.NET WinForm - Tab Sequence And .Enabled Property?
Jan 20, 2009
I have a situation with several TextBox controls on a WinForm. "Rules" are processed on the Leave event of one TextBox (TextBox1) which can disable or enable the very next textbox in the tab sequence. It appears that if the "rule" disables the next textbox, focus remains on the prior textbox. In this case, the focus is in the wrong place AND, if user clicks "{TAB}" again, no events fire for TextBox1. I am looking for a solution that does NOT require hard-coded knowledge of the tab sequence to make tab navigation (and events) work properly. See small code sample below that demonstrates the problem:
private void textBox1_Leave(object sender, EventArgs e)
{
if (textBox1.Text == "bob") // simulating a "rule"
[code].....
The problem was first identified because of rules triggered in a class entity that was "bound" to the form controls, but data binding does not seem important to the symptoms.Is this a quirk/limitation of the WinForm event model?Rhino907
I'm trying to do MVP where I have a view specific model that the presenter manipulates and the view binds to. There is no other connection between the presenter and view (the view fires off commands to the domain model via a gateway type pattern).
As you can guess, this makes the ability to bind to any property of any object really important.
I'm having trouble finding the correct way to bind to the Enabled property of a ToolStripMenuItem. Most controls have a .DataBindings property, but this one seems to lack it. I haven't found much info online about how to do this. Is it even possible?
I have a usercontrol with a picturebox and a few buttons related to it, such as LoadFromFile, Paste and Zoom (that last one pops up a new form). Is there a way to override the basic Enabled property of the usercontrol so that I can keep the Zoom button active all the time, while turning off the other buttons?
I realize there are 2 "obvious" replies. don't do Enabled=False, create a custom method. do everything in the one form, not a usercontrol, so you can pick and choose disabling. Both are less than ideal, given that I'm putting this control into a couple of existing forms, so I'd like to work around how those forms already behave. So is there a way to override the behavior of my usercontrol when it gets disabled? What would be my best strategy?
If a AJAX-Enabled WCF should return an Object with a Date Property which is Nothing a Request to this Service fails.[code]Chrome displays on this call the following error message: "failed to load resource".Has anyone an explanation/idea for this behaviour and how are you supposed to prevent this problem?
As i'm learning more and more about developing ive just got my head around creating classes and modules, i started wondering about something to do with configuration of applications where deployment is in a more diverse environment say in a company where different branches dont need access to all parts of a program, so i thought id throw the question out there in a basic sense and get some feedback. so i can go off and do some more reading and learning.
So the scenario in my head is like this.
So we have for arguments sake FrmConfig which is the master configuration form, then we have FrmMain which is the root menu our application general user interfaces with. So here based on what options are checked as enabled in FrmConfig effects what controls (like buttons/menu options) are enabled in FrmMain.
A Form is to Accept User Name and Password from user, after verification the form should display another form that will accept user's full data. When a user press the Ok button, the information entered on this form should be display in another form (Showing the user what he/she has entered)
i have Design the Firs Form and the second form, how can i pass the information entered on the second form to third, and also what will the code look like I need help on this or Code Sample?
NB: i am trying create an instance of the second form in the third form and declare a variable in the third form that will holed the value, but still not working I want to learn .NET Programming in VC#, ASP.NET And VB.NET. I am student and really get excited when it comes to programming
I'm very dumb in vb.net or any .net languages. Actually while I was creating a package using SQL Server Integration Services, I had a problem. This problem can be solved using VB.net script.
Here is my scenario I've a database table like this ColA ColB ColC
I'm building my first application in VB2010, this application consists of running 3 different programs; one after the other. I use a progress bar for task progress. My question is on how to make the application go to the next program after finishing with the previous one? Here is some of the code:
Private Sub Timer1_Tick_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick ProgressBar1.Increment(1) If ProgressBar1.Value = 3 Then
Im coding a program to grab 3 names and 3 times and display the persons name with the lowest time in the corresponding text box. The program works but only if my values fall within the rules. Im trying to make it so that it displays the correct winner.Quote:
Private Sub btnCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalc.Click 'Calculate who came in first, second and third place
I want to extract numbers from a sequence. Example: if the number is 1890928 i want to extract "1" or "89" or "909". I think it's something with left or center but i don't know how.
