VB2008 : Find The Underlying DataGridView When Using ContextMenuStrip And ToolStripItems?
Oct 3, 2009
find the underlying DataGridView (DGV) when responding to a Right Click on a ToolStripMenu (TSM).I have several DGV's all using the same ContextMenuStrip (CMS) [DGV.ContextMenuStrip=CMS]I have six ToolStripMenuItems under the CMS. I thought I could just add a unique handler for each of the ToolStripMenuItems and be a happy camper on each Right Click...But I cannot figure a way to decode the underlying DGV. There doesn't seem to be any relationships between DGV and TSM and none between CMS and TSM.Is this path a dead end? If so how should one do it? FYI my DGV data is unbounded.
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Sep 4, 2009
At design-time I have added the ToolStripItems to the ToolStripDropDownButton but I want to provide a Context Menu which has the same items but when I am adding the items to the ContextMenuStrip at runtime they are removed from the ToolStripDropDownButton and are only available to the ContextMenuStrip already, is it not possible to have them in both ToolStripDropDownButton and ContextMenuStrip?Rather than duplicating the menus I would have preferred utilizing them in both ToolStripDropDownButton and ContextMenuStrip.
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Apr 25, 2012
I've got a databound query in my application which is querying the "Customers" table in our database.I've created this directly from the ComboBox's datasource creator in the Design view.Various bits of code created in the designer include:
Me.CustomerBindingSource.DataSource = Me.CustomerDataSet
Me.ComboBox_Customers.DataSource = Me.CustomerBindingSource
What I've done in the first stage of developing this feature is to show my users a ComboBox showing a specific subset of the customer list by applying a filter to the BindingSource.
Me.CustomerBindingSource.Filter = "someColumn = 3"
What I want to do on a second pass is to allow the users to type a specific bit of information into a textbox and check whether it appears in Me.CustomerDataSet like so:
Dim x As IEnumerable(Of CustomerDataSet.customerRow) = From cust In Me.CustomerDataSet.customer Where cust.custno.Trim = "test"
If x.Count <> 0 Then
At this point, I have a customerRow object. I want to check whether this customerRow object appears in the list presented to users in Me.ComboBox_Customers via the filtered Me.CustomerBindingSource. Me.CustomerBindingSource does not (directly) contain customerRow objects, it contains Object objects.How do I find out whether Me.CustomerBindingSource contains the customerRow object at whatever lower level?Also Once I've determined that Me.CustomerBindingSource contains the item, how do I select that entry in the ComboBox?
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Mar 27, 2012
I need to force a DataGridView cell to update the underlying DataTable.I fill a DataTable using my adapters Fill method, then set that DataTable as my DataGridView's datasource. Lets say one of my DataGridView columns is a CheckBox column.If I left-click a checkbox in the first row and then left click a different row in the DataGridView the underlying DataTable_RowChanged event fires, which tells me the first edit I did has gone to the underlying DataTable.If I left-click the checkbox in a row and then right-click the column header to display my context menu the DataTable_ RowChanged event doesn't fire because the DataGridView row is still in edit mode.I've tried Me.DataGridView.EndEdit(),but that doesn't cause my RowChanged event to fire,I need to ensure my underlying DataTable matches the data in the DataGridView, because I am getting a subset of my original table.[code]
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Jan 19, 2010
I'm looking for a simple example in VB2008 code.I have the Northwind DB installed on one of our SQL servers.
I've worked with the Datagridview on serveral occasions but never used its update,delete or add functions. I've Googled around the web, but could not find a simple example.
Whats the best way to do this and implement it using LINQ?
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Sep 27, 2009
I am formerly a VB6 programmer learning the .Net world of VB2008. I am confused and need assistance with the following.I am attempting to get a ContextMenuStrip to work on a DataGridView. I want my program to add the ContextMenuStrip and fill in its menu items. I would then like a right-click on a menu item to take me to a unique click event to handle the specific menu action.The example below is a simple form with a datagridview (1) and contextmenustrip (1). I could not get it to work without adding the ContextMenuStrip control manually.
