WPF: Change Value Of All Textboxes Nested Inside Expanders In A Stackpanel
May 30, 2012
This is my first time using WPF. It has been a bit of a nightmare, but I've done enough of the project that I now don't want to start all over again with a forms application.
My problem is this: I have 50 textboxes inside an expander, which in turn is inside a stackpanel. I need to store the value of each textbox in an array. In forms I would probably do it something like this (I am using vb.net by the way):
Dim i As Integer
Dim values() as string
For i = 0 To 49
values(i) = form1.Controls("TextBox" & i).text
Next i
(Assuming my textboxes were named Textbox1, Textbox2, Textbox3 etc.)
How can I do this in WPF? I've tried using Trees (I think they're called?) but have failed every time and now given up.
Oh, I also forgot to mention that there are also other controls in the expander (labels that are paired with the textboxes).
I'm new to WPF and a beginner to VB.NET. I try to teach myself and I only post on forums when I've tried and searched threads and come up empty.I'm pretty sure I need to use a For Each loop, and I can do this when moving/deleting etc. files in a directory, but not for going through controls. I can do it "easily" with an If Then statement
I have a DataList inside another DataList. I want to access the child DataList "dlQuestion" events, ItemDataBound event. Also, I'm tring to find the control LableControl "lblQuestion" in the child datalist. How do I do that? Here's the mark-up:
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I am making an invoicing application. I have a label (lblCost) inside of a UserControl (InvoiceEntry) inside of a FlowLayoutPanel (pnlEntries). InvoiceEntry represents a line item on the invoice, and pnlEntries is the "body" of the invoice. pnlEntries can hold several InvoiceEntry controls.
I am attempting to sum all of the lblCost values from each InvoiceEntry control to make a subtotal, and I want that subtotal to change automatically if costs are changed (e.g., a change in quantities being ordered). Is there a way to handle when the lblCost.Text property of any of the InvoiceEntry controls contained within pnlEntries changes?
InvoiceAdd.vb:
' Instantiate objects of the various database interaction classes. Private mCustomer As New Customers Private mItem As New Items
[URL] I'm trying to do an exercise on that website but it doesn't show the answers to the exercises..
I've gotten everything to work except one thing. I can't get the right numbers inside the textboxes! I've been sitting here for like an hour trying to use a case statement.. it didn't work for me so I tried to use if then statements and I still couldn't get it to work!
Here's my code for that part: Ignore the second if I was desperate xD Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
[Code].....
And for the Case statements, if I wanted to use it for a range of numbers, do I write "Case 1 To 10" and that's numbers between 1 and 10? Is that right?
I've got the following issue: I want to make my program change the Backcolor property of all textboxes inside a TabControl. The problem is that one of the Tabs has got another TabControl in it, and I need to change those too.I'd like to to it all at once, but I'm getting an error using this code.
vb.net For Each SpeechTextBox As TextBox In TabControl.Controls SpeechTextBox.BackColor = ColorFondoTablasUSE[code].....
The error I get says this:
System.InvalidCastException was unhandled
Message="Unable to cast object of type 'System.Windows.Forms.TabPage' to type 'System.Windows.Forms.TextBox'."
I read somewhere in the forum how to make this work, but I can't find it.
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Dim s1 As String = "START (random string) FISH bingo CAKES (random string) END"
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So inside of CustomerContacts I have another ObservableCollection of ContactTypes. Here is my current datatemplate: <DataTemplate x:Key="iconTemplate">
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Its pretty much the Child/Parent display problem somewhere discussed in the codebank, but kinda backwards, the thing is that I;m navigating through the CHILD records here, not the parent, yet i have all the data needed in my Dataset.
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1- If the user select decimal i would like to limit the maxlength to 3 on all the 10 textboxes at once versus individually changing each textbox maxlength.
2. If the user select hexadecimal i would like to limit the maxlength to 2 on all the 10 textboxes all at once.
I had problem with one textbox (texbox were third in row but while you used TAB it were as last), so I recreated all buttons in right order, but now it is totally wrong, when I click TAB it goes to first textbox, again TAB and it goes to 7th in ROW !instead to second in row :/ Weird thing is that I created all those textbox in row so 1 text box -> 2nd textbox etc. so I thought TAB will just go in order of creation, but it's not.How can I rearrange order of focus on text boxes while you using TAB ?? All those txt boxes has Tab Index = 23...
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code For Each item As Reflection.FieldInfo In GetType(NameSpace.ClassWithNestedClasses).GetFields rtfAppend(item.Name & ":" & Tab & item.GetValue(Me)) Next For Each item As Reflection.PropertyInfo In GetType(NameSpace.ClassWithNestedClasses).GetProperties()
[code]...
which gets me the simple string vars and properties of my top class, but how can i apply this to loop through all sub classes and get there vars and props?
I am trying to change 2 textboxes so that they show the current list view selection. When I click to change the selection the program crashes. Here is my code:
Private Sub BookmarkListing_ItemSelectionchanged(ByVal sender As Object, ByVal e As System.Windows.Forms.ListViewItemSelectionchangedEventArgs) Handles BookmarkListing.ItemSelectionchanged NameBox.Text = BookmarkListing.SelectedItems(0).Text LocationBox.Text = BookmarkListing.SelectedItems(0).SubItems(1).Text End Sub
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----- ----- | | | | | | | | ----- -----
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Lets see if I can explain-I have a text box (rich text box) in a form. Inside the box, some data gets put in there- specifically insurance information.
Normally, the box doesn't need to change color to alert the user there's a problem with the text that's inside, because the information is usually good.But there are a few phrases that need to alert the user there's a problem.
For example, if the words "Not Found AS OF:" appear anywhere in the box, I need the background to show red.Or, if the words "Letter #1" appear in the box, it needs to show red. Absent of any key words, the box is normal (white).
