Populate Drop Down Lists?

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

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Asp.net - SQL String Adjustment For Drop Down Lists?

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].......

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Drop Downbox Only Lists One Item?

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.

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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].....

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Asp.net - Dynamically Add Drop Down Lists And Remember Them Through Postbacks?

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]....

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Asp.net - Editing A Gridview Row With Drop-down Lists Gets Too Wide?

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].....

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Drop Down Lists Connecting To An Access Database?

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.

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Make Mulitple Drop Down Lists On Form?

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]...

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Populate A DataGridView From Multiple Lists Without Iterating Through Them?

Jun 30, 2011

Say I have three lists containing multiple objects. Lets also assume they each contain the same number of items. [code]...

Now say I have a dataGridView that I have defined as having three columns. Is there a way to assign the contents of each of the lists to each of the three columns (e.g. column 1 = myList1, column 2 = myList2, etc.) without iterating through each of the lists? I know I could define a dataTable, create the columns, and iterate through each of the lists...then associate the dataTable to the dataGridView's dataSource. However, I don't want to iterate through the lists since in my real application, these lists are large and the iteration would take too long. I'm just wondering how to assign these lists to a column in a dataTable in bulk.

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VS 2008 : Having The Values For Each City Selected Via Two Drop Down Lists?

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]....

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Forms :: Capturing Values From Two Lists Boxes During Drag And Drop?

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?

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VS 2008 Bound - Source Data Of Drop Down Lists Be Separate Queries / Datatables?

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]...

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Asp.net - Finding A .net Code To Add Existing Buttons/text Boxes/drop Down Lists, Etc To A Container Or Holder?

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?

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Populate Program Multidimensional Drop Down List?

Aug 15, 2011

I am trying to initialize a dropdownlist in VB.NET but my dropdownlist is not populating any values. I want the DataTextField to be different from DataValues in the dropdownlist. Dropdownlist should display series of strings; DataValues should only be numbers.[code]...

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Asp.net - Creating Multiple Querystrings From Drop Down Lists - Could Be 1, 2 Or 3 Querystrings?

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?

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VS 2008 4 Drop Down Lists, Select A Choice In One, All Get Same Choice?

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.

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Populate A Drop Down List With State Information From A Database?

Jun 7, 2011

Background - I'm trying to populate a drop down list with state information from a database. I'd like the full state name to be the option and the state abbreviation to be the value. Example:

<option value="AL">ALABAMA</option>

Current Progress - The full state names and abbreviations already exist in the DB. I've successfully populated the DDL with full state names from the DB. Here's the code I've used to do this (minus stuff I've deemed irrelevant).Model Context (generated from template):

Partial Public Class BrokerCRMEntities
Public Property States() As DbSet(Of State)
End Class
State Model (generated from template):
Partial Public Class State

[Code]...

Question - In addition to populating full state names like I've done above, I'd also like to populate the value of the select options in the same DDL with the state abbreviations in my DB/model. How is this done?

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Sorting 2 Lists Based On Only One Of The Lists?

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

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Know If An Array Of Lists Contains Similar Items (similar Lists)?

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]...

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Drag/Drop In A Drop Down List?

Apr 5, 2011

Is it possible to reorder the elements of a drop down list (combobox) via drag and drop?For example, when the list is dropped down, I want the user to be able to drag the items up or down to reorder them. I tried this (and some google searching) but I'm wondering if its just not possible:

Private Sub cmbClassLists_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles cmbClassLists.MouseDown
If cmbClassLists.DroppedDown And Not cmbClassLists.SelectedIndex = -1 Then

[code].....

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VS 2005 ComboBox Drop Up Instead Of Drop Down

May 9, 2011

ComboBox drop up instead of drop down..i want to defualt for a particular drop down box to work this way how can i do it.

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For Each Loop - Two Lists?

Jul 24, 2010

I would like to loop through two lists using a For each loop.
dim data as list(of pointpairlist)
For each recLine in records
For Each chan In recLine.channels and d in data
d.add( func(chan) )
Next
next

Note: each record line has one sample from each channel recorded. i.e. each record line is a slice of a 32 sensor recordings. I want to build up a x,y list of data points for each channel (the x axis is common to all channels). Is there some way to do it similar to what I have above (avoiding indexing variables).

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Passing Lists From WCF To WCF In VB?

May 13, 2011

I'm trying to populate one list from another. I would think this code should work, but at the end of the day I get a list of identical items.

Public Sub WriteDatFile(ByRef lstReasons As System.Collections.Generic.List(Of LetterReason))
Dim tmplstReason As New TCPService.LetterReason

[Code]....

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VB Lists And Calculations?

Jun 6, 2011

I'm very new to programing and am having problems trying to perform some calculations with a list. I have read in an array into a list with a count attached to each item example: "xxxxxx(intcount)". What I'm trying to do it use two xxxxxx(intcount)'s at xxxxxx(intcount+5) and xxxxxx(intcount+25) and use these two variables to calculate yyyyyy(intcount) but it isn't working. I understand this may be a stupid question but could someone please point me in the right direction.

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Display The Lists Of Costs ?

Mar 20, 2011

Ok this is a hw assignment like always....just not sure on how to do the math on this form...the constants are declared for the registration fees and i did the same for the required days at each work shop i just need to find a way to multiply the days required at each workshop by the lodging fees. but i also need to display the lists of costs so its pretty complicated.

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.net - Compare Different Generic Lists?

Mar 2, 2011

I have a method where I'm taking a generic object and using TypeOf to check what has been passed through. Now I would like to pass it a List(Of T) (T being anything) and no matter what T is I'd like to do the same thing to this list. I tried the following:

public sub foo(ByVal obj As Object)
if TypeOf obj Is List(Of Object) Then
'do stuff
end if
end sub

but this doesn't seem to work if I pass it List(Of String), say. I suppose that List(Of Object) and List(Of String) are being treated as different objects, but I thought that since String is an object, the comparision might work.

Now I realise that this is as ugly as sin and I'm better off overloading the method to take List(Of T) as its parameter, but I'm mostly asking out of curiosity: is there a way of comparing the types List(Of Object1) and List(Of Object2) and getting a positive result, since they are both just List(Of T)?

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Compare Differences Between Lists?

Feb 17, 2011

Compare differences between lists?I have two sets of lists below[code]...

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Comparing 2 Lists Name And Price?

Dec 17, 2009

I'm creating <!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;} @font-face {font-

[code].....

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FluentValidation With Lists Of Objects?

May 31, 2012

Right now I have a viewmodel that contains three lists of inputs; textboxinput, dropdownlistinput, and checkboxinput. Each of these lists is a list of input objects, which contain four values; paramenums, paramname, paramtype, and value. I am using these input lists to generate a variable number of fields on a form dependent on how many objects each list contains.

My current problem is that I'm not sure how to validate the variables in the list objects with fluent validation. I know how the behavior of each list should behave with regards to returning Nothing, but I don't know how to code that behavior with FluentValidation.

[Code]...

The thing I want to currently do is confirm that in every object in each of my lists, they all have a value attribute that isn't nothing. Can I do this by validating the input model? Right now, the code works at confirming that the list itself isn't null, but the objects in the list can still contain all null values. Is there a trivial way to do this? Alternatively, should I have set my code up differently?

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Grab, And Lists All Into A Listbox?

Aug 27, 2011

<a href="http://www.websitename.com/Name" data-hovercard="/ajax/hovercard/user.php?id=100054545">Name</a>

how to grab, and lists all into a listbox?

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