I am working On VB and Arduino At same time. My main intention is to get data serially displayed on Textbox of VB
Now i wanted to how can assign string or Serial data out put to textbox.
I have google it but the sytax is not working
I created simple textbox AND assigned variable abcd , Now i wanted to display Abcd on text box.
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
TextBox1.Text = "ABCD"
End Sub
If i wanted to read serial data display it on textbox
Private Sub Current_Read_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
SerialPort1.Open()
Dim str As String
str = SerialPort1.ReadExisting
Current_Read.Text = str
SerialPort1.Close()
End Sub
So why it not working
Your code doesn't result as you expected because the code which you are using will executed only when you type any thing in the textbox, while using this code you can't able to type anything in the textbx when you type any thing in it will result in "ABCD". to avoid this
Move this code TextBox1.Text = "ABCD" from TextBox1_TextChanged event to form_Load event. that is
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
TextBox1.Text = "ABCD"
End Sub
Try this for some reason. Add a button and double click the button so you can write your code to the event Button_Click
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
SerialPort1.Open()
Dim str As String
str = SerialPort1.ReadExisting
Current_Read.Text = str
SerialPort1.Close()
End Sub
run the application. and click the button
Related
Hi so im playing with microsoft visual studio 2010 edition and I need to make an if statement work on it.
What im doing is putting a number into a textbox, it then goes into my listbox (however many times I put numbers in like 3-4 numbers). Then it is meant to add them all up and put it into the label after.
Heres the program so far
Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim Result As Integer
For Each Item As Integer In ListBox1.Items
Result = Result + Item
Next
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Value As String
Value = TextBox1.Text
ListBox1.Items.Add(Value)
End Sub
Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click
Label1.Text = "You have a Balance of " + DialogResult.ToString
End Sub
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
End Sub
Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
If (String.a
End Sub
End Class
In Visual Basic .NET (which is what your code looks to be in), If statements are formatted like this:
If condition Then
DoSomeCodeHere()
End If
C# code is formatted as
if (condition)
{
DoSomeCodeHere();
}
Do you mean you wan the sum all the amount in the list box and show it in a label after clicking button 2?
If yes add the below should do.
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim Result As Integer
For Each Item As Integer In ListBox1.Items
Result = Result + Item
Next
Label1.Text = "You have a Balance of " + Result.ToString
End Sub
I am trying to pass a value of a textbox on frmMain to a textbox on frmDepartment. I have tried the following code which I thought would work but it dosen't. I ma a new user to VB and come from a php background where it would have been a simple task of setting a seesion. Can anyone help with this? If you need to see more code, please ask. many thanks
txtDeptCustomer.Text = frmMain.txtCustomerActive.Text
In frmMain, I am getting value like this:
Dim value As Object = UserDataGridView.Rows(e.RowIndex).Cells(0).Value
txtCustomerActive.Text = CType(value, String)
Private Sub btnDepts_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDepts.Click
frmDepartment.Show()
End Sub
Which is showing in frmMain ok.
In frmDepartment I have this code
Private Sub txtDeptCustomer_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtDeptCustomer.TextChanged
'Dim customer As String
txtDeptCustomer.Text = frmMain.txtCustomerActive.Text
End Sub
instead of putting the code within the txtDeptCustomer.TextChanged sub, try putting it within the frmDepartment_load:
Private Sub frmDepartment_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
txtDeptCustomer.Text = frmMain.txtCustomerActive.Text
End Sub
or you could set the frmDepartment text box text on the frmMain button click:
Private Sub btnDepts_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDepts.Click
frmDepartment.txtDeptCustomer.Text = txtCustomerActive.Text
frmDepartment.Show()
End Sub
Using VB.Net (Windows Application)
In the form (called as FirstForm), i am using textbox, add-form Button, search button.
When i click the add-form button, it will give the new form (same as FirstForm)
Code for adding new form
Private Sub btnadd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnadd.Click
Dim SecondForm As New FirstForm
SecondForm.Show()
End Sub
Search Button Code
Private Sub Search_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Search.Click
If FirstForm.Focus = True Then
FirstForm.textbox1.Text = gridview1.Rows(crRow).Cells("code").Value.ToString().Trim()
Else
Dim SecondForm As New FirstForm
SecondForm.textbox1.Text = gridview1.Rows(crRow).Cells("code").Value.ToString().Trim()
End If
End Sub
The above code is working, but If i am in second Form when i click the search button and selected the value, then the value is appearing in the FirstForm textbox, it is not appearing in the SecondForm textbox.
