C# - Populating An Asp:dropdownlist From Multiple Tables In A SQL Database?

Dec 22, 2009

I have 4 tables: CustomerDocument, CustomerLink, CustomerAdditionalInfo, and CustomerImage. They each have a value of CustomerNumber, and I need to way to pull the customer numbers from each table and put in a drop down list. I know how to do it with one table, but not multiple. Also, there is a restriction that the CustomerNumber needs to be not null, so do I need to include this with each join? Here is a bit of code I have now. oDb is the DataContext

var oData = from c in oDb.CustomerAdditionalInfos
where ( c.CustomerID == CustomerID &&
c.CustomerNumber != null &&
c.CategoryID == CategoryID )
orderby c.CustomerNumber
select new { c.CustomerNumber };
return oData;


Web Forms :: Populating Multiple Dropdownlist Controls Using 1 XML File?

May 26, 2010

I have 3 dropdownlist controls for use with capturing birth dates. One captures the month, the next the day and the next the year. Rather than having to use 3 different xml files to populate the controls I want to be able to use just 1 xml file, but I haven't been able to work things out. I thought this would work:

<date month="1"/>
<date month="2"/>[code]....

I thought I'd be able to assign the datatextfield of month, day or year to a given control, but this isn't working. They show up in the datatextfield dropdown in properties, but when I try to view the page in a browser I get an error that tells me the field (i.e., day) does not exist. Is there a way I can accomplish this? I am developing an ASP.NET 2.0 site in VS 2005.

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Populating DropDownList From Database?

Nov 21, 2008

I have managed to populate my dropdownlist from my database but have a few questions. The dropdownlist is displaying a list of student names. however i was wondering whether you can populate the dropdownlist with more than one field?

What i need is when the form is submitted for the student name from the dropdownlist to be written to the database but for the ID of the selected student to be passed on to the confirmation page through the URL.

I know the code to retrieve the parameter on the confirmation page and how to add the paramter into the URL on the redirect line of code. just not quite sure how to use the names to write to the database but for the ID to be passed.

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MVC :: Populating DropDownList, Other Then From A Database?

Jul 18, 2009

I've read lots of different articles on DropDownList, but mostly all focus on populating it from a Database via a foreign key. This has been great so far, but my current website needs lots of drop downs that are not stored in the database. E.g.

Next to the Rent attribute there needs to be a Rent Type drop down with two values: 'per Week' or 'per Month'. This Rent type is not stored in the database, its simply used to convert weekly rents into monthly rents, and leaves monthly rents as they are (as Rent is stored as a monthly value). What is the best way to populate the drop down this drop down? To create a SelectList in the controller action each time? Or to create a custom html helper drop down (as its likely to be used elsewhere)? E.g.

There are a few other instances like this, for example, options on how the results are displayed: Order By (list of certain attributes), Results per Page (5,10,15) and Display Type (list of display types). None of these are stored in the database, and just effect how the results are processed.

Where is the best place to store all these select lists (as again, they are used across multiple pages)? Should I store them in the Business layer and then retrieve them in the controller and populate each list?

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Web Forms :: Populating DropDownList From Database?

Sep 18, 2010

I'm really struggling with this tonight (this being exactly what it says on the tin, (or the subject!)).

Code I'm working with right now is:


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Access :: Populating Database With DropDownList Data (vb)

Apr 30, 2010

I am trying to populate (store) an access database with the information from a DropDownList.

At the moment i have a form where the user inputs data into a textbox and on sumbission it adds to the access database. I am unsure how to add data to the database from the selections choosen in the DropDownList. I have a DropDownList for Title e.g. Mr,Mrs,Ms,Miss.

I have provided the code that populates the database from the TextBox's


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Web Forms :: Dynamically Populating The Database In The DropDownlist Using C#?

Sep 24, 2010

i have 2 tables Desgn & EmpForm

Desgn table is lik this

CREATE TABLE [dbo].[Desgn](
[DesignationCode] [int] IDENTITY(1,1) NOT NULL,
[DesignationName] [varchar](50) NOT NULL,


and i have called the Populate1() method in the page load event., but i m not getting the dropDown populated why ?

