Cascading Combobox Within A Datagridview?
Mar 3, 2009
I am trying to have cascading comboboxes within a datagridview.I have it partially working. dataset1 has 2 tables, with a parent-child relation built inDatagridview1 contains:column 1: combobox, bound to bindingsource 1 which is bound to dataset1column 2: combobox, bound to bindingsource 2 which is bound to bindingsource 1when column 1 is selected, column 2 choices are limited to those related to column 1however, if column 2 is chosen in a row that previously had data, and was loaded with the form, then its choices stay the same as the last row where column 1 was physically selected before column 2.I seem to need to refresh the binding source somehow to emulate how it works if I was to go into column 1 and make a selection by hand.H
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Oct 2, 2011
I have a DataSet with a DataTable that has several numeric columns of Data. The numeric data is composed of distances given in U.S. Standard units. I currently have my ComboBoxes set up and working, but I need to expand on what I currently have in two ways.I need to be able to convert the Decimal numbers in my data column being displayed to Fractions, is there a way to do this and maintain databinding? In this case its the Display Member of the data source...I need to be able to display my drop down options in different sets of units... I've written Unit Conversion classes to help take care of this, but I don't know if I can somehow do this as well and maintain databinding? I'd like to convert the units on the display members as well...
Private Sub ComboBox1_SelectedIndexChanged(sender As System.Object, e As System.EventArgs) Handles ComboBox1.SelectionChangeCommitted
Select Case ComboBox1.SelectedItem
[code]....
What is the best approach for using ComboBoxes when dealing with issues such as displaying fractions and units...
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Feb 15, 2012
I have two combobox in a form: Cb1 and Cb2
When I load the form, Cb1 and Cb2 are connected to a bindingsource.
When I change Cb1, the code (below) changes Cb2 to show only the items according to Cb1
This is working fine.
The problem is when I change Cb1 , change Cb2 and click the save button..... Cb2 seems to be 'lost'...
I'm using VS2008.
CODE:
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May 2, 2012
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?
[Code]...
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Dec 5, 2010
I would like to manually insert values in a combobox colum of a datagridview.I am using the DGV as an UNBOUND control.
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Apr 25, 2012
I have two dropdown within a DetailsView and I want to work in cascade, the idea is that an area contains various issues and these issues depend on the selected area, but I get the following error: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
[Code]....
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Sep 7, 2011
I have been practicing with the online tutorial on how to do this except my dropdownlist just gets a "method error 500" in the dropdownlist.
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May 10, 2012
I have two comboboxes say
DDL 1 : Artist
DDL 2: Albums
And a Gridview containing (album name, artist name, no.of tracks, year, etc), What I want to achieve is: when an option(artist1) in DDL1 is chosen, then the albums related to DDL1 needs to display in DDL2 and also it must update the appropriate values in the gridview (artistname, albums(album name -no of songs, year)etc... based on the selection made (language: Asp.net(VB)-Sql server ).
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Feb 12, 2010
how you populate cascading comboboxes? I have one combobox on one form, from which I'm trying to populate another combobox on another form. The first combobox contains Locations while the second combobox contains offices for whichever location is selected in the first combobox. I would like it to work as follows: user clicks on first combobox to select a location, and then the second combobox lists all the offices for that location.As of right now, the second combobox is just displaying the first office that is in the first record for the respective database table it is pulling from.
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Aug 29, 2008
I am writing a mdi app (vb 2008 express) where i want the child forms to start in the same position i.e. on top of each other. Currently the forms are casacading. I know you can set the default mdi layout in the mdiParent using [code]....
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Feb 12, 2010
How I can populate a combobox (combobox2) based on the selection made from another combobox (combobox1)? They are on different forms. Combobox1 lists locations, while combobox2 lists offices for each location. I would like it to work so that when the user clicks on combobox1 and makes a selection, the 2nd form loads with combobox2 showing all the offices for the selected location.
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Jun 26, 2009
I Need a working example of a cascading drop down list box written in vb.net for my ASP.Net MVC application. I tried converting three examples written in C# but can't seem to figure it out and I have given up.This is my first .net application so I'm a newbie. The biggest problem I'm having is just don't understand the java script code in the views.
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Feb 7, 2012
I have two cascading dropdown lists I'm attempting to bind to two separate SqlDataSources each.
These dropdownlists exist in a FormView's EditItemTemplate. Inside the EditItemTemplate two sqldatasource controls exist that populate the department and the jobname. The DeptID and the JobID are the primary keys in those tables. This creates the "cascading effect" between departments and jobs. When a department is selected, only the jobs associated with that department appear.
This piece is working properly.
<asp:FormView ID="frmProfile" runat="server" DataSourceID="sqlDSProfile"
DataKeyNames="EUID" style="margin-top: 0px">
<EditItemTemplate>
[Code].....
