I have created an application which creates multiple webbrowser controls at runtime...now i want to clean up memory when these webrowsers are deleted see the code how can i do it(i have tried dispose method but no luck)
Creation on dynamic web browsers on button click
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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I have the following method for looping through a table, changint some values in every row and saving the chages back to the database. To make things go faster I am fetching data in sets of 10,000 rows. This is a large table with over 25 million records in it.
The problem is that my application doesn't seems to be releasing any memory. I have tried redeclaring the records variable to nothing or explicitly caling the garbage collector but the memory stays there.Runnning the built-in VS10 profiler I can see that the culprit is the system.linq.enumerable.tolist() method which takes up over 98% of my memory. How do I release that memory after the call to saveChanges?
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I'm developing an app which creates like 30 labels at runtime.The problem is that with the click of a button, I need to destroy those created labels.[code]...
View 17 RepliesSite is located at [URL] and the section in question is the "configurator" button on my top row navigation. Everything is written in the latest flavor of VB.NET and ASP 3.5, and I have a SQL2005 server available with my host. Here is the down 'n dirty of my dilemma:
During pageload, I get a list of all the parts in my parts table. Then I create an image object and 2 label objects per entry and place them in my fancy accordion pane control. Works great so far, I can get a giant list of pictures and text that's aligned how I like it (for now). Now - I really need a way to be able to have a visitor drag an image/label/label combo from the accordion over to a panel (or anything really) on the right side that is currently invisible. Once the dragged thing is dropped into the drop target, I would like it to fire a function or sub that I write in VB.
From what I've seen about jquery, apparently there is a way to make an element on my webpage draggable, droppable, or what have you. The example code for it - I'm not entirely understanding so a quickie sample would be great. I'm a fast learner and can apply it from there to my project. More importantly, how do I get objects that are created during runtime to be draggable, and fire my event that I wrote in the only language that I know?
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I have written a code to generate numerous command button during runtime depend on the user selection. I would like to find out how do we handle the command button click event?
View 4 RepliesI have a nested content page within a master page, upon load the the page retrieves from a SQL a list of controls to create (Field Type, FieldName) i.e. String, Username.The function loops around the list creating the controls on the webform in a Placeholder, this part works perfectly. The problem that I am experiencing is the request to obtain the value entered by the user in the dynamically created control, I need to perform this call following postback/callback.
If I take the Content page and make it a standard aspx page with no master page the application works fine. Unfortunatley taking the page out of the master page is not an option (unfortunatley a restriction by my client)
how to change the properties of control which are created at run time. The actual situation goes like this: I will be creating 4 picture boxes at runtime and assigning pictures to them. Now if i wanted to change those pictures, i am not getting how to call those picture boxes.
View 6 Replies1. i added a datagrid at runtime on a form. i want to bind a datasource to the datagrid in a button's click event handler, but the datagrid doesn't seem to be visible anywhere else outside the form load event where it is declared. how can i find the datagrid control?
2. and another beginner question.. how to i declare a string that spans multipe lines? i tried with the + operator like in c#, but it doesn't work.
I have a rather large unilingual application that I have to make multilingual, meaning no resource file. I don't have the option of using the culture information but need to do it more on the fly at runtime so that the user can change languages either on startup or menu pick while in the application. I can handle that part ok.
View 2 RepliesIs there a way in vb.net to check whether new memory pages have been created inside a process(such as winlogon, svchost etc) For eg : if i there is a certain value that may change if new memory pages are created inside the process. Then i can compare the previous value and the new value (after pages have been created) and make it sure that new pages have been created inside that process.
View 3 RepliesIs there a way to check whether new memory threads have been created inside a process in vb.net. By hashing the process and checking before and after the threads are created or something like that.
View 11 RepliesIs there a way in vb.net to check whether new memory pages have been created inside a process(such as winlogon, svchost etc)
For eg : if i there is a certain value that may change if new memory pages are created inside the process. Then i can compare the previous value and the new value (after pages have been created) and make it sure that new pages have been created inside that process.
i have created dynamic buttons at runtime and i would like to disable them when a user clicks on a form button.This is the code i have for that button:
Dim intXX As Integer = 0
Do Until intXX = intX
userAvatar(intXX).Enabled = False
intXX = intXX + 1
Loop
The buttonNames is an array of all populated button names created at runtime. However, trying the .enabled = false at the end of that does not work. What other ways are there to do that with buttons created at runtime?
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I'm trying to develop a program that turns matrices into their reduced Echlon forms. The user specifies the number of Columns & Rows for the matrix, which is generated by the following Sub Routine
Private Sub ButCreate_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles ButCreate.Click
'Columns and Rows are specified by the user
rows = TxtRows.Text
columns = TxtColumns.Text
'clears all of the controls(text boxes) from the TableLayoutContainer
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How to do is access/manipulate those newly created textBoxes. After the user enters values to those boxes, I want to assign each of their columns to an array.
I am using the follwoing code to generate Menustrip at runtime.
Dim dgv1 As DataGridView
dgv1 = Me.MenuDataGridView
ReadMenuInGridView(dgv1)
Dim MItems As New SortedList(Of String, ToolStripMenuItem)
For Each dgr As DataGridViewRow In dgv1.Rows
[Code] .....
