I have a Data table object that is populated with a sql call. The table has two columns in int. "CustId" and CustomerName"
using C# in the code behind, how can I populate my drop down list box in C# using the DataTable object?
My code looks something like this, but it does not work.
DataTable MyTable=PopulateTable(); // method call
customerDropDownListBox.DataSource=MyTable;
I'm trying to populate a drop down list from a datatable. Is this correct way of doing it?
public ViewResult Index()
{
ViewData["CampaignList"] = List;
return View();
}
public IEnumerable<SelectListItem> List
{
get
{
DataTable dt = CampaignRow.GetList(DB, 100, true);
List<SelectListItem> list = new List<SelectListItem>();
foreach (DataRow row in dt.Rows)
{
list.Add(new SelectListItem
{
Text = Convert.ToString(row["CampaignName"]),
Value = Convert.ToString(row["CampaignId"]),
});
}
return list;
}
}
how can i stylize drop down list? how can i add an empty first value ie "select campaign"
I am using asp.net 3-tier architecture, language c# for creating a web application. In presentation layer, I want to populate a textbox when I select an option from a drop down list. Under the code sample from .aspx page is given:
<asp:TableRow ID="TableRow4" runat="server">
<asp:TableCell ID="TableCell5" runat="server">
<asp:Label ID="lblCat" runat="server" Text="Product "></asp:Label>
[code]...
I have a DropDownList and I want to populate using a DataTable.
[Code]....
But when appear the DropDownList show System.Data.DataRow why this don't show the real result of the DataTable ?
I am going to add a computed column to a stored procedure that will combine the last and first names of all of the customers in my db. This will be used to populate a drop down list that will allow the user to select a customer so a new record can be entered for that customer.
I was planning on creating this computed column on the procedure that returns all of the customers and all of there information. My db is small so this shouldn't be a big deal, as far as overhead. This doesn't seem like the best approach if the app was using a much larger db. It would unnecessarily return a lot of extra data and make it slower.
I'm curios when a procedure that's dedicated to returning just the customer's first name, last name, and ID should be used, instead of one that returns everything. There are a number of variables that could make this hard to determine, such as number of rows and columns. I wanted to try to get an idea of a cut off point or rule of thumb on this, if possible.
I have created the templatefields in my dynamically created gridview, however, how do i get the values from my dataTable (which populates my gridview) to load into the templatefields I have created?
View 1 RepliesI've got a web application I've built that makes various database calls to render some charts and datagrids for MI reporting purposes. I've got my database calls initiating on Page_Load within the .vb for each page. The site impersonates identity for database access. Page_Load returns a datatable and populates an HTML table inside an ASP:Repeater. Still with me? Well, everything works fine here. My problem is within the Default.aspx.vb Page_Load sub.
The Page_Load sub (in Default.aspx.vb) returns a datatable the same way as the others but instead of rendering the results to a repeater, the datatable is saved as Session("dt"). The saved session "dt" is then used to populate a couple of charts I've got on the home page(default.aspx):
<script
runat="server">
Public
Function buildXML(ByVal Product
As
String,
ByVal reportNameStr
As
String)
As
String
Dim clDB
As
New clDB
Dim clSB...........................
This is my first post as a newbie to asp.net.
I am in the process of creating a "news system", you can add, edit and delete news. The news items can be entered into the SQL database and you select a category where you want the news item to go into.
What I want is when someone comes to the "Edit" screen, they have a drop down list and what that does is allows you to select a category for you to edit news items from, so rather than at present having the "Edit" page display all the news items, I want people to be able to choose a category that they can edit news items in.
So far my edit page has a datagrid with the following code:
[code]....
I am trying to populate a drop down of gender inside gridview but on edit i never update the value any idea wht i am doing wrong?
[Code]....
I tried adding a ddl into my grid header, it was origiinally out side and worked when i put it in the header it no longer worked, i am guesssing i have to do something other than cut past
[Code].....
I've got a drop down list that I want to populate with items from a SQL Server database, which I did successfully, but I can't figure out how to write an if statement that will clear the drop down list based on a selected index and repopulate it with data from another table. The drop down list is inside an update panel that auto posts back.
Basically I want to allow the user to choose an item, but rather than populate another drop down list control, i just want to repopulate the current one with new data.I'm guessing that if I want to get data from more than one table the code below isn't going to work for me. Could I get the data from all the tables at once and store each table data in its own variable until I need to use it? (Each table will have under 10 items, in 5 tables.)
Here is the code to get the data from the database:[Code]....
I have a drop-down list that is wired up to a datasource from one table to retrieve a Vendor ID and Vendor Name. This ddl is outside a FormView that is wired up to a datasource containing Vendor contracts.
When I choose a Vendor from the ddl, I am able to populate a textbox outside of FormView with the Vendor ID from the ddl. However, what I need to do is populate a textbox within FormView with the Vendor ID. FormView is in Insert Mode by default since my page will be used for Adding Contracts only.
I have written a code that populates data from database into the tree using C# and is working perfectly , the thing is how can i populate the tree based on a selection from a drop down menu
the code to populate the tree is below :
[code]....
I have no problem when paging my FormView, the dropdownlist does not read the next record and keep the value of the first loaded record? All other textbox control behave normally and move from record to record excepted the ddl??Here the code.
