Using DataGridView Comboboxes In Tandem
Dec 1, 2011
What I want to do is use two drop down comboxes (Comboboxes 1 & 2)in tandem in a databound datagridview.Both comboboxes are bound to tables in an SQL 2005 database.By this I mean select an item in combobox 1 and have its display member appear in that combobox.This is usually text.The value member for combobox 1 to be displayed in the combobox 2 which is also text.The value member from combobox 1 has identical values to the display member of combobox 2 in the database tables.If I need to change the display member in combobox 2, as all situations have their exceptions, I want to do this without changing combobox 1.The value member for combobox 2 is numeric and is put into another cell in the DGV for carrying out calculations.I have managed to get the display of combobox 1 working on its own and ignoring the value member.I have done the same with combobox 2 and have the value member working correctly.
Can databound comboboxes be used in this manner or will VB.net not allow this type of operation.I have not done this with any code. I tried to get my required operation through the edit facility in the DGV.When attempting to run the program, it does not compile and throws an error which basically says "You have done something wrong.Sort it out."Typical Microsoft help! Can it be done using code in the datasets or binding sources?
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Feb 13, 2012
I want to use two datagridview comboboxes in tandem. By this I mean make a selection in the combobox in column 1 and have its value member displayed combobox in column 2.Column 2 combobox uses it as the display member and its value member, which is numerical, is used for calculations in another column (textbox) in the grid.Both combobox columnsare bound to their own tables in a common sql2005 express database.I have a similar operationwith comboboxes that are not in a datagridview using the following code:
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Sep 11, 2010
i have a datagridview with a column with comboboxes. My problem is that the changes that i am doing from comboboxes didn't occur to datagridview immediately but after the user click to another cell.
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Apr 2, 2009
I have a vb.net window app that has a number of combo boxes on it. These are being populated from a number of XML files and all this works like a charm. The problem i have is when it comes to putting the comboboxes in a datagridview. I have set up my columns and have set the first column to be a combobox but i'm having problems referencing this so that i can set the datasource to populate it.
I've looked everywhere but cant seem to find how to reference this control. Once this has been selected it will populate a second combo box based on the data from the first. I think i can sort this out, if i could only work out how to set the datasource of the first combo programatically.
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Oct 3, 2011
I have problem with a datagridview with combo boxes firing unwanted events handlers.I have a datagridview with 4 columns all data bound. All of these columns have comboboxes. Column 2,3,4 has a custom generated combobox with code with on the 'DataGridView_EditingControlShowing event' and have event handlers (Dropdown,selected Etc). (Data in the custom generated comboboxes needs to be filtered and worked on)
[Code]...
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May 10, 2011
I am developing a visual object recognition system in c++/c# as a class which needs to be used in a VB program. Is there any way to utilize c++code from VB? I.E. call methods, return variables, etc.
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May 5, 2009
I have three comboboxes in a form. The first is the parent of the second, which is the parent of the third. When they are all updated, a datagridview should be updated.
The problem is that the user can choose to change the value of either combobox, so I don't know which combobox's value is being changed. Therefore I now update the datagridview from the third combobox's selectedvaluechanged event. This unfortunately means that if the first combobox is changed, the second and third comboboxes selectedvalue events must trigger. As a consequence, when the first combobox is changed, the datagridview is being updated about six times (which doesn't work for me performancewise).
What I'd like to do is to call the updatedatagridview sub from either one of the three comboboxes, but only if the user has chosen to change that specific combobox's value (that is, get the form to only update the datagridview when the selectedvalues of all three comboboxes have been set).
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Oct 13, 2010
I have a form that lists all of the clients in a DataGridView and when I click on a column that is a Link I want the data to populate into the form I use to capture. My problem is that when I click on the link all the TextBoxes on the form are filled correctly but my ComboBoxes are not.[code]
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Dec 11, 2011
i've uploaded in SkyDrive my project to give a better picture of my problem:
Cascading Combobox works just once in _SelectionChangeCommitted,
and, DataGridView do not follow 3rd Combobox filter
[Code]...
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Apr 24, 2012
this is a subset of a previously posted problem, I have narrowed down my issue and am reposting a question from this thread: [URL] I have apparently confused the compiler by renaming some comboboxes in Visual Basic .net express? (See relevant code below) I think the confusion is in who should handle what, with two routines named with variations of ComboBox1 and one handling the other ( it confuses me just trying to interpret it mentally):
[Code]...
