I am new in Vb.net. I'm still studying the logics in this language. I want to output data in a label.text from form 1 to form 2 with the use of a button. How can I do that while both forms are running?
PS. label.text may change value every time I click the button.
Here are two options.
Use a property setter
Use a method
Note: The code below assumes the following:
Form1: Button (name: Button1)
Form2: Label (name: Label1)
When the button is clicked on Form1, if Form2 isn't open, it opens it. Additionally, the value of the label on Form2 is set.
Option 1: (use a property setter)
Form1.vb
Public Class Form1
Dim counter As Integer = 0
Dim f2 As Form2 = Nothing
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If f2 Is Nothing Then
'create new instance
f2 = New Form2
'show form
f2.Show()
Else
'show window
'if window is minimized, it will "unminimize" it
'f2.WindowState = FormWindowState.Normal
'bring window into focus
'also brings the window to front
'f2.Activate()
End If
'set value
Dim username As String = String.Format("user{0}", counter)
'set property value
f2.Username = username
counter += 1
End Sub
End Class
Form2.vb
Public Class Form2
Dim _username As String = String.Empty
Public Property Username As String
Get
Return _username
End Get
Set(value As String)
_username = value
Label1.Text = value
Label1.Refresh()
End Set
End Property
End Class
Option 2: (use a method)
Form1.vb
Public Class Form1
Dim counter As Integer = 0
Dim f2 As Form2 = Nothing
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If f2 Is Nothing Then
'create new instance
f2 = New Form2
'show form
f2.Show()
Else
'show window
'if window is minimized, it will "unminimize" it
'f2.WindowState = FormWindowState.Normal
'bring window into focus
'also brings the window to front
'f2.Activate()
End If
'set value
Dim username As String = String.Format("user{0}", counter)
'set value using method
f2.SetLabelText(username)
counter += 1
End Sub
End Class
Form2.vb
Public Class Form2
Public Sub SetLabelText(ByVal username As String)
Label1.Text = username
Label1.Refresh()
End Sub
End Class
Resources:
How to: Create a Property (Visual Basic)
I need some help to focus a particular control when a TabPage is revisited. I followed many other blogs, but I wasn't able to solve the problem myself.
I created the TabPages inside a MDIForm:
Public Sub Tab_Open(Of T As {Form, New})(name As String, NameofTab As String, Tabnumber As String)
Dim _formByName As New Dictionary(Of String, Form)
Dim Frm As Form = Nothing
If Not _formByName.TryGetValue(name, Frm) OrElse _formByName(name).IsDisposed Then
Frm = New T()
_formByName(name) = Frm
End If
Dim childTab As TabPage = New TabPage With {
.Name = NameofTab & " : " & Tabnumber,
.Text = NameofTab & " : " & Tabnumber,
.Tag = Frm.Name
}
Form1.tabForms.TabPages.Add(childTab)
Frm.TopLevel = False
Frm.FormBorderStyle = FormBorderStyle.None
Frm.Parent = Form1.tabForms.TabPages(Form1.tabForms.TabCount - 1)
Frm.Dock = DockStyle.Fill
Frm.Show()
Form1.tabForms.SelectedTab = childTab
Form1.tabForms.Visible = True
End Sub
Let's assume that in first TabPage the Focus was on a TextBox (with TabIndex = 4), now I may be click on the second TabPage.
After some calculations, when I select the previous TabPage, the Focus should be set to the TextBox with TabIndex = 4 again, but that's not happening.
