VS 2010 - Loop Controls Through Counter?
Jun 5, 2012
I'm trying to load a file where this file has, like, 10 lines. And I want to load each line (0 to 9) to each TextBox in my app (TextBox1 until TextBox10). So, there's a way to do this with a counter?
Like this mine code (that doesn't works):
If (System.IO.File.Exists("configs.ini")) Then
Dim configs As String() = System.IO.File.ReadAllText("configs.ini").Split(vbNewLine)
Const Max As Integer = 9
Dim TextBoxes(Max) As TextBox
For i = 0 To Max
TextBoxes(i + 1).Text = configs(i)
Next
End If
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Mar 19, 2009
i wanted to know how to create a for...loop...and specify the counter for the loop to control the animation time. I want the for..loop to increase the speed of the moving object (button) and move it 5 times...
the code i started with is
Private Sub ForNextButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles xForNextButton.Click
For Counter = 0 To 1000
'do somtething----the something i want to do is repeat the moving process 4 times and at a fast speed---how do i write that
Next
[code]....
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Oct 4, 2011
Basically what I have are two loops, one inside the other, that will run until the given condition is met. Exactly what I want. My problem is that I want to be able to use the controls, like buttons, while a loop is going on.
I originally did not think of this until I had built this part of my program, what I want to know is if there is a way to use controls while a loop is going on or if their is an alternative.
1)I know timers can be used to meet these goals, but they did not work out as I had hoped and using two timers (1 to represent each loop) I do not believe is efficient.
2)I have considered using recursion, but have found this may not be very efficient either and am not quite sure if this will do what I want.
These loops run as long as the number the user inputted. So it could theoretically run for 100,000+ times. I am not looking for speed, but it would be good if there were a faster method that allowed me to use controls while it loops.
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Oct 22, 2010
I want to reset programatically the values of all the labes on my form for example label1.text=1, label2.text=2 etc etc (there are 90 in total)
I came up with:
Dim i As Integer = 0
For Each objcontrol As Control In Me.Controls
If objcontrol.Name = "Label" & i Then
[Code]....
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Jun 6, 2009
I have a sub which requires multiple counter variables. Is there a more efficient way of doing this. My example is simple. Image if I had 20 separate counters I was trying to manage. I would have to create 20 separate variables and then increment each in the desired place in the code.
Dim Counter1 as Double
Dim Counter2 as Double
Dim Counter3 as Double
[Code].....
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Feb 23, 2010
I have a for loop which goes like this -
for i = 0 as integer to 100
result &= "Name" & sqldr("name")
result &= "Lastname" & sqldr("lastname")
result &= "dob" & sqldr("dob")
next
The sqldr is the sql datareader (not important here)
I want my end result to be
Name1 = Sam
Lastname1 = Davis
dob1 = 01/01/1966
Name2 =
...
Name3 =
And so on depending on how manyrecords are in database. How do I make this happen in this for loop?
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Nov 26, 2011
The program is to take an entered string then search for a subset of letters entered through and input box.In my subprocedure Sub btnSearch_Click I am using a loop to move through the entire length of an entered string to search for a set of letters entered through an input box. I can find the set of letters to search for but instead of increasing my counter "Found" for every instance of a match it returns the length of the string instead. I just don't know why the IF doesn't prevent the counter from increasing for every element in the string. I want the counter to increase only when the match is found. I just put 2 message boxes in there to make sure it found the right letter and then display the counter.
Here's the entire
' Name: Count Project
' Purpose: Displays the number of times a sequence of characters
' appears in a string.
[code]....
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Jun 18, 2009
I want to write an Excel macro to set print formats in all worksheets in a workbook. I don't think you can do this by grouping; it appears you have to do it in each individual worksheet. I want to be able to run a macro in any workbook to loop through all worksheets in the workbook and then select the first worksheet.
How do you have the macro determine how many worksheets there are and set the loop counter equal to that number?
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Jan 11, 2010
We have a project that needs to gather survey data. On one particular page of the website, there are 21 questions each with a scale of 1-5 where the user selects one radio button for each question in the table. The survey is being coded in VB.NET. The data submits to an SQL database. All the radio buttons are similarly named, so only the number changes for the question [Code]
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Feb 23, 2011
Im writing a program and its pulling data from a .MDB to put in a .DAT file.
Here is my while loop:
vb
database_connection()
sql = "SELECT * FROM tlalist"
[Code].....
