I need to get the selected value of a ComboBox in a DataGridView. I have it partially working, but I get a Null Reference Exception if I change a another ComboBox in the grid.[code]...
View 5 RepliesI read a lot topic in this forum about how to set a SelectedValue in aDataGridViewComboBoxColumn but nothing was useful for me. I dont know why, maaybe I dont know understand the problem.ets see: I have a DataGridView where one column is a DataGridViewComboboxColum. filled it. know read the selectedIndex with a EventHandelr and one Delegate created in the DataGridView EditingControlShowing event.This is the class with I Fill the DataSet for the ComboBox.
Public Class Expample1
Private code As String
Private name As String
[code].....
I need to get the selected value of a ComboBox in a DataGridView. I have it partially working, but I get a Null Reference Exception if I change a another ComboBox in the grid.ere's my code:
Private Sub dgvSampleList_EditingControlShowing(ByVal sender As Object, ByVal e As DataGridViewEditingControlShowingEventArgs) Handles dgvSampleList.EditingControlShowing
Dim comboBox As ComboBox = CType(e.Control, ComboBox)
[code]....
What is the meaning of 'selected value' in combobox properties?
I create a combobox with valuemember = ID (primary key, autonumber) and displaymember = name. How do I get it to select the row with ID of 10, for example?
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Is this possible? I programatically change the selected index when a certain event is fired using this code:
DropDownList.SelectedIndex = DropDownList.SelectedIndex + 1
Now I want to update a corresponding textbox with the text that is in the new SelectedIndex of the DropDownList via postback.What's the easiest way to do this?I know how I can do this in javascript.... I was just wondering if i could do this in the VB code behind.
I have a dropdownlist that is populated by a webservice using the ajax cascading dropdown. I have not been able to set the selected value using javascript. It appears that the values do not exist when the javascript runs. I placed the javascript at the bottom of the aspx page. Here is all of the code and the javascript I have tried.
<asp:DropDownList ID="ddlBusinessArea" runat="server"></asp:DropDownList>
<cc1:CascadingDropDown ID="CascadingDropDown1" runat="server" TargetControlID="ddlBusinessArea"
[Code]....
I'm using VB 2008. I'm looking for a way to take the value of the combobox after the user selects the right one. The combobox is databound and in List mode allowing selection of only the items in the box. I allow autocomplete by setting:
AutoCompleteMode = SuggestAppend
AutoCompleteSource=ListItems
So the user can key in the right value and the value narrows down each time. The user can press enter or just click somewhere else to select the value. I need a way to display the value of the combo after the selection is made but not each time a user presses an additional key to narrow down the selection.
I would like to assign cboBegCust.SelectedValue to c and cboEndCust.SelectedValue to d
Dim c, d As String
cboBegCust.SelectedValue = "customer"
cboEndCust.SelectedValue = "customer"
[Code]....
I bind a datatable to the combobox.DataSource on load. I then give the combobox aisplayMember and a ValueMember (2 different columns out of the datatable). In the SelectedIndexChanged of the combobox I would like to use the SelectedValue property of the combobox, just to test I MsgBox(combobox.SelectedValue) and I get "Argument 'Prompt' cannot be converted to type 'String'." Why isn't it displaying the value?
OnLoad
cbCISoftware.DataSource = dbMaps.Tables("maps")
cbCISoftware.ValueMember = "id"
[code].....
Is it possible to BOTH set a comboboxes datasource AND databind the selected value?Ihave 2 comboboxes on a form that I want to populate with data from 1 table,ut I want the actual selected values on each of the comboboxes to come from separate columns n another datasource Right now if one combobox changes, so does the other if that makes sense.
Here's a sample of code:
'Bind DataSource
With cboYields
[code].....
I have a question for a combobox in Visual Studio 2008 (VB)If illed a combobox from a table and the use the following statement: Me.cmbProduct.SelectedValue = 1 (or another number)The problem is now that in the form the value is selected but with a blue color. I have on my form several comboboxes but i don't want that blue color.
View 13 RepliesI have a datagridview combobox column with data bind into it. I would like to set it selectedvalue to a value by default. How can I do it? because it does not have any selectedvalue option.
View 2 RepliesI want to know how can i get selectedvalue of a DataGridViewComboBoxCell
View 2 RepliesI've the following code for a DropDownListFor and is working ok
@Html.DropDownListFor(Function(model) model.Habilitacoes, New SelectList(ViewBag.Habilitacoes, "KeyHL", "DescricaoHL"), New With {.class = "FillHSpace"})
[code].....
see what i have done wrong here?
Dim Formview3 As FormView = CType(FormView1.FindControl("FormView3"), FormView)
Dim dropdownlist1 As DropDownList = CType(Formview3.FindControl("DropDownList1"), DropDownList)
[code].....
I am working on the mobile device application and I have a simple form where I have a text box+submit buttom and datagrid
On value enter in textbox+submit, i want to display the the data related to that value (txtbox) in grid.
Now in the compact framework there is no option like Selected value There is selected all, selected text. With the use seleted text is not working.
Dim con3 As New SqlConnection("xxx")
con3.Open()
Dim cmd3 As New SqlCommand
[Code].....
I've got a ComboBox with an ItemsSource which I've bound to a List(Of String).What I'd like to do is have the XAML update a String property when the SelectedValue of the ComboBox changes. I've seen a whole bunch of examples for TextBoxes which use
Text="{Binding Path=MyString}"sort of stuff, but I don't really think that'll be the way to go if, in future, I need to change the ItemsSource to a List(Of ObscureObject)...
