Windows Forms Datagridview Doesn't Show Data?
Oct 7, 2009
I have a user control that contains a search value text box a button, and a datagridview to display what the data adapter found. In the data set designer, I have an ODBC connection to a table, with two SQL queries defined FillByCustomerName(NAME), and FillByCustomerNumber(CUSTOMER_NUMBER). If I preview the data in the designer, I see the data expected. The datagridview doesn't show any data. The functions PopulateGridByName and PopulateGridByNumber do the work. I've tried adding a dgCustomer.show statement, The form that calls the user control has no codebehind code, and throws no errors.
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Try
Dim SearchValue As String = CreateSearchValue()
[Code].....
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Sep 8, 2010
I have a test app driven by bluetooth serial events In my form load code I hide the cursor so it doesn't get in the way of pictures (fullscreen) When one event is called by bluetooth, it brings up a msgbox and the user has to click OK. I tried Windows.Forms.Cursor.Show() but it doesn't work.
I'm guessing it's something to do with delegates and events and the form, but the debugger doesn't complain at any point. It just refuses to show the cursor. How can I get my serialport event to show the cursor? And then hide it after?
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Sep 21, 2009
I have a form that has around 4 txtboxes. Data is inserted into these boxes and then a "Save" Button is pressed. I have a GridView added to my form and want to view the entries. The issue I am having is that when I click the save button the data doesn't show up in the DataGridView until I close the application and then re open it.
[Code]....
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Dec 11, 2009
I'm using Visual Basic Express 2008 in Windows 7(64-Bit). I've added a datasource to my project and dragged a table from Data Sources onto my form. It automatically created a DataViewGrid and placed this statement in my form load event:
Me.BillsTableAdapter.Fill(Me.DoBills_2009DataSet.Bills)
The DataGridView shows all the correct fields/columns. The .DataSource property for the DataGridView is set to the automatically created BillsBindingSource. When I preview the BillsTableAdapter, the data appears. But data does not appear when I run the app. The datagridview is empty. When I build the app and run the executable, I get a Microsoft .NET Framework error message that says: "Unhandled exception has occurred in your application. If you click continue, the application will ignore this error and attempt to continue. If you click Quit, the applicaiton will close immediately. The 'Microsoft .ACE.OELDB.12.0' provider is not registered on the local machine." If I click "Continue" I get my form with an empty DataGridView. What am I missing to get the data to display in the grid at run time? Oh, and I've also tried using the DataGridView in C# and I get the same problem.
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Feb 12, 2010
A VB routine assembles a string of email addresses. It is sent to the clipboard with
Clipboard.Clear
Clipboard.SetText Atext
Where Atext is the address string The email client is opened with
lRet = ShellExecute(hWnd, "open", "Mailto:", vbNull, vbNull, SW_SHOWNORMAL)
At this point, when the email client is Outlook, the clipboard doesn't show what was added to the Windows clipboard above regardless of whether we use a left click in the BCC box or a CTRL-V.
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Jul 9, 2010
I have a basic three form application. It doesn't seem to close after navigating through forms. If I were to open the application, and the main form is displayed. If I press the X button, the application closes fine(Goes from processes) If I were to open the application, and then navigate from the main form to another form using me.hide & form1.show, and press the red X on Form1, the application again, closes fine.
[Code]...
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Mar 15, 2010
I was looking for a solution to run a lengthy job (looking for files on the fixed drives) withouth freezing the UI, and saw that using a BackGroundWorker control is the recommended solution.
Problem is, I don't see its ProgressChange event being triggered:
Imports System.IO Imports System.Text.RegularExpressions
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Button1.Enabled = False
[Code]...
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Jun 16, 2012
I'm using a DataGridView that gets its data from table in Microsoft Access, one of the fields is a Short Time type record (e.g 16:00) but when the DataGridView is loaded it shows the record as "16:00 12/31/1899" and never shows only the ShortTime.
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Jan 19, 2012
I have a dictionary (literally) database file in Access: its Fields are Headword (string) and Definition (Memo, it's in Rich Text). The Rich text looks fine in Access, but when I connect a Visual Basic (2008) Datagridview control to the database, the text looks like HTML, not RTF, and when I try to copy a specified "definition" into a RichtextBox, I get the same weird symbols, not RTF. One attached snapshot is how a record looks in Access, the other in a VB 2008 form with a datagridview control and an attempt to paste contents into a RichTextBox.
How can I get that same "look" from the RTF in the original Access file? I'm only recently moving from VB6; not a professional
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Feb 24, 2010
I'm trying to put data in my listview but the data doesn't show in my listview.