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Oct 28, 2011
I have a form with 4 comboboxes and a button. The first combobox is enabled, but the rest of the controls are disabled. When the form is opened I fill the first combobox (cbxMethod) with a datatable. When the user selects something in cbxMethod the next combobox (cbxStudy) will be filled and so on. When the last combobox (cbxAnalyte) has a selected value I want to enable the button and give it focus so the user can move forward with the program. I basically want to force the user to move from one combobox to the other, until all are filled.I am currently using the SelectionValueChange event, but this event only fires when the user changes the value with their mouse or hits the Enter key, not when the user hits the Tab key.
Public Class frmCalculatedAnalyte
Private cv_dt As New DataTable
Public Sub New()
[code]....
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Feb 2, 2009
I have finally figured out how to download a file with background worker and downloader. Now the form does not freeze.. I have only one problem left now... How do I get the progress bar to increment in tandem with the data flow? I have listed my full code below. Towards the bottom where the DoWork() sub resides, I am just a few lines short of this year long goal.
Imports System.IO
Imports System.Net
Imports System.Text
Public Class Form1
[CODE]...
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Dec 11, 2011
I've uploaded in SkyDrive my project to give a better picture of my problem:Cascading Combobox works just once in _SelectionChangeCommitted, and, DataGridView do not follow 3rd Combobox filter?
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Aug 4, 2011
I'd like to create a data bound comboboxcolumn off of the distinct results of a view in my database. The view returns tablenames within the database which do not already have an entry configured. I use this as a entry to tell a purge application how and what tables to purge.Setting up this combobox proves to be a little more difficult than I imagined because my view pulls from informationschema.columns in the master db and therefore is unrelated in the 1:M traditional scenario. So as a result my displaymember and valuemember get the same field unlike most examples I see where some integer or enum is the backing value in the valuemember. Not the case here.
When I put all this together and run the code I do have choices in my drop down list but the current cell is blank. What is going on here?..create column
Dim Tablenamecolumn As DataGridViewComboBoxColumn = New DataGridViewComboBoxColumn()
With Tablenamecolumn
.Name = "DBTableName"[code]....
If I change things around a little bit and I get an argumentexception telling me that "DBTableName does not exist".I have one query that on startup calls for all my entries in purgeconfig table and it contains "DBTableName". Then I have another query which returns me a single column with many rows and a different field name and that's what I am using for the column's datasource. I can manipulate that query to change the column name to match "DBTableName" that the other datatable has, yet it still doesn't work. Do I need to create a data relation or something between them? Why aren't they wiring up?
The only way I can make my code work without the argument exception is to refer to my combobox with the field name of the column coming out of my View. Anytime I start using the other column name it throws the argument exception.This isn't the only column i'm going to need to do like this and i've spent a lot of time trying to figure out what i've done wrong and why it doesn't display the current value in the cell, only a blank cell insteadl.
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May 13, 2009
I have 5 combo boxes all connected to a database by datasets.
The user should be able to select different items but for some reason when one combobox item is selected, the same item becomes selected for every combobox.
I haven't coded anything regarding the cbx's so why is it doing this?
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Jun 21, 2010
I have two comboboxes the first one is for order #, the second one is for the amount of order payments, there could be 1, 2, 3... payments for this order. I would like to get all payments to show in the second combobox that relate to the order # selected in the first, process that payment by changing other values in other textbox's. Then have that payment psoted as processed back to the DB table. I have a binding satament, but it pulls all payments, and not just per order. How can I get this to select just by order #?
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Feb 12, 2010
I have this code that adds items in 2 comboboxes: The first code works fine as it adds the dates into the comboxes
Dim myConnection As OleDbConnection = New OleDbConnection
Dim myCommand As OleDbCommand = New OleDbCommand
Dim myDataReader As OleDbDataReader
myConnection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|Network_Info.mdb"
[Code] .....
But when I try to add items by month I always get this error in these lines:
ComboBox2.Items.Add(myDataReader("DateRecorded"))
ComboBox3.Items.Add(myDataReader("DateRecorded"))
It says: IndexOutOfRangeException was unhandled
[Code] .....
