When Does DataBinding Occur For Drop Down Lists
Jun 12, 2012
Here is my drop down list and data source. My question is.. when is it possible to set a defaulted selected option for the drop down list, aka when have all the dropdownlists been databound and their ListItems populated? I have tried Page_PreRender, age_PreRenderComplete, Page_Load.I have read over MSDN's Page Life cycle event which suggest Page_PreRender.
<asp:DropDownList ID="ddlRampStandard" runat="server"
DataSourceID="RampStandardDataSource" DataTextField="StandardName"
DataValueField="StandardName" RepeatDirection="Horizontal"
[code].....
View 1 Replies
ADVERTISEMENT
Apr 5, 2011
I am fairly new to VB (have done some VB in excell, but its a bit different)
I have a couple of questions:
1) How do I populate a dropdown list from a Database Row 2?
2) When I create a Database from Acess, where do I save the database? and If I build the exe program later on, will it include the database, or how does it work? I feel completely stupid, but one of the best ways to learn is to try over and over again
View 2 Replies
Oct 31, 2011
I'll try to clarify by using the following example. In here I have two Drop down lists (ddlInsertEmployee + ddlInsertCustomer) which should both be bound to fetch data from tables [Employee.EmployeeID] and [Customer.CustomerID] and insert it into table [Task].
The problem is that it inserts data from Employee.Fullname and Customer.Fullname into resp.Employee.EmployeeID and Customer. CustomerID.If I would change the Drop down lists to textboxes, and manually insert the IDs, it works like a charm, but this is not very efficient, I want to be able to see the entire Fullname.how to change my Sqlstring in order to make this work correctly.
Imports System
Imports System.Collections.Generic
Imports System.Data[code].......
View 1 Replies
Nov 20, 2010
I'm using Visual Studio for the first time and VB. I have programed for awhile, but mostly new to windows related softwares. I have an access database connected to my test application and I am trying to display a drop down box with a listing of the item names in my table and the value that is sent off to my database is the actual item id. I can figure out the database part in terms of adding and editing, but I haven't been able to figure out how to display the full list. If I click the next button the list that is generated it displays the next item, but I would rather just list all items in the drop down box and remove that toolbar all together.
View 1 Replies
Aug 10, 2009
I need to show a drop down list when the page loads, the default selected value is nothing, or an empty element (such as "-"). When the user selects one value from the list, another drop down list is added below the first one, and so on.My problem with this is how you make the page to remember the drop down lists created through postbacks and the values they have selected?
EDIT: I did this example for dynamically add drop down lists and suscribe them to an event handler but the event won't fire.
EDIT 2: Changed the code because I labelled for VB.Net and posted something in C#. I update the code with some trivial improvements, but still won't fire the event :(
Private myDdlArray As New List(Of DropDownList)
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If (Session("ddl") Is Nothing) Then
[code]....
View 4 Replies
Apr 16, 2010
I have a series of GridViews in a Tab Panel - databound to a generic List of Business Objects.
The columns in the Gridview are all similar to the following:
<asp:TemplateField HeaderText="Company" SortExpression="Company.ShortName">
<ItemTemplate>
<asp:Label ID="lblCompany" runat="server" Text='<%# Bind("Company.ShortName")
[Code].....
View 1 Replies
Dec 1, 2010
I have a couple drop down lists connecting to an Access database. I can get the first drop down list to populate with the departments I have listed under "dept" in my access file. After someone selected a "dept" i want the second drop down list to populate with the names ("name"). Right now the second dropdown list is showing up but isn't poplulating. What am I doing wrong?!? I would like to include a third dropdown list for another selection with a button to then show things from the specific selections. Right now, I just need to figure out how to populate a list upon another lists' selections.
View 1 Replies
Oct 20, 2010
ok, I'm basically trying to make mulitple drop down lists on my form. When the page loads, I can get my main dropdown list, called makelist, to fill in with the items that I want from a txt file.
What I'm trying to do is whenever the selectedindex is changed in makelist, it has to load a different dropdown list, called modellist with items from a different txt file.
[Code]...
View 13 Replies
Apr 15, 2009
I've written a program to work out the flight distance between a set of seven cities around the world using a 2D array but was wondering how I would if possible go about having the values for each city selected via two drop down lists (say start city and destination city).
