I want to copy a DataGridViewRow from DataGridView to another but when I try it I get this error:
InvalidOperationException: Row provided already belongs to a DataGridView control.
is there any other way to copy a DataGridViewRow ?
copying a datagridview's row to another datagridview. This would include the row's cell's contents also.
View 10 RepliesSuppose I have a DataGridView called gridFiles.
For Each row as DataGridView in gridFiles.Rows
MsgBox(row.Cells("somekey").Value.ToString)
gridFiles.Rows.Remove(row)
Next
I will see message boxes, but only for every other row. What I think is happening is that the internal pointer for gridFiles.Rows gets off, because there is 1-fewer rows on the next iteration.
Why does this work:
_dgvHistory = DGV.Rows
For Each row As DataGridViewRow In DGV.Rows
DGV.Rows.Remove(row)
[code]....
im adding rows to a datagridview and i need to get the valuof the last row in mydatagridviewi have the following code so far:
dim row as new datagridviewrow
If DataGridView2.RowCount > 1 Then
Dim myrow As DataGridViewRow = DataGridView2.Rows(DataGridView2.RowCount - 1)
[code].....
setting a DataRowView equal to my DataGridViewRow.DataBoundItem, then using the DataRowView.Row property (In my code below).
Here's my code:
Dim tblTemp As New DataTable()
Dim row As Windows.Forms.DataGridViewRow
Dim rowView As DataRowView
[code]....
i want to change the color of a new datagridviewrow based on a string.the string can have many differant values, but will ALWAYS be a color.
dim Colorlist as new list(of string)
Colorlist.add("Red")
Colorlist.add("Blue")
for each col in colorlist
Dim myrow as new datagridviewrow
[Code]...
I have a DataGridView that is bound to a DataTable thru the code. I want to be able to modify the data when a row is selected from the Grid. How do I reference that row of data from the grid so I can convert it into the DataTable row to be updated? I'm trying to do something like this:
Dim row as DataGridViewRow = DirectCast(dgvAddress.CurrentRow, DataRow)
This isn't working. I'm getting an error basically stating that I can't convert a DataGridViewRow into a System.Data.DataRow.
[code].....
tblProductsBindingSource, tblProductsTableAdapter I have delete the tblBindingNavigator,also my DataSet consist of 2 Data Tables namely tblProducts and tblChosenProducts, at this time tblChosenProducts is empty but has all the same Table Style of tblProducts. So at Form Load every things is working fine , what I would like to do is when I click in a cell of dgProducts (the DataGridView on my Form) is to populate my second Data Table(tblChosenProducts) and update it to the database(Invent_14April),
ublic Sub DgProduct_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DgProduct.CellClick
[code].....
I have been looping thru all of the rows in a DGV and matching a variable to a specific cell in the row to 'do stuff to that DGVRow.
For Each dgRow As DataGridViewRow In Me.dgvInsertCommercial.Rows
If dgRow.Cells("SomeColumn").Value = pid Then
'do stuff
end if
Is there a way to actually query or make a selection instead of having to loop thru all of the dgvRows?jfc
I have an unbound DataGridView control where I have defined the columns at design time.Currently to add a new row I use a like this:
gridname.row.add(value1, value2, value3, value4)
This offends my sense of good programming because if I add a column to the grid or change the order of the columns then I need to alter the line above. What I want to do is to create a new datagridviewrow complete with columns and then populate the values like so:
dr.cells("FirstName").value = value1
dr.cells("LastName").value = value2
dr.cells("Address").value = value3
Just like I do when editing an existing row in the grid.I thought I could do the following:
Dim dr as New DataGridViewRow
dr = MyGrid.RowTemplate
I thought this would give me a new row complete with cells but no values. Appartently this is the wrong property. Is there a property that will give me a blank row, but with the cell names/types that have already been defined in the grid defined in the row?Yes, I know I can take an existing row and just clear the values but when this program load, there are not always existing rows.don't tell me I am going to have to add the columns myself. dr.cell.add(cell definition)
How can I toggle the selection of a datagridview row?If I pick the Row once it should "highlight"If I pick the same row again I want it to "unhighlight"this is what I have so far in a mousedown event:
If
Selected_RowNM = Selected_RowNM_Temp Then
DataGridView1.ClearSelection()
End If
When I use a DataTable as a DataGridView's DataSource, I often have to find which row(s) a user has selected and read specific values from the DataTable (not the DataGridView). I wanted to know if there is any reliable way of determining which DataRow a DataGridViewRow is bound to especially when the user has sorted the DataGridView on a column other than the default order.