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MVC :: Multiple Database Tables For A Single View

Apr 16, 2009

I'm not able to find an answer for this problem, all tutorials I have read talk about a single 1-to-1 relationship (1 table for 1 view). But what I can do if in a single view i need to retrieve data for different datatables?

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Search Multiple Tables In Database Via Textbox?

Mar 31, 2010

I have created a search page which outputs results in a repeater. It uses a stored procedure to search a table %like a textbox value, what's the best way to make it search multiple tables and output the results on one button click?

As i could just use seperate stored procedures and repeaters for each table i want to search, which is only 2, but this seems inefficient.

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Can Use Multiple DataBase Tables In One DBML File - LINQ To SQL Classes

Jan 2, 2009

We have two different Data base tables, we would like to relate both tables in one DBML file.

Is it possible?

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SQL Server :: Query To Select Data From Multiple Tables And A Different Database?

Dec 1, 2010

Is there a way to select data from multiple tables other than the UNION ALL statement. Addtionally I need to select data from a different database.

My current statement is as follows (there are alot more fields but I have shortened it ):

WHERE (BSFLBWF_1.Closex IS NULL).........

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To Read Multiple Excel Files And Upload Into Respective Database Tables

Dec 14, 2008

I have a situation wherein I need to read multiple excel files and upload into respective database tables. This takes a long time as I go through files one by one.

I'm wondering if there is a way I could read all the files at the same time and upload asynchronously??? Using threadpool/Manual threading??

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C# - Populating Dropdownlist Using MVC2 Based On Another Dropdownlist (Cascading)

Sep 18, 2010

I am making an application that deals with vehicles. I need two DropDownLists:

Makes: All Vehicle Makes
Models: Models that belong to the selected value of the Make DropDownList

How is this done in MVC2? My Idea: Do I use an ajax call when my first list is selected and then pull back the Models to bind to the Model DDL? How would model binding come into play that way? UPDATE I posted what I ended up doing as an answer. It is super simple and works great. You can use a get too if you feel so inclined, but you have to specify that you want to like so... return Json(citiesList, JsonRequestBehavior.AllowGet);

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Web Forms :: Populating Dropdownlist Upon Selection Of Another Dropdownlist?

Jan 19, 2010

I have one table which contains branch codes(primary key), Branch name and bank name columns. I have 3 dropdownlist boxes. the first dropdownlist is for the branch codes. When i select the a branch code i need the second dropdownlist box to populate with the appropriate branch name and the third dropdownlist box to populate the bank name at the same time.

Is it possible to have one table like mine and acheive this, if so how do i go about doing this?

I did read up on this but only came across ones with 3 tables.

I am using Visual Basic to do this.

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Databases :: Importing - Updating Sql Tables From Excel Sheet Into Multiple Tables Daily

Jan 4, 2011

I have an C# ASP application I am writing that needs to have the capability to import a generated excel or a comma delineated sheet each day. A clerk will have this job each morning so it doesn't need to be automated. My problem in trying to understand the solution to this is that the 1 sheet contains loan information, including customer information all in the same sheet. I would like to send certain columns to update information in the loan table and send other information to update the customer table. I need it to create relationships when new loans appear in the spreadsheet.

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Crystal Reports :: From Multiple Tables / Gave Link To Two Tables, But Its Not Working Fine?

Jul 2, 2009

I tried to view more than one table fields in crystal report. But one table data ll be visible other one table data and that table header also not visible. I gave link to the two tables, but its not working fine.

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Linq Mapping To Multiple Tables / How To Create The ORM Links Between The Objects And Tables

Aug 19, 2009

I working my way through the Apress "Pro ASP.NET MVC Framework" [URL] book, and in an example the author creates a link to a db table (as well as a fake repository) using linq like this:-



off to a DB table "Products" with the column name specified and it works nicely. I am using this technique in a real-world app, as it handles the DB access layer nicely, but I need to be able to access several tables from my object. How can I do this - do I need to split my object up into a hierarchy that reflects its tables or can I access more than 1 table from the main object, with other additional objects hanging off it that have their own tables? If so then how do I create the ORM links between the objects and tables?

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Validation On CSV File And Insert Rows Of CSV File Into Multiple Tables Of SQLServer Database?

Aug 12, 2009

I have to upload a csv file, perform some validations (No of coloumn must be 8, if any cell in Coloumn 2 contains a text "Answer" it must be followed by a "Question" above in same coloum) and then insert the values into database as following

1. worksheet name should be inserted into "tblSection" table database.

