I am working at a small VB.NET project which autofill the fields on the Yahoo register page. Is there a way to click on "Check" button and see if the entered ID is OK or not?
Something like if the entered ID is OK then proceed further with filling the field, if not, try another ID and press "Check" button again.
The webbrowser control lets you access elements within the webpage and you can invoke methods on them, so something as simple as this will click the button:
webBrowser1.Document.All("yidHelperBtn").InvokeMember("click");
Add a timer to your application, with an interval of 1000 ms. Here is the code:
Dim CheckButton, yahooId As HtmlElement
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) _
Handles WebBrowser1.DocumentCompleted
yahooId = WebBrowser1.Document.GetElementById("yahooid")
CheckButton = WebBrowser1.Document.GetElementById("yidHelperBtn")
yahooId.InnerText = "testID" 'Replace testID by the ID you want
Timer1.Start() 'Starts the timer: within 1000 ms (1 s). It will execute the Timer1_Tick sub.
End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
CheckButton.Focus() 'Give the check button the focus
SendKeys.Send("{ENTER}") 'Causes the validation of the check button
Timer1.Stop() 'Stops the timer
End Sub
I added a timer because the browser doesn't seem to validate the Enter key while in the WebBrowser1_DocumentCompleted method.
With this code, you can know if the id you entered is OK or not. It is not complete, but it's a good beginning, try to understand and adapt it for your needs.
Related
Probably a simple one but a cannot figure out the correct event:
I have a vb.net WinForm with a TabControl. On every TabPage, the user can enter/modify some data and then (hopefully) save it.
To keep things clean, I want to check, if there is unsaved data, when a user changes tabs (and delete it, if not saved).
I am looking for the best event of the TabCard to do so. There is TabControl1.Selecting, .SelectedIndexChanged and .Selected which look promising but they all fire AFTER the Tab changed.
If the user wants to return to save the data, i need to figure out where he came from and show that TabPage again. Also the event would the fire again - Not practicable.
In Conlusion: I am looking for a TabControl Event, that fires after the user clicked another tabcard but before the card actually changes...
Or a better idea to solve this isse another way.
Use the Selecting event. If you don't want to change the tab page, you can cancel the event.
'Here's an example class with a tabControl
Public Class Form1
'this variable stores the currently selected tab
Private activeTab As TabPage
'this initializes the activeTab variable
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
activeTab = TabControl1.SelectedTab
End Sub
'This checks to see if the tab should change or not
Private Sub TabControl1_Selecting(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TabControlCancelEventArgs) Handles TabControl1.Selecting
If (MessageBox.Show(String.Format("Return to {0} tab?", activeTab.Name), "TabControl", MessageBoxButtons.OKCancel) = Windows.Forms.DialogResult.OK) Then
e.Cancel = True
Else
activeTab = e.TabPage
End If
End Sub
End Class
Public Class Form1
Dim Iclick, submit
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Iclick.InvokeMember("click")
With WebBrowser1.Document
For l_index As Integer = 0 To ListBox1.Items.Count - 1
Dim l_text As String = CStr(ListBox1.Items(l_index))
.All("input").InnerText = l_text
System.Threading.Thread.Sleep(5000)
Next
'.All("input").InnerText = "http://wordpress.com"
End With
submit.InvokeMember("click")
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
WebBrowser1.Navigate("http://whatwpthemeisthat.com")
End Sub
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
Iclick = WebBrowser1.Document.GetElementById("input")
submit = WebBrowser1.Document.GetElementById("check")
End Sub
End Class
This is my code so far I have a ListBox with URLs I want to check using web browser which theme are they running (if they are wordpress) but the program seems to be bugged when I click START it is NOT responding, until the last element. It has to do something with the system.threading.thread.sleep line but I don't know what am I doing wrong? Thanks.
That's excactly what the Thread.Sleep() method is for. It freezes for 5 seconds.
Also you are replacing the input each time the For loop repeats. So it replaces, waits 5 seconds, replaces, waits 5 sec... and so on.
I guess you are trying to click the submit button for each of the elements, but that's not what you are doing. You have to hit the submit button each time the text has changed. However you really can't be sure about the loading time of the page.
I'd suggest you to place the submit-part inside the loop, then wait, then go into the next iteration. Maybe you could even try to run the website multiple times, one for each listbox item and then apply the right text to the controls in the webpage, hit the button and receive your result.
EDIT: Your best bet for the Thread.Sleep() would be creating a new thread in which you place the loop. This thread can be paused for 5 seconds, and your application will still respond. This is how you create one:
Imports System.Threading.Thread
Dim myThread as Thread
'//..........
'//Button1 is clicked ->
myThread = new Thread (AddressOf myLoop)
myThread.start()
'//..........
Private Sub myLoop ()
'// Loop goes here...
'Sleeping here will only affect the thread that runs this sub. Your form will still be available
End Sub
I'm making a desktop application in vb.net. When I click the back button (placed by me) on any form it hides current form and shows previous form but when i go again to the form from which i had hit back button then the focus cue still remains on the back button but I want the focus to be on the first textbox on that form or any specific button on which I want.....How can i achieve this...
I have already used some code to shift focus from one textbox to another when i press enter key...but it doesn't work in the above mentioned case....I'm using vb.net in visual studio 2005...
This is the code i'm using for shifting focus among textboxes
Private Sub party_code_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles party_code.KeyDown
If e.KeyData = Keys.Return Then
party_name.Focus()
End If
End Sub
Can anyone help me on this????