Currently, I use code of this sort:
Dim sorting = ""
If DataGrid.SortOrder <> SortOrder.None Then
'get the actual row if the results are sorted'
sorting = "[" & DataGrid.SortedColumn.Name & "]" &
[Code] .....
Is it possible to get the column names from a DataGridViewRow object?
View 4 RepliesThis works:
DataGridView.Rows.Add("Bla Bla Bla", value1, value2)
But if I do:
Dim newrow As New DataGridViewRow
newrow.SetValues("Bla Bla Bla", value1, value2)
If Not value1.Equals(value2) Then
[Code]....
the entire row is empty.
Why is the row full of empty cells?
Given the following code I get error
"Cannot bind to the property or column rname on the DataSource"
Public Class CustomerUpdFrm
Private RowPassed As DataGridViewRow = New DataGridViewRow ' Passed row variable
Private Sub CustomerUpdFrm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
[cODE].....
DataGridViewRow.IsNewRow property is set for the bottom (empty) row. If I set a cell value in the bottom row using DataGridViewCell.Value, IsNewRow remains set. What is the correct way to programatically set a cell value in the botton row to clear IsNewRow?
View 4 Replies1) Do you typically allow Deletions, Additions, and Edits in a DataGridView?
2) Have you found any simple way to use combos in a DataGridView? (See edit below.)
3) What type of binding do you typically use on a DataGridView? Do you manually code it? Bind it to an custom BindingSource object?
I'm accustomed to programming in MS Access and I'm now working on learning VB.NET. In Access I typically use updateable DataSheet view bound forms but this doesn't allow me to separate my business logic and create a Data Access Layer. Now I'm trying to figure out how to have an updateable DataGridView in .NET together with separate layers for Business Logic and Data Access. So far I haven't really been able to make sense out the many things I'm reading about this.
I need my DataGridViews to be easily sortable, filterable, and allow up to 10,000 records to be displayed at one time. I've achieved this using ADO.Net with standard DataTables (all written in code) but all my business logic and Data Access is in the code behind my form.
Edit:I guess I was under the impression that ComboBoxes are really difficult to use in DataGridViews so that's why I had posted question #2 above. I think I need to research this a little more as it's probably not as difficult as I thought it was but it doesn't appear to be anywhere as simple as a combo in MS Access. However, I realize that MS Access has many other limitations that VB.NET does not have.
I think I already know the answer to this, but I figured it would not hurt to ask.
Is there any possible way to nest Databound DataGridViews in .NET? What I would like to have happen is for each row in the DataGridView to have a button to expand, which would then give me a DataGridView underneath that. I would like this nested DataGridView to also be able to do this, so I could go n levels deep with them.
Is this possible with the .NET Winforms standard DataGridView? (Or another standard .NET control?) I have seen people reference some third party controls, however they are really expensive, and I don't really want to go that route.
I wrote a program using VB.NET. When I run the executable, it displays a DataGridView that may (or may not) have rows in it. The user can enter data, or hit an Update button to fetch data from a database. (The grid is NOT being used as a DataSource.)The user can also set the font with another button: DataGridView1.font = "..."
If the grid DOES have rows in it, everything works as expected and the font is used in the grid.If the grid does NOT have rows in it, the font does NOT change. Even after the user hits Update, or types in data.He has to entirely exit the program, and rerun it to see the font actually change.
Question: How do I set the font on the grid, regardless of whether it:
Has rows.
Doesn't have rows.
Will have rows later.
I would think DataGridView1.font would ALWAYS change the font. No?
I have an idea, but i am not sure how to implement it with code.I have an application where a user can view current bookings for rooms.I have two datagridview controls, the first one shows the rooms and the second shows all my current bookings.What I want to be able to do or more the user, is click on a room and the current bookings for that room (datagridview1) to be shown in (datagridview2).What I think I need to do is apply a filter and a sort in a sub routine, then link my tables with a binding source.
View 1 Repliesim searching the best way for Printing a whole form / Several Datagridviews and some Specific controll contents in my WindowsForm application.
I know the internet is full with bad and good examples. Its hard to separate the Good examples from the Bad examples.
I have two relayed tables (teams and players) and two datagridviews. In the datagridview1 i have a combobox with datasource <teams>.In datagridview2 i have a combobox with datasource <players>. In this combo i can see all players. I want to filter and see only the players related to the team of the combo in the datagridview1.
