new to VB and having some problems with my code.the story is that while marking items in comboBox1 need to pass values to 3 different comboBoxes so far I have made code that pass data only to one comboBox. [code]
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how to add items in combobox1 that will be saved....this pattern isn't do the way i want...Form2.ComboBox1.Items.Add("test") because after i close the form2 it would be back to nothing...is there a code that will do this? because it works only in design view...in items then collection..
View 4 RepliesI am really baffled and can't work out why this is happening. I have this code with transfers text from a textbox and adds it to combox items. My problem is that after the combox has got 2 items init, anymore you add there will be muliple of them and not just one for example:
[Code]...
WebClient.DownloadString("URL/File.txt")
How to add each from file to comboboxe's item?
I have a button called 'populate'. I need it to randomly select items in combobox1 when I click it. Here is what I have tried doing but it doesn't give me the desired results.
Dim sacostofsyscheckout As Integer
Randomize()
sacostofsyscheckout = CInt(CInt((1500000 * Rnd()) + 3000000))
[Code]......
I have added 2 Combobox on form. Combobox1 and Combobox2. I have connected databasetable to Combobox1.
i.e. Showing items of Combobox1 from database table column A.i.e. displayed one column of databasetable in Combobox1.Same way I have connected same databasetable but different column B to Combobox2.
So,What I am trying to do is :Once the form is set up for run then I click on Combox1 item Then I want Combox2 to display only the item of B column that is in the row of column A ( selected item in combobox1).
Is anyone able to understand my question here?If u have understood then do reply If my question is not understandable then let me know what part U din't understand so that I can elaborate
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?
View 4 RepliesI 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] .....
I have 8 comboBoxes and 8 identical items in each comboBox.If I select one of the items in comboBox1, how can make this item to disappear from all other comboBoxes ?
View 8 RepliesI'm program that uses quite a few different comboboxes. Essentially drop down boxes to prevent invalid user input. Anyways, the problem I've run into is when I'm loading files that will populate those combo boxes. Essentially, certain selection in the combo boxes invalidate selections in other boxes. What I'm doing is taking a text file, and reading it line by line. Each line is based off the combo box selections previously made and saved using the same application. Returning to the same screen, I want to populate the combo boxes with the data previously selected.
I'm initially populating the combo boxes in program with
<combo box>.Items.Add()
Other than searching item by item for the proper text, getting the index of of that text, and then setting that as the selected item?
So what I'm thinking of doing is this...
Dim Fin As System.IO.StreamReader
Fin = System.IO.OpenText(FileName)
Dim sInput As String
Dim iIndex As Integer
[Code] .....
I have a list of a few 1000 names, which I need to load in several comboboxes. Now I can add them manually in the editor, but then the code would be huge, which is unneeded in my hones opinion. Sure I can add then in a database and load them, but that takes more time then loading a file from the hard-drive.
View 9 RepliesHow do i can make combobox list to be File names like:
[Combobox1]
- A.txt
- B.txt
- C.txt
I want Combobox list to be files from my webserver [URL] and i want it pickup them example if here is NERD.txt i want it pickup name NERD.txt from my webserver and include it for a one of the list items.
I have 16 comboboxes with a naming convention of:
c1d2
c2d2
c3d2
c4d2
c16d2
These will all contain the same items and I need to add them at runtime. I know how to loop through the controls, but not sure how to make sure I'm only editing the correct comboboxes. (I will have to do this for 2 more sets of comboboxes with similar naming conventions as well)
I'm working on a program in which I have 2 comboboxes and have to be able to add new Items in both of them, now that all no problems at all but as soon as I close the program I loose all my Items. Is it possible to add a code which checks if an Item already exists and if so give a error message and don't add the new Item to the combobox?
View 4 Repliesim just wondering if its possible to save the current state of a combobox,for example there are two combo boxes, i selected "3" on the 1st one and "apple" on the second one, is it possible to save that setting so that when i open my program again..i can load that settings?..
View 7 RepliesI have multiple combox boxes,
A B C
Combobox B has items Fruit, Veg, Dairy
Combobox C needs to contain 3 list and depending on what value is selected in Combo Box B.
For example,
If I select Veg in Combo Box B, I would like to have a drop down list containing "tomatoes, lettuce, onion,..........."
If I select Dairy in Combo Box B, I would like to have a drop down list containing "Milk, Cheese...................."
I'm using VB 2010 and I'm trying to use combo boxes on a current project but I'm not familiar with the code. I would like to set values to certain options in the combo box.
For example, if inside the combo box I listed the options:
Dog
Cat
Bird
I want dog to be set to = 1
cat = 5
bird = 12
To go further into depth, the code probably looks something like:
If cat.selected then
pet = 1
I f I have 1 combobox then my SQL query will be:
Dim objConnection As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source = C:DB.mdb;Jet OLEDB:Database Password=Pass1;")
Dim objdataadapter As New OleDbDataAdapter("SELECT DISTINCT LOCATION FROM Table", objConnection)
Once again I have hit a brick wall here. I have a combobox in which the user types the server name and then clicks on button 'CONNECT' to populate the next combobox which contains all the databases in that
server. Then after the user selects a database, I have another button that he/she click and I want to retrieve file groups from a specific table. At this point when he/she clicks on that button I get an error: "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)"
[Code]...
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.
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]...
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]....
My application security from piracy depends upon fields in my databases. User has to activate the application, that writes Bought in my database. But the problem is if a new user installs my application and replaces all databases from some one who has bought key, the application also becomes active without buying key from me.
Is there any possibility that I could mark the databases to be recognized with the particular setup?
I've picked up some code from a colleague, and in one of his methods he has a boolean parameter: ByVal showProactiveChases As Boolean?. I had to look up the ? operator yesterday to see that it denotes a Nullable type. My question is, if I change it to: ByVal showProactiveChases As Nullable(Of Boolean), does the meaning remain the same? I think provided it doesn't change the meaning the second way is much more readable.
View 4 RepliesToSerializable is it possible instead of marking a Class with the <Serializable()> attribute?
as in the following Class.So you could maybe do:>>myObject.ToSerializable
<Serializable()> _Public Class ExampleClass
End Class
I have a datagrid in my VB form. I want to lock in a way that you can not mark any cells in the tables etc.
When I set it to read only I stop the edit function but you can still mark the cells with a cursor. Is it a way to avoid that from happening?
I had a need to mark a listview row if filenames were duplicates for n number of characters from the left. I wrote the following but it smacks of VB6.[code]...
View 5 RepliesI want to make a program that control powerpoint slides
for example, when I start power point in presentation mode
as I click the button, then slide goes to next. And when I click one more, then go next slide.
I don't know how to send message to powerpoint in VB.
I am in the process of creating a program that needs to pass some information to another program. The program that needs to receive the data is meant as an update program to the first. I send a new copy of the host program over the sockets connection, then I need to pass the file name and location to the update program. After this information is sent the host program will quit so that the update can overwrite the host with the new version. The the update program restarts the host and everything goes on like normal. I have everything all-ready in place, except for passing the file information. I could just save the information in a text file and read form this, but it seems messy and illogical.
View 6 RepliesI have developed an active x control and signed it with certificate. I know that digital signing is needed , so that the browser knows that the active x comes valid source.My asp.net form has a button , which invokes a method on activex control as -[code]....
But it errors on browser stating that the - IE has blocked this site from using an active x control in an unsafe manner. ( Please see attachment).So should I have to develop the active x control which implement IObjectSafety and also signed digitally, so that it can execute on client browser without any warnings from IE. Any examples.
