Datagridview Beginedit Don't Work?
Jul 21, 2010Private Sub dgvfeljegyz_CellParsing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellParsingEventArgs) Handles dgvfeljegyz.CellParsing
'dátumellenőrzés
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Beginedit Method - No Row At Position X?
May 4, 2012I'm making a form that's supposed to update the table in another form's datagridview. I'm trying to use beginedit but it throws an exception that doesn't make sense to me.
BookCasesDB_dataDataSet.Books.Rows(frmLibrary.dgvBooks.CurrentRow.Index).BeginEdit()
BookCasesDB_dataDataSet.Books.Rows(frmLibrary.dgvBooks.CurrentRow.Index).Item("owner") = cboOwners.Text
BookCasesDB_dataDataSet.Books.Rows(frmLibrary.dgvBooks.CurrentRow.Index).EndEdit()
The code stops at the first line, saying that the row in question doesn't exist. Except that I know it exists, because I selected it before coming to this form. Is there something I'm missing?
GetChanges() Doesn't See Changes Made Using BeginEdit And EndEdit
Mar 5, 2010GetChanges() doesnt see changes made using beginEdit & endEdit?The data is bound is also bound to a DGV and when I edit there "manually" by entering cell and call GetChanges() it works correctly.
'Does RateType already exist in table?
For Each row In dsRates.dtValidLaneRates
_tableID = row.tableID
If row.RateType.Contains("Default Rate") And _
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Can't Get DataGridView To Work?
Dec 7, 2009I am trying to put in a datagridview in my program, and when I add the connectionMiscrosoft SQL Server Database File as the data sourceand i have a .mdf file for the database..when I click OK it says it couldn't login my computer account, i tried putting my login name and password, and it still didnt work.
View 1 RepliesHow To Work With Datagridview
Sep 13, 2009I have a datagridview to show the database data in order to let the user view the data. But i am thinking of adding a checkbox column to the datagridview and when the user selects on the checkbox in the datagridview on a particular row, he can actually delete that row when he checks the msgbox are you sure you want to delete this?
I am also not sure on how to provide the provision for user updating through the datagridview. If he can update through the datagrid view and press the save button, and the database is updated, it would be better.
Currently i wrote the code for the inserting of data already . But i am stuck at the deleting and updating of data through datagrid view. the below is my code for inserting of data
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.net - Datagridview Doesn't Work
Sep 13, 2010Possible Duplicate: Datagridview doesnt work! I have written code to show records in a datagridview but it shows nothing. I have tried to debug & when it step into GetData function following codes
Catch ex As Exception
returnData = Nothing
If connection.State = ConnectionState.Open Then
connection.Close()
End If
become gray & it shows error sign. When I take my mouse pointer on it it shows message. It says "Cannot open database SUIMT requested by the login. The login failed. Login failed for user 'MY-PCJames'".
Imports System.Data.SqlClient
Public Class Form34
Private Const ConnectionString As String = "Server=.SQLEXPRESS;" & _
"Database=SUIMT;Trusted_Connection=True"
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.net - DataGridView Sort Does Not Work
Nov 9, 2010Visual Studio 2010 VB.NET
I have a DataGridView.DataSource set to a Collection of custom objects. The columns use read only properties from the custom object for display, this dialog is for display only. The properties all return String objects. I set the columns all but 2 of them to sortmode automatic (the ones that are not set is a button or a checkbox). Yet it does not sort. I have googled around and most people use sql or binding sources but I am using a trivial vb collection. Some say I should implement IComparable but isn't String already IComparable?
Per a request here are some code snippets.
This method defines the columns in detail from columns I designed in the designer.
The column names are called pSelected or pCustomer and corresponds with a property by the same name that the column definition ties to.
Protected Sub UpdateDGVUS()
If Not USColumnsInitted Then
USColumnsInitted = True
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Datagridview Alignment Does Not Work?
Apr 22, 2010I'm trying to align datagridview columns at once to middlecenter. It works for the first column and does not for the others. I suspect it's a matter of the datasource property which is bind to a datatable which catches data from a SQL Server table. Below is my simple code and I thought that after this code runs I would have every column aligned to middlecenter:
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DataGridView Column Order Does Not Seem To Work?
Mar 10, 2009I have a DataGridView bound to a list of business objects:
Dim template As New IncidentTemplate
Dim temps As List(Of IncidentTemplate) = template.LoadAll
Dim bs As New BindingSource
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How To Work Create A Grid Using DataGridView
Jan 4, 2010I'm creating a program for a bookstore & I'd like to create an "inventory table" using the DataGridView function. I've created a form with 2 tabs for the bookstore clerk. I'd like to have a new row created once the information for a new book is entered.[code]
View 8 RepliesMS DataGridView.show Fails To Work?