I tried to create a Dictionary in the MDIForm as:
Public Tab_Last_Focus_info As New Dictionary(Of String, String())
and in SelectedIndexChanged I have this code:
Private Sub tabForms_SelectedIndexChanged(sender As Object, e As EventArgs) Handles tabForms.SelectedIndexChanged
If Tab_Last_Focus_info.ContainsKey(tabForms.SelectedTab.Name) Then
Dim FullTypeName1 As String = String.Format("{0}", Tab_Last_Focus_info.Item(tabForms.SelectedTab.Name))
Dim Indxval As String = String.Format("{1}", Tab_Last_Focus_info.Item(tabForms.SelectedTab.Name))
Dim FullTypeName As String = Application.ProductName & "." & FullTypeName1
Dim FormInstanceType As Type = Type.GetType(FullTypeName, True, True)
Dim frm As Form = CType(Activator.CreateInstance(FormInstanceType), Form)
Dim Focus_on As Integer = Integer.Parse(Indxval)
frm.Controls(Focus_on).Focus()
' Not working too =>
' frm.Controls(Focus_on).Select()
' Invisible or disabled control cannot be activated =>
' ActiveControl = frm.Controls(Focus_on) 'System.ArgumentException:
End If
End Sub
In the Form, which is opened via a Menu, I have this code for the Control that's focused:
Private Sub All_Got_Focus(sender As Object, e As EventArgs) Handles TB_ImageLoc.GotFocus, TB_CompWebsite.GotFocus,
TB_CompPinCD.GotFocus, TB_CompPAN.GotFocus, TB_CompName.GotFocus, TB_CompMobile.GotFocus,
TB_CompMD.GotFocus, TB_CompLL.GotFocus, TB_CompGSTIN.GotFocus, TB_CompFax.GotFocus, TB_CompEmail.GotFocus,
TB_CompCD.GotFocus, TB_CompAreaCity.GotFocus, RTB_CompADD.GotFocus, PB_Logo.GotFocus, DTP_CompEst.GotFocus, DGV_CompList.GotFocus,
CHKB_CompIsRegTrans.GotFocus, CB_CompStateID.GotFocus, CB_CompDistrictID.GotFocus, But_Upd.GotFocus, But_SelectLogo.GotFocus,
But_Search.GotFocus, But_Reset.GotFocus, But_Refresh.GotFocus, But_GridSelect.GotFocus, But_Exit.GotFocus, But_Edit.GotFocus,
But_Del.GotFocus, But_Add.GotFocus
If Form1.Tab_Last_Focus_info.ContainsKey(Form1.tabForms.SelectedTab.Name) Then
Form1.Tab_Last_Focus_info.Remove(Form1.tabForms.SelectedTab.Name)
End If
Form1.Tab_Last_Focus_info.Add(Form1.tabForms.SelectedTab.Name, New String() {Me.Name, Me.ActiveControl.TabIndex})
End Sub
Now in TabIndexChange I'm getting a correct value from the Dictionary, but I'm not able to focus on the required tab.
Kindly help and let me know what I am missing or what need to taken care for this issue or please let me know any other better idea for the same.
First thing, a suggestion: test this code in a clean Project, where you have a MDIParent and one Form with a TabControl with 2 o more TabPages, containing different types of Controls. Test the functionality, then apply to the Project that is meant to use it.
You need to keep track of the selected Control in a TabPage - the current ActiveControl - switch to other TabPages, restore the previous ActiveControl in a TabPage when it's brought to front again.
The procedure is simple, implemented as follows:
To keep track of the current ActiveControl - the Control that has the Focus, you need to know when a Control becomes the ActiveControl. This Control of course must be child of a TabPage.
The ContainerControl class (the class from which Form derives) has a protected virtual method, UpdateDefaultButton(), that's overridden in the Form class. It's used to determine which child Button is activated when a User presses the Enter Key.
This method is called each time a new Control becomes the ActiveControl: overriding it, we can be informed when this happens, so we can check whether the new ActiveControl is one we're interested in, because it's child of a TabPage of our TabControl.
When the new ActiveControl is one we need to keep track of, we can store the reference of this Control and the Index of the TabPage it belongs to in a collection, so we can then use this reference, when the selected TabBage changes, to set it again as the ActiveControl in its TabPage.
Here, to store the state, I'm using a Dictionary(Of Integer, Control), where the Key is the Index of the TabPage and the Value is the reference of its ActiveControl.
