Progress Bar / Updating TextBox During Event
Apr 26, 2010
I am writing my first app in VBEE and require your expert assistance.Once a button is clicked in my app, a number of queries in Access 2007 are run. I would like to display the progress of these queries and send text to a text box informing the user of the progress, i.e.[code]I have entered the Text I want to display but it does not update it as it progresses through the code, instead it updates all of the text at the end, once all of the queries have been run.I would also like a progress bar to display the progress of the queries [code]
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Oct 4, 2011
I'm using VS2010 (VB), Framework 4.0 and although I'm incrementing my progress bar value between steps, the progress bar only shows the initial value. I've set the minimum and maximum properties and the initial value, but no luck. Here's a brief summary:
[Code]...
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Dec 6, 2010
I have been reading examples of using a progress bar with a background worker. All of the examples utilize a loop which is the easiest example of a progress bar. However there is the part of my code where I would like to use a background worker and progress bar. This part takes some time, thats why I want to use it. Basically its part of a DB front end where I am clearing oput 2 tables, getting data from another DB and populating the first 2 tables with the data from the first. Below is my code. How would I update a progress bar without a loop
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Jul 29, 2010
I have recently seperated some code from my original Project and I have created a class library which is where my function resides.
originally my function was stored in my win form project and I could call this when needed and increment the progress bar for example
do
processing code
progressbar.value = x
loop until x > y
how do i do the same if my code resides in a seperate project (class library) ?
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Dec 2, 2011
I have two forms:frmMain - Allows user to pick process or combination of processes they want to runfrmProcess - Shows progress of their selectionI have three modules. Each runs a specific process.The frmMain allows the user to run any one of the three modules individually or all together in a single process (basically, runs the one after the other until done).
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Mar 30, 2009
I have a MainForm that loads a number of files and SplashScreen that is shown while the loading takes place. SplashScreen contains SplashProgressBar that I want to update as loading of the files in the MainForm goes on. I declared SplashProgressBar Public in the SplashScreen and coded a mutator for ProgressBar:
[Code]...
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Mar 1, 2012
Here is my
frmMain.tsProgressBar.Value = 0
frmMain.tsProgressBar.Maximum = 100
Do While byteCount > 0
EncryptCryptoStream.Write(buffer, 0, byteCount)
[Code]...
For some reason, the code to update my progress bar is not working. I uncommented the Msgbox line, and a message is only displayed at 100%. Why is this?
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Jun 3, 2010
This is starting to drive me nuts. I'm executing a DTS package from a worker thread that is calling an EventListener class to update the background worker ProgressChanged sub. As instructed, the ProgressChanged method is trying to update a progress bar to avoid thread issues but it is not working. I know the EventListener is throwing events because if I put a message box in ProgressChanged I get the package progress %. Why can't it update the progress bar?
[Code]...
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Jun 19, 2011
I have a progressbar which receives the amount of Sub directorys within a main directory as a Maximum value and when i run the program It goes through the directorys to grab all the files within the subdirectory.
This is the code below which is updating the progressbar.Foldercount is an incrementer which increments by one for each folder it enters.
Dim percentage As Double = folderCount * 100 cirFolderCount.Maximum
cirFolderCount.Text = percentage.ToString
cirFolderCount.Value = Convert.ToInt32(percentage)
On the test directory which has 4 sub directorys I get a maxvalue of 4 and the min value is set to 0 The code above returns the value of 25.0 when entering the first folder which is correct (25% of 4 is 1),But the progressbar does not fill 25% of bar once this folder is processed.
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Aug 20, 2009
My form has FOUR comboboxes populated from text files. The text files are loaded into an array into their own background process once completed are added to the combox. Due to the sheer amount of items the loading causes a lag and as the combobox are on the main GUI thread a glitch appear for several seconds. I then had an idea of loading the initial form, showing another form which is made the topmost form with a progress bar (values derived from the count of items in the arrays populated from the text files).
When I added the progress bar any other label or image on the SAME form did not show until the progress bar had completed, how can I resolve this? When I use it in conjunction with the other form i.e. using the form with the progress bar to populate the other in the background graphical glitches appear (mad transparency effect). I have the code from the form with the progress bar below:-
'Load City information
'*********************
'Set form title
Me.Text = " Application loading city lookup information ...."