Where the sub "ReadMenuInGridView" passes the DGV by reference and populates it with the menu item from the database. My question is,, the program as it is in the form listed above works fine (where I have a DGV "MenuDataGridView" created at design time), however, if I want to make it 100% dynamic and use a DGV created at run time I will not get the menu? Actually the program will not get in to the For loop?
Simply to do that we can replace the first 2 statement with:
Dim dgv1 As New DataGridView
'dgv1 = Me.MenuDataGridView
global variable can be created during runtime?
View 1 Repliesi just made an form where with button add 10 textbox whith this code:
For X = 1 To 10
Me.Controls.Add(tx)
tx.Visible = True
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now i want write somethings in textbox (i.e. textbox1.value="hello") but no find way, because in code is not defined textbox1, create at runtime (of course).
I have a form on which I want to place labels created by code executed by clicking a button(cmdAddLabel) at run time. I subsequently want to move the newly created labels around on the form. The following code sucessfully creates the labels at run time whenever the cmdAddLabel button is clicked:
Private
Sub cmdAddLabel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAddLabel.Click
Dim
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Been searching a trying examples for a couple of days and always fall back to the "null reference" error on this one. I have a set of instructions coming from a SQL database and the number of instructions is a variable. Therefore, I have a TabControl which I add TabPages to at RunTime depending on the number of instructions there are. The TabPages are then created with the names; Step1, Step2, Step3, etc.Each TabPage is made with the same controls and all of the controls are named the same from page to page (e.g. "instr" is the name of a TextBox control that exists on every TabPage).I can successfully create a GetControl method that will return the correct TabPage, but I cannot reference any controls on that TabPage.I can only change properties of the TabPage.If I try to reference a specific control on that TabPage, like the "instr" TextBox control, I get the null reference error.[code]
View 9 RepliesMy
Public Class Form1
Dim x As Integer = 0
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As you can see, i can retrieve the tag of the button (which is created at runtime) without any problems, i've made a temporary msgbox to show me the value of the tag, just for testing purposes. What i do have a problem with, is retrieving the tag of the individual web browsers, how should i do this?
Next issue, how would i code for my buttons to show the web browser with the same tag as the button that's just been clicked?
I have successfully randomized certain pictureboxes in a grid to contain mines, and show that mine, and for testing purposes, those mines are currently showing. What do you think I need to do to be able to say[code]...
View 3 RepliesSo basically, i have successfully randomized certain pictureboxes in a grid to containmines, and show that mine, and for testing purposes, those mines are currently showing. What do you think I need to do to be able to say:
View 1 Repliesi want to get the text that is input by the user to the textbox and use it in the parameter but why can i done this.. i declare a name for the textbox that i created during runtime but i cannot get what the text that input by the user.i use the (textbox name that will create during runtime).text but it gives me a blue line.
View 7 RepliesI have been doing occassional VB.NET for a few years but never had the need to do something like this until today.My app creates a few comboboxes during runtime, and I need a way to assign the values of those textboxes at design time.
View 9 RepliesI wanna to load a web page and login.I know how to do this with a web browser control but:I wanna to create the control runtime and in the memory and not showing anything in the form.I wanna to load many pages in the memory and extract my information needed without anything to see by user.
View 1 RepliesMy program creates columns at runtime with the following code:
Cmd = New OleDb.OleDbCommand("ALTER TABLE [Parent] ADD [" & ColumnDate & "] int", con)
objCmd = New OleDb.OleDbCommand("ALTER TABLE [Parent] ADD [" & ColumnDate & "] int", con)
objCmd.ExecuteNonQuery()
I add data into the newly inserted column with the following code:
da.SelectCommand = New OleDb.OleDbCommand(sql, con)
Dim cb As New OleDb.OleDbCommandBuilder(da)
cb.QuotePrefix = "["
cb.QuoteSuffix = "]"
ds.Tables("SchoolMaticsDatabase").Rows(inc).Item(ColumnDate) = Hours * Num
da.Update(ds, "SchoolMaticsDatabase")
All of the above works fine; the issue arises when I try to edit the information originally placed in the newly added column. These are the approaches that I have taken. (None of them give an error message; it simply won't update within the database.)
da.SelectCommand = New OleDb.OleDbCommand(sql, con)
Dim cb As New OleDb.OleDbCommandBuilder(da)
cb.QuotePrefix = "["
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I added a column to the table manually via opening the access database and all the above approaches work for editing data stored in that column. So I believe it is something to do with the fact that the columns are created at run time.
I add textboxes dynamically at runtime. How do I access them later in the program?
View 1 RepliesI have written some code to generate 10*10 textboxes during run-time.the problem is; I don't know how to access / change them after they are created. after some googling, I found this code to show the text of ie box42;
MessageBox.Show(Me.Controls.Item("box42").Text)
but it gives an error (nullreference exception was unhandled) hereby the code;
For i = 1 To 10
For j = 1 To 10
Dim tb As New TextBox
tb.Name = String.Format("box{0}{0}", i.ToString, j.ToString)
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I have found multiple examples of how to drag and drop images, but all of them use controls that are already on the form at runtime.
In my program, all of my pictureboxes are being drawn during runtime with the following
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how would I create an event procedure for something not yet on a form?
View 3 Replies