https://imgur.com/a/gaXh4
Ok so I have a problem a really weird problem. So I created a new class which is a new type of TextBox. It keeps track of the objects created from it with the help of a list but. This all works, with for each I can get all objects of the class but when I want to convert the string from the TextBox into a integer I can't do it because it thinks its not convertable eventhought the string only consists out of number symbols
Code for Button
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
'TextBox1.Text = CInt(SumTextBox1.Text) + CInt(SumTextBox2.Text)
For Each item As SumTextBox In SumTextBox.sumList
Dim textItem As SumTextBox = item
TextBox1.Text = CInt(TextBox1.Text) + CInt(textItem.Text)
Next
End Sub
Public Class SumTextBox
Inherits TextBox
Public Shared sumList As New List(Of SumTextBox)
Sub New()
Size = New Size(90, 10)
sumList.Add(Me)
End Sub
End Class
Try using Convert.toInt32(TextBox1.Text) and the same for textitem.text
Related
I need help, so I can compare the text from the text booths that are in these 3 groupboxes.
This is what my form looks like:
Private Sub frmCompareAdress_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim firstGroupBoxFields() As String = {TextBoxVorname1.Text, TextBoxName1.Text, TextBoxStrasse1.Text, TextBoxPLZ1.Text, TextBoxOrt1.Text, TextBoxTelefon1.Text}
Dim secondGroupBoxFields() As String = {TextBoxVorname2.Text, TextBoxName2.Text, TextBoxStrasse2.Text, TextBoxPLZ2.Text, TextBoxOrt2.Text, TextBoxTelefon2.Text}
Dim thirdGroupBoxFields() As String = {TextBoxVorname3.Text, TextBoxName3.Text, TextBoxStrasse3.Text,TextBoxNr3.Text, TextBoxPLZ3.Text, TextBoxOrt3.Text, TextBoxTelefon3.Text}
ComparisonFieldsfirstGroupBoxFields, secondGroupBoxFields, thirdGroupBoxFields)
End Sub
Public Sub ComparisonFields(ByVal firstGBFields() As String, secondGBFields() As String, thirdGBFields() As String)
Dim notCompareFileds = String.Join(", ", firstGBFields.Except(secondGBFields))
'what to do next? I'm a little confused if I'm on the right track
End Sub
Now if, for example, the textBox1Vorname.Text is different from the textBox2Vorname.Text or textBox3Vorname.Text, I want to mark them in red.
I imagined it in a way, to compare as an array, and I put it in 3 array values from textboxes.
Can anyone help me further with this function?
Thank you for your help.
Public Shared Function HaveSameText(ParamArray controls() As Control) As Boolean
Return controls.All(Function(c) c.Text = controls(0).Text)
End Function
Public Shared Sub ColorAllRed(ParamArray controls() As Control)
For Each c In controls
c.ForeColor = Color.Red
Next
End Sub
Public Shared Sub ColorAllRedIfNotSameText(ParamArray controls() As Control)
If Not HaveSameText(controls) Then ColorAllRed(controls)
End Sub
Private Sub frmCompareAdress_Load(sender As Object, e As EventArgs) Handles MyBase.Load
ColorAllRedIfNotSameText(TextBoxVorname1, TextBoxVorname2, TextBoxVorname3)
ColorAllRedIfNotSameText(TextBoxName1, TextBoxName2, TextBoxName3)
ColorAllRedIfNotSameText(TextBoxStrasse1, TextBoxStrasse2, TextBoxStrasse3)
ColorAllRedIfNotSameText(TextBoxPLZ1, TextBoxPLZ2, TextBoxPLZ3)
ColorAllRedIfNotSameText(TextBoxOrt1, TextBoxOrt2, TextBoxOrt3)
ColorAllRedIfNotSameText(TextBoxTelefon1, TextBoxTelefon2, TextBoxTelefon3)
End Sub
I have a class called DataStorage that stores all of the publicly declared variables that I use in my program. My main class calls a public array from DataStorage and fills it with values. The main class then calls up a windows form and populates the textboxes on it with the values in the array. However, when I run the program, the form comes up with blank textboxes. I don't understand why this would be the case. I also tried populating the textboxes from the load function of the form rather than in the main class. I debugged and stepped through my code, and the main class filled the array with values fine. But when the form was called, and I started stepping through the code to populate the textboxes, it said the array was equal to nothing. If the array is stored in a separate class that both the main class and the form call, why are the values getting set to null between the main class and the form?