Public Class frmDistance
Private Sub Flightdist_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim rowcolumn(7, 7) As Integer
Dim sr As IO.StreamReader = IO.File.OpenText("Distance1.Txt")
[code]....
View 1 Replies
Oct 5, 2011
I have two list boxes. A users selects a value from each, clicks a button and the application creates a relationship between the two selected items by saving them in an array and displaying the relationship in a third list box.
What I want to allow is for users to be able to drag a value from one list box and drop it on top of another value. I have the code to capture the value of the item dragged but I don't see how to capture the item that the data is dropped onto.
Is there a way to capture the targeted selected item?
View 2 Replies
Jun 2, 2009
I've got a couple of drop down lists for languages. I bind them to a language list that comes from a query. Then the fields are also bound to the row in the DB they relate to. I have several panels with the language drop down - each "tied" to a different table in my DB. When I call up different records on the same panel the drop downs immediately "set to the position" of that rows language in the list. But when I call up another panel - tied to another database table - I see that language in the drop down.
[Code]...
View 9 Replies
Jun 17, 2012
I'm using vb.net. Basically, I have a drop down list, text box and a submit button. You choose a movie director from a drop down list, then type in a movie, click button and it adds the data to my database.There's another button which hides/shows drop down list, text box and submit button using Visible = True and Visible = False, but what I don't like about it is when it hides the things I said before, it leaves some white/empty space like if they are still there, but not visible.Is there anyway to put some kind of holder/container and place a button which when clicked could add my drop down list, text box and submit buttons to that place?
View 1 Replies
Feb 19, 2011
I have a gridview which can be filtered from one or more values in a querystring. That all works great: e.g. "?subject=Maths&authorName=Bond_James&type=Magazine" The values passed to the query string come from 3 drop down lists: Subject, Author, Type.What I'd like is when the user presses "Filter" it will take the selected values from the drop down lists and pass them to the querystring - it could be 1 value, 2, or all 3 (like above).
The drop down lists have an item called "All Subjects" / "All Author" / "All Type" each with a value of -1. The idea being that if the user leaves these items selected then the Filter button just ignores them.
Here is my code so far:
Protected Sub buttonFilterGo_Click(ByVal sender As Object, ByVal e As EventArgs) Handles buttonFilterGo.Click
Dim queryString As String
Dim selectedAuthorString As String = "author=" & dropAuthorList.SelectedItem.Value
[code]....
Also, one more thing. How do I get the drop down lists to have the filters selected when the page re loads?
EDIT: I changed the default values of the drop down lists to "" - this leaves the URL looking messy though ?author=&subject=&type= This works, is it the best way?
View 2 Replies
Mar 12, 2010
I have four drop down lists here and I've assigned the datasource and displaymemberproperties so they are populated by a table. When I run the program and select a choice, all four of them get updated with the new choice.
View 3 Replies
Apr 1, 2011
I have two lists. One list is a list of names, the other list is a list of how many times each name is found in the first list noted in the database
so...
Nick
John
Jim
Jack
is the firs tlist
10
13
13
2
is the second list. Nick had 10, john 13 and so on.I want to sort the second list from large to small, but have the index for the first list still linked to the correct amount of calls.i do it this way so I can
for x = 0 to num_of_names
string = lst_name(x) & "-" & lst_count(x)
next x
View 3 Replies
May 20, 2010
I know how to check whether an item exists in a list using (MyList.Contains), But I do not know how to check the whole list. For example (use one button and one richtextbox):
[Code]...
View 14 Replies
Mar 15, 2012
In my application, i have put a question on form closing if the user wants to save the changes?. But right now, i have just put it in default whether they make changes or not.I thought of prompting it on text change.. but the text automatically changes on load as it retrieves data from sql server.
View 15 Replies
Mar 25, 2012
What is the code that I can use to describe what happens when there is not just one exception in a'Try...Catch..Finally...End Try' statement? For example: 'Catch' is used to describe what happens when a certain exception occurs, but what can I use to describe what happens when a certain exception does NOT occur?
View 11 Replies
Nov 27, 2010
Is there some interface I can implement to allow basic comparisons and math to happen as it would an integer?
For example, let's say I have the following class:
Public Class Something
Public SomeBigNumber as UInt64
End Class
I would like to do something like this:
Dim SomethingA, SomethingB, SomethingC as New Something
....
