Create A Combobox With Values Depending On Values?
Jun 24, 2009
I have filled a DVG with information and added another column to index(8) pragmatically Now i want to create a combobox with values depending on values in other cells on the same row so each row will have a combo box with different selections. below i have placed the code and hoped someone would have some input on how to approach this. i have tried datagridviewcolumn but that fills every row with the same information regaurdless of a if statement
[Code]...
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Mar 29, 2010
I want to choose a value dynamically from comboBox depending of the values selected previously in two comboBoxes.the code that loads the comboBoxes:
Private Sub LightClassComboBox_DropDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles AreaClasificationComboBox.DropDown
TrafficDensityComboBox.DropDown,.....
[code]....
The problem is that in the last Sub in the If sentence gives an error of: Null Reference Exception, because the compiler thinks that in that event the data are not loaded, although the data are loaded when loadcomboBoxes sub is executed.
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Apr 21, 2009
I have simple columns and their respective sums. However, I exclude 1 particular value from each sum, like so [code]...
Now I need to exclude another value ("Awaiting Progression") from a second column called "PROGRESSION".
Since I already exclude value based on 1 column called CATEGORY, how do I change my =Sum(Code.ExcludeOthers(Fields!CATEGORY.Value,Fields!ACTION_PLAN_NEW.Value)) to exclude a value from the PROGRESSION column if it's = ("Awaiting Progression") ?
i.e. How do I exclude multiple values, depending on values in 2 columns in SSRS 2005?
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Aug 2, 2009
I have four textboxes that only accepts numeric data.On each box is a corresponding checkbox.I want to have a button that will get the total sum of all textboxes wherein their checkboxes are on checked state.
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Jan 20, 2012
I am looking for an elegant datatype and method to handle this problem below in Java or dot Net environment (C# or VB.net)It is a (r x c) matrix of numbers (integers). The 1st column values is a 1D array (range of numbers). The 2nd column takes a different range of values for each of the 1st column value (so, its basically a 2D jagged-array). The 3rd column has a range of value for each pair of 1st and 2nd column values.(when the 1st and 2nd column is fixed with a value, the 3rd column takes a range of values). The number of columns is not fixed and depends on the user input. It can go up to 20 or even more
How do you handle this problem efficiently in java or C# or VB.net.I am linking an image to the equation that I want to program. , in-which C and S are some constants. i=1,2,3...r (number of rows) and k-1=0,1,2,3..c (number of cols). The range of R(i,k-1) depends on maximum and minimum values and MAY also depend on previous values from R(1,k),R(2,k)...R(i-1,k-1) according to the equation. The initial known values are fixed integers (not in a range) for R(1,c), R(2,c),...,R(r,c)
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Dec 14, 2010
I'm having a problem how to refresh the aplication so that the tray icons changes when reading a txt file that is actualized in 5 to 5 minutes.
Imports Microsoft.VisualBasic
Module Module1
Public Sub Main()[code].....
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Dec 4, 2009
I was useing VB a lot for some years ago and now I have started again..then, think I was useing VB3 or VB4 there was a property on ComboBox and listboxes that allows only to select the values in the Combox.. Not able to write own values..
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Jan 10, 2010
This is so confusing, i've been trying all day but it doesn't seem to work.
IN my database i have Vendor tables, i have 2 records
VendorName
a
b
I'm trying to get the comboxbox to get "a" and "b"
[Code]...
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Nov 7, 2011
I have an XML file, and a ListView control shows the data through aDataGridView control as shown below.Now,This Japanese web site helps me understand how to get cell values.And I'm trying to populate ListBox and ComboBox with the values from ListView's
Column 2.
For j As Integer = 0 To ListView1.Items.Count - 1
ComboBox1.Items.Add(ListView1.Items(j).SubItems(1).Text)
Next j
[code].....
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May 29, 2010
i am developing vb.net windows application. i have a combobox. In that i added items in its properties as follows
<- - - select- - - >
school
hospital
office
others
when i run my application i need to display the selected item as "<- - - select- - - >" but it display empty.....
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Nov 28, 2009
Im trying to set values for every combox item for example if I have an item name of "currentyear" it should return the year.
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Mar 20, 2010
I want to setup values for a combobox in vb.net through code. But I don't know what's the code for setting it up. I want to do something like this:
if combobox1.selecteditem="1" then
combobox2.values=("x", "y", "z")
end if
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Nov 6, 2009
I display some values in a combobox that come from an array.By default the selected index of the combobox should be the first item.
If cboAtt.Items.Count = 0 Then
For i = 0 To nums(att)
cboAtt.Items.Add(cat(att)(i))
Next
[code]....
This works perfectly, but now I want the combobox to display the new (initial) value that is swapped, except than when I do that the cboAtt_SelectedIndexChanged event is triggered which results to an infinite loop --> crash.
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Oct 24, 2009
Is there any way to type a value to comobox which is not on the list of item in the combobox I have tried but it always throws an exception
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Oct 27, 2010
Here is my code.
for example TextBox1.Text= 12,34,45,67,67
Dim process_string As String() = TextBox1.Text.Split(New Char() {","})
Dim process As Integer
[Code]....
i want to add values in reversed order in combobox2 that are available in combobox1
but when i run the application the second combobox remains empty and not showing any value.
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Mar 17, 2010
When I update but do not really made any changes to the value and press the update button, the data becomes null. And it will seem that I deleted the value.I've taught of a solution, that is to add both combobox1.selectedtext and combobox1.selecteditem to the function. But it doesn't work.
combobox1.selecteditem is working when you try to alter the values when you update. But will save a null value when you don't alter the values using the combobox combobox1.selectedtext will save the data into the database even without altering.But will not save the data if you try to alter it.-And I incorporated both of them, but still only one is performing, and I think it is the one that I added first:
Dim shikai As New Updater
Try
shikai.id = TextBox1.Text
shikai.fname = TextBox2.Text
shikai.mi = TextBox3.Text
[code]....