Jun 23, 2010I used to have a single DataGridView (DGV) on a form. I formatted and populated this, then used DGV.Show to make it appear on my form. This worked fine.I upgraded my form, to included 2 DGVs. Within a sub I dim a new DGV, populate and format it as before then set this equal to whichever DGV on the form it's meant to be. For example:
Dim pDGV as new DataGridView
with pDGV
.ColumnHeadersVisible = True
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VS 2010 DataGridView To DataSet Won't Work
Aug 7, 2011I' newbie and i dont understand why this won't work TableName is String "Tab"DataGridMain is name of DataGridView.[code]
View 5 RepliesCell Click - Work With A Datagridview And Checkboxes
Jul 12, 2010I am working with a datagridview and checkboxes. Ok, I have the following code which runs without any errors but doesnt give the required results.
1) My problem is that, when I uncheck the checkbox in Cell 2, I want Cell 9 and Cell 6 to be empty.
2) When I uncheck the checkbox in Cell 2 and click any other Cell in the datagridview and check again checkbox in Cell 2 - it DELETES the data in Cell 9 & 6.
Now, when I check again the checkbox in Cell 2, Data is not populated in Cell 9 & 6 regardless how many times I try....
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Datagridview Column Restrictions Don't Work When Pasting
Apr 27, 2011I have a datagridview with 4 columns (bound to a datasource).The following code ensures only numbers can be typed in the first column, all but numbers in the 2nd column, and only letters in the 3rd and 4th cooumn. It also converts the input in column 3 and 4 to capital letters.
Private Sub validatekeypress0(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)
If Asc(e.KeyChar) <> 13 AndAlso Asc(e.KeyChar) <> 8 AndAlso Not IsNumeric(e.KeyChar) Then
e.Handled = True
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The problem I have is that the user still has the possibility to place restricted characters in a column by pasting them in (with ctrl+v or right click-->paste), because the keypress doesn't notice the pasting.What should I do to make it impossible for the user to use restricted characters? In other words, how can i check the text the user wants to paste in a cell (cause that's the only other way to input data I can imagine)
Getting BindingSource And DataGridView To Work In A Seperate Class?
Feb 19, 2010Basically I try to get a DataGridView and a BindingSource working inside a class. I define them by:
Dim TempDGV3 As DataGridView = New DataGridView
Dim TestBinding As BindingSource = New BindingSource
When I manually add columns to the DataGridView, it works perfectly, but when I set it's DataSource to a bindingsource from a base class, it doesn't load data and keeps throwing 'object does not exist' errors. The bindingsource mentioned here did, however, work on other DataGridViews that are defined in the base class (and implemented in the form to which the base class belongs)
Same for the BindingSource(not the above mentioned, but the one I try to create inside the class in the beginning of this post). I try to use it in the following way:
TestBinding.DataSource = TempDGV3
TestBinding.Filter = filterString()
SourceDataGridView.DataSource = TestBinding
But the BindingSource keeps returning 'Nothing' for it's datasource and basically doesn't work. However, the SourceDataGridView mentioned here gets filled with 63 columns with "AllowUserToAddRows" and other properties when the columns names are asked.
So my question is: how do I get the BindingSource and the DataGridView to work in this class? I'm getting the feeling I'm missing out on something very obviously here. If that's not the case, I can report back with more code?
Make Slow Datagridview Work Faster?
Sep 30, 2011I have a datagridview that takes time when loading, and once loaded, is also very slow when using the scroll bar to see the other rows.[code]..
View 12 RepliesDataGridView.CellFormatting Doesn't Work When Grid Is Sorting
Aug 24, 2011I have a datagridview control that where I need to color the rows based on a value in one of the cells in each row. I'm using the CellFormatting event like so: [code]This works fine when the grid loads and when I scroll it, etc. But when I click on the column headers to sort the grid, e.Row Index is always zero and all of the rows get the formatting of the first row..[code]For some reason, e.RowIndex is set correctly here but not on the other methods. The only thing you have to worry about here is it can be -1. But when I tried to use other methods, including PrePaint, I had to deal with it always coming up zero on a sort. If I exclude the zero case, like I excluded the negative one case about, then the first row is always white!!! I'm not sure why this works, but it does. It also produces no flicker beyond what I got using the CellFormatting event.
View 2 RepliesDynamically Created DataGridView Textcolumn Formatting Does Not Work?
