Get An Integer Value From A ComboBox Using A DataTable As Its DataSource
Jun 23, 2010
I am using code similar to this to populate a combobox with items from a database. The display works fine, but when I try to get the combobox.SelectedValue it is returning a DataRowView, where I need an integer. Obviously this is becuase I haven't casted the value to an integer, but the function, CInt(cboPosition.SelectedValue) is throwing an InvalidCastException. Is there any way that I can get the ValueMember's type to be an Integer?
Dim cn As New SqlConnection(CreditDisputesLogConn)
Dim cmd As New SqlCommand("CustomersLookup", cn)
Dim da As New SqlDataAdapter(cmd)
[Code]....
View 1 Replies
ADVERTISEMENT
May 20, 2010
How can I get an item value from a Combobox using a datatable as it's datasource? Here's my code for constructing the combobox. This code works, that's why I'm not showing it all, but I want you to know how I'm creating the combobox.
Try
query = "SELECT category_id, name FROM categories ORDER BY name ASC;"
dbCommand = New MySqlCommand(query, dbConnection)
[Code]....
I want to display what is the item you physically see in the combobox that you select.
View 2 Replies
Jul 7, 2008
I have binded a datatable to a combobox, using DataSource, DisplayMember and ValueMember properties. Now I try to set the combobox to a preset value using comboBox.SelectedValue = value. Nothing happens however.
[Code]...
View 4 Replies
Aug 4, 2011
I'm trying to setup a form to search for data within an existing DataTable.
FilterColumnsComboBox.DataSource = WOTable.Columns?
FilterColumnsComboBox.DisplayMember = ???
FilterColumnsComboBox.ValueMember = ???
[Code]....
I could hard-code in the column names ("WO_Number",WO_CustID","CustLastName", etc...), but would prefer to pick this up dynamically (partly because I want to reuse this code later).
View 4 Replies
Feb 16, 2010
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]...
View 3 Replies
May 20, 2011
I have a datagridview bound to a datatable setting its datasource property to the datatable. I would like to have a child form that contains a list of columns associated with the datatable that contains a checkbox that will allow the user to hide and show the columns ( I do not know the best control to use here) (I assume this is the easy part as All i need to do is loop through each of the datatable's columns to get the column name)
now I would like save these visible columns on some event like form_closing so that the next time the user opens the form up it will remember the settings
View 5 Replies
Jul 10, 2012
using vb.net/asp.net 2008question: i found this c# code snippet and wondering how do you do this in vb.net?DataTable dataTable = gridview.DataSource as DataTable;
View 1 Replies
Dec 6, 2011
I have a datasource attached to an Access DB. I have a problem if I remove a datatable from my datasource(which contains lots of datatables). I have to manually remove the reference to that datatable from the designer file for each form that uses the dataset.
View 6 Replies
Aug 15, 2010
I am using VB.net.
I have a gridview with a datatable datasource.
What is the best option to update the datatable when i delete a row in the gridview and then show the gridview without that row?
View 1 Replies
Apr 8, 2011
Can you tell me how to syncronise the a DataSource when inserting a new row into a DataTable? [code]The user enters values in the Textboxes and clicks a save button.At that point I get a concurrency violation when using .Update to get the new row into the database.Can you tell me if I need to add any more code to synchronise everything?
View 2 Replies
Apr 5, 2010
Let's say that I have a DataGridView(myDGV) which I populate as follows:
'...
Dim strSQL as String = "SELECT col1,col2,col3 FROM myTable"
'....
myda.Fill(myDtb)
myDGV.DataSource = myDtb.
'The above code fills the DGV with data from the underlying query
'of the DataTable.
'Supposing that I want to add an unbound Column to the end of the DGV which appears together with the data returned by the query, is it possibe?
View 6 Replies
Jul 25, 2011
Dim GridDTB as Datatable[code]...
It is updating only on the table "DT3", which is last create table in the array.
View 1 Replies
Nov 7, 2011
i need to query the datatable & set the outcome as datagridview controls datasource
vb.net
Private Sub Txt_Search_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Txt_Search.TextChanged
'routine objective:- Filter datatable & set the datagridview datasource
[code]....
View 3 Replies
Jul 15, 2010
I have a base form and I am trying to get the DataSource of the ActiveControl if the control is a datagridview.What I have so far is:
Dim curControl As Control = Me.ActiveControl
Dim ControlType As String = curControl.GetType.ToString()
If ControlType = "System.Windows.Forms.DataGridView" Then
[code].....
View 4 Replies
May 11, 2011
I want to know how to perform row delete to datatable which is a datasource to the grid.
In details: I have a datagridview (dg) and its datasource is set to dtItem. User will select some rows in dg and press 'delete' button.
dg.DataSource = dtItem;
I will perform a loop and delete the records. Here is the code eg:
foreach (DataGridViewRow drw in dg.Rows)
{
if (drw.Selected)
[Code]....
The problem is it didn't delete correctly. If user selects row index 0 and 1 in dg and delete it, it will delete the first one correctly and then finished cuz no more row is selected in next gridviewrow.
I tried google and didn't find what I want. may be because i don't know the correct keywords I should use to search.
View 2 Replies
May 31, 2012
I list folders in my combobox but I'm trying to sort the folders alphabetically and then numerically or vice versa.