'Declare string array to store list of towns
Dim citylookup() As String
[Code] .....
Why I experience the glitch (assume it's because of refreshing the item, some kind of repaint needed)? Any alternative solution to prevent the user from using the form until all the comboboxes are populated?
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Feb 12, 2010
I have the following function
Private Function GetMD5(ByVal file As String) As String
Dim md5 As MD5CryptoServiceProvider = New MD5CryptoServiceProvider
Dim f As FileStream = New FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read, 8192)
md5.ComputeHash(f)
[code]....
It works fine, but when working with very large files on the network my users sometimes panic.I'd like to add a progress bar that updates based on the progress of the hashing through the file.So, my choice are either to manually create the hashing process, which I believe will be much slower,or somehow tap in to the position value of the filestream and use that to update a progress bar.I'd be happy to tap into the events of the MD5CryptoServiceProvider if I could, but I don't see anything there.I have searched the net to try to find an example and have only found code that works by reading line by line from the filestream, not from it being passed to another control/service.
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Jun 29, 2011
I guess that I should preface this by saying that I am totally new to VB, but I come from the PHP/MySQL world so I can work my way through things syntactically. That being said, I have made a program that expedites a few things that I do on a routine basis at my place of work. However, because I have no idea what I'm really doing, my app logs up while the UI thread does all the background work.
What I am trying to accomplish, is a few things. Have multiple functions/subs [done]Somehow generate a generic method that executes a sub when called (one at a time, always)My already coded subs return values (for updating a progress bar for example) but have the background thread that spawns the function, update my UI threads progress bar / list box with the output.I guess I want to know if this is even doable, and secondarily, how would I go about doing this? I understand the idea of threading, but all of the tutorials that I have seen / read are pretty convoluted.
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Dec 10, 2011
I am currently trying to develop an application which will backup large folders to a specified destination. To find all the files in the specified 'backup' directory I am using the following code.
[Code]...
I have tried putting my GetFilesRecursive function into a separate background worker to run first so I can update the GUI however I am struggling on how to return the List of found files back to my application (I get cross-threading exception) and how to update the progress bar to show the progress of the GetFileRecursive function so the user knows it is processing the list of files and has not crashed/frozen.
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Feb 20, 2009
How would you get a progress bar to show the % of the loaded percent. Like if ur uploading a file, it shows the % its uploaded?
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Jun 21, 2010
I'm trying to display the total extraction progress of a zip file as below. This gives me the total file size of all uncompressed files in the zip:
For Each backup In zip
TotalSize = backup.UncompressedSize + TotalSize
Next
I'm then using this to get the current bytes transfered:
TranferTotal = e.BytesTransferred + TranferTotal
The problem is this value resets after each file is extracted from the zip. I was expecting the above to "tally up" the total so I could use it for the progress bar but it seems to still reset after each item? Also, I'm using a global varible for the transfer total, if there a better method to transfer this information to the StepEntryProgress? The reason I'm doing this is because the DotNetZip Library does not support multiple extraction in this way, so I need to tally up in this way.
Code:
Imports Ionic.Zip
Imports System.Threading
Imports System.ComponentModel
Public Class Form1
Dim TotalSize = 0
[Code] .....
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Jan 13, 2010
I want to use a Progress Bar with a Timer inside a BttonClick event.
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Nov 18, 2011
What im trying to accomplish is to try to edit a gridview by using the updating event but not sure how to do this. The way im populating the datagrid is putting it into a dataSet and using that as the dataSource and doing a databind. Here is my datagrid below.
[Code]...
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Apr 15, 2012
The following code runs successfully with no errors, but I still don't get the new data from the grid, by adding a break point, and stepping forward, the data in the variables are the original data, not the updated data.
Private Sub grvSample_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles grvSample.RowUpdating
Dim row As GridViewRow = DirectCast(grvSample.Rows(e.RowIndex), GridViewRow)
Dim passportNumber As TextBox = DirectCast(row.FindControl("txtNumber"), TextBox)
Dim expiry As TextBox = DirectCast(row.FindControl("txtExpiry"), TextBox)
[Code] .....