2. The rows those contain text "Question" in 2nd coloumn of CSV file will goes into "tblQuestion" table.

3. The rows those contains text "Answer" in 2nd Coloumn should be inserted into "tblAnswer" table of db.

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Forms Data Controls :: Data From Multiple Database Tables Displayed On The Same Page?

Aug 20, 2010

i would like to find out how to go about displaying data from multiple database tables on the same page. What i mean is it would look like the feeds on the facebook home page where you can see the information like newply uploaded photo or a new post.

I have two tables, and i want to display any newly created row on my home page from either table in the same control. Currently, i have two gridviews, but i want the data from both tables be displayed together.

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DataSource Controls :: How To Show Multiple Column Data In Dropdownlist From Database

Jun 3, 2010

I want to retrieve data from various column,which may some have blank value, so my problem is i want to retrieve only filled column(not any blank column) from multiple column.. I am doing this (given below) but it didn't return anything...

Column Name Value

Restaurant Restaurant

Spa Spa



Fitness_Center_Gym Fitness_Center_Gym

OleDbCommand cmd1 = new OleDbCommand("select nID Restaurant+''+Spa+''+Parking+''+Bar_Pub+''+Fitness_Center_Gym AS Facility from add_property where ncity='" + DropDownList1.SelectedItem.Text + "'", con);
DropDownList2.DataValueField = "nID";
DropDownList2.DataTextField = "Facility";

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Forms Data Controls :: Update Multiple Database Fields From A DropDownList In A GridView?

Oct 20, 2010

I have a GridView with a DropDownList in it bound to the [Applicants] table in SQL Server 2005.

The DropDownList Items Text and Value come from SqlDataSource3, "SELECT VoucherType, VoucherNumber FROM [Vouchers]"

I need to send the DDLs selected Text to [Applicants].[VoucherTypeIssued] and the Value to [Applicants]. VoucherNumber]

I already have a "dlVoucherTypeIssued_SelectedIndexChanged" event in the code behind to put "Voucher Issued" into [dbo].[Vouchers].[VoucherStatus]. I'm having trouble getting all three values written to the database at the same time.

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Web Forms :: Populating Dropdownlist Using C#?

Jan 19, 2010

I am getting a problem while working with the Dropdownlist in VS2008. I am trying to populate the DDL using c# codding instead of creating DataSource in GUI. The DDL is getting populated as expected, but then I've added a label that will show the current selected item; for this I've written a code in DropDownList1_SelectedIndexChanged() :

Label1.Text = DropDownList1.SelectedValue.ToString();

I hae also enable AutoPostback for the DDL.
I have placed the PopulateDDL() method inside of the Page_Load();
But whenever I select a item, it's always giving only the first item's name as the Lebel.Text.
But when I use GUI and ceate a SqlDataSource and attach that to the DDL all works fine.
What to do??

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MVC :: Populating Dropdownlist From Different Collection?

Mar 23, 2011

I'm new to MVC pattern and I have a question regarding to a dropdownlist. Actually My Data came from a collection (random string) then it displays it in a list. And yes it display, so I add a dropdownlist. And I can populate it using the same collection. My question is how can I populate the dropdownlist from different collection?

Here's my View


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Populating DropDownList From DataReader?

Apr 9, 2009

been trying all night to populate and asp dropdownlist from a datareader reading a mysql database, the data reader itself work fine but I can't get it to poulate the DropDownList, here's my code:Code:

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C# - DropDownList Not Populating With Correct Value In MVC?

Feb 22, 2011

so I am having an issue getting a drop down list to choose the right value when it renders. It always defaults to index zero. However, I do have a view in another place where it renders just fine and selects the right value. I don't understand the difference.

Here is a trimmed down version of the view that works correctly:

@model AppName.Models.Guest
@using (Html.BeginForm())
Attending Ceremony?<br />
@Html.DropDownListFor(x => x.ConfirmCeremony, new SelectList(new Dictionary<string, string>
{"No Answer", "No Answer"},


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Exporting Multiple Tables In A DataSet To An Excel File With Multiple Sheets?

