VS 2008 Update/change Data In Listbox?
Jan 16, 2012
I cannot figure out how to change the data in a listbox. I'm being driven completely mad by vb.net, finding it very very complicated.
Ok I have two list boxes on a form that contain correlated data i.e. the first item in the first list box corresponds to the first item in the second list box.
Under the two list boxes I have two text boxes for data entry.
For Example :
LstTagDatabaseLoop LstTagDatabaseSource
TxtTagDatabaseLoop TxtTagDatabaseSource
I want to Add Update and Remove items from the list. If the user selects an item, I want the selected item in the other list to change to correspond. I also want the two text boxes to be udpated with the currently selected item.
[Code].....
however this invoked the selectedindexChanged sub umpteen dozen times and while in the end it did actually update the data, its obviously not the right way.
I found ListViews which perhaps is more appropriate but I couldn't get my head around it at all so returned to trying to use these listboxes. Is there a different object I should be using.
I'm finding vb.net to be too complicated for a hack programmer like myself...
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Feb 12, 2011
I am trying to update the values in my listbox as the user changes radio buttons rdMachineHome or rdIncremental. Are there any shortcuts or do I need to write everything over as an option?
Private Sub rdLength_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles rdLength.CheckedChanged
Dim Length As Decimal
[code].....
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Apr 7, 2011
Why is it sometimes when I update a data using da.update(ds), the data sometimes didn't update or change... for example i want to change the name or number n a record, sometimes there is no changes..
[Code]....
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Jan 15, 2012
I have a form where i can enter new product. In that same form i have listbox where i show the current product from the database.
I want to know how to update that listbox as i enter new product into the database so that user can see the current content of the product table.
my code to load the listbox
Try
Dim ds As New DataSet
Dim cmd As New OleDbCommand
[Code].....
To sum it up, what i want is something that will refresh the current display of the listbox so user can see the actual and updated contents of the database.
with the above code, the newly entered product/data can only be seen when the program is closed and reopened again. Which is not very convenient.
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Jun 1, 2012
I have the following code to try and change a field in a Microsoft SQL database. I don't get any Exceptions when processing the code but I use the Microsoft SQL Management Studio to view the data before and after but the data does not change.
myDataAdapter.SelectCommand = New SqlCommand
myDataAdapter.SelectCommand.Connection = New SqlConnection(myConnectString)
myDataAdapter.SelectCommand.CommandText = mySqlString
[code]....
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Nov 11, 2010
I'm using a MS Access 2007 database. I modified the field definition of one of the fields in a table, it a text field and I change the maximum length from 40 to 150. I have a data source in my app that contains this table and many others. I refreshed the data source but the change didn't take affect. I went through configure option but the change still didn't take affect. It gives me this error,
The value violates the MaxLength limit of this column.
If I add/delete a database field the data source is updated when I go through the configure process. I finally just deleted the table from my data source and then added it back.
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Mar 25, 2010
My problem with my project so please help me about I am enclosing my project with problem very simple but I can't found. I am using text box and listbox last two textbox i.e. txtlani and maskedtextbox.
Now the problem is when the user put the data into above mentioned two text boxes for the selected item of the list box I want to change the back color and If the user wish to leave blank that two text boxes then no change at all in the list box selected item.
In short that if Textbox leave blank then no change in the selected item back color if in the Textbox have some value than selected item back color change.[code]....
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Mar 11, 2010
i am currently developing a reservation system which has a map locator using visual studio 2008. when the user click in any of the amenities available and a transaction was completed, the color would change. I was able to change it but if you check it for the monitoring, the amenity with completed transaction doesn't change color. my prof said that i have a problem with filtering the data with the date.
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Jan 24, 2010
I have a standard DataGridView. One of the columns is a DataGridViewComboBoxColumn. When I select one of the ComboBox items, I want to trap the change and add additional columns based on the item selected in the ComboBox. I've tried using CellValueChanged for the DataGridView column, and a bunch of other events, but none of them is fired when the DataGridViewComboBox value is changed. What event can I trap to make this happen? Right now as I said, I am using CellValueChanged, but of course the event doesn't fire until I click on another cell...
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Jul 21, 2009
In the event of SelectedIndexChanged() I need to updated text of an item that is highlighted. If I remove it and .SetSelected again, this event will be entered repeatly. So how to update the text of this item in this event without deselecting and re-selecting it?
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Jan 18, 2009
How can i change the order that the items are added into the listbox? This is the original order:
[Code]....
And so on... What i want to do, in other words, is for the newest added item to be at the top of the list.
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Feb 24, 2012
i successfully load data from database to listbox, what i want to do is to add a record and then directly the listbox will update as well as in the delete.
[Code]...
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Jul 3, 2009
I have a gridview in which when I click edit, update, and cancel button comes. I have a variable named status. If status=false then update should change to insert and if status=true then update should be update itself.
<asp:TemplateField >
<ItemTemplate>
<asp:LinkButton ID="lnkEdit" runat="server" CommandName="Edit" Text="Edit">
</asp:LinkButton>
[code].....
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Oct 30, 2009
I am getting an error on my form "String or Binary will be truncated".I want to do a quick display of all of the data that is going to be updating when the app gets to: Me.taClientMast.Adapter.Update(Me.dsMain, "ClientMast")Is there a command where I can get it to show before the error?
