I'm trying to create an array of DataGridView rows using this
Dim rows As DataGridViewRow() = Nothing
Me.DataGridView1.Rows.CopyTo(rows, 0)
But it gives me this error:
Value cannot be null.Parameter name: dest
I 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 RepliesI have a databound datagridview.I have disabled automatically adding new rows to the grid. The datagridview is bound to a datatable.In it,I have also set the Protected Overloads Overrides Function ProcessCmdKeyto handle and process the 'Enter' keypress.When the user presses Enter within the Datagridview,I want the grid to add a new single row to the bottom of the grid.I have tried several methods to do so,but the grid always adds the new row to the top of the grid instead of to the bottom.I tried posting this issue in the Windows Forms Data Controls and DataBinding board, but didn't recieve any help there, that's why I'm posting this here instead.The only person to help me there said she couldn't reproduce my issue, even when I supplied her with the exact code I was using.I believe there is more than one way to implement this adding of a new row to a datagridview programatically, and browsing through the various msdn forums, I came across several and tried implementing them all, always with the same result.I don't remember all the various implementations I have tried, but here are my few most recent ones:(This is within a class I created that inherits the datagridview. This custom class was the only place I could specify the ProcessCmdKey function, it doesn't work in an instance of the datagridview instantiated directly onto a form. That is why I'm using the me keyword to refer to the datagridview)#1)
If keyData = Keys.Enter ThenMe.Rows.Insert(Me.RowCount(), 1)Return TrueEnd IfReturn MyBase.ProcessCmdKey(msg, keyData)
#2)If keyData = Keys.Enter ThenMe.Rows.Add()Return TrueEnd IfReturn MyBase.ProcessCmdKey(msg, keyData)#3)If keyData = Keys.Enter ThenDim row As System.Data.DataRow = dt.NewRow()dt.Rows.InsertAt(row, dt.Rows.Count)Return TrueEnd IfReturn MyBase.ProcessCmdKey(msg, keyData)
Can anyone tell me why "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound." I keep getting an error "Invalid Operation Exception was Unhandled" error. All I am attempting to do is allow the user to select products from a list(or a second datagridview) and have it added to the datagridview so they do not have to type in every cell since the other cells are not visible because they do not purtain to their needs. Plus they will be able to save all items at the same time.
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Im a newby in creating programs using vb.net. Currently 'm creating an program that will display array data to datagridview. Can somebody help me how to do it?
View 3 RepliesI have a datagridview extracted from a csv file. It displays duplicate rows. How can I delete those duplicate rows from the datagridview? replies would be precious.
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I have a datagridview and im using this code fill the table from a txt file.
Private Sub PopulateDataGridViewFromTXT(ByVal SFileName As String)
'Variables to store the count of rows and columns
Dim nRows As Long
[code]....
All that long list(more than 2000items) is loaded into my datagridview which have two columns named "ITEM" and "ID" With the code above the item from the id is splitted to each seperate column.I want to press a button and filter the table to show only swords for example or only spears.And the other thing is to make a search button to search for a specific item,which i suppose if the first thing is doable the second will be peace of cake..
on my form i have a GridView with add/edit/delete rows disabled, i need it to show blank rows for the unused size rather than blank background.
View 1 RepliesI am trying to insert an initial line (0) into a datagridview (named params). The program will then read each cell in that row, pass them through a function and return values be placed into the next line (1). This will continue until one of the parameters reaches some set point. The problem that I am having is that when I try to insert a new line, it appears above the initial one and not below it like I would like it to.
Here's my code so far:
Private Sub HurricaneWinds_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim init_xrange() As Double = New Double() {0.0, 0.0, 0.0, 40.0, 0.0}
For i As Integer = 0 To 4
params(i, 0).Value = init_xrange(i)
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My below is not an error. It just I need an alternative way of doing thing. I have a DataGridView which has a DataSource of DataTable on a Form. In this form, I have a 'Remove Selected' button which will remove all selected rows in DataGridView. And another 'Remove All' button which will remove all rows in DataGridView regardless of rows selected or not.
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i am trying to delete specific rows in a datagridview that start with a specific falue. What i have so far is
Dim rows As Integer
rows = Me.DataGridView1.Rows.Count - 1
For count = 0 To rows - 1
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Now this code works if one row meets the criteria but when multiple rows have the same value i get the following error.
I have a datagridview on my desktop application, what I need is to show in a a textbox the sum of collums values, of rows selected manually. Is this possible?
View 4 RepliesI generated columns from database and getting cell values from database too. my problem is that for some columns I have to generate checkbox in each cell at runtime.I m using visual studio 2010.