When the TabControl.Selected event is raised - after a TabPage has been selected - we can lookup the Dictionary and restore the previous ActiveControl of that TabPage if one was stored.
► Here, BeginInvoke() is used to defer the action of setting the new ActiveControl, because this also causes a call to UpdateDefaultButton() and this method is called before the TabControl.Selected event handler completes.
Public Class SomeMdiChildForm
Private tabPagesActiveControl As New Dictionary(Of Integer, Control)()
' This method is called each time a Control becomes the ActiveControl
Protected Overrides Sub UpdateDefaultButton()
MyBase.UpdateDefaultButton()
If TypeOf ActiveControl.Parent Is TabPage Then
Dim tabPageIdx = CType(CType(ActiveControl.Parent, TabPage).Parent, TabControl).SelectedIndex
If tabPagesActiveControl.Count > 0 AndAlso tabPagesActiveControl.ContainsKey(tabPageIdx) Then
tabPagesActiveControl(tabPageIdx) = ActiveControl
Else
tabPagesActiveControl.Add(tabPageIdx, ActiveControl)
End If
End If
End Sub
Private Sub TabControl1_Selected(sender As Object, e As TabControlEventArgs) Handles TabControl1.Selected
Dim ctrl As Control = Nothing
If tabPagesActiveControl.TryGetValue(e.TabPageIndex, ctrl) Then
BeginInvoke(New Action(Sub() Me.ActiveControl = ctrl))
End If
End Sub
End Class
C# Version:
(assume tabControl1 is the name of the TabControl instance)
public partial class SomeForm : Form
{
private Dictionary<int, Control> tabPagesActiveControl = new Dictionary<int, Control>();
// [...]
// This method is called each time a Control becomes the ActiveControl
protected override void UpdateDefaultButton()
{
base.UpdateDefaultButton();
if (ActiveControl.Parent is TabPage tp) {
var tabPageIdx = (tp.Parent as TabControl).SelectedIndex;
if (tabPagesActiveControl.Count > 0 && tabPagesActiveControl.ContainsKey(tabPageIdx)) {
tabPagesActiveControl[tabPageIdx] = ActiveControl;
}
else {
tabPagesActiveControl.Add(tabPageIdx, ActiveControl);
}
}
}
private void tabControl1_Selected(object sender, TabControlEventArgs e)
{
if (tabPagesActiveControl.TryGetValue(e.TabPageIndex, out Control ctrl)) {
BeginInvoke(new Action(() => ActiveControl = ctrl));
}
}
}
As mentioned previously Tab_Open sub is used to create a form as tab.
In Main form (MDI) created Dictionary as
Public tabPagesActiveControl As New Dictionary(Of String, Integer)
In each form when the control is focused the value has been added to dictionary as
Private Sub DateTimePicker1_Leave(sender As Object, e As EventArgs) Handles RadioButton1.GotFocus,
DateTimePicker1.GotFocus, ComboBox1.GotFocus, CheckBox1.GotFocus, Button1.GotFocus, TextBox3.GotFocus, TextBox4.GotFocus, RichTextBox1.GotFocus
If Form1.tabPagesActiveControl.ContainsKey(Form1.TabControl1.SelectedTab.Name) Then
Form1.tabPagesActiveControl(Form1.TabControl1.SelectedTab.Name) = Me.ActiveControl.TabIndex
Else
Form1.tabPagesActiveControl.Add(Form1.TabControl1.SelectedTab.Name, Me.ActiveControl.TabIndex)
End If
End Sub
And when the tab is focused:
Private Sub TabControl1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles TabControl1.SelectedIndexChanged
If tabPagesActiveControl.ContainsKey(Me.TabControl1.SelectedTab.Name) Then
Dim Indxval As String = String.Format(tabPagesActiveControl.Item(Me.TabControl1.SelectedTab.Name))
SendKeys.Send("{TAB " & Indxval & "}")
End If
End Sub
As mentioned in the comments it has flaws. Kindly please check and help or do let me know what can be tried.