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Jan 11, 2010
I'm struggling to get a label or any item updated during an event handler I've tried Form.refresh/update, application.doevent, trowing laptop out of window, etc...
If i check for TextChange event on the label and return the value in a msgbox it is set however nothing is shown on the form I'm calling COM's in a backgroundWorker so the form stays responsive as the COMS take quite a bit of time to handle certain parts and I dont want the form to look as if it hangs.
Private Sub cmsCon_Change(ByVal iState As ACSCN.LoginState) Handles cmsCon.NotifyProgress is where the update occurs in the handler by calling the UpdateStatus() Method
Here is the
Imports System.ComponentModel
Public Class Avaya
'declaration
[Code].....
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Aug 16, 2010
In VB6 we had a code inside textBox_MouseUp to call textBox_KeyUp(-1, 0) and the signature of KeyUp was
Private Sub textBox_KeyUp(ByRef KeyCode As Short, ByRef Shift As Short) Handles textBox.KeyUp
Now when I migrate to .NET I changed the KeyUp event to Private Sub textBox_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles textBox.KeyUp
How can I do this call textBox_KeyUp(-1,0) now from textBox_MouseUp event?
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Sep 24, 2010
I'm having an issue where my main form isn't updating even though I see the event fire off. Let me explain the situation and share some of my code which I'm sure will be horrible since I'm an amateur. I created a class to take in the settings for running a process in the background. I add some custom events in that class so I could use that in my form instead of a timer.
[Code]...
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Jan 8, 2011
I have a module that handles adding controls and populating values on a form. One of the controls is a button (there can be many) which acts as a lookup. For some reason, when I click the Button, it winds up in the btnLookup_Click event and displays the various messages, but it does not update the label (labLookup) text on the form. Am I missing something?
[Code]...
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Nov 3, 2009
My current problem, as stated in the title, is that I am trying to create a series of buttons from a custom class within app_code and place them on a master page. The whole reason for this is I do not want to have to copy and paste event handlers on the content pages.
However, upon the click of these buttons I need for a method on the content page to be called and update html within a div of the content page.Is there any way to accomplish updating the div of the content page from an event handler in the custom class? Remember, the method that updates the div exists on the content page.
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Nov 23, 2010
I'm trying to update a text field... in this manner:The main form (where I have the design)
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Oct 17, 2011
I have a progress bar for each function, but I would like a textbox to show the user what stage of the update they are on. The textbox becomes visible but the text does not display the text.
Private Sub btnUpdateAll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdateAll.Click
txtUpdating.Visible = True
txtUpdating.Text = "Updating ALPS Data..."
UpdateALPS_Data()
[Code] .....
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Aug 20, 2010
i try to create a windows form that act something smilar to a cash machine i managed to enter a mount with my first button then my second button is for withdrawing money it checks the amount in the text amount if it is higher than the amount the small dat hold in the amount it will throw an error message if it is less or equal it write the amount in the text box my goal is to deduct that amount in the textbox amount from the amount already at the database.[code]
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Feb 7, 2010
I have been trying to update a textbox on the main form of my program using a different thread, however the changes are not relected in the textbox.I am using MS Dev studio 2010 beta 2.0 .NET 4.0. Here's my code....
The main form
Code:
Public Class frmMain
Private Engine As New clsEngine
Private txtMessage As String
[Code]...
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Dec 13, 2011
how can I detect if press Enter in the Textbox Change event and not in Textbox Keypress?
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Nov 23, 2010
I'm trying to update a text field... in this manner:The main form (where I have the design):
Code:
Public Class Form1
Public Sub ChangeTextBox(ByVal vVal As String)
TextBox1.Text = TextBox1.Text & vVal
[code].....
First I click on the button to open the port. Then I do this code so whenever I receive data from a serial port connection, "Hello" string is written in the text field.. I debugged it, made sure COM Port is open, and data seems to pass to the textbox.. because when I put my mouse over to display the values inside the textbox it shows that "Hello" is stored.. and I tried doing the textbox1.refresh() but still nothing happens.. the textbox remains empty!
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Apr 19, 2010
I have a windows form which contains a textbox.I have a loop in my code doing some farly intensive work. In the middle of the loop I want to update my text box.text property on the form to let my users see some simple progress.
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