How To Select Objects In DataGridView
Jul 25, 2010The code below works perfect only when I don't use access as datasource how come?
Dim
tForm = New plannerVaganza()
tForm.ShowDialog()
Dim startIndex
As
Integer = 0
[Code] .....
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.net - LINQ Sample: Select Typed Objects From A List
Jul 7, 2011I have
Dim objectsList as List(Of Object) = GetAllObjects()
' Filter from Objects just Persons '
Dim peopleList as List(Of Person) = ???
What is the most efficient and effective LINQ expression to do it?
EDIT
1 Dim selectedObjects As List(Of Object) = GetAllObjects()
2 Dim selectedPeople As IEnumerable(Of Person)= selectedObjects.OfType(Of Person)
3 Dim people As List(Of Person) = selectedPeople.ToList()
Error on 3:
Value of type
'System.Collections.Generic.List(Of
System.Collections.Generic.IEnumerable(Of Person))' cannot be
converted to
'System.Collections.Generic.List(Of Person)'.
Select Object Member From Combobox List Of Objects
Nov 16, 2011I have a combo box that is populated with a list of objects (corresponding to all employee rows from a database that meet the criteria IsTech). These are not entity objects though, I have created my own class that stores the member values of each row from the DB. I have set the DisplayMemberPath to EmployeeId so the Combo box display the EmployeeId ( an integer ) member of my object. Ie. right now there are only 2 IsTech employees in my DB so the combobox displays the numbers 3 and 8 ( their EmployeeIDs).
[Code]...
.net - Can The Select Extension Method Project To A List Of Instantiated Objects
Mar 24, 2011I have two lists declared as follows:
Dim lstDBItems As New List(Of DBItem)
Dim lstAppItems As New List(Of AppItem)
I am trying to do something like this:
I've a function which returns List(Of AppItem):
Function GetAppItems() As List(Of AppItem)
'...
End Function
In the above function I populate lstDBItems and then write the return statement like follows:
Return lstDBItems.Select(Function(x)
dim oItem As New AppItem()
oItem.Property1 = x.DbProperty1
[Code]....
The weird thing is the code compiles, but on rumtime I get a type case error.
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 RepliesControl Array Of Datagridview Objects?
Oct 13, 2011Migrating from VB6, a control array of flexgrid objects. Obviously flexgrid is not supported by VB.NET, so DataGridView objects have to be used instead. I tried this alternative to placing them in a list.
I have two DataGridView objects which share a lot of code as well as event handlers. They are named D1 and D2 and many properties, such as column headeders etc., are set at define time. The control array is simulated by passing the "index" and selected grid as parameters in subroutines. For example, the routine to fill the grids, is as follows.
[Code]...
Resize Various Datagridview Objects At Runtime?
Oct 14, 2011I'm trying to resize various datagridview objects at run time, using the following subroutine
Sub GridHeight7(ByVal grd As DataGridView, ByVal highest As Integer)
Dim jr%, w&
With grd
[code]....
It appears that that only the top property is passed to the subroutine, that is, rowcount and the others appear to have a value of zero. Using ByRef makes no difference.
.net - Binding A Collection Of Objects To A ComboboxColumn In A DataGridView?
Jan 24, 2012I have a GUI which allows the user to select a report to view/edit. When the user selects a report, it shows the Items in the report. The Item has many properties - most of which are binding properly. One of the properties is Owner, and this is bound to a ComboBoxColumn.
Report
Items
Owner
I have done something very similar to this a few times and had no problems when I set the DataPropertyName, DataSource, ValueMember, and DisplayMember. The only difference is that this time instead of the Item type having an OwnderID it actually has an instance of the Owner object.giving the items bound in the list a self-referencing property that allows them to return themselves for the purposes of setting the ValueMember.However, When I bind it this way:
OwnerColumn.DataPropertyName = "Owner"
OwnerColumn.DataSource = ownersBindingSource1
OwnerColumn.ValueMember = "Self"
OwnerColumn.DisplayMember = "OwnerName"
I get a lot of errors like: Unable to cast object of type 'System.String' to type 'Owner'.
and:
The following exception occurred in the DataGridView:
System.ArgumentException: DataGridViewComboBoxCell value is not valid.To replace this default dialog please handle the DataError event.I was able to get around some of these errors by binding it like this:
OwnerColumn.DataPropertyName = "Owner"
OwnerColumn.DataSource = ownersBindingSource1
and also by making the ToString function on the Owner display the OwnerName property. This seems pretty hacky though - and I think I'm misunderstanding something fundamental as it still does not function properly.