Finally I solved the issue after struggling for 8 Days :)
As I mentioned earlier I Open the forms as tabs using the Sub Tab_Open mentioned in the question.
Defined or created a new dictionary in MDI form as
Public tabPagesActiveControl As New Dictionary(Of String, Control)
and defined a control variable as
Dim Sel_Control As Control
Now in each form when the control is focused I have the below code to assign the current control alone to the dictionary:
Private Sub All_Focus(sender As Object, e As EventArgs) Handles TBox_Reg_website.GotFocus,
TBox_Reg_To.GotFocus, TBox_Reg_State.GotFocus, TBox_Reg_PinCD.GotFocus, TBox_Reg_PAN.GotFocus, TBox_Reg_office_num.GotFocus,
TBox_Reg_mobile_num.GotFocus, TBox_Reg_GSTIN.GotFocus, TBox_Reg_fax_no.GotFocus, TBox_Reg_email.GotFocus, TBox_Reg_country.GotFocus,
TBox_Reg_Company.GotFocus, TBox_Reg_City.GotFocus, TBox_Reg_Add2.GotFocus, TBox_Reg_Add1.GotFocus, TB_Curr_website.GotFocus,
TB_Curr_state.GotFocus, TB_Curr_RegTo.GotFocus, TB_Curr_Pincd.GotFocus, TB_Curr_Pan.GotFocus, TB_Curr_office_num.GotFocus,
TB_Curr_Mobile_num.GotFocus, TB_Curr_Gstin.GotFocus, TB_Curr_fax_no.GotFocus, TB_Curr_email.GotFocus, TB_Curr_country.GotFocus,
TB_Curr_Company.GotFocus, TB_Curr_city.GotFocus, TB_Curr_add2.GotFocus, TB_Curr_add1.GotFocus,
PICBox_Reg_Logo.GotFocus, MSP_Reg.GotFocus, Label9.GotFocus, Label8.GotFocus, Label7.GotFocus, Label6.GotFocus, Label5.GotFocus,
Label4.GotFocus, Label3.GotFocus, Label2.GotFocus, Label15.GotFocus, Label14.GotFocus, Label13.GotFocus, Label12.GotFocus,
Label11.GotFocus, Label10.GotFocus, Label1.GotFocus,
ChkBx_Upd_Logo.GotFocus, Chkbox_NoLogo.GotFocus
If Form1.tabPagesActiveControl.ContainsKey(Form1.TabControl1.SelectedTab.Name) Then
Form1.tabPagesActiveControl.Remove(Form1.TabControl1.SelectedTab.Name)
End If
Form1.tabPagesActiveControl.Add(Form1.TabControl1.SelectedTab.Name, Me.ActiveControl)
End Sub
and in the MDI form when tab select index changes having the below code:
Private Sub TabControl1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles TabControl1.SelectedIndexChanged
If tabPagesActiveControl.ContainsKey(Me.TabControl1.SelectedTab.Name) Then
Sel_Control = tabPagesActiveControl.Item(Me.TabControl1.SelectedTab.Name)
Sel_Control.Focus()
End If
End Sub
Thanks :)
I have created 2 forms.
The first one is the button that you want to back up.
In the second there are paths that can be modified.
How to make a reference that after pressing the "backup" button will get a path of 2 forms.
The path is saved when I closed form2
I know how to do it in one form but unfortunately I can not refer to another form.
