DataGridView Challenge?
Jan 8, 2010In a DataGridView I have two columns and multiple rows.All rows in column 1 represents a computer name and all rows in column 2 represents the given computer's status.
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C# - Regex Expression Challenge?
Sep 1, 2009somebody put a regex expression that will:find a chunk that starts with [% and ends with %] within that chunk replace all xml special characters with:& quot; & apos; & lt; & gt; & amp;leave everything between <%= %> or <%# %> as is except make sure that there is space after <%# or <%= and before %> for example <%=Integer.MaxValue%> should become <%= Integer.MaxValue %>
source:[% 'test' <mtd:ddl id="asdf" runat="server"/> & <%= Integer.MaxValue% > %]
result:'test' <mtd:ddl id="asdf" runat="server"/> & <%= Integer.MaxValue %>
Guru Challenge Beep In Win7 64bit
Mar 18, 2011I just switched to Win7 Ultimate edition 64bit and now the beep functionality via internal speaker (system speaker on motherboard) does not work anymore.The reason is described here (basically M$ trying to clean up their code):url...I used "Console.Beep(a,b)" to notify me that a process has ended.Any ideas how to send some kind of acoustic signal through the internal speaker (any loud noise would do for my purposes).
View 14 RepliesVS 2010 A Data Entry Formatting Challenge
Dec 12, 2011I'm updating a program that was written in an older version of VB (by someone else) and I can't figure out to how replicate this data entry line in my Form.
Each textbox can be changed and there is a nice scroll bar at the bottom to move left and right as you enter each datapoint.
I tried using multiple tabs within a Panel and setting the Appearance to FlatButtons, but the text area under each tab gets covered when you select another tab.
Open Challenge To Vb Community Reading Grib Files
Nov 25, 2009I have looked everywhere on this but do not know anyone who have accomplished it so far that is how to read values from a grib (gridded binary) file. Below is a link for Environment Canada where they store the forecast values in grib format. These file can be opened using tools like wget but is nowhere close in reading the data values from the file itself.url...
View 2 RepliesOpen Challenge To Vb Community: Reading Grib Files?
Mar 17, 2010I currently have a program that I made which opens other apps packaged with an installer. I have set the installer to install everything to the Program Files folder. However, not all computers have a C: hard drive. I have a way in which they can enter their drive letter in one form then in the next form it remembers the drive and will take them to the program. The problem is my program stores the drive letter in an xml file. On the startup of the program it looks in the xml file to find the drive letter, if there is no drive letter the form opens then lets the user set his drive letter. The xml file is stored in the folder "Math Wizard" in the Program Files folder. But if not all
View 3 RepliesProgramming Challenge (not Homework) Editing Many Files Quickly
Dec 3, 2009I have 202 .html files and at the beginning of each file, I need to add a chunk of php code. I could make this myself, but to be honest, it would take me forever and I might as well just manually edit them lol. All the .html files are in one folder.[code] one other thing that would be VERY cool, is if it could add the files that are not edited to a listbox or an outputted text file.
View 12 RepliesSpanish Accented Letters - Internationalization / Localization Challenge?
Sep 2, 2010illustration demonstrates my challenge in having accented letters in Spanish showing up correctly on a desktop application. I understand this forum is not for Windows forms but I thought someone may have run into this possible UTF-8,UTF-16,Unicode issue in other areas or web/desktop applications.
View 2 RepliesIDE :: FindWindow(Ex) + SendMessage Mouse Click (on Specific Coord). Looks Like A Challenge?
Dec 4, 2006I just bought a nice G15 Gaming Keyboard. It has a nice LCD screen with media keys (Play, Stop, Next, Previous etc,).Anyway, I managed to intercept the original functions to WMP of it (By Global Hotkeying them).Now, I have to send mouse clicks to my own Music Player (Playa!TraX, it isn't my creation) on a specific coord.This is the code i have, it finds the window, and says it clicks, but nothing happens, what am I doing wrong?
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal Hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
[code].....
.net - Working With The ObjectQuery Single Enumeration Challenge In Linq-To-Entities Entity SQL?
Dec 30, 2011I'm working on modifying this example:
Using advWorksContext As New AdventureWorksEntities
' Call the constructor that takes a command string and ObjectContext.
Dim productQuery1 As New ObjectQuery(Of Product)("Product", advWorksContext)
[code]....
An ObjectQuery can be enumberated only once. (Subsequent attempts at enumeration throw an exception.) The enumberation takes place in the for each statement. The problem is that if the query is empty attempting a For Each will throw an exception. But if I check for a count:If productQuery1.Count > 0 Then . . .
That eats up my one chance at enumeration. I could nest the For Each in a try/catch block and throw away the empty query exceptions, but that's ugly.
