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'm trying to get my head around excel charts. I've poured over these posts for the last couple of days now and i'm coming up dry. I've got a xl file thats got some data in the first 2 columns. I want to put the data in an XY scatter plot. Column A is the x coordinates and b is the Y.[code]...
View 6 RepliesOkay say we have a class that implements INotifyPropertyChanged and a property that has code in the setter to raise the PropertyChanged event. On the GUI side we have a text box with the code:
txtFirst.DataBindings.Add("Text", p, "FirstName", True) Where p is a Person object and FirstName is the property that raises the PropertyChanged event.
[code].....
We have an item cull that retrieves items and their appropriate data from one server. Their Primary Keys need to be INNER JOINed with another table. However, the second table is on another server. We can retrieve that data using a separate select statement and accompanying VB objects.
How would one go about this programmatically in VB? Is a loop the best practice available? Although we are in a Microsoft Ecosystem, Server Linking is not possible.
I need a way to programaticaly block and then later unblock specific websites based on their domain names. I only need to block browsers (so http & https would be sufficient, I guess?) but not just Internet Explorer, it should also work for anyone trying to run Chrome or Firefox too.
View 4 RepliesI am programmatically updating some columns in a datagridview. When the user has also updated some columns then my program generated changes are also saved to the database (MSAccess). If the user does not update a dgv column, my program edits are not saved. I have read in another posting somewhere that I should be updating the bindingsource rather than the dgv cells. I have some code that was attempting to do this but it doesn�t work.
Dim dvr As Data.DataRowView
With TblClassMembersDataGridView
.EndEdit()
.CommitEdit(DataGridViewDataErrorContexts.Commit)
[code]....
PS. Is the bindingsource in a on-to-one relationship with the table returned by the Fill method? If not, I can see one obvious error.
I can edit the values in the dgv cells manually, add rows, delete rows all without problem and then update the database.My problem is in one form where I want to allow the user to filter the rows in the grid and then enter a value in a textbox and programmatically update all the cells in one column with that valueI can update the rows, and see the changes in the datagridview. When I try and update the database (using UpdateQuery on the underlying TableAdapter of the datagird) only some of thechanged rows are being updated I though it might be related
View 9 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 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 ?
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 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 Repliescopying a datagridview's row to another datagridview. This would include the row's cell's contents also.
View 10 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 RepliesI am using .net 3.5 and vb.net 2008 I have a program that copies access databases (.mdb) over from one server to another to be used ofr a ArcGIS webservice. The databases are edited on one server then nightly copied over to the webserver so they can be consumed in an intranet page).
The program is just a windows form that runs copy command in the load procedure. The program itself is run form the scheduler as an admin user for the machine but no one is actually logged in when it runs at 1 at night. I then get this kind of error reported to me:
[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.
Thought I'd see if Stack overflow is quicker than me testing something while I get a thousand interruptions from other work :)
I'm updating an old VB net application and trying to refactor some of the logic as I go. The app looks for data from a single date across a few tables and writes that view to a file.
Writing the query in SQL I'd get the equivalent of
SELECT * FROM table
WHERE CAST(FLOOR(CAST(table.date AS float))AS datetime) = '15-Jul-2010'
Ideally I'd use
SELECT * FROM table WHERE date=@input
and add a date object as a parameter to a System.Data.SqlClient.SqlCommand instance
Are those two comparable? Will I get the results I expect?
Is there a way to convert a DataGridViewRow object to a DataRow object?
View 2 RepliesIT STILL GIVES A MSGBOX IF I SELECT THE CHECKBOX BOX OR NOT ....My code below will redirect to Google in both conditions: If the user selects the checkbox, then it will redirect to www.google.com, but if a user forgets to check the checkbox then it shows the msg box with an ok button. When I click on ok it should redirect to www.google.com
I want When a user forgets to check any of the checkboxes to show a msgbox with an ok button and stay on the same page. Otherwise if user selects any of the checkboxes then redirect to google
[code]...
i am trying to auto select the email value from a 2nd cbobox when the user selects a name from the first cbobox using the first cbobox's index. (the values all line up with each other just fine)This is my current code:
Private Sub cmbAnalyst_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbAnalyst.SelectedIndexChanged
theAName = cmbAnalyst.Text
[code].....
I have two drop down. SelCurrentManuf and selCurrentModel. I want the option in selCurrentModel to change depending on the option selected in selCurrentManuf. How do i do it?
<asp:DropDownList runat="server" ID="selCurrentManuf"></asp:DropDownList>
<asp:DropDownList runat="server" ID="selCurrentModel"></asp:DropDownList>
This is how i am currently populating selCurrentModel
Public Sub PopulateCurrentModel()
Dim mySelectQuery As String = "SELECT * FROM Model where ManufID = "+ selCurrentManuf.Text+";"
Dim myConnection As New MySqlConnection(Session("localConn"))
[Code]...
but it only populates the first selected manuf, and doesnt change after
Private Sub selCurrentManuf_SelectedIndexChanged(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles selCurrentManuf.SelectedIndexChanged
PopulateCurrentModel()
End Sub