Source of Form 2:
Private Sub Browser_from1_Click(sender As Object, e As EventArgs) Handles Browser_from1.Click
Dim FolderBrowserDialog1 As New FolderBrowserDialog
FolderBrowserDialog1.ShowDialog()
TextBox1from.Text = FolderBrowserDialog1.SelectedPath
If Browser_from1.Text <> "" And TextBox1from.Text <> "" Then
Backup.StartCopy.Enabled = True
End If
End Sub
Private Sub Browser_to1_Click(sender As Object, e As EventArgs) Handles Browser_to1.Click
Dim FolderBrowserDialog1 As New FolderBrowserDialog
FolderBrowserDialog1.ShowDialog()
TextBox2to.Text = FolderBrowserDialog1.SelectedPath
If Browser_to1.Text <> "" And TextBox2to.Text <> "" Then
Backup.StartCopy.Enabled = True
End If
End Sub
Private Sub TextBox1from_TextChanged(sender As Object, e As EventArgs) Handles TextBox1from.TextChanged
End Sub
Private Sub save_settings_Click(sender As Object, e As EventArgs) Handles save_settings.Click
My.Settings.pathmem = TextBox2to.Text
My.Settings.pathmem1 = TextBox1from.Text
My.Settings.Save()
End Sub
Private Sub setting_Load(sender As Object, e As EventArgs) Handles MyBase.Load
TextBox1from.Text = My.Settings.pathmem1
TextBox2to.Text = My.Settings.pathmem
End Sub
End Class
You dont want to create a reference to a form - that would (or could) create a whole new form. You want to hold onto the form reference.
This is done by passing a reference to the forms, but the talk of one form fiddling with the controls on another form is a bad idea because it breaks encapsulation. But forms are classes (it says so at the top of each one), so you can add Properties and Methods (Sub and/or Functions) to facilitate passing information back and forth.
Method One - Passing a Form Reference
The simplest way is to pass whatever the other form needs in the constructor:
' form 1 / "main" form / form to return to
Dim frm As New Form6(Me)
frm.Show()
Me.Hide()
In order for this to work, you need to modify the constructor (Sub New) on the destination form:
Private frmReturnTo As Form
Public Sub New(f As Form)
' This call is required by the designer.
InitializeComponent()
frmReturnTo = f
End Sub
It is best not to create your own constructor until you are familiar with them. Use the drop downs at the top of the code window: from the left pick the form name; from the right, select New. The designer adds required code to them which must not be changed.
Do not add any code before the InitializeComponent() call at least until you are familiar with the life cycle of a form. The form and its controls do not exist until that runs.
To return to the "main" form:
If frmReturnTo IsNot Nothing Then
frmReturnTo.Show()
End If
You may want to remove some of the title bar buttons or add code to the form Closing event to handle when the user closes via the system menu or buttons.
Using the constructor is ideal for cases where there is some bit of data which the form must have in order to do its job.
Method Two - Passing Data
Thats all well and good, but what about passing data to another form? You can use the constructor for that too. In order to pass say, a string, integer and a Point:
' destination / second form:
Public Sub New(a As String, b As Int32, c As Point)
' This call is required by the designer.
InitializeComponent()
' Add any initialization after the InitializeComponent() call.
Label1.Text = a
Label2.Text = b.ToString
Label3.Text = c.ToString
End Sub
Call it like this:
' method two: pass data you want to share in the ctor
Dim frm As New frmData("hello", 6, New Point(150, 550))
frm.Show()
Result:
Method Three: Properties
Thats fine, but if there is a lots of data that way can get cumbersome. Plus, you may want to update some of the data from the calling/main form. For this you can create Properties on the form to handle the data:
Public Property Label1Text As String
Get
Return Me.Label1.Text
End Get
Set(value As String)
Me.Label1.Text = value
End Set
End Property
Rather than a private variable to act as the backing field, one of the controls is used. The name leaves a bit to be desired as it exposes implementation details. So, use names which describe what the data represents rather than where it displays.
