I have a program which I'm designing to help organize and move some of my music around. I can create a play list and then add music to it, when I do this it copies the mp3 files to a specified folder and also updates a listbox with the content of that folder.
The code works, however when I run it the program locks up until everything has been copied, the listbox goes from blank at the start to suddenly showing the whole list.[code]...
I have a list box where the user can add choices depending on what items they want active in the database but I cannot figure out how loop through this listbox to update the items.
Visual Studio 2010
Dim lstitem As String
For i = 1 To ListBox1.Items.Count()
[Code]....
i successfully load data from database to listbox, what i want to do is to add a record and then directly the listbox will update as well as in the delete.
[Code]...
in the program im trying to make i have a button that when clicked starts a fairly lengthly loop, takes a couple minutes to complete. while this is happening im trying to send the an update of the loops progress to a listbox i have setup. Unfortunately these updates dont make it to the list box until the loop is finished, ive tried this with a few different types (progress bar/ rich text box etc). i cant seem to get any form changes through while the loop is in progress.
Is there some option or event thing i need to specify to be able to make changes to the form while in a loop?
I am not getting any errors. But the update query is not executed as it does not change the database.
Dim cmd3 As New SqlCommand
cmd3.Connection = con
cmd3.CommandType = CommandType.Text
cmd3.CommandText = "SELECT * from table 1 join table 2 WHERE (EXP_RETURN_DATE < GETDATE())"
cmd3.ExecuteNonQuery()
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i'm trying to make a loop with listbox1 that put the listbox1 item1 in textbox1 + listbox2 item1 in textbox2 and exexute the code then repeat for listbox1 item2 in texbox1 ecc...
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Is there a way to change the text of a label using for loop. I mean if i have labels namely "label1", "label2", "label3" and so on. [code]...
View 3 RepliesProtected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim s As New Staff
[Code]....
Basically I am trying to update each record with 2 random numbers each time the button was clicked,my problem now is, the system will update the record but the data was wrong. Example, by right all data should be different (randomly string) but for some row it was updated with same data but in randomly, something row1 row2 row3 has exactly same data for column 1 and 2 then row 3 has distinct data, second time, row1 row2 same data row3 ro4 with different data. It is in random sequence. When I add a MsgBox to do testing in the For loop the data was updated correctly with all different data.
Private Function ColumnEqual(ByVal A As Object, ByVal B As Object) As Boolean
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Just a little frustrated with a simple error in a listbox result on a mobile application.Here is a sample of the results I should be getting:
The inputs are 50mph & 4.5 hours
Hour distance
1 50
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i have a listbox with 30 items. i trying to loop through all items in the listbox 1 by 1 and display each item in a text box using the code below.the problem i am having is when it gets to the last item in the listbox i get an error message.Public Class Form1 Private curNum As Integer
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Timer1.Interval = 10000
Timer1.Start()
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Well, i had a problem that SEEMED to be resolved, this was until today when it suddenly stopped working and started repeating the same item (See below)[code]...
View 8 RepliesI have a datagrid which has a column called "tick". There is a button which will "ticked" all the the records in the datagrid so the user don't need to do it one by one.I have been reading MDSN but I am more confuse that before.my old vb6 code was:
On Error GoTo cmdTickAll_Click_Error
Me.MousePointer = vbHourglass
'Loop Through and Set all Ticks the Not Ticked[code].....
I created a new thread to run with a loop to update a textbox (this is just a demo, in reality this thing would go out to a db every x minutes to request an update). I did this on a timer, but i wanted to try to do it on a different thread.. anyways, this is what I have: (one form, one textbox, and this code...)[code]I'm getting a warning through (the "Thread.CurrentThread.Sleep(2000) part is underlined) which states:"Access of Shared Member, Constent Member, enum Member, or Nested Type through an instance; qualifying expression will not be evaluated".
View 5 RepliesI am working on trying to update a list of items to an Excel spreadsheet. I have created my own custom class called Songs and a List(Of Songs) that I want to update the spreadsheet with. It seems like everything is working -- I have even put in a debug msgbox that displays what Song it is currently on while iterating thru the loop -- but after the code iscomplete, I check the spreadsheet and only the first song in the list gets updated. I'm thinking it must have something to do with either the connection string or the parameters that prevents it from updating any other song records. BTW, there is no errors being tossed so it ats like it everything is being processed, just that the data doesn't change for the update inside the loop. Here is the section of
Private Sub btnProcessList_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcessList.Click
Dim adoConn As New Ole.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;data source='" & _
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I have a listbox with two columns. Each listbox item contains a horizontal stacked panel which in turn contains textblocks.
The listbox is empty, with each listbox item being added by the end-user through a couple of textboxes placed elsewhere. The first column accepts strings, and the second column accepts only percentages.
