I use the following statement to shuffle the data in a range (for example 1 to 10) and result is stored in a combo box.
Dim RndSQs As New Random()
Dim ArNumbersSQs As Integer() = Enumerable.Range(1, Val(txtSQs.Text)).OrderBy( _
Function(x) RndSQs.Next()).ToArray()
[Code]....
How can I shuffle that data which is already in a combo box but not in a range. These nos. can be random no. that user shall chose.
I use the following statement to shuffle the data in a range (for example 1 to 10) and result is stored in a combo box.[CODE]....
How can I shuffle that data which is already in a combo box but not in a range.These nos. can be random no. that user shall chose.
I found some VB6 code over here to get and set icons on the desktop.After converting it to VB.NET and making some minor modifications it should simply save the icon's locations at startup into an array of POINT structures, set all icons to random locations when a button is pressed and put the icons back when the applications exits. When I start the app all icons dissapear and nothing happens when the button is pressed or when I exit (I can get the icons back by aligning them by grid).The VB6 to VB.NET converter gives me a warning when i try to marshal the POINT structure saying that i need special conversion for marshaling non bittable types.
Here's the code:
Imports Microsoft.VisualBasicImports Microsoft.VisualBasic.Compatibility.VB6Imports SystemImports System.Runtime.InteropServicesImports System.Windows.Forms
Imports Project1.Declarations
Friend Partial Class Form1
Inherits System.Windows.Forms.Form
[Code] .....
So as the name states; I am a newer coder.
This is the code i have:
Public Sub RandomNumbers()
Dim s(4) As String
Dim RandomNumber As Byte
I don't know if you can tell what I am trying to do here, so I will try to explain. I what to create for random numbers and place them into for different text boxes. I also would like to do this with combo boxes and their selected indexes. So if the combo box has 10 items in it; the new selected index would be the random number generated above.
Another program I am working on for fun, I am basically shuffling a list inside a listbox, what I want to do is delete the rest but not sure how to go through with that. At the moment I have this: [code] Just contains the code, declarations outside weren't included.So anyway, once clicked, it will call on the function to basically shuffle in a for loop, I was wondering if I should (or how should) create another function and call it in the click button or have just a loop in the click button so it deletes half the list. What I am doing is I have 20 list of items, I want the program to shuffle the items and then deleting the lower 10, meaning, if I had 10 items and wanted 5 top, I'd want: 0, 1, 2, 3, 4 and deleting 5, 6, 7, 8, 9.
View 7 Repliesi need to be able to compare data from a text file with the collection of a combo box.My algorithm currently populates the combo box with data from the text file on the form load event.I have included an update button that updates the combo box collection.[code]
View 1 RepliesI have 5 combo boxes that need to show the same list of items that come from a single dataset table. I have managed to bind the datatable to the combo boxes no problem at all.. but when I run the application and select an item from one of the combo boxes all the others change to the item I selected. After some research I believe that this problem is something to do with using the one datasource so I have tried assigning the dataset datatable to 2 different variables and used them as datasources for 2 of the comboboxes but the same still happens.
A work around to this I can see is to call the same methods and SQL select statements 5 times over to get individual datasources for each combo box but this doing that sounds crazy to me. how I can get around this easily? Code snippet below shows 2 combox boxes and their datasources. I'm using VS2005, .Net 2
ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList
ComboBox1.DataSource = AllergyListDataSet.Tables("ListOfAllergies")
ComboBox1.DisplayMember = "Condition"
[Code]....
I have a combo box with a data source. This box shows one column of a table and allows me to select one item.Next, I have an ordinary text LABEL that I need to put text from another column of the item selected above.I tried to set the data binding field of the label, but this grabs only the first row or data and shows the selected column. That is nice, but I can not figure out how to update the selected selected ROW when the combo box item is changed.In this case the combo box lists a bunch of inventory parts. When I select a specific part, I need the change the text in a label to show the manufacturer. (like a sub-form). This same behavior will be used in several other places, but the relationships can cascade.
View 4 Replieshow do i get all the data from a combo box and transfer it all to a label with a "," (comma) in between each item?
View 4 RepliesI am trying to get all the data from a combo-box in vb. Lets say the values are john, sarah, bob. I want to be able to write those to a text file like this:
John
Sarah
Bob
They were added using
combobox.add.item(sarah)
Is there anyway I can do somthing like this?
names = combobox.list.items
So I'm a bit stuck here just wondering how I could get data out of a combo box which has been bound to a datasource I want to retrieve an ID.
View 2 Repliesi have a datagrid. i populating it with data.
