Refresh Combo Box In Windows Form?
Mar 9, 2010
I have a Main form (a window form) in VB.NET which has a Combo Box to display a list of countries. A sub form activated from a "Button" on the Main form allows users to add Countries to their list. But After Adding a new entry the Combo Box on the Main form does not show the update (while it is still open). I have to exit the main form and relaunch it to see the update.
The populate function in shown below. I call this method after adding new countries but still; not good. I have used Invalidate function of combo box but of no use as well.
Public Sub PopulateCountry()
Dim rsLocal As New ADODB.Recordset
Try
[Code]......
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Jun 5, 2009
Lets say i label "label1" , and 2 buttons named "button1" and "btnRefresh " [code]So , when user press the button 1 , the text will change. But what should i put inside btnRefresh to reload the forms ? and display the default label.text = "Form Load" ???
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May 12, 2011
In my project one task is there how to refresh the windows form in vb.net
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May 12, 2011
how to refresh the windows form in vb.net.
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May 12, 2011
in my project one task is there how to refresh the windows form in vb.net window
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Apr 16, 2009
I am working on VB.Net. I have a sub form with a datagridview, that is being loaded with the criteria taken from another form. Hence this form is called with parameters.
Here is the code that calls the sub form.
Code:
where ds is the dataset to fill the datagridview and rb is the string from a radio button on this form.
Here is the code in the sub form.
Code:
Now, I need to refresh this sub form every -- minutes, depending on how the user wants it to be. For this I have given a NumericUpDown control to select the mins. All this works fine. But how do I refresh the dataset and the datagridview?
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Jun 12, 2011
launch a Modeless Dialog I am used in me.showintaskbar property to remove application from taskmanager.but it removes the form(application)it still refreshes.How to stop the form refresh.
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Mar 19, 2011
I'm using windows form (vb2010) for data entry.. so now I want to add a combo box into my windows form using sql code because all my connection & Inserting records in SQL command. And other important matter is the combo box should connect to my SQL Server database Table.
Combo table Name : TblPosition
Data entry Table : EmployeeList (with EmpId, EmpName, Position, BasicSalary) fields.
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Jun 16, 2009
I have some text boxes in my form that takes data and saves the data to the database. There is a combo box at the bottom of the page that loads data from a specific field of a database. when I enter and save the new data (using the textboxes), the combobox doesn't show the newly entered data. I tried to refresh the combobox using code like combobox.refresh, me.refresh etc, to refresh the form but nothing is working the combobox only display the new data when I close the form and reload the form again. anyway, the data loading in the combobox is done using datasource, displaymember, valuemember in the properties. So, how can I make the combobox show the just added record (field)?
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Nov 9, 2011
I have a program where a user can select something from a combo box in a data grid view control. I have it so that they can add something to the combo box via input box. The new item would automatically show up in the combo box at the bottom.
Now the problem is with deletion. I have it so that a user will click delete and a dialog box will pop up with the combo box. There a user will select an item and click delete. The item deletes just fine from the db but it doesn't update the combo box on either the delete dialog box or the datagridview. The only time it shows deleted is when I exit the program and reload.
Here is my load event that populates everything.
Public Sub LoadData()
Try
Dim cmTasks As New SqlClient.SqlCommand("Select * from Tasks where Department_ID =
[Code]....
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Nov 15, 2011
I just had a question because I cannot seem to find the answers anywhere on the internet... also we are not upto this part in class yet.. Say I have 2 combo boxs... cmb1 and cmb2.. both are datasets from an access table.. how do I make it so cmb2 refreshes based on the value of cmb1? eg; if cmb1 is say, period 1, then i want cmb2 to only show results bases on items I have in period 1?
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Sep 17, 2009
The ComboBox Items collection is an ObjectCollection, so of course you can store anything you want in there, but that means you don't get a Text property like you would with, say, a ListViewItem. The ComboBox displays the items by calling ToString() on each item, or using reflection if the DisplayMember property is set.