In my database there are currently 6 rows. and only 1 row has the TLA_DAY column equal to 1, but for some reason when I look at the .DAT file it creates it outputs the result twice rather than only once.
Once JTLA_count increments it becomes "2", but the while loop still outputs as if its still equal to "1". Ive used breakpoints and the counter is incrementing fine.
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Nov 11, 2009
I have aspx form with several textboxes.They are populated with values from a table via retrieval of a dataview.If the row count for the dataview is 0, then I'd like to reset the values in all textboxes. How can I loop through all the textboxes and set a default value?I've tried the following, but no sucess.
For Each ctrl As Control In Page.Form.Controls
If TypeOf ctrl Is WebControls.TextBox Then
CType(ctrl, WebControls.TextBox).Text = ""
End If
Next
My first For Loop was using Page.Controls but it returned only 1 count.The textboxes are inside a tabpanel (ajax), so do I have to locate the tabpage and then find all it's controls (for each tabpage)?
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Jan 21, 2011
I am rather irritated at this. I have no clue why looping through controls on a form and in groupboxes leaves out 75% of the controls.
Here's the code I have:
Dim settings As String = ""
Dim gbControl As Control
Dim gbbox As Control
[Code]....
I want to have setting save all settings to an ini file, and not have to reprogram the saving routine when I add a group box or control. At random times, any number of controls can be disabled, checkboxes can be checked and unchecked, radiobuttons can be checked and unchecked. Regardless of the state of the control, I want the control to show up in the loop. But they don't. Only controls that are enabled and only checkboxes that are checked, every other control state is ignored. That's crap, and is definitely not what is needed by any programmer of any type. We're capable of determining if a control is enabled, hidden, checked, visible, and otherwise.
How do I get the controls to be included in the loop regardless of their state?
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Jan 11, 2011
What I have is 10 checkboxes 1 to 10 which all can be one of several options (the options are constant for all the checkboxes) and I need to change a variable according to what the checkbox.text preperty contains.
I plan to use a For to next statement
For i = 0 to 9
If Checkbox(i+1).text = "hello" then
String(i) = "bye"
[Code]....
However I cannot refer to a checkbox in the way i have done above. Essentially how do get what the checkbox contains based on on my counter, i.
Note: it is i+1 because the first check box starts at one yet my counter starts at zero.
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May 20, 2010
I have this code sample from a book I'm reading which looks to be incorrect:
Imports System.Diagnostics
Sub Main
Dim pc As New PerformanceCounter("PerfApp", "Clicks", False) 'excepiton here
pc.Increment()
counterLabel.Content = pc.NextValue().ToString()
End Sub
There excepion message I get is: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly. I looked for a property to see if I can set it but couldn't find one.
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Feb 22, 2012
I've got this code
Public Class Form1
Dim m_listener As HttpListener = Nothing
Dim m_asyncCount As Integer = 0
[code].....
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Jun 8, 2011
I've to show some PowerPacks.RectangleShape in a PowerPacks.ShapeContainer. A loop in my code add shapes to the container
(objshapecontainer.shapes.add(objshape), but at the end of the loop, only the last shape is displayed, in fact objshapecontainer.shapes.count doesn't exceed 1
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Feb 20, 2012
I have the following code to dynamically add handler to my controls
Private Sub HandleMyControls(ByVal Proc As EventHandler)
For Each c As Control In Controls
Select Case IsContainerControl(c)
[Code].....
There are some subs and functions that help me in what to change and where to loop. My problem is that right now, I can set only .enter event of the control I tried to set parameter as Event but i got an error on that. So, what I want to do is something like this:
Private Sub HandleMyControls(Event as ???????, ByVal Proc As EventHandler)
If MatchControl(c) Then
AddHandler c.Event, Proc
End If
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Jun 11, 2009
I'm new to ASP.NET and i would like to ask, How do i loop on each Labal control in the page.
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Sep 8, 2010
How do i loop on each Labal control in the page i tried :
For each lb in Label.Conrols
next
but for no avail
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Feb 24, 2010
Im trying to loop through a collection of controls see code:
Private Sub addZeros()
For Each ctrl As Control In Me.Controls
If TypeOf ctrl Is GroupBox Then
[Code]....
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Jan 2, 2012
I can use the below code snippet to clear the text from each textbox on a form.