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May 1, 2012
I'm using ms access 03 to fill a datagridview no problem. I have 4 fields(id, first, last, points), but I just want to fill one in a combobox I have. Here is what I'm using to fill the datagridview:
Dim con As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsPC #6My Documentsstudent.mdb")
Dim sql As String = "Select first,last,points from student"
Dim oledbAdapter As OleDbDataAdapter
Dim ds As New DataSet
[Code] .....
How could I get a combobox to just display just one field, like idk if I'm explaining myself correctly, like a SQL statement look like this:
Dim sql As String = "Select first from student" but just for my combobox.
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Mar 7, 2011
Is it possible to have a different selection of values in the 2nd combobox depending what was picked on the first combobox? For example an American state is picked in the first combo box and the second combo box loads the cities in that state? I'm just using a basic form in Visual basic 2010 there is no database behind it.
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Jun 3, 2011
My code is:
sqlsub = "SELECT distinct field1, field2"
sqlsub += " FROM tbl I
Dim da As OleDbDataAdapter
Dim lsdataset As New DataSet
[code].....
My prob is how should I bind the combo with field1+"("+ thpr+ ")" thpr is the string i get from function by passing field value 2 from query my combobox should be displayed as field1 + (thpr).
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Nov 4, 2008
I want to check if two combobox values are equal. The comboboxes are in a datagridview.I found you need to use datagridview_EditingControlShowing to add a handler to the comobo boxes for selectedindexchanged. I can do this with this code.
Code:
Private Sub dgridRegisters_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgridRegisters.EditingControlShowing
Dim combo As ComboBox = CType(e.Control, ComboBox)
[code]....
However, the message box comes up for every combobox in my datagrid when I change the index, not just the cmbPort2. I would like to have something like this...
If cmbPort1.selectedindex == cmbport2.selectedindex then
'do something
endif
..but it doesn't seem possible.
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Jan 22, 2009
How I could go about checking a typed value in a combo to the values in the combo box. I am making a system to select lockerID and Supplier ID I want the user to be able to enter the value in the combo box as well as select the value form the list in the combo box. Here is the code I have been trying.
If cboStockID.Text = "" And cboStockID.Text <> cboStockID.Items.ToString Then
MsgBox("Please enter Stock ID")
Exit Sub
ElseIf cboSupplierID.Text = "" Then
MsgBox("Please Enter Supplier ID")
Exit Sub
End If
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May 19, 2012
the combox is bound database table,but it is not displaying the contents of table in database,instead it is displaying corresponding null values(blank).it is showing just "select" and the blank spaces corresponding to the number of items in database
here is my
Function combobfill() As DataSet
addconnection.Open()
Dim selectstring As String = "select materialsname from materialtype_table"
[Code]....
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Jul 9, 2009
I have a form with a number of controls based on those controls and a database i filter what data i want to be in AllowableHeightsCombobox. I am using an Arraylist to hold the data. The problem i am encountering is that after filling allowableHeightsCombobox once, it will not update or change the values in it. this is the only place where i change the AllowableHeightscombox's datasource.
[Code]...
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Jul 13, 2010
In a VS2008 VB project, I have a combobox that gets its values from a SQL Express table. This table has three columns. I want to display the value from one column in the combobox, and obviously the user will select from this. I want to then write the value of the selected record from a second column back to a different table, and I also want to change the value of a radio button (on the same form as the combobox) based on the value of the third column of the selected record.I'm setting the ComboBox.Text value to be the first column, the ComboBox.SelectedValue to be the second column, but how would I change the radio buttons in the most efficient way? If it was VB6, I'd probably make another trip to the database to find the value of the third column based on the selected value from the combobox. I'm not familiar enough with the tableadapter concept but I suspect I should use them to do what I need.
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Mar 26, 2010
Is possible to have different values of combobox on the multi same form?
Actually I want to make a multi same form, but with one combobox to set the authority. When different persons to use this same form, I will have different selection limited on this combobox,
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Jun 6, 2011
the code display 2 colunms in one combo box from a table. i have table with 2 columns account_type and account_name. the account_type is an abbreviation(codes) which would be stored in a new table when selected. I want the code when the combo is click, would display the code-account_type and account_name in the same combo box.
Private Sub cboAccount_type_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboAccount_type.SelectedIndexChanged
Dim cn As New SqlConnection(ConnectionString)
Dim query As String = "Select Concat(Account_type, ' - ', Account_Name) As AccountDesc, Account_type from Accounts"
[code]....
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Feb 13, 2009
I want to fill a combobox with the values that I have in a datatable. How can I do that? Below is the code for the population of the datatable:
[Code]...
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May 5, 2012
I'm trying to fill a ComboBox with values from a column in a database.I'm trying to use code I found in jmcilhinney's CodeBank post at url...credits to him since it's basically 100% his code in my image below I've tried 4 methods before this, and I've been receiving the same error, so it must be my fault.
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Jun 3, 2010
I want to create a combobox that contains a list of items. I drag and drop a combobox and to the collection property I put the items.My items are all the months(January,February,March...) but i want to give to each item a value from 1-12 and I don't know how...do I have to create the combobox with code to achieve this?
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May 4, 2010
I would like to how I can load a set of values in a comboBox from a TableAdapter. I have the tableAdapter method to read the data , (in this case GetDataByStreet)--> Me.StreetsTableAdapter.GetDataByStreet()
But I don't know how to assign the sentence to the comboBox, in order to load the data set in it.
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