Public Property SpecialValue As Integer
Get
Return Integer.Parse(Me.Label2.Text)
End Get
Set(value As Integer)
Me.Label2.Text = value.ToString
End Set
End Property
Public Property SomePoint As Point
Get
Dim data = Me.Label3.Text.Split(","c)
Return New Point(Convert.ToInt32(data(0)),
Convert.ToInt32(data(1))
)
End Get
Set(value As Point)
Me.Label3.Text = value.X.ToString & "," & value.Y.ToString
End Set
End Property
A point was used just to show that other data types can be used. Setting those values from the calling/original/source form:
Using frm As New Form6
frm.Label1Text = "Ziggy"
frm.SpecialValue = 42
frm.SomePoint = New Point(111, 222)
frm.ShowDialog()
' do stuff here with any changes
Dim theint = frm.SpecialValue
End Using ' dispose of dialog
The destination controls would well have been TextBoxes for the user to edit. The Property "wrappers" allow you to fetch those values back, so in this case, a Dialog was used.
Method Four: Methods
You can also use methods as a way to pass data to the second/helper form. Here a List(of T) collection will be passed. In the child/display form a method is added to receive the data which it then displays. The task represented is proofing or viewing a filtered list:
Public Sub UpdateDisplay(lst As List(Of SimpleItem), filter As String)
DataGridView1.DataSource = lst
Label1.Text = String.Format("{0} Total {1} Items", lst.Count, filter)
End Sub
In the main/calling form:
' form level variable
Private frmDV As frmDataView
elsewhere...perhaps in a Click event:
' myList is a simple list of items
' Users pick which color to filter on via a combo box
Dim filter As String
If cboListFilter.SelectedItem IsNot Nothing Then
'Dim frmDV As New frmDataView
If frmDV Is Nothing OrElse frmDV.IsDisposed Then
frmDV = New frmDataView
End If
filter = cboListFilter.SelectedItem.ToString()
' apply the filter
Dim tmpList = myList.Where(Function(w) w.Color = filter).ToList()
frmDV.UpdateDisplay(tmpList, filter)
frmDV.Show()
Else
Return
End If
Result:
With DataBased apps a modified version of this can allow for the case where you display DataGridView data in detail form on another form. You need not have the second form rung SQL to add or update the record, and then the main form running another query to "refresh" the display. If the DataSource is a DataTable backed up by a fully configured DataAdapter, pass the DataTable and have the child form add, change or delete using that. The data will automagically be in the DataTable and DataGridView`.
There are other ways to do this, but they generally all boil down to passing something from A to B. Which way is "best" depends on what the app does, the use-case and the nature of the data. There is no one right way or best way.
For instance, Properties and in many cases Functions allow the B Form to close the feedback loop. With DB items, a DataChanged property might tell the calling form that data was added or changed so that form knows to use the DataAdapter to update the db.
'SECOND FORM
Public class secondForm (blah blah)
Public overloads property owner as myMainForm
'Must be only the form you prepared for that
Private sub secondForm_load(blah blah) handles blah blah
Texbox1.text=Owner.customcontrol.text
End sub
End class
'MAIN FORM
public class myMainForm(blah blah)
Private sub button1_click(blah blah) handles blah blah
Dim NewSecondForm as secondForm = New secondForm
NewSecondForm.owner(me)
NewSecondForm.show(me)
NewSecondForm.dispose()
' so you can have bidirectional communication between the two forms and access all the controls and properties from each other
End sub
End Class
In Form4 i have a DataGridView named DbTableDataGridView.
In Form3 there is a set of fields (text boxes) that are all bound to the DbTableBindingSource . When I run application the Form4 shows up. There is a button to open new form (Form3) and in there enter details about customers to be added as new row into database (DataGridView). My code for the "Add" button in Form4 looks like this:
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Me.DbTableDataGridView.Refresh()
Me.DbTableBindingSource.AddNew()
Form3.ShowDialog()
Form3.ImiéTextBox.Text = ""
Form3.NazwiskoTextBox.Text = ""
Form3.Numer_TelefonuTextBox.Text = ""
Form3.Numer_RejestracyjnyTextBox.Text = ""
Form3.MarkaTextBox.Text = ""
Form3.ModelTextBox.Text = ""
Form3.Poj_SilnikaTextBox.Text = ""
Form3.RocznikTextBox.Text = ""
Form3.PaliwoTextBox.Text = ""
Form3.Data_PrzyjeciaDateTimePicker.Value = DateTime.Now
Form3.RichTextBox1.Text = ""
End Sub
It does add new row, selects it and clears entries in the text boxes (that are bound into 'DbTableBindingSource'.
