I'm currently trying to work with the DataGridView object in Visual Studio 2010. Everything's going smoothly, except that I cannot figure out how to grab the currently selected index of a combobox on the datagridview.
View 5 RepliesI have a DataGridView on a windows form.
The 4th column is a combo box column.
Now what I want to do is capture the event every time a value is changed in the combo box drop down (selectedindexchanged). When the index is changed, I want to grab the row number, and then I will grab the value of the now selectedindex and do some database updates with it.
I currently have tried to put together an event grabber when the combo box is changed, however it doesn't work correctly.
My code is:
Private Sub dgvRooms_EditingControlShowing(ByVal sender As Object, _
ByVal e As DataGridViewEditingControlShowingEventArgs) _
Handles dgvRooms.EditingControlShowing
[Code].....
I put in a message box to check that it was capturing the event. I then noticed that it captures it more than once when you change the value.
The problem is when I go to click the down arrow on the row, the event is run once (message box show). Then you have to click a second time (event is run again with message box) before it shows the drop down list.
Then when you click on the value you wish in the drop down box it shows the message box (the only time I want it to run).
Then when I leave that row, it shows the message box two more times.
Effectively it goes to update the data 5 times, I only want to do it once.
I can not there is a pencil editing icon when you click on a row to the far left, and it appears when you leave the row, after already clicking on your value, it then checks on row leave that the values havn't changed, hence it runs two more times.
How do I make it so it only runs once on the value being changed?
Is there a way to disable the pencil editing, but still enable the combo box column to work? (be clickable and choose an option)
I'm working with a ComboBox which has 14 items.
Using the following code I got a problem
vb
If Me.ComboBox1.SelectedIndex = 0 Then MsgBox("item 1")ElseIf Me.ComboBox1.SelectedIndex = 1 Then MsgBox("item 2") '...ElseIf Me.ComboBox1.SelectedIndex = 9 Then MsgBox("item 9") ElseIf Me.ComboBox1.SelectedIndex = 10 Then MsgBox("item 10") '...End If
The problem is that after the SelectedIndex = 9 it won't read properly the SelectedIndex = 10, it seems like it consider only the first number (1) instead of the whole one (10). In fact get the same result as if it was SelectedIndex = 1
I have the following code;
txtprojnameupdt.Text = txtProjname.Text
cmbactiveproj.SelectedIndex = cmbactiveproj.FindStringExact(Replace(txtprojnameupdt.Text, "'", "''"))
[code].....
My understanding is that if you set a ComboBoxes .SelectedIndex to -1, it should unselect any items in the ComboBox and show nothing in the ComboBox text. This is not happening. How can I get that to happen?I have 10 items in the Combobox. Let's say the index is set to number 5 and the text says "MasterCard". Now through code I want to set it to -1 and the text should show nothing. How can I do this?
View 15 RepliesThe adultcombobox & childcombobox have value from 1 to 10, and none.I try put it in Do Loop like the code below, but the total price not come up so well, so I think I am having problem with the Do Loop and the Payment method.One more thing, do I need to Tryparse the combobox and use the selectedIndex ?
[Code]...
I create several controls dynamically with the function createControl which returns a control
....
ElseIf objName = "COMBO" Then
Dim cbo As New ComboBox
[Code].....
I know that my combobox has 3 items (in that case that the value was 2) I found that I cannot call selectedIndex before create the combobox, but I am kind of confuse here. I tried also to add it to the panel and to the tablelayoutpanel and then set the selectedIndex but I get the same error.
I am having a problem to get the results of a combobox when the user uses the tab key to exit the combobox. The combobox uses a database as the datasource. When the user uses the mouse to click on the selection the selectedindex is set proprerly, however when the user will enter some text and presses the tab key, selectedindex is set to -1.
I have attached some test code to duplicate the issue.
Imports System.Data.OleDb
Public Class Form1
Protected dvNames As DataView
Dim conDBTest As OleDbConnection
[Code]....
I'm having a problem setting the SelectedIndex property of two comboboxes.
There names are,
LateralStartComboBox
LateralEndComboBox
When I run the code listed below, both of the comboboxes display list item number 6. No matter how I try to set the selectedindex their text matches. [Code]
I have in my database a smallint field with 2 values 0/1,is it possible to bind that field to a combobox with 2 values "Yes" "No" without creating another datatable for Yes/No values or to modify sql query to bring Yes/No instead 0/1 something like binding to SelectedIndex ?
View 9 RepliesIs it at all possible to reset the existing set selected index properties for a combo box?or example if the user selects the first selected index option an action occurs, the combo box then loads in another set of options and the selected index properties are then resetIf the user then selects the first option in the combo box again, it will perform a different action to the previous one.
View 2 Repliescould not get selected item text in combobox selectedindex changed event return value is "System.Data.DataRowView"..[code]want to get the value from the combobox but i always getting ""System.Data.DataRowView".