My ComboBox is in DropDownList mode. I have a situation where I want to refresh the item text of a single item in the list when it gets selected by the user. The problem is that the ComboBox doesn't re-query for the text at any time besides when it loads up, and I can't figure out how else to do what I want besides removing and re-adding the selected item like so:
PlantComboBoxItem selectedItem = cboPlants.SelectedItem as PlantComboBoxItem;
// ...
cboPlants.BeginUpdate();
int selectedIndex = cboPlants.SelectedIndex;
[Code]....
This code works fine, except for the fact that my SelectedIndex event ends up getting fired twice (once on the original user event, and then again when I re-set the property in this code). In this case, it's not a big deal that the event is fired twice, but it's inefficient, and I hate that. I could rig up a flag so it exits the event the second time, but that's hacking.
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Dec 5, 2011
I have a datagridview bound to a bindingsource. This datagridview contains one column which is a combo-box.
Upon a click on a button,I change the underlying datasource. The selected values of the combo-boxes change.
But the change doesn't appear on the screen ! To make the changes visible (refresh each combo-box), I have to hover on the datagridview with the mouse or use the scrollbar !
Question 1 : why do I see this ?
Question 2 : what should I do to make the changes immediately visible ?
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Jul 16, 2009
See the below
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
[Code]....
the last value inserted into the access database will be add to the drop down list of their corressponding combo box.
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Aug 11, 2010
I was trying experimenting with things and I was stuck in a way about how to refresh a webpage from a windows form. E.g.: a start button on the form refreshes the page [URL] and stop button stops the process.
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Jun 2, 2011
I try to find out a way to refresh desktop and Window Explorer after change in registry.
I use VB.Net 2008 and my OS is Windows7.
I Show/Hide File Extension in Registry with this [code]...
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May 26, 2011
How to programmatically refresh the ExplorerBrowserControl? I can press F5 to refresh, but I want to put a refresh button for it.
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Mar 7, 2010
How do I refresh the system (Windows XP) using the Visual Basic 2008.
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Nov 9, 2011
I am using VB.net in VS2008.I wrote a screensaver that cycles through pictures. When the screensaver exits it sets the desktop background to the last picture loaded using API call SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, sFilePath, SPIF_UPDATEINIFILE Or SPIF_SENDWININICHANGE).The desktop wallpaper refreshes for WinXP and Vista but not Win7.In Win7, if I run the screensaver as an EXE then the desktop background changes when the program ends. If I run it as a screensaver I need click on the desktop and press F5 before the desktop shows the new desktop background (or click and drag with the mouse to show pieces of the new desktop background).I have tried to add delays and even force a refresh by using SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, Nothing, Nothing) but with no success.
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May 31, 2008
I have a parent form that has a combobox. Whn the form loads I get the data from the db and bind to the combobox. that works fine and here is the code I use in form load to cause this to happen: [code] Now if there is not an Account Type, I have a button that will pull up a small form to allow the addition of an account type. The popup form adds the data back to the database just fine, but I am now trying to get the combobox to refresh its data. So I call a public Sub that is located in the parent form to from the popup form to accomplish this task and I have walked the code and the sub is called and appears to work correctly, but the new data never appears in the combobox. Here is my public sub that i call to try and refresh the combobox on the parent form. [code] But when I go back to the parent form, the combobox is not updated with the new account. How can i get the combobox to refresh from the database with the new data?
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Feb 15, 2009
The application I'm developing does some file management chores, such as renaming and deletion of files. I have noticed that often after a file is deleted via code, it is still shown in Windows Explorer although it doesn't exist anymore. A refresh (F5) solves this, however I wouldn't want end users to have to press F5 every couple of minutes when using the application.
Can a refresh of all open Windows Explorer windows be requested via code? Moreover, can the refresh be requested only for windows displaying a particular location? I've thought of getting all open windows, filtering them and then sending the F5 keystroke, however it sounds a bit like overkill. Any easier way to do it?