Public Sub DoData()
Dim myConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("LocalSqlServer").ConnectionString)
Dim myCommand As SqlCommand = New SqlCommand("SelectSupplier", myConn)
myCommand.CommandText = "SelectSupplier"
[Code]....
I am not clear when do I want to use a webservice over a sqlDataAdapter for dataRetrieval. I want to populate a repeater control which I have been doing from a dataTable that I fill from a sqlDataAdapter. Is there criteria when I would want to use a webservice to fill my dataTable?
View 3 Repliesam currently trying to learn about consuming web services within .net and am having trouble with the following example.I have the WSDL file to contact a vehicle look up web service which based on two parameters, pCode which validates me and pID which is the ID of a make of car. The result of the call should bring back an XML response used to populate a drop down list with a list of models available for the specified MAKE.
[Code]....
I've been trying to get this to work for weeks. I am trying to use a cascading drop down to populate drop down lists. The service method is working as i'm able to view the data in the browser but when i run the application the drop down list is empty. see below for the service method.
[Code]....
The code for the drop down list:
Location Name:<asp:DropDownList ID="DropDownList3" runat="server">
</asp:DropDownList>
<asp:CascadingDropDown ID="CascadingDropDown1" runat="server"
Category="Locations"
TargetControlID="Dropdownlist3"
PromptText="[Select Location]"
ServicePath="~/LocationWebService.asmx"
ServiceMethod="GetLocation"
EmptyText="Nothing">
</asp:CascadingDropDown>
I wish to populate a drop down box with each possible SeriesChartType so that my users may choose an appropriate chart type.
How can I iterate through the SeriesChartType collection (it's in the namespace System.Web.Ui.DataVisualization.Charting) and return each possible option so I can add it to the drop down box?
i have a drop down list tied to a database called location.
what i hope to achieve is once a location is selected, my other drop down list will auto-populate a list of department in that location. how do i go about on connecting the two drop down list together so when location is changed, it connects to the appropriate row in the database?
Is it possible to populate the values of a drop down list inside a repeater when the user chooses to activate the drop down list? I have a page that has 2300 rows of data generated by a repeater. The users have the option of showing a drop down list or not. If the drop down list is shown, right now I bind the values in the drop down list at the time the repeater is generated so they are available immediately.However, this adds an additional 2mb of data to the page, which increases the amount if time that it takes to render the page. I am being asked to decrease the page size. The idea they have is that if I only load the first value of the drop down list into the repeater, the amount of data on the page would drop significantly (which it does).
The problem becomes, how do I then load the remaining items into the drop down list when the user SELECTS the drop down list? These aren't static values, they are completely dependent on the data row key, so I have to go out to the DB and get the values for that individual row.I thought maybe AJAX and jquery, but can that be done inside the repeater?Ayone have any ideas as to if/how this could be done? Personally, I think the users should be educated that it is going to take an additional 5 seconds for the page to load if they choose to display the dropdowns, but the business is hesitant to go that route.
I have a date and I need to populate a drop-down with the months/years between that date and today. For instance, if that date is 10/14/2010 then the drop-down should contain October 2010, November 2010, December 2010, January 2010.
The way I'm thinking of doing this is to pass that date to a function, loop from today backwards step 1 month while adding each month to a collection until we reach that date and finally return a collection of strings. Then, populate the drop-down control on page load. Finally, use some ajax with a page method to parse back the string and trigger a partial page reload.
This may or may not be possible but I'm trying my best to find out, I'm a complete novice when it comes to ASP.At the moment I have drafted a basic html page. This page contains a drop down list and several tables all hidden by javascript and then displayed based on the drop down selection (onchange event)I'm trying to convert this into an asp page so that I can dynamically populate the drop down from a table (this will be a list of names)and then based on the drop down selection (onchange does not necessarily have to be used, could maybe use a submit button) will populate a table below the input box with all the information for that name, in many cases this would be multiple rows.
View 3 RepliesThis is my GET Method to get my data from my DataTable
Private Function GetData() As PagedDataSource
' Declarations
Dim dt As New DataTable
Dim dr As DataRow
Dim pg As New PagedDataSource
' Add some columns
dt.Columns.Add("Column1")
dt.Columns.Add("Column2")
' Add some test data
For i As Integer = 0 To 10
dr = dt.NewRow
dr("Column1") = i
dr("Column2") = "Some Text " & (i * 5)
dt.Rows.Add(dr)
Next
' Add a DataView from the DataTable to the PagedDataSource
pg.DataSource = dt.DefaultView
' Return the DataTable
Return pg
End Function
It returns the DataTable as "pg"
What changes must I make to this GET method to get the records from a table in my database?
C# examples will also do but would be great to see a reply with my code and then the changes....
I'm trying to dynamically populate a drop down box with fields from a SQL Server Database, but I'm having some issues. I am able to get it to work well with only one field, but I need to get display two fields in the ddl. I've seen that you can do it in the command statement, but I have two different data types and I think that causes it to throw an error: Conversion failed when converting the varchar value 'This is a Title' to data type int.
here is my code:
[Code]....
I want to do a drop down for the year and month for a calendar object. How would I go about that:
[Code]....
Using: VB.net code; Visual web developer 2008; Asp.net; SQL server 2008 db