View 2 RepliesWhy doesn't this work?:
Dim sarray() As String = Nothing
Dim inc As Integer = -1
For each something in something
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how to Disabled Specific Rows in DataGridView using visual basic 2010
View 8 RepliesI need to dynamically create some sort of 'table' on my form. It should look like:
PIC1 INTEGER1 TIME1
PIC2 INTEGER2 TIME2
PIC3 INTEGER3 TIME3
On top of that it should look like a table and have gridlines between the 'cells' containing the picture/data, which makes it even more difficult for me. Before, control arrays were quite simple in VB6, but I've been searching for 1,5 hours now and I can't figure out how to do this in VB.NET 2010. Any idea how to tackle this the most efficiently?
How can I make a control array? Or the equivalent.
I am used to Visual Basic 6 which presents the option of whether to create a control array when I copy and paste and control.
How would i delete only the successful inserted rows for insert and then move the non successful rows up and allow the user to correct the data and get it ready for an insert. If i dont delete the successful rows then i will have multiple inserts of the same dataRow and we dont want that! AND if i dont move the data up then it will have blank rows uptop and will end the try and not insert the corrected data. You can better see what logic i am trying to perform at the bottom of my code, right after I insert into the database. Here is my code.
Private Sub btnLaserGenerateTicket_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLaserGenerateTicket.Click
'Function declarations
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I need to create multiple splitters, then getting that data and adding it into a DataGridView;
AAL1238:KSEA:KORD:1:1492.9:SEA;
AAL782:KSEA:KORD:1:1492.9;
AAL1848:KSEA:KORD:1:1492.9:;
AAL1360:KSEA:KORD:1:1492.9:;
AAL1804:KSEA:KORD:1:1492.9:;
AAL6796:KSEA:KLAX:13:830.785:;
The First Splitter will be a ':', then the next one will be a ;. Per each line up there, I need to add that content into a row into a datagridview, So if you were to look at the datagridview, It would look like that data above exactly, But separated into the correct columns.
How would i delete only the successful inserted rows for insert and then move the non successful rows up and allow the user to correct the data and get it ready for an insert. If i dont delete the successful rows then i will have multiple inserts of the same dataRow and we dont want that! :) AND if i dont move the data up then it will have blank rows uptop and will end the try and not insert the corrected data. Here is my code.
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'Invoice Form
Dim daInvoice As New OleDbDataAdapter()
Dim dsInvoice As New DataSet()
Dim MyDataTable As DataTable
[code]...
Error...
Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound.
how to add Rows programmatically to the DataGridView's rows collection when the control is data-bound? here is my code but i got error as "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound? "
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I have been having major problems with Datagridviews and attempting to retrieve one row at a time and then assigning that row to an array , Which can be used in another function.I have tried numerous ways to achieve this but none of them seem to work. something like 'Start array of no values to be filled during the while.
dim myArray as Array
While myDataGrid has Rows
assign myArray the values held within the cells of the first row
send myArray to another function for processing
END WHILE
I have a datagridview, and I want to get an array of rows, or rows indexes in which boolean column "Aktywny" is set to True.Obviously I can Do it using loop, but LINQ will be much faster for sure...
View 1 RepliesI have a large text file that I am going to be parsing. Each line can contain a variety of Specific Variables.
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I have three sub tables that I want to process. For each I want to combine the rows, as they are only different by contents in the second column(I want to do the same to the fourth column, later):
'Sub table 1
xx|C201 |02300877 |Samsung |....
xx|C201 |02300877 |Toshiba |....
xx|C213 |02300877 |Samsung
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p.s. For the fourth column, Manufacturer information , I want to do the same and I'd probably get something like this for the final table:
xx| C201,C213,C606,C619 |02300877 | Samsung
xx| C201,C213,C606,C619 |02300877 | Toshiba
xx| C303, C305,C712 |02301163
xx| C207, C209, C708 |02301165
please tell me what is below code doing? is it creating array with two values or its creating to string index which will take value later? [code]
View 4 RepliesIt was even difficult coming up with a Question title for this.
Am not sure whether am using the right approach to my problem. See i have this datagridview that contains rows that i would like have saved back into the Database as new rows but with a column altered to a new value.
Eg
PKColumn1 FKColumn2
Column3 Column4
1 1
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What am looking at is Change FKColumn2 (some foreign key, maybe i can also have a combo box somewhere on the form and an "import to") values to something like 2 and save the rows back to the database without loosing the original rows.
I 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:
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There are two alternative ways of handling the rows in the code. The first attempt (commented away here) is probably the "nicest".
My DataGridView sorts by date. For grins I entered the date 11-02-2010 fully expecting it to be at the bottom of the list, not listed right after the last 11-02-2009 row and before the first 11-03-2009 row.How do I handle this so that come January 1, I won't see all the 01-01-2009 rows listed first followed by the 01-01-2010 rows then the 01-02-2009 rows, etc?
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