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Oct 27, 2010
I have a project in which the comboboxes above the code window, below the tabs have disappeared. If I open and close the project, they do not appear. If I open another project, they do appear. As soon as a open the project where they do not appear, they disappear.
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Feb 8, 2011
I have: [code] So, when I select something from cmbx1 it selected in cmbx2. How does it works?Do I need a copy of dt for second combobox to get independed but same values?
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Mar 15, 2012
My problem in the Combo Box and SQL query .. I have three comboboxes linked to an Access 2007 database
[Code]...
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May 10, 2012
I've been working on a VB project where I use a 1st drop down list to select a movie category and then in the 2nd drop menu, movies from that category will be displayed. The movies are stored in a 2-dimensional array by category. I've been able to edit my array but I'm having problems with my .AddRange() function. What would I have to put in those parentheses for the list (for each category) to appear in my 2nd combobox when the category is selected?
[code]...
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Jun 21, 2010
I bind the two comboboxes with table. One combo contains product and another contains subproduct. When I clicked first combobox then subproduct of that is filtered in another combo. When I clicked next,previous, it is working properly. But when I go to last record second combo is refreshed means it is not showing proper subproduct. Given the code on 1st combo_selectedIndexChanged. When I go to last record the SelectedIndexChanged event occur.thats why it is not show me last record proper.
Private Sub frmType_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
cmd = New SqlCommand("select makeName from Make where status='Add' or status='Edit'")
dt1 = New DataTable
dt1 = ob.getDataTable(cmd)
cmbMakeName.DataSource = dt1
[Code] ......
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May 27, 2009
I have a combo box on a form, it has a large number of values in it (about 40000). When the combo box populates it flickers from invisible to visible for about a second.After investigating this I am sure that it is not the call to the database that is causing this but when the combo is drawn.
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Sep 1, 2011
I have been setting DataSource for a series of combo boxes to the same table as they all display the same options. However, when I ran the project, any change in any one combo box makes all the others 'flip' to the same selected value. This is obviously wrong.
In Access, you have 'Control Source' which is the db field that is bound to the combo box and 'Row Source' can be a query or whatnot that several combo boxes can run 'independently'.Is there an equivalent option in VB.NET? I DO NOT want to manually enter the exact same options many times as that is hard to maintain, to say the least.
Just to repeat: it is not going to work to say DataSource = Row Source. if two combo boxes are set to the same data source, a selection in one automatically makes the other one select the same value. unless, of course, i am missing something.
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May 12, 2012
I need the comboBox to show the data from dataTable but i don't know how to do it. To do that we need to make relationship or what? Like posted another day.
1-Column No.
2-Column Type = mp3, wav, ogg
3-Column CompanyName = CompanyName
4-Column Volt = Volt
How it work when select type for example : mp3 and column companyname it show the volt we have added. the same when we choose mp3 and another companyname it show the volt of that company.
Because i need to know which companyname show the update of their volt.
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Jan 16, 2012
I use VB 2010 Express My problem is:I have two comboboxes one button and one textbox.So what I am trying to do is.Add company names Like EA Games and lets say product name is Crysis.and I want it to show the barcode number of the product n P.I.D?
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Jun 9, 2011
I have a form with two comboboxes ,one text box and a button .I have multiple tables in ms access database with same structure , col1 and col2 .I want to insert text box value into column1 in the table selected from combobox1 and into column2 in table selected from combobox2 such as if i select table1 from combobox1 and table2 from combobox2 and click on the button, data should be inserted into both table1 and table2.when i run the code it , i dont get any error but it does not load the tables in comboboxes
Imports System.Data.OleDb
Partial Public Class Form1
Inherits Form
[code]....
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Feb 11, 2012
unfortunately searching the web i cannot find a decent example that allows me to loop through a winform to make sure comboboxes items are selected.basically what i would like to do is check the form if the comboboxes have been selected if not then highlight them yellow and set the focus on them.
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Feb 6, 2010
I would like too generate a number of comboboxes at runtime and then pass them to a Sub, like this:[code]What is the correct syntax to use to pass the comboboxes collection to the Sub?
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Aug 11, 2009
I have the following class. Basically, i want to populate a bunch of comboboxes. So i want to return an Id and description column almost all the time.
Public Class combodata
Private _id As Long
Private _description As String
[Code]....
how can I return the items as an array. Is converting to an array the best way? I will need to populate a combobox with the returned result
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