If (SomethingA-SomethingB) > SomethingC Then
'Do stuff
End If
I was hoping to be able to implement some interface (if that is even the right term for it) that would return the UInt64 contained in the class for comparison and math, if possible.
View 1 Replies
Oct 22, 2009
me and a partner need to play sounds when certain events occur, however, every method we try..
My.Computer.Audo.Play("file.wav")
or?
Sound.PlayWaveFile("file.wav") from this class: http:[url]....etc they all don't work
They do NOT throw any exceptions, they just dont play the music, the test demo of the Sound Class works like a charm, its just not working in our project..same with My.Computer. Audio. Play.what could we have done to make it so that we can't play sounds from our application?
PS: this problem occurs on all of the computers we test it on, yet the normal sound-playing methods seem to work on all of those computers when they are implemented in other projects.. its just not working in these instances
View 5 Replies
Dec 11, 2009
Private Sub done_Click(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles done.Click
Dim s As Integer = ComboBox1.SelectedIndex
Dim t As Integer = ComboBox2.SelectedIndex
Dim x As Integer
[code].....
When i go for r <> 0 then it occur twice.
View 16 Replies
Feb 11, 2012
I am making a program that is sort of a frontend to all my other apps. I put the EXEs of those apps into the resources of my frontend. The problem occurs when I try to run the EXEs from memory.
I keep getting System.Reflection.TargetInvocationException on the line:
entryPoint.Invoke(RuntimeHelpers.GetObjectValue(objectValue), New Object() {New String() {"1"}})
[code].....
View 12 Replies
Apr 10, 2010
I am trying to create a background worker that will spawn a dialog, while a long event is occurring. For example, when the main thread in trying to connect connect to a db and update a large amount of records, I would like to have the background worker spawn a dialog that advises the user to "Please Wait"
Here is what I have so far
1. I create a background worker using the drag and drop
2. Before the event that taking a long time starts I call:
Me.BackgroundWorker1.RunWorkerAsync()
BackgroundWorker1.WorkerReportsProgress = True
3. This is the events for the bgworker, all of which was enabled in the form designer:
Private Delegate Sub delCreateNewForm()
Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
Dim d As New delCreateNewForm(AddressOf CreateNewForm)
Me.Invoke(d)
[Code] .....
4. When the long activity is completed I call this:
BackgroundWorker1.ReportProgress(0)
Everything seems to work fine, except that the newly spawned dialog in no responsive and appears to be frozen, until its closed by the Progress Changed event.
View 6 Replies
Feb 5, 2009
If I change something in my visual basic, and start debugging, nothing changes to the program I made. Wether I save or not, it's just always the same.
Secondly, I would be very glad if somebody could give me the codes for a
"Create User" button. So it saves in C:Program FilesAcc.txt
And if you created one, you can login with it after that.
View 11 Replies
Apr 4, 2009
how do I refer to a panel. i,e. i have 5 panels in total, and based on specific inputs , i want changes to occur in specific panels(each stored in a tab). So, now how do i give the control to the rspective panel ??
View 1 Replies
Jul 29, 2009
how can you schedule a task in VB application to occur only in 24 hours. let's say every 11:25pm
View 1 Replies
Jun 1, 2012
I have a DataGridView control in my windows form application. What i want to do is this: I want to reload the view so that it shows the correct data when a change occur to the database table that it is bound. In other words, when i delete a record, using an sql query not the DataGridView1.Rows.Remove(DataGridView1.CurrentRow) property, i want the changes to occur to the datagridview also. For example: I have a customers table that is bound to the datagridview. When i delete a record, lets say the one with ID=5, i want the row to be removed from the gridview in run-time. Is this possible?
[Code]...
View 1 Replies
Aug 21, 2011
[code]Is it necessary to close object when exception occurs? if yes please correct above code i m confused where to close the response object
View 3 Replies
Nov 19, 2009
i want to know what are the methods in order for me to extract the information that is stored in the exception. i also would like to know how do i extract the code line that caused the exception to occur.
View 6 Replies
Mar 29, 2009
I have made an app that the user has to type a number, and i want the process for the app to do this how evermany times the user wishes it to do.
for example, the app is ment to create a line in a text document, so they write in textbox1 what they want written on the line, and then in textbox2, tey say how many lines they want to create.
So,
TextBox1.Text = "BLAA"
TextBox2.Text = "782"
It will create 782 lines of BLAA. not just one...
View 2 Replies