Binding NHibernate Proxy Objects To A DataGridView?
Jan 22, 2012I am attempting to bind objects pulled from an NHibernate session to a DataGridView and am having problems.I have a single session in which I fetch all of my "look-up" items that are bound to a combobox column, and then I query for the objects themselves. omehow, this still results in proxy child objects on the main objects. I have even changed the mapping of the look-up items to eager fetch, but I still get proxies somehow.Here is how I am fetching the objects:
Dim _makes As IList(Of Make) = session.QueryOver(Of Make).List
Dim _models As IList(Of Model) = session.QueryOver(Of Model).List
Dim _cars as IList(of Car) = session.QueryOver(of Car).List
[code].....
Entity Data Model & DataGridView - Creating New Objects?
Mar 30, 2010I'm pretty new to the EDM, so bear with me. I have a windows form that has a DataGridView on it that's bound from the EDM I created. I figured out how to update my changes fine, but it's when the user creates a new row that I'm having a problem.I tried numerous ways and many google searches, but came up with nothing so far.
[Code]...
Error (occurs when calling _Context.SaveChanges()): Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. Refresh ObjectStateManager entries.
Forms :: Create A Dynamic DataGridView From A List Of Objects?
Feb 6, 2009I am relatively new to C# and winforms, although I have been using Java for years, so forgive me if im asking something relatively straightforward!I have a DataGridView, it needs to update regularly so I wish to provide a Collection of objects as its DataSource and NOT a database table.So far I have a List<MyObject> which will be constantly updated via a BackgroundWorker thread. I want my DataGridView to update when a change has been made to the List i.e. if the objects are resorted, added to or deleted from etc.Currently my DataGridView only displays the first object I add to the List, if I add more the DataGridView doesn't update to display the new objects added.This is a basic overview of how im coding it:
private List<MyObject> myList= new List<MyObject>();
myDataGridView.DataSource = myList;
Then my BackgroundWorker thread updates the list, e.g.
[code].....
Select Multiple Objects Like Checking Multiple Checkboxes?
Nov 24, 2010Is there a tool in the toolbox that i can use that replaces checkboxes. i have limited amount of space and checkboxes just keep taking up room. I need the user to select multiple objects like checking multiple checkboxes.
View 5 RepliesSelect A Row In Datagridview?
Aug 23, 2010I have form that has a datagridview (datagridview1), one textbox and one button. This datagridview shows data from an excel database. My table looks something like this.
[Code]...
Basically I will insert the order number into the Textbox and Click the Button. And I want the row of that order number to be highlighted in datagridview. For Example, I type in AC205 in the textbox and click button and the 3rd row in the above table gets highlighted.
Select Value In DataGridView?
Mar 11, 2010I use following codes to select data in ListView1, given value in textbox1.text. That codes work fine.
Textbox1 data is integer and DataGridView1 first Column Value is Integer. I want to locate this value in Grid. how to select data in DataGridVeiw, given data in textbox1.
Dim itmX As ListViewItem = ListView1.FindItemWithText(TextBox1.Text, False, 0)
If Not itmX Is Nothing Then
itmX.Selected = True
[Code].....
.net - DataGridView Row Select Without RowHeaders?
Sep 25, 2010How do you select the whole DataGridView row on cell select and disabling the selection of a single cell
NOTE: just like the behavior of a listview
Datagridview Select Row And Column?
Jan 8, 2009I has a datagridview and now I would like to determine that whether column1 in row 1 is selected by the user.What should I write to do so?
Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
[Code].....
Getting Datagridview Cell Select?
Feb 20, 2012I'm using a search code using a textbox then it lists the record on a datagridview if search is successful. After the search, the user could select the record on the dgv in which later on can be edited or deleted. Edit and delete button is disabled when nothing is selected on the record. What I want to know is how to trigger an event to make those buttons to be enabled when a record is selected. By the way my datagridview is connected to my textboxes. My question goes something like this, but this is totally wrong.
dgvStud_CellClick = Nothing then
btnEdit.enabled = true
btnDelete.enabled = true
End If
How To Select Item From Datagridview
Jun 10, 2009when i click an item in my datagridview, how can i get the item value?i thought datagridview.item would give me that.
View 5 RepliesSelect A Particular Datagridview Cell?
Jul 24, 2010i have a datagridview of four columns, i'd like to enable the selection of just one column and disable the rest.
View 5 RepliesSelect A Row (or Cell) In A Datagridview
Jan 23, 2007Im having a little trouble setting focus on a row in a datagridview. When a user presses the Enter button in my datagrid, a sub is called and the window is closed. Now next time i display the window, the selected cell has moved one row down. This is because when you press enter in a datagridview it jumps to the next line (wich i really dont want it to do). Now then in my forms shown event i placed the code: Datagrid.rows(0).selected = True Now this highligts the first row when the window is displayed, but when you press the down key, it jumps to the third row, because even though the first row is highlighted, its the second row who has focus (because it jumped their after pressing the enter key) How can i set the focus on a specifik row in the datagridview in vb2005?
View 3 RepliesSelect All Cells From Datagridview?
Mar 4, 2009I want to select all cells from datagrid for doing futhur operation. I had use following code but it read only one selected data from datagrid .
DataGridView1.SelectedCells.Item(0).Value
read all data from datagrid cells
Select All Rows From Datagridview
Jan 14, 2011how to get all rows in a datagridview values and pass it to new access database in vb format?
View 10 RepliesSelect CheckBoxCulomn From DataGridView?
Dec 20, 2009I Want insert Datas from DataGridView (first) into DataGridView (secend) While i select CheckBoxCulomn from DataGridView (first) Row to Row.
View 9 RepliesSelect Column In Datagridview?
Jun 22, 2010How to get all data in a selected row in datagridview ?
View 1 RepliesSelect Items In A Datagridview
Nov 10, 2009how can i find the item or column in a datagridview..
View 1 RepliesSelect Text From Datagridview?
Jul 14, 2010How to write a code to get data from selected row in datagridview and put in separate textbox.
View 12 RepliesVS 2005 - Trying To Select Row In DataGridView
Sep 15, 2010I have a datagridview control on a form that I'm trying to select programmatically. My problem is, it's selecting the row in the grid when I use
Datagridview1.rows(Index).selected = True
However there is a margin on the left side of the datagrid that only get's the focus (or the little triangle identifier) when I click the row with my mouse. How I can have this row fully selected using code. When I try to run another function of my form it's crashing because the datagridview is not fully selected.
VS 2005 : Select 1st And 5th Row In Datagridview?
Jun 25, 2009how to select 1st and 5th row in datagridview
View 8 RepliesVS 2005 Select Value In DataGridView?
Jan 4, 2010I use following codes to select data in ListView1, given value in textbox1.text. That codes work fine.Textbox1 data is integer and DataGridView1 first Column Value is Integer. I want to locate this value in Grid.My question is how to select data in DataGridVeiw, given data in textbox1.
Dim itmX As ListViewItem = ListView1.FindItemWithText(TextBox1.Text, False, 0)
If Not itmX Is Nothing Then
itmX.Selected = True
[code]....
VS 2008 DataGridView Row Select?
May 23, 2009Is there a way to manually select a row? Right now, it uses the default selection method where when you left click it highlights the row, but I would like it so when your right click on a row it also selects the row, because I would like that row to be active when the row is right clicked, and not just left clicked.
View 6 Replies