My coding to populate my combobox is
With Combobox1.DataSource =
(From folder In New IO.DirectoryInfo("Path").GetDirectories
Select (folder.Name)
).ToArray
End With
Is it possible to sort the combobox?
I have folders that are numbered like 1, 50, 115, 189 etc.
These should display as
1
50
115
189
however they display as
1
115
189
50
View 2 Replies
Aug 12, 2010
I have defined a datagrid which has combobox in one of the columns, is there anyway to modify the datasource of the combobox (the source of the list) at run time?
View 2 Replies
Jan 19, 2010
I am trying to get the valuemember of my combobox but it just won't work. I have tried a lot of things (won't post them all here) can somebody just show me how to do this?
Private Sub cmbGroup_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbGroup.SelectedIndexChanged ' Get valuemember here End Sub
View 2 Replies
Sep 25, 2009
I have a ComboBox that is bound to a List(of T).Now I type-cast the ComboBox.DataSource into List(of T)and add some more elements in the List.The items collection of the ComboBox doesnt get reflected and the new element does not show up in the ComboBox. Am I missing something ?
View 3 Replies
Jun 6, 2012
Private Sub UsernameEdit_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = "stuff"
[code]....
The combobox just populates with "System.Data.DataRowView" I know it is some command to read the correct data out of the table, is it setting up something like:
dim i as integer
for i = 0 to CompanyNames.length-1
companyadapter.fill(companynames.rows(i)]
next
View 2 Replies
May 17, 2012
just curious what happens when i set the datasource of a combobox or datagrid or what-not to a dt then when i want to change what's in the combobox etc., i just set the datasource to a new one. i am cleaning as i go but just want to know what happens to the old datasource:
[Code]...
View 10 Replies
Mar 24, 2010
I have a combobox which i am binding to a sortedDictionary list, so it displays in ascending order. My question is, I need to display "--Select--" as the first option. Is there any way to either:
1) add another item besides for the datasource
or
2) add an unsorted item to the top of the sortedDictionary
View 2 Replies
May 11, 2011
I'm trying to use reflection with LINQ on a sub that set datasource of all my ComboBox:
Usual Method:
' ACAmp Panel
cboACPanelAmp.ValueMember = "IDACAmp"
cboACPanelAmp.DisplayMember = "Description"
cboACPanelAmp.DataSource = m_Entities.ACAmps.OrderBy(Function(c As ACAmp) c.SortOrder).ToList
Want to use that sub
FillCbo(cboACPanelAmp, "ACAmp")
Private Sub FillCbo(ByVal cbo As Infragistics.Win.UltraWinEditors.UltraComboEditor, ByVal entityName As String)
cbo.ValueMember = "ID" & entityName
[code]....
I can't figure out the last part of the last line, the LINQ
View 2 Replies
Jun 2, 2011
I have to add item "Final Grade" to my cboQuarter. The thing is, my cboQuarter already has a datasource and I can't add the item "Final Grade" during drop-down. The error says, "cannot modify or insert (can't remember word by word) when it already has a datasource."
View 4 Replies
Apr 5, 2011
I have a 2 classes, one is Employee, the other is Employees. Basically Employees is a collection of Employee, I have a combo box where the Datasource is Employees.
When the user selects a value from the combo box, How do I get an Employee object from whatever is selected?[code...]
It is an Infragistics combo box by the way.
View 1 Replies
Mar 5, 2011
Appropriate Title would be: Bind comboBox Tag to database.I have a comboBox on form which is bounded but and I need to populate it manually. With some reading on net i have found a way but it is not working
I can populate my combo, select item in combo, update database but the problem is when I load my form it displays empty combo (combo is fulled with my custom data but nothing is selected it must select correct ItemText) and after selecting a value in combo, the value disappears as soon as combo losses focus .
[Code]...
View 17 Replies
Apr 19, 2011
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].....
View 2 Replies
Feb 17, 2010
public Enum ClaimStatus
Ongoing = 0
Completed = 1
[Code]....
With code above, how do I assign the value to the combobox while retrieving data from the table so that it point to the corresponding combobox item. For example, if the value of status_ID is 1 then the combobox should show "completed" in the datagridview.
View 1 Replies
Sep 23, 2011
I have this controls
ComboBox: list of myobject
TextBox: view a description
DataSource: list(of MyObject)
MyObject:
property id as int
property combodesctription as string
property description as string
What I want: I set the datasource of combobox with list of MyObject when I select a value on combobox, I would like see description in TextBox is it possible bound text property of TextBox to same datasource of combobox or it is possible change description of TextBox only with changedEvent of ComboBox?
View 2 Replies
Aug 24, 2011
I have a ComboBox which is bound with a DataSource from (obviously) a Database. However, there are 659 different entries inside this Database and I was hoping to tack on AutoComplete.
I tried setting the Source to the ListItems since, after initialization and the data is bound, all the items necessary are in fact inside the ComboBox so I had assumed that it would pick that up. I was wrong. I tried using a Custom source but VS errored out saying that I couldn't do that since the ComboBox was bound.
My question is, how can I utilize AutoComplete's "Suggest" mode with a bound ComboBox?
View 18 Replies