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Jan 26, 2010
I am writing a signout program in vs2008 using an access database.I have created forms and can call student and equipment info from the tables.I got the sign out part working and can add data rows to my table containing that information now I seem to be stuck in a stupid place. Signing the equipment back in I call the record to fill a form now all I want to do is add the date to the RETURNDATE column and save the record back to the DB and I am stuck at that point and cant seem to find the answer on the web.
[Code]...
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Aug 6, 2010
I am making a TimeCard application and I got stucked.. Anyway, the program looks like this: the user inserts date,start hour and finnish hour into 3 textboxes. On the fourth textbox it will show how many hours he has spent. I am using StreamWriter to save the data to a .txt file. My plan is to make this program as simple as possible (no database, access etc.). So, my biggest problem now is how to add all data from textbox4 (the amount of worked hours). I was thinking, to save into a separate txt file the data from textbox4 and then with StreamReader to get it back into a listbox.. but then.. how to add all of them? Im out of ideas..
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Aug 16, 2009
i m unable to update data into my database in vb 2008. the changes are reflected in the dataset but they are not reflected in database. i have set the datasource's copy to output property to copy if new but it is still not working.
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Apr 27, 2011
I'm trying to update a data user using vb.net2008 and sql server management studio express for my backend. the error says "must declare the scalar variable "@username" here's the code .[code]...
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Jan 22, 2012
I'm actually making a library system and I'm having problems with my data not saving in the database. It does appear in the DataGrid but after I close the application and check the database, nothing's there. [URL]
Here's the code.
Imports System.Data.OleDb
Imports System.Object
Public Class AddBook
[Code]....
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Jan 20, 2012
My project is scanner for example. Then This is my code...
[Code]...
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Jan 17, 2012
Here is the code snippet
objCommand.CommandText = "UPDATE tblCustomers SET weight= @weight, height= @height WHERE id=@id "
What i want to do is the following:
I have a form and i want,by clicking the appropriate button, to update the height and weight values which have the specified primary key 'id'.
The primary key 'id' is of type IDENTITY.The problem is that the above code does not work. It says Must declare the scalar variable "@id".
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Nov 10, 2011
I have programmed gridview, where you Edit a row and then update it using link buttons provided on the row.But when a user has to make couple of edits on the same grid, it should be saved with one button click and one refresh to reflect updated data.
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Sep 28, 2011
how to store data from a listbox to the database in another form in vb 2008.. i have tried the pass value but it isn't working...
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Jul 24, 2009
I have a database and I was thinking about using either a List Box or Data Grid to show the data. Is there is another way of showing the data? Also, when the user 'double-clicks' on the data in the List Box or Data Grid then I would like the information to come up in a new form. I know how to show a new form but I don't know how to get the information from the one that has been clicked.
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Mar 4, 2010
I would like open form and only display data in listbox without ability to select record. How to do it?
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Apr 6, 2010
The form1 has a listbox which contains a list of student names.If i select any one of the student name in the listbox and i click the button,the form3 should be open & listbox in form3 should be loaded with the corresponding scores of the student name that is being selected in listbox of form1.The condition i used here is if the value of textbox in form1 is 1 then the dr(4) value alone should added to the listbox in the form3 and ;likewise it depends on the value in textbox of form1. ...FOR THIS I USED THE BELOW CODE
[Code].....
When i tried to run this code it is showing an error "Index was outside the bounds of the array" on the line that i highlighted in the above code.
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Jul 23, 2009
I have a program that is reading and writing to certain memory addresses to a particular application exe...
So I have a listview control with 4 columns and X rows
| Name | Address | Type | Value |
Name: Is just an identifier so the user knows what it is.Address: Is a specific memory address (eg 0058AFA0).Type: Type of value stored in the address (eg, 4 Bytes, Float).Value: Value to store in the address.Im looking for a way to go through each row, take the address and use this to read the value at that address and then update the value on that row
[Code]...
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Jul 1, 2010
I'm connecting to an acess DB, adding data works fine, but if I want to change data in an existing record it does not work nor trows up exceptions. What am I missing? I think the db is the one causing the trouble but I can not see how?
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Jul 28, 2010
My aim is to choose a value from Listbox1 and on Listbox2 I would like to display the corresponding value from a table in my database. I mean, when I select Product A from Listbox1 (which is getting its values from row "Model" in my database table), I should see its price on Listbox2 which is available in the "Price" row of the same table (and also manipulate this price in different places for calculation etc.) . I am not sure if the best way is using "databinding.filter".
Here is the code I have but I cannot making it work:
Dim dtCOP As New AmetailorDataSet.COPDataTable
Dim adapterCOP As New AmetailorDataSetTableAdapters.COPTableAdapter
adapterCOP.Fill(dtCOP)
[code]...
A small note: my aim was using a Richtextbox instead of Listbox but I am told that Richtextbox is not suitable for using with datasources.
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Nov 17, 2010
I am just wondering if there is any way I could copy a bit of text using whatever application, but having a clipboard application of my own to store all of those on a listbox? So if it possible, how can I catch a value when I the user copies some text? I could make a cool application that would be quite handy... is there any event that could catch the data when something is copied onto the clipboard?
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