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Sep 14, 2011
Error is ddlgvRooms' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value
I read a lot of people having issues with this particular problem but non of the fixes have worked for my case.I have tried a few different things such as setting appenddatabounditems="true" also tried to set in the itemcollection a default null value.Most of the forums post on this that I read were from a couple years ago im hoping they fixed this bug already and I am just overlooking something.I am trying to get my cascading dropdownlist to work in a gridview edittemplate fields. I created these in my detailsview on insert everything works great.
MySetup Basically I have a webmethod that has 2 functions getRooms and getJacks that are supposed to grab the data from the 2 datasets that I have created.The Datasets get their data from a couple of SQLSTOREDPROCEDURES.My aspx page dropdownlist and AjaxCDDL looks like this
<EditItemTemplate>
<asp:DropDownList ID="ddlgvRooms" runat="server"
SelectedValue='<%# Bind("intRoom") %>'>
[code]....
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Jun 5, 2012
1. A dataset contaning all the tables, views and stored procedures from a db in the Data Sources
2. A stored procedure that makes a query using a parameter
3. 2 comboboxes with their DataSources defined
The first combobox gets populated with a stored procedure (with no params, through the Combobox task). When the user selects an item from this combobox this should trigger an event that populates the second combobox with the second stored procedure that requires a parameter.
Since the Dataset is already add to the Data Sources and contains all the procedures I need, I don't wanna to create more datasets or calls to the data base, however I don't know how to set the query using the procedure I already have passing the parameter.
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Mar 14, 2010
I have several entities I need to make IEquatable(Of TEntity) respectively. I want them first to check equality between EntityId, then if both are zero, should check regarding to other properties, for example same contact names, same phone number etc. How is this done?
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Mar 20, 2010
I have the EXACT same code on another form and it works great, on this form though it is giving me this when loading that is happening when trying to populate the cboItemCode and cboLinePart combo boxes based on what is selected in cboLine (which will be the initial load value)[code]It is happening, I guess on that CInt( in the sql, but why?I don't understand why it is considering cboLine.Selected value as a "DataTypeRow" when it is just looking at the value member? If I remove the CInt() for the cboLine.SelectedValue it will give another error saying "Operator '&' is not a defined for "SELECT LinePartID, LinePartName," and type 'DataRowView'.[code]
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Jun 29, 2009
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.
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Feb 20, 2011
I have a dtagridview with textboxcell type. I want to add combobox at row9 and in coulum 1.[code]...
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Jul 6, 2010
I 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..
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Jul 6, 2010
I 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.
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Jul 7, 2011
Is 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...
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Jan 20, 2010
i 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"
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Nov 1, 2011
I am using visual studio 2008, vb.net Windows app and ms access 2003.I just wanted to know that there is a form in which i select an option from the list of options in combobox.. While the user selects a type, i want the data relevant to the type be displayed in the datagridview. I have bound the datagridview to datasource in design..But am blank as to which event can i use and how should i start it ?? Went through various sources, but seemingly vague.
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May 18, 2012
I have a datagridview which have a ComboBoxCell, ComboBox is bound to data,, I want to use it as Traditional ComboBox,, I mean I want to display its Item (from display members) on the base of its value.
For example:
When I do this
Datagridview1.CurrentRow.Cells(4).value = 4 'Cell 4 is the DatagridviewComboBoxCell
It gives me the error that
"DatagridviewComboBoxCell.value is not valid",
But I want that this combobox should Select And Display the item which value is 4.
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Nov 16, 2009
Using VB.Net, I have a DataGridView with a ComboBox Column. What even do I use for when the user changes a selection in the ComboBox?
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Jun 21, 2010
I am trying to add a combobox into my datagrid which connect to access database by using the code below. The result I wish to get is the combobox is locate at my datagrid column that already exist, but what I get now is it will add a new column with combobox that I want to add. Can I just update the combobox into my existing column7 but not a new column?[code]...
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Nov 17, 2009
I have datagridview connected with sql datebase and i want to add combobox to datagridvew (example:Time1 column)
Option Explicit On
Imports System.Data
Imports System.Data.SqlClient
[Code]....
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Sep 9, 2010
I bound a column ("Initials") of DataGridView (which is bound to dataset ds) to dataset ds2 ("employees"). This part works fine (comboboxes appear loaded with employees initials in combobox selection), but theere is no default value in the column. Do I have to add some event handler or binding stuff??
[Code]...
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Sep 3, 2009
Because there was no aswer in Windows Forms General general forum i decide to post the same question in here... is about cascading comboboxes in vb.net.. Could somebody give me a guideline how to stop previouses selections of dissapearing when another selection is madein a new row... [URL]
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