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Oct 26, 2011
I have created a custom designer (PannelloSfondoDesigner) for my custom control, a background panel (PannelloSfondo).
<Designer(GetType(PannelloSfondo.PannelloSfondoDesigner))>
Public Class PannelloSfondo
Inherits UserControl
[code]....
It works, I click the little arrow, the context menu appears:I click the menu item, the event is fired, the control is docked:but the menu description is not updated or refreshed (it should show "Undock from parent container"). Then if I click outside the control to deselect it and then I click back on the arrow to show the menu, the right menu item is displayed:How do I refresh the menu items?
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Dec 12, 2009
I login webservice then upload files then i download files i do this inside the looping in the processing i have to change the picture box picture the Timer Event fires but the picture does not changes it seems form doestn't refresh
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Jun 12, 2006
I have created a simple VB.NET application with one form and a few modules. When a user clicks on a run button of the form the application starts and goes through differet cycle, while updating the user on status bar, runs for less than four hours.
The application works fine, it gives desired result. However, it is not able to refresh the user form, meaning status bar remains same after some time (it suppose to increment). Even when I take mouse on the form it shows timer symbole instead of default one.
My application commands another device using GPIB. Basically, PC running my application commands the device. If I look the display of device it gives correct information.
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Oct 7, 2011
I have a form, with a datagridview. I can see the data and the related records in the DGV.I have another form that this one calls to add a new record. I need that because there are some specific parameters i need to control. But when the focus returns to the original form, I can't see the new record, even though it is there (I see it in the database).If I close the form and enter again I can see it, that is not what i want.How can I refresh the tables after the other process adds data to them?
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Jun 3, 2010
I'm using Mysql database and Visual Studio 2005. I've got a form with datagridview, After making the changes in the data, it is saved in the database. The data gets saved in the database, but the modified data does not get displayed in the datagridview. Only if I close the form and open it again, the changes are displayed. I want to provide a button (refresh-button), which on clicking will refresh the datagridview, so that the modified data is displayed without closing the form.
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Jan 29, 2010
I have in my code the CBN_DROPDOWN command that is sent using a Windows Message, but I want to be able to make the Combo Box List Drop Up as well. Does anyone know if this is possible or how I can do it?
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Jan 30, 2012
Been playing around with this and simply can't get it to work
I've got a form and I've created a button called refresh. The button is meant to do exactly that. What happens is that when the form loads, it checks the database for values. If it finds values, it creates a dynamic edit box related to the value.
I open the form and it paints accordingly and as I expect it. If I delete a value from the database then click the refresh button, it should re-draw the form and paint the background grey. The logic definitely works because I trapped the bit of code and it does hit the part where it's meant to set the background grey.
Now, I'm not sure I'm refreshing the form properly because all I'm doing within this sub is calling the form on load event: formLRQuadrantSchedule_Load(Me, New System.EventArgs)
This seems to work logic wise, just not doing what I want. So, I tried this (amongst several other things):
Dim dynTextBox As New TextBox()
Me.Controls.Add(dynTextBox)
With dynTextBox
[Code]....
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Sep 28, 2010
I'm having an application which has to perform exporting and importing data. At the moment he runs those functions, I want a form to popup with an animated gif, so my client sees that the application is still running.But the animated gif stops sometimes, because he is busy doing stuff (like copying files, etc...)Is there a way to tell the form to refresh automatically every 0.1 sec, so the image runs fluidly. I tried to put a timer in my form, and start the timer as from the form is shown...the timer_tick says he has to refresh, but he doesn't want to do that.
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Aug 15, 2011
'Informs you forgot email.
If TextBox1.Text = "" Then MsgBox("Forgot E-Mail")
If TextBox1.Text = "" Then Me.(PLEASE TELL ME WHAT TO PUT!
[code].....
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