I'm very dumb in vb.net or any .net languages. Actually while I was creating a package using SQL Server Integration Services, I had a problem. This problem can be solved using VB.net script. Here is my scenario
New to programming completely,on VB 10 Express. I am in the process of creating a keypad which I can punch in numbers 1- 9 to enter a password. I have 9 buttons for the numbers. I've got the keys to print the numbers into the textbox above but when I press a second key it replaces the first number in the text box.
My question is, how do I make the numbers go in sequence, so instead of (Press 1) - 1 - (Press 2) - 2 - (clears 1)
I want it to go like (Press 1) - 1 - (Press 2) - 12 - and so on...
I have this XML <?xml version="1.0" encoding="utf-8"?> <root> <xsd:schema id="root" xmlns="" xmlns:xsd="[URL]" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata"> <xsd:import namespace="[URL]" /> <xsd:element name="root" msdata:IsDataSet="true"> [Code] .....
And I also have this method, where I take two files and take some values from them, and then I merge all the values into an object in the second query: Public Shared Function RetrieveTranslation(ByVal filefrom As String, ByVal fileto As String) As List(Of clsTranslation) Dim valuefrom = (From l In XElement.Load(fileto).Elements("data") Select l.Element("value").Value).FirstOrDefault [Code] .....
So, the problem is that when I run the code, there is an "Sequence contains no elements" error in the first query(valuefrom). I debugged and it says that there is nothing in the query, but I don't understand why? I'm curious to know if it is well done to do something like I did, create an object from two queries, putting the first value in the second query.
While going thru an msdn article, I found a reference to System.Query.Sequence class. But when I try to use it, I get error "Query is not a member of System"
vb.net Public Sub Linq65() Dim numbers = From n In System.Query.Sequence.Range(100, 50) _ Select New With {.Number = n, .OddEven = If(n Mod 2 = 1, "odd", "even")} For Each n In numbers
[Code]...
The above code is vb.net version of this code from msdn. So what is the correct namespace of this class? Or I'm missing something else?
I have 6 textboxes (named textbox7, 2, 3 , 5 and 6) and i want to switch the values put in them (7 in 6, 6 in 5, 5 in 4, 4 in 3, 3 in 2, 2 in 7) by clicking a button.Actually this should be a volley formation scheme :Pi wrote this
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click TextBox7.Text = Replace(TextBox7.Text, TextBox7.Text, TextBox2.Text)
i have a file with a serial number in it and i need to check if it is in sequence or not and then print a report stating no errors or if there is errors what line they are on.
From my Windows Service I am passing a well-formed XML string to a Java Web Service. The Java Web Service will process the data and return me a status code. Though I am passing a well formatted XML file. I am getting an error from the Java Web Service of:
I am creating a program which needs to read a regularly updated online XML file. I am using the XDocument type to do this and currently need to read each row and its attributes' values from XMLs like this one:
My first thought was to use a statement similar to this but apparently it is invalid: For Each d...<rowset>.<row> In d...<rowset> The reason that this code fails is that it never even enters the for loop, although I'm sure the if block code is wrong too which is why I put a comment there, but my main issue is making the loop work for reading each row in order.
I have a combo box with four option and two textboxes (on forms load the first textbox is enabled and the second is not). When I click on a spesific option from the combo box I want to make the second textbox enabled.
Im Making A Tic Tac Toe And I wanted to add color to the buttons and when someone wins one of the buttons is always not enabled and i've looked through the code and i cant figure out what is wrong.
I'm making a Windows Forms Application and in it I've placed a WebBrowser. When I try going to my homepage though, it says that JavaScript is not enabled. My question is, is it possible to import JavaScript? If so, how can I go about doing so?
