Fairly new to VB express.
Is it possible to have a button click event from within a for each loop on a form i.e. the button being clicked refreshes the form and moves on to the next iteration of the loop?
Any suggestions welcomed.
yes you can but can you explain a bit more and perhaps some code you have?
to click a button programmatically you can do a button.PerformClick()
I am trying to create a form to add a row to a database in this row there are seven fields which id linked to another table. I wanted to create a combo box from which you can choose the item for each of these seven fields one after another from the one instance of the combo box and click a button to move onto the next rather than have seven combo boxes all displaying the same data.
May not be the best way to achieve the object but an interest in learning ways of doing things.
So to answer my question in basic terms if we look at
Dim
myOtherArray() As String = {"Bob", "Beth", "Conrad", "Grant"}Dim i As Integer = 0For i = 0 To 3Label1.Text = myOtherArray(i)
MessageBox.Show(myOtherArray(i))
NextThis will update Label1 on the main form each time the messagebox button is clicked
I wish to acheive the same effect on the main form by clicking the button on it rather than use the messagebox show button
just a suggestion, why don't you use a datagridview? with the datagridview you can add/delete/edit records, can bind to a dataset datasource and can automatically commit changes to a dataset, then you can use the dataAdapter to update the database.
The answer to that one is it is not simplistic enough for the type of users I envisage.
I have experimented with both datagrid and details view and I am not satisfied with either for this particular case mainly because of the additional amount of related data that needs to be shown for each field it becomes confusing.
However if a button click cannot be called from within a loop I will need to think again and maybe use 7 identical forms to do the same thing.
you can do a button click event (simulate a press of a button by mouse) - is this not what you are after? I posted the code in my previous post.
So are you wanting to press the same button everytime? or some other button?
Same button for each iteration through the loop
The form would have some text integrating labels a combo box with related data in labels and one button to confirm the entry and move on to the next step on the same form.
I hope this helps or sheds some light:
Dim myOtherArray() As String = {"Bob", "Beth", "Conrad", "Grant"}
Dim i As Integer = 0
For i = 0 To 3
Label1.Text = myOtherArray(i)
'MessageBox.Show(myOtherArray(i))
Me.someButton.PerformClick() 'this will click the button specified, replace "someButton" with the name of the button you want to click
Next
is this what you are after? my apologies for being slow!
is this what you are after? my apologies for being slow
No apologies needed it is so kind of you to support us newbies and probably answer the same questions over and over.
I did do a lot of research before posting a question and maybe what I want to do is not possible.
Unfortunately the Me.someButton.PerformClick() is the opposite to what I need
In simple language I would say I want to pause the loop and wait for the button click event by the user which will then continue the loop.
ok, lets give it a shot.
At the top of your class, declare a variable:
..
..
public class MyClass
Dim thePosition as Integer = 0 'this is your global variable
'Declare your "myOtherArray" here also, so you can access it through out the class
Dim myOtherArray() as String = {"Bob", "Beth", "Conrad", "Grant"}
'methods start here
now this is the confusing part - still a bit blurry at this part. Now, do you want to just show the "myOtherArray" to the user, then wait for the user to click the button, which would then show the next item in the array? if so, then try this:
if Me.thePosition < myOtherArray.Length - 1 'check to see we have not exceeded the position in the array, otherwise an error will happen
Label1.Text = myOtherArray(Me.thePosition) 'Set the label to show the element in the array, from the last position set
MessageBox.Show(myOtherArray(Me.thePosition)) 'show it to the user, or you could just do MessageBox.Show(Label1.Text)
Me.thePosition = Me.thePosition + 1 'set the position ahead
end if
Does this help/make some sense? I'm probably confusing myself with some things...so please do correct me
Not exactly what I was wanting but it does give me enough to investigate further and it appears to be the answer I have been looking for.
Many thanks for your help and I will report back how I get on.
I have to go out now which is a drag when one is in the middle of something exciting.
Have a good day and thanks again.
Right I have achieved what I asked for all be it in a different fashion, the solution does what I was asking for.
The code is as you said works well
Public
Class Form1Dim myOtherArray() As String = {"Bob", "Beth", "Conrad", "Grant"}Dim thePlace As Integer = 0 'this is your global variablePrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickIf Me.thePlace < myOtherArray.Length ThenLabel1.Text = myOtherArray(thePlace)Me.thePlace = Me.thePlace + 1End IfEnd Sub
End
ClassWithin your answer you have also explained the use of global variables within a class to me which I was fuzzy on.
Now the fun comes expanding this simple example to complete my objective.
I must thank you once again for your time and expertise as well as being so understanding.
Note for other readers all though this does not break/wait from within a loop for a button click, it creates it's own loop by iterating through the possible values of "thePlace" variable.
