Asp.net - Populate DropdownList Based Upon Other DropDownList VB?
Jun 1, 2009
I have found a couple of examples on the internet to do this but really struggling to get it working in VB. (Tried a converter but had mixed results) I need the selection options of a Dropdownlist to be populated based upon the differing values in the first dropdown list.
Can anyone help with a releativley simple example in VB? Not fussed if the values are "hard coded" in the script. Or a SQL bit that pulls the data from a table
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Aug 28, 2009
I want to populate the dropdownlist ddVerantwortlich1 with the people with the proper credentials based on the selected process step ddProzesss chritt1.It doesn't work if I want to change it using datasource and databindi have to manually loop through the table in the dataset returned from the query. then it works. but not otherwise.[code]
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Jan 15, 2012
I'm trying to write a program that selects an item (Area Code) from a combobox and this list gets the city that was associated with this area code (another comnbobox list)
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May 26, 2011
I have a window having 2 dropdowmlists(schemename-SN and propertyno-PN) , one chkbox ,one "VIEW" button.SN has options "all" with value=0 and many other options with respctive values.Now,i want the code should behaves as follows:
1.0n window onload, SN must b visible bt PN nt.
2.if i select SN other thn All...the PN shud b visible and if i select "All" ,PN hides.
3.when check box is checked- PN hides,and if it is unchecked- PN visible..
Important:-This whole ddl n chk box are in updatable panel,button is nt in that.I want a browser compatible code so javascript can't b used directly(cz they give problem in mozzila and chrome).Right now, i have done this JavaScript and its is working fine.
function window.onload()
{
DisableProperty();
}
[code]....
but this code is not browser compatible.here onload,onkeyup and onclick functions are used , but they dont work in other browsers except internet explorer.
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Mar 5, 2012
I have created a connection string, and i am populating a dropdownlist with an ID from a sql database.I want to be able to click on a ID from the dropdownlist and run a query to populate a gridview with data. I have made the dropdownlist autopostback = Enabled. I am not getting an error.
Here is my code:
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlContracts.SelectedIndexChanged
Dim ds As New DataSet
[code]....
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Jun 1, 2011
Where can I get a list of all countries/cities to populate a listbox?
I'm trying to fill my dropdownlist with all world countries from windows, is there any way to make my dropdownlist get all countries from windows?
Or do anybody have a XML with all the list so I can use it?
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Aug 6, 2009
I am new to Ajax and have a rough idea about Ajax. I am developing a website having a feedback page in which, i want to populate the state/city DropDownList box depending upon the value selected in country DropDownList box.
I have seen some examples downloaded online but they are not working in my application due to many possible reasons, some of them may be the feedback page in my application is a content page, the web application is asp.net 2.0 web application, i don't have any additional ajax tools or scripts installed.give me the solution that should work with asp.net 2.0 web application (in VB.NET) and the feedback page is a content page. I don't want to add custom controls. I want to do it straight away with javascript or vbscript using XMLHTTP object.
After everything is set right with Ajax. What if the browser doesn't support Ajax? What should i do in such case?
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Jun 10, 2011
I'm using VWD 2010 and a SQL Explress 2008 remote database Within the IDE, I can populate a dropdownlist but after I deploy the website, I recieve this error:
System.IndexOutOfRangeException: There is no row at position 0.
Line 52: cmdEmpSched.ExecuteReader()
Line 53:
[code]....
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Feb 10, 2012
Have two dropdownlist inside the edit template of a DataList. The first dropdwon is for state while the second is for town. The state is populated from a table state while the second from a table town when state is selected.
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Dec 31, 2011
May i have a working sample on how to retrieve records from a DB & populate the relevant textboxes after a selection at a dropdownlist. What i have is definitely not working & im working on VS 2008. Can anyone show me the way?
[Code]...
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Nov 23, 2010
I want to be able to change an image depending on what is selected in the drop down box. I have this JS code to change the image. Simplified of course.
<script type="text/javascript">
function changeImage() {
var oDDL = document.all("ddlNAME");
var NAME= oDDL.options[oDDL.selectedIndex].text;
switch(NAME) {
[Code] .....
When I call this function I do it in my DDL implementation.