If SecondForm is showing, the selected Value should appear in the SecondForm textbox not in the FirstForm Textbox.
How to solve this issue.
Need Vb.net code Help
Use Me - Reference variable which hold ref. of current form.
Dim frm As FirstForm
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
If IsNothing(frm) OrElse frm.IsDisposed Then
frm = New FirstForm
End If
frm.Show()
End Sub
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
Me.textbox1.Text = gridview1.Rows(crRow).Cells("code").Value.ToString().Trim()
End Sub
Using "me" will not solve the problem?? why are you referring to the form in a static way?
Private Sub Search_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Search.Click
textbox1.Text = gridview1.Rows(crRow).Cells("code").Value.ToString().Trim()
End Sub
I have multiple textbox in a form. How do I know what textbox the cursor currently is?
Trying to do something like this:
If TextBox2.Focus() = True Then
MessageBox.Show("its in two")
ElseIf TextBox3.Focus = True Then
MessageBox.Show("its in three")
End If
But I think its not working.
TextBox.Focus actually assigns the focus to the given textbox. What you're looking for is TextBox.Focused. :)
In fact, all form controls have the Focused property.
I know this already has an accepted answer but I just think this method is a bit easier and should be up here for people who find this through Google or whatever.
Public focussedTextBox As TextBox
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
For Each control As Control In Me.Controls
If control.GetType.Equals(GetType(TextBox)) Then
Dim textBox As TextBox = control
AddHandler textBox.Enter, Sub() focussedTextBox = textBox
End If
Next
End Sub
This way you can then just refer to the focussedTextBox at any time. You should make sure that you check that there is a focussedTextBox before you do however becuase when the application first loads there will not be. You can do this using:
If Not focussedTextBox Is Nothing Then
...
End If
Alternatively, you could set focussedTextBox to a TextBox of your choice on form load, either by setting its value or by focussing the TextBox.
Obviously, it will not work if you are calling your code in a Button_Click because when you click the Button then the focus is itself goes to the Button which you have clicked.
You can do two things:
Make a combined Focus event for all TextBoxes and check its Sender object.
Private Sub TextBox_Focus(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.Enter, TextBox3.Enter
Dim currTextBox As TextBox = sender
If currTextBox.Equals(TextBox2) Then
MessageBox.Show("it's in two")
ElseIf currTextBox.Equals(TextBox3) Then
MessageBox.Show("it's in three")
End If
End Sub
OR
Take a global string variable, and set its value at each TextBox_Focus event, then check string value in the button click event.
Dim str As String
Private Sub TextBox2_Focus(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.Enter
str = "two"
End Sub
Private Sub TextBox3_Focus(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox3.Enter
str = "three"
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MessageBox.Show("it's in " & str)
End Sub
give me code, in which i can enter a word in a textbox and a listbox appear with a item that has same string in which i enter in a textbox.
Please Help me...
I found the following via Google, which sound like the type of things you want to do:
Autosearch ListBox in VB.NET
(WinForms)
Search Listboxes as You Type
(WinForms or is this VB6?)
Searching for items in a ListBox
(WPF)
Using # 1, here is some code:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
List1.Items.Add("Computer")
List1.Items.Add("Screen")
List1.Items.Add("Modem")
List1.Items.Add("Printer")
List1.Items.Add("Scanner")
List1.Items.Add("Sound Blaster")
End Sub
Private Sub Text1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Text1.TextChanged
Dim i As Integer = List1.FindString(Text1.Text)
List1.SelectedIndex = i
If Text1.Text = "" Then
List1.SelectedIndex = -1
End If
End Sub
Think pseudocode, you can do this.
Grab the text from the textbox.
Set a pointer / counter to the listbox and loop through each item until the end of the list. If the textbox value has the same value as the listboxitem.text then you've found a match exit the for loop.
Add this code to texboxchange
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
ListBox1.SelectedIndex = ListBox1.FindString(TextBox1.Text.Trim)
End Sub