I am new to VB please assist. I have an application where I search using combo box and two textboxes. Now it is not always when all textboxes have text. Sometimes the user can search using one textbox. My problem is when I leave out a textbox that searches an integer column is using binding source find method I get : 'Input string was not in a correct format.' because the textbox is empty. My database is access database and I am searching from a gridview binding source. How can I allow txtboxIdSize to be ignored if not used? My code below:
Private Sub btnSearch_Click(sender As Object, e As EventArgs) Handles btnSearch.Click
TblDiesBindingSource.Filter = $"Descript LIKE '%{txtDescription.Text.Trim()}%'"
TblDiesBindingSource.Position = TblDiesBindingSource.Find("IDSIZE", txtIdSize.Text)
End Sub
Private Sub btnSearch_Click(sender As Object, e As EventArgs) Handles btnSearch.Click
If txtboxIdSize.TextLength > 0 then
TblDiesBindingSource.Filter = $"Descript LIKE '%{txtDescription.Text.Trim()}%'"
TblDiesBindingSource.Position = TblDiesBindingSource.Find("IDSIZE", txtIdSize.Text)
End if
End Sub
Related
I would like to make a small application what can make easier my work.
I have to make one ordering process some labels where I have a plan and from the plan I have to one excel list making with the labelnames what will be printed by the Manufacturer. We have a lot of type of the label (names) but they are fixing. (160 pieces differentnames).
So I make this always if I get a new plan then I make new label-list. I do it alway by hand cell by cell.. Sometime I have to filling out 400 cell for one plan... I don’t have a lot’s of time to this..
So I started making my first Windows app with Visual Studio(in Windows From – Visual Basic).
I found some cool video, so I already have the „basics”.
I connected one MS Access database to my Project where I would like to store the datas.
And now i have trouble.. I have some Comboboxes. I would like to choose some cases and then I would like to update the database where the rows will be filled with the correct values. If its done, i can this exporting to excel and sendig forward to the Manufacturer.
I have a textbox where I write the Plan name (it linked to the database first Column)
And then:
So the Combobox1 have Sektor A, B, C, D ,E, F (six value)
The Combobox2 have 09RRU, 09RSU, 18RRU ... empty - (eight value)
The Combobox3 have 21RRU, 21RSU, 26RRU ... empty - (eight value)
The Combobox4 have ja or nein (only two value)
and so on.. I have 8 Combobox.
My Idea:
If I select the Sektor A and 09RRU , the another two is empty and nein, then I click on the Update button I would like to get back in database 09.SekA1, 09.SekA2, AISG.SekA
If I select the Sektor A and 09RRU and 21RRU and ja, then after click Update, I would like get 09.SekA1, 09.SekA2, 21.SekA1, 21.SekA2, 09.21.SekA1, 09.21SekA2, AISG.09.21.SekA
….
I can every type of labels line by line writing if needed, I think I have to do this. I don’t think so can I dynamic Arrays making which can the different String e.g. ( Text (09) & Text (.SekA) & Text(1)) creating. I just now started the VB..
Private Sub ComboBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox8.SelectedIndexChanged
SektorForm1()
End Sub
Private Sub ComboBox2_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
End Sub
Private Sub ComboBox3_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox2.SelectedIndexChanged
End Sub
Private Sub ComboBox4_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox3.SelectedIndexChanged
End Sub
Private Sub SektorForm1()
BEschriftungenDataSet.Standort.RRU18Column = "18.SekA1"
BEschriftungenDataSet.Standort.RRU21Column = "18.SekA2"
BEschriftungenDataSet.Standort.RRU26Column = "AISG.18.SekA"
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.StandortTableAdapter.Fill(Me.BEschriftungenDataSet.Standort)
ComboBox1.SelectedIndex = 5
ComboBox2.SelectedIndex = 3
ComboBox3.SelectedIndex = 3
ComboBox4.SelectedIndex = 1
ComboBox5.SelectedIndex = 1
ComboBox6.SelectedIndex = 1
ComboBox7.SelectedIndex = 1
ComboBox8.SelectedIndex = 0
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
On Error GoTo SaveErr
StandortBindingSource.EndEdit()
StandortTableAdapter.Update(BEschriftungenDataSet.Standort)
MessageBox.Show("Saved")
End Sub
Could some one for me Helping what is wrong in my code? I tried some data inserting to tha database when I choose someting in Combobox1 but it doesn't work..
I get failures: BC30526 Property'RRU18Column' is 'ReadOnly' and BC30311 Value 'String' cannot be converted to 'DataColumn'..
And giving some help how I sould staring building up my cases to my Combobox chooses..
Thanks guys
I have a masked textbox set to date.short I would like to automate the cuurentdate to be filled in when the masked textbox is clicked I though the following would work but I get the error InvalidCastExpectation was ungandeld "Application is in break mode"
Private Sub MaskedTextBox1_Click(sender As Object, e As MaskInputRejectedEventArgs) Handles MaskedTextBox1.Click
MaskedTextBox1.Text = DateTime.Now.ToString("dd/MM/yyyy")
End Sub
I also thought about changing ("dd/MM/yyyy") to ("dd-MM-yyyy") but this also dosnt fix it?
The Click event does not use the MaskInputRejectedEventArgs parameter:
Private Sub MaskedTextBox1_Click(sender As Object, e As EventArgs)
Handles MaskedTextBox1.Click
I want to add the same event on my multiple textboxes. Let's say for example I want all my textboxes to trim the text value of itself when it has lost focus
my idea is to loop through all the textboxes and to add an event handler to all of it, but how will I refer to the textbox itself, I think it is the same as using the "this" keyword, but it is not available in vb.net - any other recommendations?