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Apr 27, 2012
I'm trying to show a small DataGridView in my ContextMenuStrip that I have built. The DataGridView will show a unique list of values in a DataGridViewTextboxColumn "Sample ID" when its column header is right-clicked. I can get the unique values just fine, but I'm having trouble displaying the small DataGridView in the ContextMenuStrip. It currently looks like this.Notice, there is no data in the DataGridView. I have confirmed that the DataGridView.DataSource has several rows in it, yet the DataGridView shows nothing. Plus, I need to increase the size of my DataGridView, thus increasing the size of the ContextMenuStrip to show the DataGridView.
Public Class ContextMenu_Column_String
Inherits ContextMenuStrip
Private dvs As DataGridViewSettings
[code]....
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Sep 19, 2011
I'm trying to show a custom contextmenustrip on my datagridview and it works fine except when the cell is being being edited. Then it shows the default windows contextmenustrip with copy/cut/..Is there a way to overwrite the DataGridViewTextBoxCell contextmenustrip or disable it? The solution from Disable DataGridView System ContextMenu does'nt work for me.
Private Sub DataGridView1_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles DocCostGroupDetsDataGridView.MouseDown
If e.Button = Windows.Forms.MouseButtons.Right Then
_CustomContextMenuStrip.fGetContextMenu()
[Code]...
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Jun 18, 2009
If you assign a ContextMenuStrip to the DataGridView.ContextMenuStrip property and then right-click a cell, the CellMouseClick event doesn't fire. Why would the ContextMenuStrip block this event from occurring?
My workaround at the moment is to separate the ContextMenuStrip from the DataGridView and show it with code, but this seems unnecessary.
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Feb 26, 2009
I have a datagrid view in my windows form which is bound to a datatable. one of the column have the status code and i want to display the status description of the same which is defined in an array.can we have display text and value of the column different. i dont want to go with datagridcombobox column.
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Jul 2, 2010
I'm working on a project that has to do with making a parent mdi form. I'v created the form but I can't set the MdiList property to true cos I can't find it in the property window. For this reason, my windows menu can't list the opened child windows.
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Jul 14, 2009
Lets say I have opened image on the screen. I want to find coordinates of little object on that picture. I know pixel pattern of that object.
[Code]...
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Nov 18, 2009
As know mid(source, wordstart, wordlength) in VB6 source.substring(wordstart, wordlength) in vb2008 what differebce between both ?i can run it "mid(source, wordstart, wordlength)" at vb 6 with no problem,but i can't run it" source.substring(wordstart, wordlength)" at vb2008 'System.ArgumentOutOfRangeException' happened with System.Windows.Forms.dll
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Mar 17, 2009
I whould like to find the IP address of a game server that sends UDP packets to my PC. Of this server I know the fixed Port number, but not the IP address
I can read the netstat -anp udp data and store them in a text file... but this command don't displais the IP Address and the Port number of the external servers, only lots of asterisks
the question is: how to retrieve this IP address?
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Mar 21, 2011
with the code
Marshal.GetLastWin32Error
I obtain a number.... but WHERE can I find an exhaustive textual explanation relative to the number?
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Jun 15, 2010
How would I add a new ToolStripItem with code, which will have a Click event which uses the text from the ToolStripItem to read a file? So the ToolStripItem most somehow send it's text to the Click event.
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Nov 11, 2011
I have created a custom ToolStripProgressBar. It is basically a class inherited from ToolStripStatusLabel, and i paint the 'progress' bar myself (just a simple rectangle). I have tried creating a custom ToolStripProgressBar using different methods including inheriting from both ProgressBar, ToolStripProgressBar and ToolStripControlHost. I always ran into difficulties doing in this way. Inheriting from ToolStripStatusLabel works well, but with one issue...