<asp:DropDownList ID="ddlNAME" runat="server" OnTextChanged="changeImage()" >
But for some reason the changeImage() is not firing. It is giving me an error saying
'changeImage' is not a member of 'ASP.default_aspx'
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Oct 26, 2011
I have a bit of a tricky scenario. It consists of some partial problems for which I have individually found solutions, but I couldn't find anything that makes it all work together smoothly.
-Upon selecting an item in a datagrid, a new page loads with the details regarding that entity.
-The entity represents a product that can have any amount of variants (such as a t-shirt's color or size)
-I dynamically add dropdownlists to this detail-page that represent these variants (there can be any amount of variants, and each variant can have any amount of different values, each value or combination or values from different variants representing a unique product entity)
-Upon selecting a different variant in a dropdown, a delegate is called that will change the session variable to the productId associated with the selected variant and a postback is fired that will reload the page with new data based on this productId
The problem: the postback is fired BEFORE the dropdownlist's (OnSelectedIndexChanged) delegate is called. Since this delegate defines the productId in the session, the new to-be-used productId isn't known at the time of postback.
Result: loading the correct data in the page is always delayed by one postback. Each time I change the selected index of any of the dropdowns, the page is loaded with data based on the session variable that the PREVIOUS OnSelectedIndexChanged delegate of the dropdown set.
I have a LoadData() method that sets the values of all textboxes, fields, labels etc. based on the productId stored in the current session. This method is called on Page_Load.
Private Property CurrentProduct As Product
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
LoadData()
[Code] .....
It seems that I haven't been completely clear on what does and doesn't apply to this scenario regarding Page Lifecycle.
1) My dropdownlists are added dynamically, which works fine on the first page_load.
2) The content of the dropdownlists is defined by what entity's details i'm loading on the page.
3) What entity's details I'm loading on the page is at first(not-postback) defined by the product I selected in a gridview in the previous page.
4) At postback, this entity is based on a sessionvariable containing the id of the entity.
5) This session variable is defined by what item in the dropdownlist I select.
6) This dropdownlist dissapears after postback since it's not defined on the page, but dynamically. So is the event.
So my guess would go towards some clientside script that stored the selected value before postback, but then I would be clueless on how to get that variable to the server since the logic that retrieves the entity is in the business logic layer which is far away from this page..
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Apr 20, 2011
I have a webForm app that registers a user in the database based on the information provided with a web service, auto-generates a random password and username, and e-mails the user a link to take an application based on the marketing company selected. How do I get only the currently logged in user's groups to show up under the MarketingCo_DropDownList. Each user allowed access to the system will have membership in at least one of the marketing groups as defined by the web.config. For example, a user that is currently logged in and belongs to the BIG group under location "algACOMP_user_BIG", will only be able to see BIG in the Marketing Company drop down list. A user that is currently logged in and belongs to the NIS group located under "algACOMP_user_NIS" will only be able to see NIS in the Marketing Company drop down list.
Here's my best guess (located under Private Sub GetMarketingCompanies() method in default.aspx.vb):
If InStr(WindowsIdentity.GetCurrent().Groups = "AMG", item.MarketingCompanyShort = "AMG", CompareMethod.Text) Then
marketingCo.Items.Add(String.Format("{0} | {1}", item.MarketingCompanyShort, item.MarketingCompanyName))
For Each item In ac1
[Code] .....
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Oct 2, 2009
I can't get the selected value of a programmatically generated list of items:
Protected Sub ddlMMMYY2_PreRender(ByVal sender As Object, ByVal e
As System.EventArgs) Handles ddlMMMYY2.PreRender
If Not Page.IsPostBack Then
[Code].....
If I try to get a value from a static DropDownList, <asp:listitem> works.
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May 17, 2011
have 3 dropdown list one has pre set values and my post back works the other 2 has the data from the db when i try using post back on them i don't get anything in my grid view.
<asp:DropDownList ID="ddlname" runat="server" DataSourceID="SqlDataSource1" DataTextField="Venue_Name" DataValueField="Venue_Name" AppendDataBoundItems="True" AutoPostBack="True"> <asp:ListItem Text="All" Value="All" Selected="True"></asp:ListItem> </asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
[Code]...