Jul 8, 2010

I was in need of exporting multiple tables in a DataSet to an Excel file with multiple sheets. I found a very good article in [URL].[URL] was able to successfully export each of my datatables in the dataset to excel worksheets. This solution worked for small number of rows. But when the data got larger I am consistently getting the system.outofmemoryexception. THis is because the code is using up the memory when creating excel.

Does anyone have another option to do the above?

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DataSource Controls :: Multiple Insert Into Multiple Tables With A Stored Procedure

Mar 1, 2007

I have 8 questions.

Textbox - Call reference
Dropdownmenu - choose Support method
Radio button lists - Customer satisfaction questions 1-5
Multiline textbox - other comments.

I want to insert textbox, dropdown menu into a db table, then insert each question score into a score column with each question having an ID. I envisage to do this I will need an insert query for the textbox and dropdownlist and then an insert for each question based on ID and score.

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MVC :: Populating Items In A DropDownList From The Model

Mar 23, 2011

Using MVC2, I want to know how you add the options of a dropdownlist from a database. I have several lookup lists so I will need to do this many times. I'm stuck on part 5 of the MusicStore (which is using MVC3) at this part


Alternatively if someone could recommend an MVC2 tutorial which covers drop lists.

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Dropdownlist In Gridview's EmptyDataTemplate Is Not Populating?

Feb 1, 2010

<asp:DropDownList ID="ddlRateCode" runat="server" DataSourceID="odsRateCode" DataTextField="RateCode"
DataValueField="RateCodeID" SelectedValue='<%# Bind("RateCodeID") %>'>

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Web Forms :: Populating Dropdownlist In LoginView From MySql DB?

Jun 13, 2010

Trying to populating dropdownlist in LoginView from mysql db but am getting Object reference not set to an instance of an object error.

Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender

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Access :: Populating An EditTemplate DropDownList In A DataGrid

Apr 7, 2010

Here is the code from a datagrid edit command in which I am attempting to populate a DropDownList in the EditTemplate from the database. The result is only one item (the first) from the database, instead of all items.


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Web Forms :: Populating Dropdownlist From Session Variable?

Nov 3, 2010

To speed things up for the visitor of my web page, I put a personalised dropdownlist in a session variable (as below).

The idea is that if the user is logged in and the ddl session variable is Nothing then it should be set here, and the next times the dropdownlist should be set from this session variable.

The session seems to be populated ok, but the resulting dropdownlist (ddlMenu) doesn't (it just becomes blank). I suspect that it has soemething to do with the way I try to assign it. No matter what I try I run into problems, saying that one thing is a one-dimensional array and the other thing a listitemcollection, or the like. What should I write in the last line?

If Session("aid") IsNot Nothing And Session("ddl") Is Nothing Then
Dim ddlny As New DropDownList
ddlny.Items.Add(New ListItem(vstr, ""))
ddlny.Items.Add(New ListItem(kontrstr, "PageA.aspx"))
ddlny.Items.Add(New ListItem(bstr, "PageB.aspx"))
If dt IsNot Nothing Then 'dt is a datatable, populated elsewhere
For i As Integer = 0 To dt.Rows.Count - 1
ddlny.Items.Add(New ListItem(dt.Rows(i).Item("name"), dt.Rows(i).Item("did")))
End If
Session("ddl") = ddlny
End If

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Web Forms :: Populating Textbox With Dropdownlist Value - Javascript?

Sep 24, 2009

I'm having an issue where when I make a selection from my dropdownlist that when the page is posting back the selection is defaulting back to the first selection, which is "Please Select" by default. Auto Postback is true. I think this is because the values of the selections are the same, and they have to be. I have the value being populated via a SelectedIndexChanged event and it works however as I mentioned the dropdownlist selection is not retaining what the user selected. I have another dropdownlist this works fine and that is because the values in the dropdownlist are different.Does anyone have a good way to populate a textbox with a dropdownlist value via javascript?

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Web Forms :: Populating Dropdownlist With Weekly Date Ranges?

Oct 13, 2010

i am working on an availability / booking system, one element in the form will be a dropdownlist control with a selection of date ranges for a customer to select the period they want to book.these will be a list of ranges for each week (monday - sunday)eg

27th Sep - 3rd Oct 2010
4th Oct - 10th Oct 2010
11th Oct - 17th Oct 2010


is there an way to populate this dropdownlist dynamically from a calendar or date function so it can cater for dates up to 18 months ahead?i dont really want to populate it from database entries or hard coded list items if there is a less laborious way.