In order to get the element which triggered the event you can use the sender parameter of the event and cast it to the required type. It is not clear from the question which platform you are using, but below is the sample code for Windows Forms:
Private Sub txt1_TextChanged(sender As Object, e As EventArgs) Handles txt1.TextChanged
Dim currentTextbox as TextBox = CType(sender, TextBox)
' Do what you want with the textbox
End Sub
Similar principles should apply to Web forms or WPF as well.
Through all the textboxes Use handles for all textboxes
Private Sub TextBox1_LostFocus(sender As Object, e As EventArgs) _
Handles TextBox1.LostFocus, TextBox2.LostFocus
Dim txtBox As TextBox = sender
txtBox.Text = Strings.Trim(txtBox.Text)
End Sub
I am new to Visual Basic. I have installed Microsoft Visual Studio 2010. Created a new Windows Form Application. As an example, I made a simple program which will ask the end user to input 2 numbers and allow them to either add them or subtract the second number from the first one and display the output in a Textbox.
Now, I added another Subroutine which would be executed automatically when the Windows Form loads. This would calculate the width of the output Textbox and the Form Width and display at the bottom.
This is how the code looks like right now:
Public Class Form1
' Run this Subroutine initially to display the Form and Text box width
Private Sub Form_Load()
Label5.Text = TextBox3.Width
Label7.Text = Me.Width
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim a As Integer
Dim b As Integer
a = TextBox1.Text
b = TextBox2.Text
TextBox3.Text = a + b
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim a As Integer
Dim b As Integer
a = TextBox1.Text
b = TextBox2.Text
TextBox3.Text = a - b
End Sub
End Class
While everything works correctly for the addition and subtraction, it does not display the Form and output Textbox width in the Windows Form.
I think, Form_Load() is not executing properly.
I also tried, Form_Activate() but that did not work either.
Once I am able to do this, I would like to extend this concept to resize the output Textbox along with the Form resize. However, for the purpose of understanding I wanted to see if I can execute Form_Load() successfully.
Thanks.
Form_Load doesn’t execute. For now, it’s just any other method. In order to tell VB to make this method handle the Load event, you need to tell it so:
Private Sub Form_Load(sender As Object, e As EventArgs) Handles MyBase.Loasd
Label5.Text = TextBox3.Width
Label7.Text = Me.Width
End Sub
(And add the required parameters for the event.)
A few other remarks:
Ensure that Option Strict On is enabled in your project options at all times. This will make the compiler much stricter with your code and flag more errors. This is a good thing since these errors are potential bugs. In particular, your code is very lax with conversions between different data types, these should be made explicit.
Initialise variables when you declare them, don’t assign a value in a separate statement. That is, write this:
Dim a As Integer = Integer.Parse(TextBox1.Text)
(Explicit conversion added as well.)
If you want to make a control fill the form, you can just set its Dock property appropriately in the forms editor, instead of having to program this manually.
You need to add the Handle so the app executes it automatically:
Private Sub Form_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
'...
End Sub
When I load the form where some text has been given to text box. All the text in that textbox is highlighted. I want vb not to load it this way.
How to fix it.
Thanks
Furqna
You could set the tab index on your textbox to something else so that it's not the lowest index.
You could set the TextBox1.SelectionLength = 0 in the form.activated event.
I don't like this as much because if the user had the text hilited and minized the application then they will lose the hilite, but is fairly easy to do. I guess you could use a flag to make sure it only did it on the first activate.
You could set a timer event in the load to clear it immediately after the load event, but that seems like overkill. I have worked at places where they had a standard function that happened on every form 100 ms after load because of problems such as this.
You could try this(it looks like a workaround):
Private Sub TextBox1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.GotFocus
TextBox1.SelectionStart = TextBox1.Text.Length
End Sub
It depends on the TabIndex of your TextBox, if it has the lowest TabIndex it gets focus and therefore it's Text is selected.
' VS.net 2013. Use the "Shown" event.
' GotFocus isn't soon enough.
Private Sub Form_Shown(sender As Object, e As EventArgs) Handles Me.Shown
TB.SelectionLength = 0
End Sub
Type 1 Method
Dim speech = CreateObject("sapi.spvoice")
speech.speak(TextBox1.Text)
Type 2 Method
Dim oVoice As New SpeechLib.SpVoice
Dim cpFileStream As New SpeechLib.SpFileStream
'Set the voice type male or female and etc
oVoice.Voice = oVoice.GetVoices.Item(0)
'Set the voice volume
oVoice.Volume = 100
'Set the text that will be read by computer
oVoice.Speak(TextBox1.Text, SpeechLib.SpeechVoiceSpeakFlags.SVSFDefault)
oVoice = Nothing
Type 3 Method
Imports System.Speech.Synthesis
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim spk As New SpeechSynthesizer
For Each voice As InstalledVoice In spk.GetInstalledVoices
ListBox1.Items.Add(voice.VoiceInfo.Name)
Next
ListBox1.SelectedIndex = 0
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim spk As New SpeechSynthesizer
spk.SelectVoice(ListBox1.SelectedItem.ToString)
spk.Speak(TextBox1.Text)
End Sub
End Class
This will also happen sometimes if The TextChanged or other similar Event is fired twice for the control.
When creating each form. Each object is indexed you can set the tab Index higher then the indexed object. Example: On the third form you put a text box in.
private void textBox1_TextChanged(object sender, EventArgs e)
This was the 12th object in the project, it would be indexed at 12. if you put the tab index higher then the indexed objects throughout the project. Tab index 1000 (problem solved.)
Have a great day.
Scooter