Challenge - DateTime Minus DateTime?
Mar 14, 2011Assume the following program is started at 1:59:01 AM on 3/13/2011 in the United States. The first time Timer1 ticks what will be the value of the TimeSpan (ts)?
Public Class Form1
Private Sub Timer1_Tick(sender As System.Object, _
e As System.EventArgs) Handles Timer1.Tick
[code].....
DataGridView Input Validation - Certain Column On Datagridview Should Accept Integers Only, Otherwise, It Will Return A Messagebox
Jun 5, 2011Some codes here on how could I validate my datagridview? I mean, a certain column on my datagridview should accept integers only, otherwise, it will return a messagebox. Kindly include on which event it should be posted.
View 17 RepliesDB/Reporting :: Displaying DataGridView Text Column In A Mixed Bound/Unbound DataGridView?
Mar 15, 2011I have a DataGridView (dgv) on a Windows form (VB.NET) which is bound to a datatable. One of the bound columns is a an ID (Foreign Key) to another datatable. All I want to do is Hide the ID column and populate an unbound column with the Name (ParmName) for the user. I searched the foreign value in the datatable and retrieved the information. I set the Value of the cell in the Datarow. All works well, but does not display. The cell accepts the value...I can even Debug.Print the values to the console. They are there just nothing displaying in DataGridView. Nothing odd about DataGridView. Should be straight forward...
My Code
,
Dim dtParm As DataTable = MyDataSet.tblParameter
Dim dgv As DataGridView = Me.dgvResultNum_DataGrid
[code]....
Sort DataGridView Numbers (when Clicking The Datagridview Column Header Text)
Mar 11, 2010A datagridview is sorting numerical values (when clicking the datagridview column header text) in the wrong order based on the initial digit:
[Code]....
Sort Not Working Datagridview Gives "DataGridView Control Must Be Bound To An IBindingList Object To Be Sorted?
Dec 4, 2009I have a few classes, one is a form, the other is the source of the datagridview. I want to be able to sort the columns of the datagridview by clicking on the header. Here are the classes that I am dealing with:
Imports DiscoveryByte.AddTools.Misc_Tools
Public Class ViewDiscoveryFlashCards
Private DBBindingSource As New BindingSource
[code].....
DataGridView - Group The Displayed Data Of The DataGridView By The Primary Key Of Both Tables?
Jul 20, 2011I want to see if anyone has used one table that has a primary key (not displayed) in the DataGridView. Then use a text box on the same form to call and group what if viewed in the DataGridView table. I want to group the displayed data of the DataGridView by the primary key of both tables.
View 1 RepliesDataGridView - Nonvisible Rows Are Still Visible And The DataGridView Is Empty Despite Having A DataSource
Jul 30, 2009I have several problems with rows in a DataGridView. Background information: The DataGridView (DataGridViewCalib) is in one TabPage of a TabControl, some columns of the DataGridView are automatically DataGridViewCheckBoxColumn as the DataSource have some colums which are Boolean. This is a Windows Form written in VB.Net with Visual Studio 2008. The user loads an input data file.
The problems:
1) At first arrival in the TabPage, ShowDataGridViewCalib (code below) is called. All rows are then shown in the DataGridView, despite the code saying that some rows should not be visible. Breakpoints in the code show that the code do arrive at the Rows.Visible = False events. Despite all rows beeing shown a Watch in the debugger shows that:
[code]...
There are two alternative ways of handling the rows in the code. The first attempt (commented away here) is probably the "nicest".
Datagridview In Application - Datagridview Should Display According To The Windows Screen Size
Nov 2, 2009Using VB.NET 2008. Am using Datagridview in my application, Datagridview should display according to the windows screen size, Before I used vb6
code.
Private Sub Form_Resize()
On Error Resume Next
[CODE]............
Am new to vb.net, How to set a datagridview size according to windows screen size, In Datagridview property itself any option is available or i have to make a code as like vb. If i have to make a code, how to give form_resize in vb.net.
How To Make A Combox In A Datagridview Change Output In Textbox In Same Datagridview
Jan 29, 2010I am using VS2008 and I have a form which has a datagridview. This is for an invoice where I already have the user select the customer from a details view and want to have the items in the datagridview change based on what the customer selected. Then when the item is selected I want to have the price change accordingly.
So far I have the customer selction as well as the item combobox(not limited to cust items yet) appear, but I cannot figure out how to get the join of the 2 items (cust+item as the price varies from cust to cust) to change the price. Question is, is it possible to do this in the same datagridview, or should i try to just break this down some other way?
