is that few keys are getting dropped the structure of the file is
10000BN test 1 test2
10000S0000 test3 test 4// these are getting dropped because they are on a new line
10000S 0000 test5
so how do I add these two lines to the record
[Code]....
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Jun 9, 2010
I have a SortedList
Protected _Items As New Generic.SortedList(Of String, _Control)
I am adding items into this SortedList
_Items.Add(_key, _Control)
[code].....
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Oct 29, 2009
The code below shows me (I think) that the "for each" loop is about 10% faster than the "i to n" loop, but the "for each" loop creates 567k in new memory? Is this right? Which way is generally most efficient with regards to speed and memory usage? If you want to run this code in VB just add a button and 2 labels to a form.
[Code]...
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Dec 22, 2010
[code]I understand the error is saying I've got a null pointer reference happening, but I don't understand why.
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May 19, 2012
I have a qeustion where i made a function that changes the property value of an object. the objects + alias are stored in an array (Objects()) , if the var (NewValue) has a value then it checks the property type and converts the Newvalue and inputs it.
[Code]...
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Mar 9, 2012
I'm currently writing a HMI for an automated machine in VB.Net 2010. I have a custom class that turns a Border green or red depending on the value of an input on a remote I/O module.
The connection to the remote I/O module is through a COM object provided by the manufacturer. I have three remote connections, lets' call them g1, g2, and g3. They're of type Manufacturer.ConnectionObject.
I would like to specify, using a property that I can set in XAML, that instances of MyCustomBorder use g1, g2, or g3. Unfortunately, setting up a Property called g and typing 'g1' into the property field results in the message "Property value is not valid. Details: Property 'g' does not support String to Value conversion."
[code...]
I need to implement a converter between String and the custom class, Manufacturer.ConnectionObject, but I have no idea how to accomplish this, especially since Manufacturer.ConnectionObject is part of a closed-to-me COM object.
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Aug 26, 2009
I want to create a class that inherit from a polygon this is not possible because the polygon is not inheritable. I want to create a class that handle a polygon anyway and it behave like a polygon. Wile with the property i can pass the value from the class to the polygon but if I want to do something like
[Code]...
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Oct 20, 2011
Is it possible to handle a property as an object?I want to reach a property as an object , not through its owner.
Dim prop as object = UNKNOWN_FUNC(btnTest.Text)
prop = "New text of btnText.Text" '
I want to modify Text property of btnTest by this way..
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Jan 6, 2012
I want to do translation recursively on all components in my form. So my function will start on the form. Before the recursion, it's obvious that I have to know what property containing the children that the current Object has.[code]...
The method I want to use it, I will check if the current object has property Items if not, check if it has property Tabs, and so on... Then the last fallback, check if it has property Controls.
Now the very question how could I check if the current object has specific Property?
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Jul 10, 2010
I 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").
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Feb 15, 2012
I'm a C# coder, and I have trouble even reading VB.NET, so please forgive what may turn out to be an incredibly dumb question. But I have some code which looks like this:
CODE:
So, ignoring the fact that the syntax is probably wrong - how does VB.NET get the Name property from sourceObject? Inspecting it at run-time reveals that sourceObject is of a type that supports a property called Name with a getter, but what does VB.NET do in this case? Is there some extra code that is being generated by the compiler to somehow cast this automagically at run-time?
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Feb 22, 2012
I found C# code for it here. So I tried
Public Function checkProperty(ByVal objectt As Object, ByVal propertyy As String) As Boolean
Dim type As Type = objectt.GetType
Return type.GetMethod(propertyy)
End Function
But it throws an error at type.GetMethod(propertyy) saying "Value of type 'System.Reflection.MethodInfo' cannot be converted to 'Boolean'."
What to do?
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Mar 23, 2012
When I execute this subroutine it throws an error,
"The value of a property that is part of an object's key does not match the corresponding property value stored in the ObjectContext. This can occur if properties that are part of the key return inncosistent or incorrect values or if DetectChanges is not called after changes are made to a property that is part of the key."
Here is the code and below it I've explained briefly what the code does.
Protected Sub btnUpdate_Click(sender As Object, e As EventArgs) Handles btnUpdate.Click
Dim semester As String = ddlwhSemester.SelectedValue
[Code].....
The above code is used to pull records from a SIS (essentially a higher ed CRM) into my webHousing application (for on-campus residents). It gets a list of everyone who is a student for the select semester/year and then inputs them into the webHousing database if they don't already exist for that semester/year.
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Oct 31, 2010
On form1 I put a picturebox from the toolbox.[code]Is it possible to set picturebox.visible=true of the inherited picturebox?
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