Here is what my code looks like:
Public Class Main
Private ds As New DataStorage
Public Sub Test()
For i = 0 to 2
ds.Info(i) = "Hello"
Next
Form1.ShowDialog()
End Sub
End Class
Public Class DataStorage
Public Info() As String
End Class
Public Class Form1
Private ds As New DataStorage
Private Sub Form1_Load(sender As Object, e As EventAgrs) Handles MyBase.Load
Textbox1.Text = ds.Info(0)
Textbox2.Text = ds.Info(1)
Textbox3.Text = ds.Info(2)
End Sub
I just called it Form1; the program starts with the sub Test in the main class.
I just need a way to have variables/arrays that are accessible by any class or form and don't change value or get set to null unless I tell it to.
You must give your array a size before you try to fill it.
Public Class TestArray
Private ds As New DataStorage
Private Sub TestArray_Load(sender As Object, e As EventArgs) Handles MyBase.Load
FillArray()
TextBox1.Text = ds.Info(0)
TextBox2.Text = ds.Info(1)
TextBox3.Text = ds.Info(2)
End Sub
Public Sub FillArray()
For i = 0 To 2
ds.Info(i) = "Hello"
Next
End Sub
End Class
Public Class DataStorage
Public Info(2) As String
End Class
If you don't want to give a size then use a List(Of T)
Public Class TestArray
Private ds As New DataStorage
Private Sub TestArray_Load(sender As Object, e As EventArgs) Handles MyBase.Load
FillList()
TextBox1.Text = ds.Info(0)
TextBox2.Text = ds.Info(1)
TextBox3.Text = ds.Info(2)
End Sub
Public Sub FillList()
For i = 0 To 2
ds.Info.Add("Hello")
Next
End Sub
End Class
Public Class DataStorage
Public Info As New List(Of String)
End Class
So my problem is:
I have a List of a custom Type {Id as Integer, Tag() as String},
and i want to perform a multiple-criteria search on it; eg:
SearchTags={"Document","HelloWorld"}
Results of the Search will be placed a ListBox (ListBox1) in this format:
resultItem.id & " - " & resultItem.tags
I already tried everything i could find on forums, but it didn't work for me (It was for db's or for string datatypes)
Now, i really need your help. Thanks in advance.
For Each MEntry As EntryType In MainList
For Each Entry In MEntry.getTags
For Each item As String In Split(TextBox1.Text, " ")
If Entry.Contains(item) Then
If TestIfItemExistsInListBox2(item) = False Then
ListBox1.Items.Add(item & " - " & Entry.getId)
End If
End If
Next
Next
Next
Example Custom Array:
(24,{"snippet","vb"})
(32,{"console","cpp","helloworld"})
and so on...
I searched for ("Snippet vb test"):
snippet vb helloWorld - 2
snippet vb tcpchatEx - 16
cs something
test
So, i'll get everything that contains one of my search phrases.
I expected following:
snippet vb tcp test
snippet vb dll test
snippet vb test metroui
So, i want to get everything that contains all my search phrases.
My entire, code-likely class
Imports Newtonsoft.Json
Public Class Form2
Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
End Sub
Dim MainList As New List(Of EntryType)
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
MainList.Clear()
Dim thr As New Threading.Thread(AddressOf thr1)
thr.SetApartmentState(Threading.ApartmentState.MTA)
thr.Start()
End Sub
Delegate Sub SetTextCallback([text] As String)
Private Sub SetTitle(ByVal [text] As String) ' source <> mine
If Me.TextBox1.InvokeRequired Then
Dim d As New SetTextCallback(AddressOf SetTitle)
Me.Invoke(d, New Object() {[text]})
Else
Me.Text = [text]
End If
End Sub
Sub thr1()
Dim linez As Integer = 1
Dim linex As Integer = 1
For Each line As String In System.IO.File.ReadAllLines("index.db")
linez += 1
Next
For Each line As String In System.IO.File.ReadAllLines("index.db")
Try
Application.DoEvents()
Dim a As saLoginResponse = JsonConvert.DeserializeObject(Of saLoginResponse)(line) ' source <> mine
Application.DoEvents()
MainList.Add(New EntryType(a.id, Split(a.tags, " ")))
linex += 1
SetTitle("Search (loading, " & linex & " of " & linez & ")")
Catch ex As Exception
End Try
Next
SetTitle("Search")
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Dim searchTags() As String = TextBox1.Text.Split(" ")
Dim query = MainList.Where(Function(et) et.Tags.Any(Function(tag) searchTags.Contains(tag))).ToList
For Each et In query
ListBox1.Items.Add(et.Id)
Next
End Sub
Private Sub Button4_Click(sender As Object, e As EventArgs) ' test
MsgBox(Mid(ListBox1.SelectedItem.ToString, 1, 6)) ' test
End Sub 'test, removeonrelease
End Class
Public Class EntryType
Public Property Id As Integer
Public Property Tags() As String
Public Sub New(ByVal _id As Integer, ByVal _tags() As String)
Me.Id = Id
Me.Tags = Tags
End Sub
Public Function GetTags() As String
'to tell the Listbox what to display
Return Tags
End Function
Public Function GetId() As Integer
'to tell the Listbox what to display
Return Id
End Function
End Class
I also edited your EntryType class; I added a constructor, removed toString and added GetTags and GetID.