In this form after I fill in all the fields I press button save:
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Try
Me.Validate()
Form4.DbTableBindingSource.EndEdit()
Me.DbTableTableAdapter.Update(CartronicDBDataSet.dbTable)
TableAdapterManager.UpdateAll(CartronicDBDataSet)
DbTableTableAdapter.Fill(Form4.CartronicDBDataSet.dbTable)
MsgBox("Saved")
Catch ex As Exception
MessageBox.Show("Blad zapisu. Sprobuj ponownie. W razie potrzeby zamknij, a nastepnie uruchom ponownie program Cartronic")
End Try
End Sub
It goes to the message "Saved" but actually does not fill in added new recently.
Any thoughts?
There is no link that I can see between Form3 and your data.
I'd recommend passing the newly created data row to a new instance of Form3.
Get the reference to your newly added row
Create a new Form3 (avoid default instance forms, they're ugly and evil). This will mean you don't need to clear the textboxes as you have a brand new form every time.
Pass the datarow into your form where you will bind it directly to the textboxes
Dim newRow = CType(Me.DbTableBindingSource.AddNew(), DataRow)
Using frmEditor As New Form3
frmEditor.DataSource = newRow
frmEditor.ShowDialog()
End Using
In form3 add the property (or preferably a constructor)
Private mDataSource As DataRow
Public Property DataSource As DataRow
Get
Return mDataSource
End Get
Set(value As DataRow)
mDataSource = value
Me.ImiéTextBox.DataBindings.Add("Text", mDataSource, "ImiéFieldName")
' ....
End Set
End Property
If you use this approach then you can get rid of all of the textbox clearing code.
I have done what you have suggested but little bit simpler.
Assigned all text boxes to each cell in current row as follows:
Form4.DbTableDataGridView.CurrentRow.Cells(5).Value = Me.NazwiskoTextBox.Text.ToString
Form4.DbTableDataGridView.CurrentRow.Cells(4).Value = Me.ImiéTextBox.Text.ToString
It works fine.
Cheers
i am working on windows form application.i have two froms
in MDIparant form i opening my two form together like this:
Public Class MDIParent1
Dim frmVE As VisitorInfo
Dim frmVX As VisitorExitsign
Private Sub InvokeToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles InvokeToolStripMenuItem.Click
frmVX = New VisitorExitsign
frmVX.Location = New Point(781, 0)
frmVX.MdiParent = Me
frmVX.Show()
frmVE = New VisitorInfo()
frmVE.Location = New Point(0, 0)
frmVE.MdiParent = Me
frmVE.Show()
now both forms are opend .i have one save button in Visitoinfo form .
also i have textbox in visitorexitsign form.name is txtvisitoridExit
while cliking save button i want to check wethar this textbox(txtvisitoridExit) contains any value,then i have to cal function in the VisitorExitsign form..so i wrote code like this:
Dim forms As FormCollection = Application.OpenForms
For Each form As Form In forms
If form.Name = "VisitorExitsign" Then
Dim vs As String = CType(form, VisitorExitsign).txtvisitoridExit.Text
VisitorExitsign.savebutton()
End If
Next
here am getting valu if vs .but
while going VisitorExitsign page am getting this textbox value (txtvisitoridExit.Text) null.how come that value become null
how i can resolve this issue?
Reason: You are calling a local variable in another scope(VisitorExitSign), this will result a null value.
Solution: Define a Public Static value for what you want to call in another form.
Example:-
In the first form
Public Static Dim textbox1 As String = txtvisitoridExit.Text
In the second from
Dim vs As String = CType(form, VisitorExitsign).txtvisitoridExit.Text
Conclusion: You will get the real value.