I run a thread from my main form that do some stuff i want that each action that the thread do will be written on a lable on the main form. How can i do that? I try to give it a pointer of the form but with no luck since its not allowed by the compiler. here is how i create the thread object in my form:
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I have a Main Module that loads a form. I want to update text on a Label, my code is:
Public mFormSplash As Form = New FormSplash
Sub Main
With mFormSplash[code]....
The code loads the form OK but does not update the Label's text (LabelStatus)I am getting an error Error:
'LabelStatus' is not a member of 'System.Windows.Forms.Form'.
This worked ok on a previous project and I can't work out what is different.
I tried to update the button text on a form from a backgroundworker.do_work event, and it failed, with the usual cross-thread exception message.However, by pure chance, I also tried to update text in a system.windows.form.toolstripstatuslabel also from this backgroundworker.do_work event, and it DOES work. Question: why is this? Is it perhaps because theres some kind of implicit shared behaviour with system.windows.form.toolstripstatuslabel?
View 4 RepliesIm trying to write a program that has a thread and the text of the label should be updated every 100 milliseconds. I have the following code but it doesn't work.
Private Sub ThreadTask()
Dim i As Integer
i = 0
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I get this error message if I run the program:Cross-thread operation not valid: Control 'TimeLabel' accessed from a thread other than the thread it was created on.
I Use a thread to send an email. I need write text in a label to let user know when email was send in a form of budgets.' Option Strict is off Function on class form.
Public Sub ChangeLblText(ByVal msg As String) ' LblIconos.modifiers = public (In form)
lblIconos.Text = msg
End Sub
Declarated class of new thread. (Global declared.)
Public TasksPresu As New TasksClassPresu()
An Icon of Form "Presupuestos" trigger the thread
Dim Thread1 As New System.Threading.Thread(AddressOf TasksPresu.TaskEmail)
Thread1.Start()
Class Trigged thread
[code]....
When run this make an error in this line: lbliconos.text = msg Error: "Illegal operation through threads. It had access to the control "lbliconos" from a thread other than that which was created"
I Use a thread to send an email. I need write text in a label to let user know when email was send in a form of budgets.
' Option Strict is off
Public Sub ChangeLblText(ByVal msg As String) ' LblIconos.modifiers = public (In form)
lblIconos.Text = msg
End Sub
[code]....
I tried Invoke metods, delegate functions and adress of form without work, may be i left something.
Private Sub runExe()
Dim myProcess As New Process()
Dim myProcessStartInfo As New ProcessStartInfo("mkclean", " --optimize """ & txtSrcFile.Text & """ """ & txtSaveFile.Text & """")
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I have a TCP server app that starts 2 threads when the server is activated, I want the threads to add text to the textbox on the main form. Here's is what I have tried [code]I have added MsgBoxes at points so I know the Sub updatetext_ is being called, and the text is being passed, they are also showing that InvokeRequired is always FALSE. In any case the textbox txtMessages is not being updated.
View 11 RepliesI've looked at the on line doc over and over, and I can't seem to figure out why this won't work. This code runs the thread, and the thread seems to execute the code in the 'threadsafe' sub, however neither the progress bar is updated or the button click performed.
Imports System.Threading
Public Class VisNotify
Inherits Form
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I'm not sure exactly how to describe this. In VB6, there was a Timer command. I could create a variable of type Timer and loop until the current value for Timer exceeded the initial plus a given amount of time. This allowed me to update form variables while the timing loop was executing. How can I do something similar in .NET?[code]...
View 5 RepliesI am new to multi-threading in VB.NET and have come across a problem whereby I am wanting to append text to a text box on a form from a service thread running in the background.
The application I am developing is a client/server listener, I have been able to get the client and server PC's to talk with each other (confirmed through MsgBox), however I am now struggling to get the service thread on the server to append the text to the textbox, nothing vissible occurs.
I have a form named testDebug which calls a class (RemoteSupport), this class does all the handshake tasks and updates the textbox with the connection data.[code]...
I have a form that looks like this:and i'm using a backgroundworker to update the components:
Code:
Private Sub btnGO_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGO.Click
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im still stuck and i really to get past this and move onto the rest of my program. I'm trying to update a textbox with new text from another class on another thread. I can get this to work no problem on another thread with the same class, and on the same thread in another class. but not on another thread on another class. my code looks like this, when it is run to produces no errors but does not add the test to the text box, what is wierd is i had made some changes to the program to add multiplelines to consolebox.text and then checked console.text from form2 and it produces the values i added but those arent reflected inside in the consolebox for some reason.
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In my vb.net winform application, on click of start button the label1.text should be "process started" then some filesaving method will run after finish that method the label1.text should change to "file saved".
Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
lblStatus.ForeColor = Color.Red
lblStatus.Text = "Saving to File"
[code]....
the initial status of label "saving to file" is not comingup. after the Trigger method finished, the status of the label is changing to "File saved"
I've been having this problem with my program hanging up sometimes. I tracked the problem down to the following statement:
me.lblPrompt.Text = strInfoToDisplay
So I checked strInfoToDisplay and sure enough it had in there what I thought it would. So then I checked lblPrompt. I'm using the command window and just using? me.lblPrompt.Text to get the system to tell the the value. Well, guess what it does? It hangs up. I haven't been able to get the command window to tell me one time what's going on. However, I know it has to work sometimes becuase the program (from the user standpoint) doesn't always freeze up the way it does when I can't read the prompt.
I have several group boxes on a winform. within each there are several labels.I am accessing the group boxes with no issues but I can't seem to find a way to update the labels within by looping. They have the same name except the last character which is a number 1 - 9. ex. lbl1, lbl2 ... lbl9.I need to update the text of each label in code with text I get from a database ex. lbl1.text = one, lbl2.text = two etc... I want to loop through the labels to assign the text. Getting text from database is no issue what I am not doing properly is getting the labels.
do while QstNum < 10
Dim ln As New Label
ln.Name = "SC_Cat" & QstNum
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I have a Windows Form1 with label and i want to update the Form label text from the class file. I can able to get the Form1 controls from the class file but it is not updating the value in the Form. VB.net
Below is the Form1:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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I have a datagrid, Records_tablesDataGridView. when i enter values into it's two columns and hit enter i want to update a label text to show how many records are in the records_table.I assumed that i would find an event in the datagridview properties that i would be able to use. so far no luck.
View 4 RepliesHow can I replace the text of a label control contained in a formview?[code]...
View 2 RepliesI have a program that runs for some time and I would like to update the user on its progress. The rest of the GUI is updated using Delegates and Invokes and such (Java is Soooo much cleaner in this regard - everything is thread safe!!), but there is no invoke method for the progress bar. How can I use a delegate to update the progress bar when there is no invoke to invoke!!
View 1 RepliesI cant seem to find any link or topic regarding my problem. I have 2 forms in a project, form one has labels and adjacent combobox while the other form (form 2)has textboxes with adjacent combobox. I am supposed to change the text property of the labels using textbox entry from form 2 and add/delete/change combobox contents in fom 1 using entries combobox at form 2.
View 13 RepliesHow do I change the text of a label in a different form when using a thread?[code].....
View 5 RepliesI am new to the forums and just started to learn vb.net. Currently I am making a project that require a lot of text. Since I would need over 20 labels and do not want to hide every single one, is there a way to place text on a specific place on form through coding. Then, I could just make it a sub and easily hide the text and reveal it
View 2 RepliesI want to get label's text on one form from another from,i'm working on visual basic.
label's modifiers propert is public and
lblControl.Text = "1"
another form's code is:
Public frm
As
New
Form1()
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I have question about Label.Text.
When run the code Form1 load together with Form2.On Form2 I have Label1.I need that Label.Text flicker or blinking.
I was using 2 forms, the first one has general data capture and the second one is a calendar form. On Form1 I have mulitple windows controls. A Textb ox and beside a Calendar button. When I click on a Calendar Command button, it should open calendar form and once the user selects the date, the date should be placed in the text box on the form1. Identical to this on Form1 I need multiple textboxes that needs date to be captured.I cannot use a global variable for this as I need to validate mulitple text boxes. To explain this, I have a Transaction Date and Date Received. I need to validate whether Transaction date is prior Date Received or not? I dont want to use several global variables b'coz I might need multiple validations as above. Please help me on this.
View 6 RepliesI have a label. Whenever i change the text, the text allows extends to the right. How do i get it so that the text extends to the left.Right now, the text covers up the control to the right of the label depending upon the lable text. i want to prevent this from happening.
View 8 RepliesI am developing a testing application consisting of 50 multiple choice questions each with 3 radio buttons to select the answer choices for my workplace and I just had a couple of questions concerning storing user input for review and displaying the next and previous questions. First - Would it be more practical to display each new question and the answer choices on a completely new form or in labels and just have the click event procedure of the Next button change the text properties of the labels and display the new text? Second - I want the application to store the user's answer choices so that at the end of the exam they can see how many they missed, which ones they got wrong, and then print the graded result. I have no idea how to store the input for later review and printing. Lastly - I would like the user to be able to mark questions for later review as they are taking the exam. For example, if the user selects an answer that they are not 100% sure of, the can mark a checkbox so that at the end of the exam they can review the answers they were unsure of. I guess I am just looking for some direction in developing this type of application. As of yet I have only done simple projects for school and this to me seems a bit out of my league. I have already designed the user interface and created a TOE chart but I would like some input on how to actually code the application.
View 2 RepliesI have two forms (form1,form2). Now I have button in form1 that executes to display text into label1 at form2. How to call it? Do I need to have module for this?
View 5 RepliesJust a little help needed. How would I print the text to a label instead of the form. And how would I change the font size. Then how do I hide the form?This will then allow just the text to be shown,
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