(I have attached a relevant portion of the event sub where a user is adding new rows.)
Private Sub btnAddItem_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles btnAddSplit.Click
'...
Dim ListBoxItemName As New TextBlock
[Code]....
I would like to be able to check every time the above event is fired that the column of percentages does not exceed 100%. I have a couple of labels below the listbox itself where I would like to show the running total and the remainder.
My questions are:
1) How can I loop through the second column of percentages to show the running total and remainder?
2) Is there something more suitable than a ListBox that could make this easier?
I want to retrieve all the items in a listbox with a For loop. there are only two itemsin the listbox. I'm able to retrieve the first item in the listbox when the counter of the for loop is 0. when it gets to 1 an IndexOutOfRange Exception is generated.
Here is my code.
Dim i As Integer
Dim count As Integer=Me.ListBox1.Items.count
Dim sel As String
For i=0 To count-1
sel=Me.ListBox1.Items.item(i).ToString
MsgBox(sel)
Next i
How to access the text of a List box control in a for or for each loop
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Code:
p = -1
Try
ListBox3.SelectedIndex = p
Catch ex As Exception
ListBox3.SelectedIndex = -1
p = ListBox3.SelectedIndex
End Try
Just cycles through my listbox without exiting the try. It keeps having an error causing the catch again.
I have a quick question...is it possible to make a "for... each" loop that would go through each selected item of a listbox? What I want to do make sure there are no dupe names in the listbox.
View 2 RepliesI am binding my listbox to a dataTable, the reason why i am using a listbox is for multiple selection, the user can select more that 1 item, when the user has selected there items, i need to save them into the db, line after line. heres my code, i cannot get the listbox to display all the selected items in my test page.for now in my test page, i just want to show the selected indexes of the items, and then in my next step i would want to add then indexes to the database, for now i just want to loop and display all the selected indexes.
Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
'1. Create a connection
Dim conn As New MySqlConnection(ConfigurationManager.ConnectionStrings("MyConn").ConnectionString)
Try
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i have a listbox full of items and i want to use a loop to access these items one after the other and then process each one for admission.That is when the item is at memory location 0, it will work on that item and the move to the next at memory location 1 till it gets to the end of all the items in the list box but my loop is not working i have tried different types of techniques but none of them it working these are my codes
Dim i As Integer
Dim count = Me.lstbprocessapplicant.SelectedItems.Count
For i = 0 To count - 1
[code]....
'This one only gave me the indexes?
Using ASP.NET and VB.NET code behind, I have the following code:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim I As Integer = 0
For I = 0 To 10
ListBox1.Items.Add(I)
ListBox1.DataBind()
System.Threading.Thread.Sleep(300)
Next
End Sub
The intended output of the code is to update the listbox1 control at each iteration, but what really happens is it updates the listbox1 control after the entire loop finishes..Is there a way to update the listbox1 control as its intended by the code logic?
I have an array list declared globally as
Dim OnGraph as new ArrayList
I also get these two debug error.
Is there a way to to combine line's 1 and 2? I only want to loop through a list of the selected items in this listbox. This works just fine, I just wondered if there was a collection of selected values returned that I could use to avoid having to do it this way.
For Loop1 = 0 To MyListBox.Items.Count - 1
If MyListBox.Items(Loop1).Selected = True Then
...
End
Next
I have a listbox that contains a bunch of email addresses from a SQL database.I have some code that I use to send an email with some values from my app.How can I loop through my list box and grab the email address to use as my mail.to.add(emailaddress) string I have this and it loops twice because Thats how many addresses I have in my test listbox.
For i = 0 To Me.lstbxEmailListR.Items.Count - 1
Looking for a line of code that I can use to set a string to the listbox text
next
I don't need to use a listbox, But I figured it was easy to use to grab the email addresses from my DB.
remove selected items from a listbox using a for each loop?
View 5 RepliesI have a listbox displaying sql results in a loop. Let's say I want to select one of those results and click a delete button. I have the button and box setup displaying the results just fine, I just do not have the functionality. How would I do that?
View 18 Replieswhat im trying to do is loop threw all listbox items until the listbox item contains say "panda" and stop and give me the index of the item that contains "panda"so i would end up with panda`s selected index
View 6 RepliesI am using a loop to update properties of each object of a set of custom objects. The routine knows which controls to update because the controls value is not empty, I don't want the routine setting the corresponding properties to nothing when the control is empty. Now I know how to do this perfectly fine with IF statements such as:
CODE:
But this feels really redundant doing that same IF block over and over for each property/control combination, I thought about creating a separate routine that takes the control as an argument and does all the repetitive IF blocks but I don't know how I could also pass an object property to tell the routine to update that particular property.