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Oct 18, 2010
I had posted this question before but didn't get the right answer -here's my code again with the if condition.
Dim provider As CultureInfo = CultureInfo.InvariantCulture
Dim a1 As DateTime = Nothing
If date1.selectedvalue isnot nothing Then
[code]....
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May 10, 2009
Actually I would like to add a default value to my dropdownlist before I bind the data from the SQL statement.Below is my codes,how should I change so that my dropdownlist default value will be "All" then only follow by the data retrieved from SQL? [code]
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May 10, 2009
Actually I would like to add a default value to my dropdownlist before I bind the data from the SQL statement.Below is my codes,how should I change so that my dropdownlist default value will be "All" then only follow by the data retrieved from SQL?
[Code]......
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Jun 2, 2009
I'm building a data entry interface and have successfully bound the columns that have reference tables for their data using DropDownList so the user selects from the pre-configured values.
My problem now is that I don't want the first value to be selected by default, I need to force the user to select a value from the list to avoid errors where they didn't pick that field and by default a value was assigned.
Is there a more elegant way of doing this than to add code to include an empty value at the top of the list after I get it from the database and before i pass it to the SelectList constructor in my controller class?
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Mar 14, 2010
how to add an item to a dropdownlist.i have tried this
DropDownList1.Items.Insert(0,
"Abu Dhabi")
DropDownList1.Items.Add(
"Dubai")
but nothing is showing in the dropdownlist
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Nov 23, 2009
Using VB.NET I want to add a data's in the Datagridviewcombobox column
Code.
cmd = New SqlCommand("SELECT Sched_Name from tb_Sched_Master", con)
ada = New SqlDataAdapter(cmd)
ada.Fill(ds1)
[code]....
But I cannot get the data's, what wrong in my code.
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May 19, 2012
I have a VB.Net Windows app that has a form with a ComboBox. It's dropdown style is set to "DropDownList". When I retrieve a record from the DB, I'm trying to assign a value to the "Text" Property of the ComboBox but it's not taking it. I've tried using the "SelectedText", "SelectedItem" properties and they're not working either.
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May 28, 2010
I am using the following method to set a value to ComboBox1 whose dropdown type is set to dropdownlist:
ComboBox1.Items.Clear()
ComboBox1.Items.Insert(0, "ABC")
ComboBox1.SelectedIndex = 0
Is there any other and better way to do it?
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Jun 2, 2009
I want to databind my catagory table to a dropdown list but thecategories aren't going to be in order like:
categoryID Name---------------------1-----------apple2-----------wiper blades3-----------band aids4-----------pear5-----------raisons6-----------tiresHow would I be able to make the list look like:
[code].....
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Mar 10, 2009
Is the anyway to make a dropdownbox look like this
402-2198 474A 475E 474M402-2602 476T 475B 473Q
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May 28, 2010
I want to get the value of the specifed index in a DropDownList
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Sep 4, 2009
I am using vb.net language I have a dropdownlist, which is filled by below pattern
"Smith,James" so first one is surname and second after "," is firstname
I have two textboxes for surname and firstname. Now I want to fill the textbox when dropdownlist is changed.I mean when user changes the dropdownlist the selected text in dropdown will be filled in related textboxes.so my result will be like this
surname.text = "Smith"
firstname.text = "James"
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May 27, 2010
n't know where to put this question.ge:
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
DataSourceID="AccessDataSource1" DataTextField="maerke"
DataValueField="maidnr" ToolTip="Vælg mærke" style="height: 22px">
[code].....
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Feb 25, 2011
I have 2 drop down lists. When a specific value in the first DropDownList is cicked i want the second one to appear below it. However i'm having some trouble implementing the code. Here it is, does anyone have any idea where im going wrong?
[code]...
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Jan 8, 2010
I'm having the hardest time figuring out something that must be easy. I'm using VB 2005, created a new Web Project and on one of my pages, I have a Dropdownlist Control. Around 10 things or so get put into it at run from a SQL Database. I have that part working just fine. My problem is that once someone makes their choice, how do I assign their choice to some variable. I don't want to update the database, I just want to assign it to a variable to be used somewhere else in the program. I have tried a number of different lines of code that are similiar to
[Code]...
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