You need to add a handler for either the form's Activated event:
Private Sub Form1_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
party_name.Focus()
End Sub
i have a couple of questions about my basic project
if i have a check box and when its checked, it is going to a text box which is displaying the price, when i uncheck it my price still says in that text box, how can i make it dissapear as i uncheck the box?
Dim total As Double
If rb_s1.Checked = True Then
total += 650.0
txt_1.Text = total
thats my code.
and i have many combo boxes, how can i make them all add up as i check/uncheck them.
I would add this functionality into the CheckBox_Changed event handler. This way you can tell if it is unchecked or checked and add or subtract the value from price.
Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
If CheckBox1.Checked Then
total += 650.00
Else
total -= 650.00
End If
TextBox1.Text = total.ToString()
End Sub
You have to use Checked_Changed event of checkbox.
SHARED void CheckBox1_CheckedChanged(object sender, EventArgs e)
IF ChkBx.Checked = true then
textBox1.text = "1500"
else
textBox1.text = ""
END IF
END SUB
To get your displayed text to change when the state of your checkbox changes, you'll need to handle the CheckedChanged event. In Visual Studio while in Desginer mode for your form/control, you can select the check box control, and then in the Properties window, select the Events tab (the one with the little lightingbolt icon), and double click the CheckChanged event to stub in an event handler method AND attach the event to the handler.
ETA: I re-reading this, I'm not sure how clear I was. When I mentioned stubbing in the event handler and attaching the event to the handler, I meant that going the route of double-clicking the event in the designer will do this for you.
As an aside, it sounds like you want the text to be a sum of only the checked items, so from an architechtueral sense, I would recommend creating a single method to determine the sum, and have all check-box check events invoke that method rather than trying to make the event handler method itself do too much directly (maybe that was already clear to you).
So you might do something like this:
Public Class Form1
Private Sub DisplayTotal()
Dim total As Decimal = 0
If (CheckBox1.Checked) Then
total += Decimal.Parse(txtItem1.Text)
End If
'Add other items
txtTotal.Text = total
End If
End Sub
Private Sub CheckBox1_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles CheckBox1.CheckedChanged
DisplayTotal()
End Sub
Private Sub CheckBox2_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles CheckBox1.CheckedChanged
DisplayTotal()
End Sub
End Class
I can't seem to get input focus on a textbox when a tab page first comes up (I'm using Windows Forms, VB.NET 3.5).
I have a textbox on a panel on a tab page, and I want the focus to be on the textbox when the tab page comes up. I want the user to be able to start typing immediately in the focused textbox without having to click on the textbox. I have tab stops set in the order I want and the textbox is the first tab stop. The tab stops work except that when the tab page comes up the focus is not on the textbox, i.e. the one that's first in the tab order.
In the Enter event handler of the tab page I call the Focus method of the text box, but it returns False and does nothing, no error messages. I know I can access the text box because
at the same point in the code I can set the text of the text box.
If it matters, the layout of the tab page is a little complicated:
frmFoo/TabControl1/TabPageX/Panel1/Panel2/TextBox1
I want to set the focus on TextBox1.
What's the best way to get the focus on the desired textbox?
If setting focus is the best way, why is the textbox.Focus() method failing?
I would assume you are attempting to set focus in the form load event handler? If so, you need to do a Me.Show() to actually create the onscreen controls before focus can be set. Something along the lines of:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.Show()
Application.DoEvents()
TextBox1.Focus()
End Sub
If you don't do the Me.Show(), the form is NOT displayed until the load event is complete.
For the tab control, handle the _SelectedIndexChanged event:
Private Sub TabControl1_SelectedIndexChanged(sender As Object, e As System.EventArgs) _
Handles TabControl1.SelectedIndexChanged
If TabControl1.SelectedTab.Name = "TabPage1" Then
TextBox2.Focus()
End If
If TabControl1.SelectedTab.Name = "TabPage2" Then
TextBox4.Focus()
End If
You will still want to set the initial focus in the load event as shown above if the first field selected is to be the textbox on the tab control.
Try either:
Me.ActiveControl = TextBox1
or
TextBox1.Select()
Do the control.Focus() in the OnShown event. You don't need any of the DoEvents logic which didn't work for me anyway.
You Should Use Selected Event of TabControl
Private Sub TabControl1_Selected(ByVal sender As Object, ByVal e As System.Windows.Forms.TabControlEventArgs) Handles TabControl1.Selected
If e.TabPage.Name = "TabPage1" Then
TextBox1.Select()
End If
End Sub
As I have Checked in Both TabControl.Selected and TabPage.Enter Event can set Select TextBox. I think there is some other elements stealing focus. please varify
Any of the solutions I found online don't solve the problem when the control is on a tab page.
However, this works:
(1) set the TabIndex of the control to 0.
(2) In your code that handles the tabpage event, do the following:
SendKeys.Send("{TAB}")
If SendKeys doesn't seem to be a valid statment, make sure you have the following import at the top of your code file:
Imports System.Windows.Forms
I found that the TabControl gets the focus when the Selected event completes. To make this work I used the Paint event of the TabPage to set the focus of the desired object.
Private Sub TabChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Tab1.Paint, Tab2.Paint, Tab3.Paint
Select Case sender.Name
Case "Tab1"
Textbox1.Focus()
Case "Tab2"
T3extbox2.Focus()
Case "Tab3"
Textbox3.Focus()
End Select
End Sub
Try the Activated event of the form like this:
Private Sub Form2_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
'SendKeys.Send("{TAB}") this line works too
TextBox1.Focus()
End Sub
That is guaranteed to work.
I once had the same problem but i solved it using the Me.activate() function.