Forms Data Controls :: Adding Value To Dropdowns
Jun 8, 2010
I got a web app linked to a SQL Server 2005. The registration page for learners on this page require a lot of information and many of them are on dropdown controls linked each to their own table adapter. The table adapters are linked to tables within the Database. The dropdowns consist of info like designations, grades, categories, race, etc. The tables like designations changes from day to day as new types of designations are added and the other removed. What will the best way be to add data to the dropdowns? Another way I considered are to have one table and add a field like a type field that distinguish between the dropdown so that I only use one table adapter, or are there a better way. Some Code:
[Code]....
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Dec 6, 2010
I am using panel to hide and display certain controls on a page, On one of my panel i have three drop down, all i want is to make sure that user has selected something from the dropdowns otherwise they cant proceed, i am using the requiredfield validator but its just not working
[Code]....
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Nov 22, 2010
I've been trying to figure out the issue and knowone seemd to know. I put a dropdown on my page and when I view it from my server, it works fine. When I tell it to go and get it's values from a DB I can no longer see it on the page when I view it from the server. Here's the code I have for it:
<td
class="style28">
<asp:DropDownList
ID="DropDownList2"
runat="server"
DataSourceID="AccessDataSource1"
DataTextField="Team"
DataValueField="ID">
</asp:DropDownList>
<asp:GridView
ID="GridView1"
runat="server"
AutoGenerateColumns="False"
DataKeyNames="ID"
DataSourceID="AccessDataSource1"
EmptyDataText="There are no data records to display."
Visible="False">
<Columns>
<asp:BoundField
DataField="ID"
HeaderText="ID"
ReadOnly="True"
SortExpression="ID"
/>
<asp:BoundField
DataField="Team"
HeaderText="Team"
SortExpression="Team"
/>
</Columns>
</asp:GridView>
<asp:AccessDataSource
ID="AccessDataSource1"
runat="server"
DataFile="App_DataIRISBS.mdb"
SelectCommand="SELECT [ID], [Team] FROM [tblTeam]"></asp:AccessDataSource>
</td>
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Nov 26, 2010
I have two dropdowns menu in detailsview (Both one table) . I want to change items in the second dropdown when the user selects an item in the first dropdown.
What I did as following but it does not work :
Add an empty SelectedIndexChanged event on the first dropdown and then, bind the second to the first under Selectedvalue. Also, sat AutoPostBack="True" on first dropdown.
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Feb 24, 2010
I have three parameters to search and the record is being populated on the gridview.
Paremeters are dropdown lists:
lstDepartment, lstSection, lstLocation
I used AutoPostBack to true for above dropdowns but the problem I am facing is when I select value in lstDepartment to show values in lstSection then gridview data refreshes and after that when I select lstSection to show values in lstLocation then again gridview refreshes.
What I want to do is to when I'll select dropdown one by one then gridivew display data when a Search button pressed.
I don't want to refresh gridview everytime on the basis of dropdown selection.
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Aug 5, 2010
Using ASP.NET 2.0
I have a gridview populated by a SQLDataSource that is fairly complicated on a dataset changing constantly. It takes a second or so to fetch the data.
I want to have external dropdownlists for filtering the data that appears in the gridview, either with a FilterExpression or with parameters.
The problem is that querying the database to populate the dropdownlists takes a long time, because of the complexity of the query. The values in the dropdowns can vary based on other filters.
Is there some simple way of querying the database only once, for the main gridview, and then somehow querying the local (to ASP.NET) copy of the data to extract distinct values for populating the filtering dropdowns? I am thinking this might speed things up a bit.
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Mar 11, 2011
I have 45 dropdown lists in my asp page. There are some methods that I can apply to all of these dropdowns. Is it possible to convert them into an array of dropdowns for ease of use?
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Jan 5, 2010
So I am using a formview that gets in Update mode with a bunch of values from a sqldatasource --- but I want to fill a couple dropdowns with data from the database --- but I cannot figure out how to bind the data to the dropdown box FIRST and then select the value in that dropdown box... but I keep getting an error that the Selected value is not a part of the dropdown (I assume because the sqldatasource is trying to bind BEFORE I can get the dropdown box bound).
IE -- when I load my values, lets say a 'Crop' comes back as 'Corn' ... I want to download the available crops from the database (ie. corn, beans, wheat, okra, etc.) and then set the selected value as CORN.... SO HOW do I get the dropdown filled BEFORE I try and bind the selected value?
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Nov 11, 2010
i've 4 similar dropdowns in my form in four different categories, is there any way to bind one of them so that the remaining dropdowns can be automatically filled or binded with the same content as first dropdown
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Aug 26, 2010
I am working with a formview edititemtemplate. Currently in my page load, i have some stuff that would show or hide certain panels based on dropdownlist values. These dropdown values get binded during page load. I need to be able to change the values/dropdowns, without rebinding the old data, and updating the visibility of the panels based on predefined rules.
I have experimented with putting my formview.databind() in page load if isnotpostback, in prerender, in prerender if isnotpostback. I have tried my rules (ex if ddlState.selectedvalue = "DE" then pnlDelaware.visible = "true") in the page load, and the page render. I'm just not sure how to get the stars aligned here. The closest i have come is having the databind in the pageload if notispostback, and the rules in the prerender. However I get an error "dropdownlist has a SelectedValue which is invalid because it does not exist in the list of items.
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Mar 8, 2011
I have a page with a data repeater. Each row has a dropdownlist for the user to select a value and the values in every dropdown are the same. I also have an SqlDataSource which each dropdownlist gets its values from as its created. Everything is working as it should but for each dropdown that is rendered a seperate call is made to the database.
suggest a better way for me to do this that means only one call to the database for all dropdowns rendered?