I am not sure what I am supposed to write in the code behind for my vb.net project. I have a repeater that filters a gridview. When trying to declare the scalar variable @CompanyID, I get the error.
dsLetters.SelectCommand = "SELECT DISTINCT LEFT(ProductName, 1) AS [Letter]
FROM Product, CompanyLink, Company
WHERE Product.ProductID = CompanyLink.ProductID
[code]....
I have a ProbationComboBox with the SelectedValue bound to a RegistrationBindingSource, and the DisplayMember bound to a ProbationBindingSource. [code]
View 2 RepliesI have a gridview with a dropdown list that was created programmatcially. I want to have access to the selected value and to that row's Id. I have the dropdownlist created in *Gridview_RowDataBound* and I am able to use the text in the cell but my addHandler is never fired. Where do I give it the Add handler. I believe I can assign it the addhandler in RowCreated but how would I be able to set up the add handler if the button is created in rowdatabound?
[Code]...
It fits best in Rowdata bound because my dropdownlist items don't duplicate but I need to be able to use the addhandler I created.
I'm converting a system of numerous programs from foxpro/foxweb/javascript to asp.net/vb/sql server.
I'm coding for a dropdownlist which is currently controlled via js.
I don't like using the control this particular way, but I want to maintain look and feel for the customer.
The control is initialized with some values via Page_Load() in behind code.[code]...
When my form is loading, it executes a Method called populateListBox().As the ListBox is populated, it inevitably triggers ListBox.SelectedIndexChanged, which triggers this
Private Sub lstLabels_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstLabels.SelectedIndexChanged
Try
buttonCheck()
Dim pathText As String
[Code]...
If I stick the Try...Catch in, allowing it to bypass the error, everything loads fine and when I double click an item in the ListBox, I have a MessageBox setup to show the SelectedValue, and it works fine (it shows a number like it should). Even if I put a MessageBox in the SelectedIndexChanged event, I still get the same error on the MessageBox line during the loading of the form.
Is this because the form is not fully loaded that I get this error? And what would be the proper way to handle this? I need this code in the SelectedIndexChanged for when the user selects a new item, so how do I keep this error from happening (or maybe even the event from triggering) during form load? Because I'm sure having a Try...Catch is not really an accepted form of "fixing" an exception; it's just ignoring it.
I just do not understand the combo box theory when you need to define the selectedvalue in a datagridview combo box. anyone have a working example? JMC had a lot of definition in other posts but.. i just did not grasp it. This combo box is in DataGridView1
[Code]...
I am tring to bind a data to listbox with where combobox.selectedvalue. My code is below; I am using data entity in wpf project;
Class Window1
Dim db As New AdvanceEntities
Private Sub Window1_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded[code].....
Also I need to create a query with Join In statement. I need to get two table in one query, they have same values in USERID collumn.
In order to fill a datagridview according to the selectedvalue of a combobox I've tried creating a stored procedure. However, as I'm not 100% sure what I'm doing, depending on the WHERE statement at the end of my stored procedure, it either returns everything within the table or nothing at all.This is what's in my class:
Public Function GetAankoopDetails(ByRef DisplayMember As String, ByRef ValueMember As String) As DataTable
DisplayMember = "AankoopDetailsID"
ValueMember = "AankoopDetailsID"[code]....
guess it's down to the WHERE part of the stored procedure, but I need a way to pass the selectedvalue of the combobox into the @AankoopID parameter.
I have a WinForms app built with VB.Net in VS 2010, and I'm scratching my head over the following issue.I have a form with a combobox which gets bound to a datasource when the form is loaded:
With Me.cboCompany
.DataBindings.Clear()
.DataSource = Me.m_dsBidResults.Tables("Company")
.ValueMember = "company_id"
[code].....
This seems to work fine, as long as the user doesn't switch focus to some other control and then go back to the combobox. After switching focus, if the user then changes the combobox selection to the first item in the dropdown list (SelectedIndex = 0), the SelectionChangeCommitted event fires, but the SelectedValue remains set to the previously selected value. I've verified this by adding a message box in the above event handler, displaying SelectedIndex and SelectedValue side-by-side.
'add this to SelectionChangeCommitted event handler MsgBox(String.Format("Selected Index: {0}, Selected Value: {1}", cboCompany.SelectedIndex, cboCompany.SelectedValue))
This does NOT happen if the user changes SelectedIndex to anything other than 0; everything behaves as expected. I've verified that the table I'm binding to contains unique values for company_id and company_name.Do I need to use some other event to verify that the SelectedValue has actually changed?
I have an ASP.Net form where I use a DropDownList control to display data retrieved from a table. However setting the SelectedValue of the DropDownList to a value not existing in the dropdown list does not trigger an exception.
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I want to Update Column of a Table where ColumnName will be DropDown.SelectedValue.Example: A set of RECORDS will be displayed from a Customer Table where CUstNo ='1234' and City= 'Chicago' and Grade ='B' Once displayed I want to Update the grade to 'A' of all those customers from the above criteria. In My case I have like 100 Columns, so in where Clause Column Names will be selected from a DaropDown.In My Query, Update Customer SET ColumnName= 'some value' where ColumnName ='ActualValue'So how can I pass the ColumnName which is Dropdown Selected Value. I believe I can't give as Update Customer SET DropDown.SelectedValue = 'some value' where DropDown.SelectedValue ='ActualValue'
View 1 RepliesWInforms Combobox SelectionChangeCommitted event doesn't always change SelectedValue
View 1 Repliesi want to set the current displayed item in combobox by combobox.selectedvalue = valuehere is the code
Combobox.selectedvalue = value
rivate Function populateComboSupplier(ByVal supplierID As Integer) As Boolean
Dim readSupp As New SupplierCRUD
[code].....