When i put this code in my form i dont have any problem but when i put this inside the module the data doesn't show up.
Code:
Public Sub getEmployee(ByVal myConnString As String)
Dim mySelectQuery As String = "SELECT names FROM employee ORDER BY ID ASC"
Dim myConnection As New MySqlConnection(myConnString)
[Code].....
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Jul 18, 2012
why my crystal report dosesnt show any of my data.
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Jun 29, 2011
my windows forms printdialog doesn't appear when i call showdialog.[code]
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Mar 4, 2010
I don't understand what's going on here I published my project, and when I create new records and save them, everything gets saved and shows up each time I run the program.I open the database in SQL Server and none of the tables have the new data, but it still shows up when I run the program each time.
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Jun 13, 2011
Private Sub CreateChart()
Dim time2, tp As String
Try
[code]....
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Jul 14, 2011
I've run into a problem that I'm at a loss to understand and/or work around. I'm working on a settings page that updates an XML file. The page has an XmlDataSource with a transform file (to filter and sort the values) and a DataList that is populated from the XmlDataSource. A user can enter a new group name into a text box and click a button to submit the form. When this happens, the new value is successfully added to the XML file.
[Code]...
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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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Apr 20, 2010
I have the following code and I can't get the lost focus to work.
Private Sub txtSpeed_KeyDown(ByVal eventSender As System.Object, ByVal eventArgs As System.Windows.Forms.KeyEventArgs) Handles txtSpeed.KeyDown, txtSpeed.LostFocus
[code]......
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Nov 7, 2010
How do you refresh a datagridview in code to show to show new data in the DB?
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Oct 11, 2009
when I inserted a DataBase into my Project. I went to the preview data dialog box and I can only see Field1 "text" but not field 2 "Bitmap Image"it says unable to display the given data...
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Jan 13, 2010
I'm working on a simple base form in which all the other forms in the project will inherit. This base form only adds 5 properties (at the moment) dealing with painting a gradient background. The problem I'm facing right now is when I change a property on Form1 (the test form) and click run it doesn't show that change. I also checked the .designer.vb file and when I make a change it's not added to the code behind file, I'm at a loss right now to why.
[Code]...
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Mar 14, 2010
When trying to compile my newly created ClassLibrary class 'Validator' that validates entries made into TextBoxs or MaskedTextBoxs, I get the following error:
Warning 1 Namespace or type specified in the Imports 'System.Windows.Forms' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. C:Users erryDocumentsVisual Studio 2008ProjectsMillerClassLibMillerClassLibValidator.vb 1 9 MillerClassLib.
Following is the first part of code in the class:
Imports
System.Windows.Forms
Public
Class Validator
[code]....
What can I do to resolve this problem? The classes in this class library will be used to validate forms data input in a number of varied projects.
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Aug 15, 2011
I have insert data to MS.Access and re-load data to DataGridView, it's always do at LoadAllData() but some time datagridview is not refresh.
[Code]...
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Aug 23, 2009
public sub show(as owner system.windows.forms.iwin32window) error
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Apr 15, 2010
It seems like when there is only one row at the data grid view with a data source pointing to a data table, it's row state for the data table doesn't change when editing. It remained "unchanged" reguardless to how many columns I had entered. However,after editing, when you click on a different row or click on any of the column headers to change their sorting, the row's state from the data table then gets changed to "modified". I'm not sure why the data table's row states gets changed only when you do those things instead of finishing editing itself. Couldn't the data grid view be able to change the data table's row states when you finished editing a cell?
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Feb 12, 2011
bind to a database column and show the value in a separate linklabel1 or Listbox control in windows forms.
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Jun 12, 2011
I am trying to change the background color of a tooltip
I am using tooltip.backgroundcolor = color.colr
No errors but thecolor doesn't change
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Apr 29, 2009
[Code]...
First i populate the data i wan in a listview than i click on a button to export all the data in the listview into a notepad call default.txt but upon clicking the button i realise that there no data inside my notepad
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Mar 30, 2010
How to show data from my database in datagridview and i can add,edit and delete in datagridview
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Nov 15, 2011
IS it possible to show data in DataGridview columnwise?????"
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Jun 21, 2010
OK, in it's simpest terms, I have a custom object (all string Items) which I add to a list of those items. The list is declared as a global variable. One form updates the list, another contains a dataGridView (vs.net 3.5) that displays the list items. The view displays the correct data. For some reason, if I select a header in the dgv before it's populated, that's fine, but if I select it (click anywhere with the mouse) it bugs out with an Index = -1 error from the System.Windows.Forms. CurrencyManager.get_Item(Int32 index) bit.
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