For Each ctl As Control In Me.Controls
If TypeOf ctl Is TextBox Then
ctl.Text = ""
End If
Next
But if I want to use it to ensure that all radiobuttons in a group of radio buttons are unchecked then it doesn't work i.e.
For Each ctl As Control In Me.Controls
If TypeOf ctl Is RadioButton Then
ctl.checked = false
End If
Next
I'm assuming it is because the checked property is not common to all controls.
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Aug 23, 2011
I can't use the normal method, my controls (picture boxes) names contain numbers such as 00, 01, 02 etc which corrispond to my multidimenional array.
I'm attempting change the picturebox's values in a for loop via the counter in the loop, for example:
For i = 1 To 4
PictureBox(i).enabled = False 'Picturebox1 will be the first one(counter starts at 1)
Next
I basically need to access each one as I would with an array, I can't type the full names out, can only refer to them via their names + counter number because I don't know what control name I would be dealing with at that time in the loop.
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Mar 1, 2012
What I am trying to do is dynamically create a bunch of dropdown lists and then I want to loop through them and update the database with those values, but the problem I am facing is that I create the dropdown lists, but then when I go back to loop through them they are no longer in the panel. I don't know why but when I am debugging I have a count of 50 controls in pnlTeacherSelect right up until I press the button that calls prcChoose.
[Code]...
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Nov 24, 2009
I'm creating 50 picbox in code. they are named Area1_1 to Area 1_50.
They all have different XY position and different size, setup in % of the form width.
Like this:
Code:
Dim Area1_1 As New PictureBox
' Dim 48 other box...
Dim Area1_50 As New PictureBox
[Code]....
But it don't work. Probably because the controls is not added to the form yet...
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Sep 5, 2008
I want to create a table with 2 fields (FormName, ControlName) that consists of all form names and all control names (within that form).[code]...
How do I loop through all forms and controls in my project?
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Jun 29, 2010
I have the following code:
Dim i As Integer
For i = 1 To 20
Dim captionTextBox As TextBox = DirectCast(Me.FindControl("news_Image" +
[Code].....
Where the comment is in the code above, I need to insert the value of the textbox (text) into Linq columns. For example: articleToUpdate.news_Image1Caption, news_Image2Caption, but I need to change the number after news_ to the value of i in the for loop.
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Jul 12, 2009
How do you add an arbitrary number of controls to a form at run time? With indexed controls I could define the 'seed' control at design time and reference 'clones' of the 'seed' control at run time via the index. Now I must declare each additional instance of the control at run time then set each individual property that differs from the default for that control for each instance. Then I must add the newly declared control to the appropriate container controls collection. I'd like to do this in a loop but how can I get away from using a fixed control name in the declaration:
Dim controlname As New Control
I can't use a string that I can manipulate the contents of for controlname because it sees it as a double declaration. I can't use an array such as Control(index) for controlname. Dim Control(maxindex) As New Control doesn't work. Dim Control(maxindex) As Control works but any assignment based on this such as Control(indexvalue).Name = "ControlName" fails. It didn't address the issue of handling the declaration of new controls in a loop with some kind of variable name for the control.
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Jun 12, 2012
I have a BackgroundWorker and the DoWork event, calls a function called "JustMe", it executes a loop to make visible all the controls on a panel, but does not work vb.net
Private Function JustMe As Boolean For Each ctr As Control In Panel1.Controls ctr.Visible = True Next Return True End Function Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
JustMe()
End Sub
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Aug 14, 2009
I have a bunch of controls loaded into the same row/column in a TableLayoutPanel. I only have one at controls visible property set to TRUE at a given time. I want to be able to loop through the controls that specific row/column position in the TableLayoutPanel and test for a condition (control type) and then set this control's property to TRUE and all others to FALSE. Bascially I am turning controls on/off.
I know can loop through an entire TableLayoutPanel like this:
For each control in TableLAyoutPanel.Controls
Next
How do I restrict this loop to a specific row/column in the TableLayoutPAnel? Can you qualify where specifically you want to look in the container control?
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Mar 2, 2010
I am trying to make a collection of controls that I can loop through. So I have this code in my form... Dim WizardFrameCollection As New Control.ControlCollection(Nothing)
I then try to add controls to the collection by I get a error "Object reference not set to an instance of an object." WizardFrameCollection.Add(Me.GroupBox1) I am not sure why I am getting this error. Groupbox1 is a groupbox that is on the form.
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