Jan 8, 2010It is a few years later and the same issue pops up! The enviroment is 50+ dynamically created DGVs that work properly except for having to format the data supplied as the DataSource to the DGVs Alignment appears to work but formatting does not. The datasources are 1 of 2 sources. 1) a datatable from the program 2) a SQL database. If you format the datatables everything works well. The additon of ValueType had no effectdoes not work
Me.dgv.Columns(1).DefaultCellStyle.Format = "HH:mm:ss"
Me.dgv.Columns(2).DefaultCellStyle.Format = "N3"
Me.dgv.Columns(3).DefaultCellStyle.Format = "N0"
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Get This Error When Trying To Populate A DataGridView / A Try...Catch Doesn't Work
Sep 2, 2009I get this error when trying to populate a DataGridView.The last sentence of the error text says to handle the DataError event but I'm not sure how to do that. A Try...Catch doesn't work.
View 17 RepliesExpose DataGridView.Columns And Have The Column Editor Work Properly?
Sep 6, 2005I have a user control with an embeded DataGridView. I exposed the Columns property so that the columns collection could be edited in the visual designer:
View 2 RepliesVS 2010 Datagridview - Bound To A Local Databse Table Through A Linq To SQL Class - Adding Does Not Work
Sep 5, 2010I have a datagridview which is bound to a local databse table through a Linq to SQL class.
Everything works as I would expect, when the application runs, up to a point.
If, in the datagridview tasks pane I enable Adding, Editing and Deleting all work as expected.
If I disable Adding & Deleting, leaving Editing enabled, Editing works as expected.
If I disable Deleting & Editing, but leave Adding enabled, Adding does not work, despite the row for new records being displayed. I can move around the row but not enter data.
I suspect somehow its the datasource as opposed to the datagridview that is the cause of my problem but as I say, I can add rows if the Enable Editing option is selected.
Changing the relevant properties programatically makes no difference.
I've been searching for the reason for a couple of days without success.
I have a workaround, by leaving Enable Editing set and programatically setting each row during the RowPostPaint event to be readonly except the row for new records. I would just like to understand what is going on.
LINQ Group By Multiple Values Does Not Work Well But Work Well In C#
May 29, 2012I found that when group by multiple values does not work well with VB.NET, but it works well with C# ,here are my code, is there something wrong with my VB.NET Code? Here is my VB.NET code:
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PerformClick() Doesn't Work - How To Make It Work
Feb 2, 2011I have an application that requires data be entered, and after entering, a button is clicked to process that data. Clicking the button works just as it should--the data is processed properly. In constructing a test module, I provide a set of data values, followed by:
btnWhatever.PerformClick()
Nothing happens. I have used this syntax for years, and it has always worked flawlessly. I have triple checked everything else and isolated the problem to the failure of the PerformClick(). The PerformClick() is in a test subroutine that does nothing but fill textboxes and labels with default data, then calls the PerformClick() on the button to begin processing. Again, the button works fine, the data is entered as it should be, but the PerformClick() does not fire the click event.
VS 2008 Could Not Get Form To Work On Work Computer
Aug 21, 2009I have a form that works on my local Machine I created into. I have Office 2007 on this machine. I created the Form with the Excel 12 Reference. I move the Entire conetence of the Project folder to my work computer. Which has Office 2003. Do I need to recreate the form with the Excel 11 reference. I could not get the form to work on work computer. IT has a com error. I am acessing the EXE for the debug folder w/in the Bin Folder.
View 7 RepliesDB/Reporting :: Will SQL Statements That Work In Compact SQL Server Also Work In The Express Edition Of SQL Server
Jul 25, 2010will SQL statements that work in Compact SQL Server also work in the Express Edition of SQL Server?
View 2 RepliesWork Around For PrincipalContext If Has To Work With .net 2?
Jul 21, 2010Dim pc As PrincipalContext = New PrincipalContext(ContextType.Domain, GetPath) ADUserInfo.PasswordVaild = pc.ValidateCredentials(LoginName, Password)
View 1 RepliesError:Project Work On Seven System-Don't Work On XP System
Oct 19, 2011I'm using vb2008 with DB MSA2007 (save it to MSA2003) on Seven(7)System After I create my project I build it(make exe). then I took the file of project (application) and the DB from Debug Folder.
I tried to run this application with DB on another computer it's system is seven and MSA2007 and work very well. then I run it on pc it's system XP and MSA2003. it showed this error
Application Error THE APPLICATION FAILED TO INTIALIZE PROPERLY (0XC000135). Click on OK to terminate the application
EXE Program Don't Work Debudding Of Program Work
Jan 8, 2012I'm building a VB(2010) program to create the graphics for my laserprojector.The program works when I debug it in VB, but when I run the EXE program in the release directory, it doesn't work. The problem in the EXE program is theat I can't draw/view graphics in the picturebox..I coppied my whole program to a new VB project, but I'm having the same problem...In the original project, where the program works, there are no warnings or errors.
View 3 RepliesDataGridView 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
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