VS 2008 DataGridView Cell Validation - Allows The User To Exit Out Of The DataGridView Changes
Nov 6, 2010I have a DataGridView where Cell_Validating is being done. I have a Cancel button on my form that allows the user to exit out of the DataGridView changes. The problem is that if a cell was currently flagged as in error, I cannot exit and remove columns from the DataGridView. I get the following error: Operation did not succeed because the program cannot commit or quit a cell value change. Is there a way to cancel the validation once the focus has been removed from the DataGridView? Here is my Cell_Validating
[Code]...
Multiple Rows Selection From One Datagridview To Transfer To Another Datagridview?
Jul 10, 2010In VB.NET 2008 I've two forms 1 & 2 containing two datagridviews connected to two data source 'ACCESS 2007 tables' Now I want to select multiple rows from one datagridview (form1) & transferring these to another empty datagridview (form2) with a button_click.
View 3 RepliesTransfer All The DataGridView Rows From From2 To Another DataGridView Of Form1?
Mar 13, 2011I have 2 forms, each one with a datagridview.I want to transfer all the DataGridView Rows from From2 to another DataGridView of Form1. but it's not possible.
[Code]...
Using A Datagridview To Update A Database And The Datagridview Is Bound To A Bindingsource
Dec 12, 2010If using a datagridview to update a database and the datagridview is bound to a bindingsource which has its datasource as the table to be updated: where dshould you place the tableadapter.update(mydatarow)
View 5 RepliesVS 2008 Datagridview - Pass The Value From TextFname To The Datagridview Column1
Oct 4, 2010I am making a simple program.. i have a Form named frmmain that contained datagridview control named DataGridView1.. and another form named frminsert that contains two textbox controls named txtFname and txtLname and Button control named btinsert.. I want to pass the value from txtFname to the Datagridview column1 and the value of txtLname to the Datagridview column2 when I click the btinsert.
View 5 RepliesDataGridView Binded To DataTable - Now Sorting DataGridView?
Jan 20, 2011At the moment I have a DataGridView (bindet to a DataTable) and some labels. If DataGridView's event SelectionChanged occurs,the labels should be filled with the information of the selected row -> No problems.But if I sort the DataGridView and click on a row, the informations in the labels are wrong.
Event:
Private Sub DGVMain_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DGVMain.SelectionChanged
If DGVMain.SelectedRows.Count > 0 AndAlso Not Me.DGVMain Is Nothing Then[code].....
Get Datagridview Table Row When Datagridview Datasource Is DataTable?
Dec 8, 2010My application must display some data in Datagridview (status of COM ports communication) and i Used .mdb databases before for faster search and Datagridview update. How i understand Datagridview is importing data from DataTable and data in DataTable is imported from .mdb file, so i decided to make shortcut - stop to using .mdb file (data must be erased every time application start and it is useless make .mdb file and erase it every time, becouse it is increasing even when drop is used) and using only DataTable..
I want to row in Datagridview change it color to red when it's Collumn(6).text countains %error% string..
When Error in COM port is starting, i can fast find row in DataTable for that port and write information that Error accured for that port and DataGridview automatically updates:
Dim RRow as () DataRow
RRow = ds.Select("Port = 'COM3')
RRow(0).Item(6) = "Error Opening COM3"
Winforms DataGridView Select New Row On Sorted DataGridView?
Nov 16, 2011Alright I have a DataGridView, where the user can click on the column headers to sort. When they add a new row while a sort is applied, the record isn't created until the moment they validate the row(which they cannot do till they exit the newRow). How can I make the row be selected once it is sorted?The DataGridView is databound.The selection mode for the grid is full row.I'm using VB.NET with SQLite database backend.I suspect I need to use the RowsAdded event, or DataBindingComplete events. The records in question do have a unique GUID attached but it is NOT visible in the DataGridView.
View 1 RepliesVS 2010 - Datagridview - Rows Cannot Be Programmatically Added To DataGridView's Rows Collection When Control Is Data-bound
Sep 13, 2011I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."
View 2 RepliesAdd To Bound DataGridView From Unbound DataGridView?
Oct 23, 2010I am trying to transfer the entire contents of an unbound datagridview (excluding the headers) to the next row of a bound datagridview. This is what I have so far but I'm not sure if I'm on the right track or not.
vb.net
Dim rowcount As Integer = dgv1.Rows.Count
dgv2.SelectAll()
[code].....
Create A New DataGridView Control For Each New Row In Another Datagridview?
Sep 24, 2011I have a DataGridView control (DataGridView6) that displays a list of managers. I want to generate a new DataGridView everytime I add a new manager to the list and put it in a specific place on my form.
EDIT: say if i have a main datagridview, and i want to add another datagridview of the same size directly below it, how would i achieve this using the event handler method described in your answer below? im not sure if this is the most efficient way of displaying new members in the program though...