View 3 RepliesIm currently debugging my application to found out why it's running a bit slow, when I put breakpoint where i populate one of the application combobox it's run fast but after i populate it and when I'm trying to set the its selectedindex to zero the program halt for about 2 second.. this is the line where the program get stuck for 2 seconds:
[code]...
I have a ComboBox which content might change. The issue is when the content is changed, 1) i lose the previous selectedIndex, and 2) SelectedIndex is set to -1. I would like an MVVM solution, not some solution involving code-behind. I can have the SelectedIndex set to 0 on content change, but -1 is not a valid value for my model.
What i did as a 'trick' was to have the setter of the property bound to SelectedIndex to set the value to 0 when the value is set to -1. So now i don't have incorrect value in my model. But the ComboBox does not display the "0"th item, rather an empty box.
What could i do to have my ComboBox display the first item (index 0) when its content changes ?
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Weeks is a Notifying property that is a list of strings. It is changed when i change the Year property.WeekNumber is a notifying property of type integer. Now when it is set to -1, i set the corresponding private member to 0 to avoid wrong value in my model.
In a combobox populated by a DataTable I am having two issues!The SelectedIndex property will not set 1. Either by integer 2. Or by FindString
[code]...
Is there any way to get the ComboBox SelectedIndex based on SelectedValue when Datasource property is set with DisplayMember and ValueMember?
View 1 RepliesI use DataGridViewComboBoxColumn, for places one ComboBox into my DataGridView.
Now i want to places 7 more ComboBoxen into my DataGridView, so i have 8 ComboBoxen.
The 8 ComboBoxen are filling from a database tabel, that is "Allergeen1".
Is there a code for this?
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So i made this thread using the following
Public DoCopy_thread As New Threading.Thread(AddressOf docopy)
public Sub docopy(ByVal state As Object)
If ListBox2.Items(ListBox1.SelectedIndex) <> "" Then
[code].....
Dim file_name As String = "players.txt"
Dim strReadLine As String
Dim sr_readfile As New StreamReader(file_name)
[code].....
Im Using a datagridview to display items in an invoice. when the user enters the data in, they use a DGVcombobox to select which particular item they want. what i want to know is. can i change the text of the combobox programatically after the items have been filled
Edit The DGV in question has 2 predefined columns one is a comboboxcell and the other is a text box cell im trying to fill it using
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DataGridView TIPs has TextBoxes and ComboBoxes in it and the data comes from an SQL table. I see how to get or set the cell values that come from the ComboBoxes using Item, but how do I access the actual ComboBox events and properties?
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I have problem with filling combobox cell in datagridview, when search Something in SQL I want it to load Somethings I need. Look at this picIt must be fill by somethings I searched, It is Factoring System for Customers want Factor of Somethings they will buy.
Try
SqlCon.ConnectionString = SQLConnection
SqlCon.Open()
[code].....
I would like to manually insert values in a combobox colum of a datagridview.I am using the DGV as an UNBOUND control.
View 8 RepliesI am having issues when trying to populate a combobox that is dependent on another combobox. Populating the first combobox works as expected but attempting to set the value member or display member properties of the first combo box cause its selected index changed event to fire. That event seems to fire before the first combobox is fully loaded. The issue is then raised when trying to populate the second combo box, since it is dependent on having a valid value member to complete the dynamic sql statement, and at that point in time, there is no value member.
I can�t imagine that this is difficult but searching hasn�t yielded me any results. Should I be using a different event? What is the right way to do this?
I have a simple workaround in place - not allowing the second combo box to attempt to populate unless the first combobox has an index greater than zero but this hack is no good since it clearly prevents the user from selecting the first element in the first combo box.
Private Sub SpecialsForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim sql As String
Dim dt As New DataTable
[Code].....
I have combobox column in datagridview.I have loaded a particular database table column value into it from my mysql database. The combobox in all the rows is filled with my database value successfully.But i am unable to select values from it.
And my second problem is I am unable to retrieve the penultimate row values in datagridview before the new row which is automatically generated.The error for it is nullpointerexception. But i have values in that row.
I have a dtagridview with textboxcell type. I want to add combobox at row9 and in coulum 1.[code]...
View 3 RepliesI have a combobox on a datagridview on my form. The problem I encounter is I have to click the button twice to see the items at the dropdownlist rather than once at runtime. Is there any change I can make probably in properties of the datagridview / combobox to show the dropdown list by clicking once rather than twice..
View 2 RepliesI though the problem was resolved but unfortunately is not.. I added this code to my form; Me.DgvReturns.Item(6, 0).Value = Me.DgvReturns.Item(5, 0).ValueThis Only affects the first line of the datagridview.. The second, third, fourth etc etc records are not reflected. Therefore, the vale of the textbox is not shown on the combobox.
View 2 RepliesIs it possible to have a column in a Datagrid with Only one combox at the second row and rest of the column remains empty ?.. means I want to have only one combobox at the 2nd Row and nothing else in that entire column...
View 5 Repliesi have seen the message describing the problem where the autosizing of the combobox column in the datagrid view will cause an error stating "datagridviewcomboxcell value is not valid"
View 1 Replies