Example "DB" im working with ("db" as "index.db" in exec dir):
{"tags":"vb.net lol test qwikscopeZ","id":123456}
{"tags":"vb.net lol test","id":12345}
{"tags":"vb.net lol","id":1234}
{"tags":"vb.net","id":123}
{"tags":"cpp","id":1}
{"tags":"cpp graphical","id":2}
{"tags":"cpp graphical fractals","id":3}
{"tags":"cpp graphical fractals m4th","id":500123}
Error:
Debugger:Exception Intercepted: _Lambda$__1, Form2.vb line 44
An exception was intercepted and the call stack unwound to the point before the call from user code where the exception occurred. "Unwind the call stack on unhandled exceptions" is selected in the debugger options.
Time: 13.11.2014 03:46:10
Thread:<No Name>[5856]
Here is a Lambda query. The Where filters on a predicate, since Tags is an Array you can use the Any function to perform a search based on another Array-SearchTags. You can store each class object in the Listbox since it stores Objects, you just need to tell it what to display(see below).
Public Class EntryType
Public Property Id As Integer
Public Property Tags() As As String
Public Overrides Function ToString() As String
'to tell the Listbox what to display
Return String.Format("{0} - {1}", Me.Id, String.Join(Me.Tags, " "))
End Function
End Class
Dim searchTags = textbox1.Text.Split(" "c)
Dim query = mainlist.Where(Function(et) et.Tags.Any(Function(tag) searchTags.Contains(tag))).ToList
For Each et In query
Listbox1.Items.Add(et)
Next
I am trying to find if mylines() contains a value or not. I can get the value by mylines.Contains method:
Dim mylines() As String = IO.File.ReadAllLines(mypath)
If mylines.Contains("food") Then
MsgBox("Value Exist")
End If
But the problem is that I want to check if mylines() contains a line which starts with my value. I can get this value from a single line by mylines(0).StartsWith method. But how do I find a string from all the lines which is starting from some value, e.g. "mysearch" and then get that line number?
I am using a for loop to do so, but it is slow.
For Each line In mylines
If line.StartsWith("food") Then MsgBox(line)
Next
Constrained to code for .NET 2.0, please.
Here's one way with Framework 2.0 code, simply set SearchString with the the string you want to search for:
Imports System.IO
Public Class Form1
Dim SearchString As String = ""
Dim Test() As String = File.ReadAllLines("Test.txt")
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
SearchString = "Food"
End Sub
Private Function StartsWith(s As String) As Boolean
Return s.StartsWith(SearchString)
End Function
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim SubTest() As String = Array.FindAll(Test, AddressOf StartsWith)
ListBox1.Items.AddRange(SubTest)
End Sub
End Class
When I test this with a file with 87,000 lines, it takes about .5 sec, to fill the listbox.
I'm not a VB guy, but I think you could use Linq:
Dim mylines() As String = IO.File.ReadAllLines(mypath)
??? = mylines.Where(Function(s) s.StartWith("food")) //not sure of the return type
Check out: How do I append a 'where' clause using VB.NET and LINQ?
In the code below b textbox will contain the string "a.text" what I want b textbox to be the evaluation of the content of the string "a.text" which is the word Test. Please don't suggest:
b.text = a.text
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim t As String
a.Text = "Test"
t = "a.text"
b.Text = t
End Sub
End Class
Check out Controls collection of your form. You can find an item based on its name.
Also check out this answer
VB .NET Access a class property by string value
So, you could take your string, split it by the ".", find the control using the Controls Collection, and then get the property using the second half of your string using Reflection.
Of course, if you are just looking for the Text of the textbox, you just need to use the collection and forget the reflection. Like this..
For i As Integer = 1 To 25
.fields("Field" & i).value = Me.Controls("QAR" & i).Text
Next
You can do what you asked for using Reflection ... I'm not an enormous fan of it for something like this, but here's how it would look in your code:
Imports System.Reflection
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
a.Text = "Hello"
Dim t As String = "a.Text"
b.Text = DirectCast(SetValue(t), String)
End Sub
Public Function SetValue(ByVal name As String) As Object
Dim ctrl As Control = Me.Controls(name.Split("."c)(0))
Return ctrl.GetType().GetProperty(name.Split("."c)(1)).GetValue(ctrl, Nothing)
End Function
End Class
This would set textbox a's value to "Hello" and then copy that to textbox b using the reflection method.
Hope this helps!