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Forms Data Controls :: Populating A Dropdownlist In A Gridview?

Dec 3, 2010

Here is a snippet of my code...


Code behind...

Protected Sub gvPunches_RowEditing(ByVal sender
ByVal e
As System.Web.UI.WebControls.GridViewEditEventArgs)
Handles gvPunches.RowEditing
Dim i
Integer = e.NewEditIndex()
Dim ddl
As DropDownList =
CType(gvPunches.Rows(i).FindControl("ddlDiv"), DropDownList)

the question I have is when i enter this procedure in the code behind, ddl is nothing. what am I doing wrong in populating the dropdown for the row I am editing?

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Populating A DropDown List With Multiple Items?

Apr 30, 2010

I am running into some additional difficulties with dropdown lists, and I'm hoping you can correct my thinking.

I have a table populated with items; ITEM_ID, ITEM_NAME, ITEM_COST.

Here is my code:


With this code I get this error: DataBinding: 'ITEM' does not contain a property with the name '2'.

If I remove the assignment of DataSource to c1, the dropdown generates this error: 'DropDownList3' has a SelectedValue which is invalid because it does not exist in the list of items.

Parameter name: value

How should I code this so that the user is presented with a list of ITEM_NAMES, and that the ITEM_ID is stored in the value field so I can use it when the selection event is fired? I know I could databind the source directly to the dropdown list, but I am trying to understand the behind the scenes working of a dropdown list object.

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Web Forms :: Populating Form2 Txtbox With Selection From Form1 Dropdownlist

Mar 18, 2011

z'm trying to create a webpage for ticket purchases. When selects an option from a dropdown list and clicks a button, I want them to be taken to the next page where a textbox will be auto-populated with their choice from the dropdown list. For some reason, I can't figure out how to get them to communicate. On Form1 I can get Form2 to open onclick but for some reason, when I put code into pageload for Form2 to pull data from Form1, it won't work. For example, on Form2 I would put the following code under pageload: textbox1.text = Form1.textbox2.text

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Forms Data Controls :: Populating A DropDownList In A ListView InsertItemTemplate

Jan 19, 2010

I have the following ListView (extra code removed for clarity) :

<asp:ListView ID="lvParticipants" runat="server" DataSource='<%# Eval("Participants") %>' >
<asp:DropDownList ID="ddlCountry" runat="server" SelectedValue='<%# Eval("Country") %>'
DataSource="<%# GetCountries() %>" DataTextField="Text" DataValueField="Value" />
<asp:DropDownList ID="ddlCountry" runat="server" SelectedValue='<%# Eval("Country") %>'
DataSource="<%# GetCountries() %>" DataTextField="Text" DataValueField="Value" />

The Insert row in the ListView has an empty DropDownList and GetCountries() is not called. However, if I click the Edit button on an existing row, GetCountries() is called twice (not sure why) and the DropDownList is properly populated. Why isn't the InsertItemTemplate DropDownList getting populated?

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Forms Data Controls :: DataList - Populating A Second Dropdownlist On Selectedindexchanged?

Dec 4, 2009

I'm having a bit of trouble having a dropdownlist populate a second dropdownlist nested within a DatList. How should this be done?

Here's my datalist and dropdownlist control:[Code]....

Here's the codebehind for the OnSelectedIndexChanged


Where did I go wrong? Do i need to include another command function like OnItemDataBound or something?

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Forms Data Controls :: Populating DropDownList In FormView From Code Behind?

Oct 25, 2010

On my formview I have a drop down list that is populated with the names of the files in a certain directory. This works fine, but when the drop down list selected value is bound to the database field I get the following error :

'ImageFileDropDownList' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value

I have setup other drop down lists in the same formview populated from SqlDataSources and these all work fine. I can see perhaps why this is an issue because I have not specified a DataValueField or a DataTextField for this drop down that is populated in code (whereas I can for the SQL bound ones) because I'm not sure what these settings would be.

I need to have a "blank" option as well so that the field does not default to the first value in the list.

My code (I have stripped out some meaningless controls) :


My code behind populating the ddl :


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