View 10 RepliesI have 2 forms (form1 and form2). I'm passing 2 numbers from form2 to form1 (see image/attachment). I want to make sure that 1 of those 2 numbers (passed from form2) aren't the same as any number on form1 in column2. For example, if I were to pass the numbers "2, and 3", the program should give an error saying, there is already 3 in column2. It doesn't matter if the first number (in column1) is the same, but the second number should NOT be a duplicate of any number in column2.
View 7 RepliesI am novice at best with VB. I have a dataset built from a complex query. Well I have a lot more items in the dataset than I wish to show in a datagridview. Some items will be used for other purposes at the time, filling txt boxes, dropdowns, etc...all independent of the dgv. I am lost at how to fill just a 3 or 4 of the items rather than just filling the entire thing. So, instead of just filling the entire ds into the grid, how would I fill in selected columns into the datagrid that has specifically named columns at runtime?
View 2 RepliesIn my project,, I have three forms. In my main form, I have a DataTable filled with some data from a MySQL-server.In the two other forms, I have a DataGridView which is bound to a BindingSource, which again is bound to the same DataTable in the main form. So It looks something like this:
Datagridview Datagridview
| |
BindingSource BindingSource
[code].....
I have a DataGridView that is bound to a list of objects called "BaseChange". The BaseChange objects are made up of 4 properties...
ChangeType
ChangeStatus
ChangeDescription
LastChangeDate
The datagridview has columns for all 4 values as well as a 5th (a checkbox column called "colIsSelected"). There is no problem binding the list to the grid and displaying the items. The problem is that the query that gets the selected items in the grid is giving me an implicit cast error when option strict is enabled.
This is the query...
Dim _changes As List(Of BaseChange)
_changes = (From _row As DataGridViewRow In dgvChanges.Rows() _
Where Convert.ToBoolean(_row.Cells(NAME_COLUMN_IS_SELECTED).Value) = True _
Select DirectCast(_row.DataBoundItem, BaseChange)).ToList()
...and it produces the correct results with option strict off. The implicit cast squiggle is on the "row As DataGridViewRow" code, and the full message is "Implicit conversion from 'Object' to 'System.Windows.Forms.DataGridViewRow'*".
If I exclude the "As DataGridViewRow" from the query, I get a late binding error on the _row.Cells and _row.DataBoundItem and this also fails option strict.I need this to work with Option Strict enabled, and in VB.
I have a datagridview with two columns; one named Names the other named Scores. This is my code so far Dim hScore As String() = New String() {strName, lblPercent.Text}
[Code]....
What I want it to do is sort the scores by greatest value to least value, but the problem I'm having is that the scores are stored as strings so they are being read and sorted from left to right. My question is, how do I store the scores in a numeric array and place them in the same row as the name, but in the second column? The names and scores only need to be stored as long as the program is running so I don't want to add anything to the registry or create new files to store them.
I have 2 datagridviews on my form. One lists products and when you click on a product in the first datagridview the other lists tests for the selected product. I have a products table with a productid,productname and productcode. I have a tests table with a testid and a testname and I have a prodtests table with a prodtestid, productid, testid and a few other fields.
Public Class frmProducts
Dim myConstr As String
Private WithEvents ProductBindingSource As New BindingSource
Private WithEvents TestBindingSource As New BindingSource
Private Sub frmProducts_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
Also I need to add a combobox column to the second datagridview that is bound to my prodtests table and to list the testnames from the test table in a combobox. In my save button, should I just call both adapter.update methods to save all changes. I will add the appropriate update commands etc.
VB 2010 form has 1 panel, 1 DGV in the panel, 1 TabControl with 3 tabs in the panel each tab has a DGV all 4 bound to the same DataSet through code.
I have a form that has multiple Datagridviews on it, 1 in the main portion of a panel and the other 3 in a tabcontrol. If I click on cell 0,4 of DGV1 cell 0,4 of DGV2 is also "hilighted" and the same goes in the reverse order. If I click on cell 1,4 in DGV 1, cell 0,1 is hilighted in DGV2 (basically it stays with the last selected col and what ever row for that DGV).
This isn't the functionality I'm really looking for here, when I single click or change cells on any of the DGV's I don't want any of the others doing anything.
As you can see there are 2 cells selected this was created by a single click in the 4th cell of Param0