THIS IS MY CODE :
cmdSelect = New OleDbCommand(sql, conn)
daSelect = New OleDbDataAdapter(cmdSelect)
daSelect.Fill(dsCredit, "Credit")
count = dsCredit.Tables(0).Rows.Count
MsgBox(count)
[Code]...
which way do you think is best? Using connection As New OleDb.OleDbConnection(My.Settings.CustomerConnectionString & My.Settings.CustomerDatabasePath)
Using command As New OleDb.OleDbCommand("SELECT [customer] FROM [tblCustomers] ORDER BY [customer] ASC", connection)
connection.Open()
Using reader As OleDb.OleDbDataReader = command.ExecuteReader()
[Code]...
am using data grid to store the data in database now i have problem in data grid i have added a combo box when i add new row to database all values go to db except the value of combo box how to insert the value of combo box here is my code on btnsave
Dim con As New OleDbConnection(ConnectionString)
Dim cmd As OleDbCommand = New OleDbCommand("SELECT ITEM_ID,ITEM_NAME,DISCRIPTION,PUR_DATE,LOC_INST,MODEL_NO,DATE_ALLOC,QUANTITY FROM
[code]....
Sub CboSO_DropDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles CboSO.DropDown
If functionmode = "UPDATE" Then
[Code].....
How can I input data from a text file to a Drop Down List Combo Box.So far, I have:
Private Sub frmFlightDistances_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim srairports As IO.StreamReader = IO.File.OpenText("Airports.txt")
cboDepartureLocation.Items.Add(srairports)
End Sub
When I click on the drop down arrow, all that is available to pick from is Airports.txt.
I have a combo box on a form named cboGender, I am using a data reader to retrieve data into the combo box as follows[code]...
the value of Gender shows in the combo box if the Drop Down Style property is Simple or Drop Down. However if I set the Drop Down Style property to Drop Down List which cannot be edited, the combo box is empty.
(I'm using VS2005)Instead of using a bindingnavigator, I'm setting one field as a databound combo box with the display member and selected value set to the field.Then the other fields are text boxes and change based on the selected value of the combo box.The problem is that when I run the app, the form won't close.
View 6 Repliesgive me a suggestion to do the simple coding ofnon random data.....
View 1 RepliesI have a combobox that is bound to a BindingSource that contains a custom object with multiple Properties.
Is there a way to access a Datamember that is not displayed in the combo box and display it elsewhere. For example, When a user selects a name from the combo box, texboxes (or Labels) populate with Title, PHone, email, etc. All of this data is loaded in the custom object that is bound to the datasource so the info has already been pulled from the db and is in memory.
I am trying this..
Imports System.Data.OleDb
Public Class Form1
Dim conn As OleDbConnection
Dim cmd As OleDbCommand
[code]....
I get an error: object reference not set to an instance of an object
I have datagridview control with combobox as first column. I want to bind combobox to datasource.How can I do it?
View 2 RepliesI have a combobox that is databound to my webservice. Code works perfect.
[Code]...
My issue is I need to be able to call that function from another form. I have a form that I add a new customer with and want to refresh the data in the combo box, and select it has the selected item. How do I do this? I have tried several ways, and it just does not work.
[Code]...
I'm trying to bind data to a combo box but it does not appear to be working. I've setup the DataSet and the DataSetBindingSource and all this appears to be working, within the form design I can expand the little arrow in the ComboBox control and preview the data. This appears to be working but when the application is run, nothing appears in the drop down box.
I have the following code in place:
Code:
cmbSelectCompany.DataSource = ContactsDBDataSet.Company()
cmbSelectCompany.DisplayMember = "CompanyName"
cmbSelectCompany.ValueMember = "CompanyName"
[Code]....
Sub CboSO_DropDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles CboSO.DropDown[code]...
View 1 Repliesi tried a lot of variations in my code and even sql statement but still nothing happens.. i really need to do thing messed up project of mine and put all my efforts here.. but i really can't understand why my combo box isn't showing the names of the candidates w/ that designated position.. heres my current code:
constr = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source = " & Application.StartupPath & _
"SSC_Automation.mdb; Persist Security Info = False"
[Code]....
i am working on a university student council voting system and what i wanted to do is when the voter selected the radio button name "Vote by Party list" automatically the names of all the partylist that are entered in the databse will be listed in the combo box and all the candidates on that Party list will be shown on the individual combo boxes made for each position..
can someone please give me basic steps on how to hard code a combo box to display a column from a database?
View 21 RepliesIm trying to pooulate a combo box in vb.net 2008 with information from my access database, but I have no idea how to do thi :S im trying to get it so that the customer names from the database appear in the combo box this is as far as i've gotten for my form load.[code]
View 4 Repliesi wanted to get some information on how to insert data into sql server through combo box selection. i have 2 values in combo box. 1 is admin and 2nd is employee. basically its an employee registration form. if during registration the value is combo box is selected as employee to that value in combobox should be saved in sql server usertype field.
View 1 RepliesWhat I am "trying" to do is to take a combo box control on my form, and load it up with data from an access db, but I dont want them to be linked so that when I change the combo box to another value it will cahnge record data. From the pics attached I have manage to load the data into the combo box, but the 2 are linked and when I try to change the combo box it creates violations in the database as its trying to change the records.
View 3 Replies