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Jul 28, 2010
I'm a complete novice in .NET. I am trying to implement a multi textbox / dropdowns / checkboxes search for a website using vb.net. How do I pass the values of my form fields to my griedview and display the search result on the same page?
I've written a stored procedure and specified it as data source for my gridview and defined parameter source as my CONTROLS (textboxes, checkboxes n dropdowns) on the form. What I want is when a user fills out one or multiple fields on the form, how do I display data in the gridview on the click of SEARCH button? Also is it necessary to write a codebehind for my search button or we can achieve the desired result in some other way?
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Mar 4, 2011
I have figured out how to programmically hide a dropdown on same page and on a different page using a Session when the Dropdownbox im using has a static drop down list. I am, however, having issues with a dropdown that is data bound to a DB for the dropdown list.I have gone over the code many times and that seems to be where my issue lies.
Here is where i set the selected item to a session on one .CS page:
[code]...
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Dec 23, 2010
I've been working on my first version of an ASP.NET app, using cascading dropdowns. I've got 2 dropdowns on a page.
However, the third major control on the page is a details view. It works fantastic, with the cascading dropdowns, to display information from the second dropdown, and allow the user to edit that data. All well and good. But now, in testing, I suddenly realized that I've got no way of displaying the details view if I want to let the user enter new data, which would show some information in the second drop down.
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Mar 5, 2011
I have a small problem with a querystring that populates 4 dropdowns.
On page A I have a hyperlink that adds 4 values to my url and on page B I have 4 dropdowns. I am able to click the link and the dropdowns are populated with the correct data! My problem is I do not know how to fire the postback event from DDL4 that shows my data!
[Code]....
My Sql statement:
[Code]....
As you can see from my code there are 2 control parameters. When DDLPrice is selected my page shows all the data. But when I use the querystring method it does not.
I load the querystring from my page load event
[Code]....
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Dec 3, 2010
Add rows dynamically to a table and poulate data in cascading dropdowns,I am using ASP.NET3.5,
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Mar 22, 2010
I have a web page devoloped in visual studio 2008.I have 4 dropdowns and a repeater in the page.based on the selection(search criteria) from the dropdowns the repeater value will change and one dropdown selection will bind values to the other dropdown also.Since the page is causing a lot of postback we decided to implement ajax here.I am yet to learn ajax.which ajax control replace dropdowns?
i have already server side code written on all dropdowns.Please give me a good solution which i can implement in less time and reuse my code.One more update: i have a master page used in the project.I am using update panel of ajax which does not work if i use master page.(That means all the dropdown controls and repeater i put it in update panel.But still page postback occurs.)In a normal page(without master page) it works?
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Feb 10, 2011
i'm currently learning .Net and i can get data out of a database and display in a listview. But how can i access data items in the code behind and format, change, concatenate...do whatever i want to them then display in the list view? Is it even possible?
[Code]....
Maybe an example of what i'm trying to do would be to concatenate a address from the dataset and in a variable sAddress and then attach sAddress to a label in the list view, or add to colums of the dataset together and then show in a label in the listview.
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May 6, 2010
Scenario : I want to add data from database to checklistbox on page_load and checked data should be stored in other table.I want to bind data to checklistbox like a gridview, i m trying but i m not able to.
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Oct 12, 2010
I'm using a GridView to output some information regarding an account, specifically account balances. Problem is, if there is no balance linked to the account, I need for the grid to simply display 0 for each column. EmptyDataText isn't sufficient as the columns still need to be listed, but just have the value 0.
After researching it seems like I will need to add a dummy row to the gridview if it is empty, but how do I do this using C# and ASP? Quick note as well, not sure if it's relevant but the grid will only ever contain one row.
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Jun 14, 2010
I'm trying to access and display certain data in my database using category ID's. I've added values to the links in a link list and I was to have the selected value as the one that determines the selection in the selection statement. For example, "SELECT [ID_key] AS ID_Key, [Title], [Source], [PublicationDate], [Url], [CatID] FROM [Newsarts] WHERE ([CatID] = Linklist1.SelectedValue)". I know Linklist1.SelectedValue doesn't work or it may work and I don't know how but I want to be able to use the value selected from the previous link. Is there a way?
Also, after all the data is displayed, I would like them to become links themselves. Basically, I want to choose a category, then choose an article in that category, and they hit the link to display the article's content.
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Aug 31, 2010
I am currently adding checkbox functionality to a system. I would like to check a group of users and add them into a db table. I currently have the administrator values flowing into the db table fine but it will not insert the empID into the table from the gridview. Here is my code:[Code]....
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Jan 19, 2010
I have a gridview that contains template fields with textboxes that is used to look up inventory items. The page loads using an arraylist to display a gridview control with a predetermined number of rows. There is also drop down control that allows the user to add additional rows to the gridview if needed.
Currently when a user has already entered some data if you use the drop down to add more empty rows all the original entrys are removed. I want to save the original data and then add empty rows at the end.
>>
Private Sub LoadDataGrid(ByVal numberOfRows As Integer)
Dim Counter As Integer
Dim GridList As New ArrayList
For Counter = 0 To numberOfRows
GridList.Add(New LibVB.Form2VB(Counter))
Next
gvEnterParts.DataSource = GridList
gvEnterParts.DataBind()
End Sub
<<
I'm lost, kind of a newbie to .net, have been working on this for 2 days! d.
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Dec 20, 2010
I have a piece of data that has a refererence number and then account name that looks like this in the database:
111111,Member Account~222222,Trial Account
I have the data spitting out just like that in a grid view, but I am wondering if there is some C# I can put in to where it adds a column when there is a comma and another column when there is a ~ in the data?
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Mar 9, 2011
provide me the cascading dropdown code upto 3 levels without using the WebService .
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