In order to have the progress bar update in the statusbar, i have to call StatusStrip.Refresh. Trouble is, adds a huge overhead to the drawing of the progress bar graphics. Simply calling the invalidate method of my ToolStripStatusLabel does not seem to render anything to the screen. how to have my graphics draw without calling the refresh method?
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May 27, 2009
I have a DGV that has a check box in the first column to indicate marked rows. After the user marks the rows they want then the OK button is pressed and the form closes. I need the row data that they marked to be transferred some sort of temp db (preferably in memory - 30 rows or less) so I can insert the data to a tabbed UserControl. I also would like to retain that row data while they are working so in case they want to open the form with the DGV again that the previous marked rows show up.
[Code]...
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Jul 23, 2009
I have acess database and it has one table name as "SMF" and that table has 4 fields (Item_code,Item_name,Item_decription and unitprice) I have 2 quetions
1. I want enter the Item_code to the datagridview combobox colume
2. when i select one Item_code i want to automatically enter the Item_name,Item_discription and unit price of that Item_code to the datagridview colume
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Dec 15, 2011
i created 20 tables in ms access.. and only one table is connected to vb 2008 using the DataGridView?.. how can put the remaining tables in ms access to the vb 2008?
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Sep 3, 2009
I currently have both DGV.CellMouseClick & DGV.CellMouseDoubleClick implimented in my code.The DGV.CellMouseDoubleClick never fires and the DGV.CellMouseClick always fires. The only exception is when I position the cursor between DGV cells and get the double arrow. If I double click with the double arrow then I get the DGV.CellMouseDoubleClick to fire
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Nov 11, 2009
Is there any way to merge cells in datagridview in vb2008 like we could do it in excel?
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Apr 20, 2009
how can you create find & find next (using tooltip menu) create in vb.net for datagridview value.
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Oct 29, 2010
how to get the DataGridView CellMouseDoubleClick to fire when a user double clicks on a DGV cell.I currently have both DGV.CellMouseClick & DGV.CellMouseDoubleClick implimented in my code.The DGV.CellMouseDoubleClick never fires and the DGV.CellMouseClick always fires. The only exception is when I position the cursor between DGV cells and get the double arrow. If I double click with the double arrow then I get the DGV.CellMouseDoubleClick to fire.I need to take different actions for users RT-Click, RT-Dbl-Click, LT-Click and LT-Dbl-Click.
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Jan 5, 2010
I have a program that opens a FormReportViewer. I get an error when I close my program...COM object that has been separated from its underlying RCW cannot be used.
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Dec 13, 2011
I'm designing an ATM where I have to allow a user to "insert" his card and then conduct transactions. After the first user is done, without closing the application, another user should be able to use the ATM. However, whenever I try to log the second user in, I get the following error: COM object that has been separated from its underlying RCW cannot be used.
My code for the opening screen is as follows:
Imports System.Data.OleDb
Public Class StartScreen
'Form-wide variables
[code]....
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Jul 14, 2011
Is there something like VBA's ScreenUpdating=Off in VB.Net? I mean, I want to manage the underlying data and wish it would not reflect on the screen until the end.
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Jun 15, 2012
I'm trying to show a modal form below my text how can I set form position?
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Aug 29, 2010
how to enter a data that i enter in textbox to a datagridview... for example i enter in the textbox is round and when i click add it will go to database... im using ms access database
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Aug 3, 2011
I am retrieving data from my database using a TableAdapter. I was wondering if there is some way I can tell (or be informed) that the data has changed and I therefore need to do another Fill? That way I can just Fill on demand rather than every time the user requests to see the information and I am forced to do a Fill before showing the data because I don't know if is current or not. For the record I am using an ODBC connection string to access a Pervasive PSQL database
EDIT I was thinking I could check the last write time of the MKD file to check if this has changed but this doesn't seem to be reliable as it is not written to until the connection is closed. Does anyone know the circumstances when this is written?
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