MVC :: Using HTML Dropdownlist?
Jul 16, 2010
We are facing many challenges in using HTML dropdownlist in MVC web role. We want to get the value of the item selected by user from dropdown and based on that we want to populatee value of another text box. However whenever we tray to do so we always getthe value null b'coz ViewData returns null. In case any one has tried this kind of scenario, then plesae share your complete code - HTML declaration as well as the corresponding Action Result?
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Similar Messages:
Jun 11, 2010
Is it possible to get an object of type <T> as selected value?
I have an object "SearchInput" with a member "Bu" of type "BusinessUnit".
I would like to show a select box so that the user can select one of them.
The following code populates the list in the action method:
[Code]....
In the strongly typed view (with SearchInput as model) the list is displayed like this:
[Code]....
which passes only the selected Id but I would like to use the first option.
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Sep 14, 2010
This has to be a simple thing, but for whatever reason, I'm just not finding it.I want to use the HTML Helper function to create a DropDownList based on a List<string> (and actually have it bind to the data field on the model). The simplest example, I suppose, would be:
<%: Html.DropDownList("Material",
new
SelectList(new[][code]....
This creates the items in the drop-down, but of course, there's nothing in this line that would bind it to my model (model.Material). I've done drop-downs with collections of models, where you can bind the Data and Display attributes to properties of the class, but I don't have a class here, just a List.
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Oct 14, 2010
I'm not sure how to load a dropdownlist for the HTML.DropDrownList.
In controller:
List<SelectListItem> _itemList = new List<SelectListItem>();
SelectListItem _item = new SelectListItem();
_item.Text = "First"; [code]....
Results :my dropdown displays "System.Web.Mvc.SelectListItem" ...where I'm expecting the "First" (the _item.Text).
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Oct 21, 2010
Im using asp.net mvc 2. I have a model Supermodel that consists of 2 models TestModel1 and TestModel2. In SuperModelView Im doing the following thing:
<%: Html.DisplayFor(x=> x.TestModel1, "TestModel1Template") %>
Its working just fine, except for the fact, that dropdownlist is populated but selected value is not set.Im using the following code for a dropdownlist in my template:
<%: Html.DropDownListFor(x=> x.Property1, (IEnumerable<SelectListItem>)ViewData["MyDDLList"], Model.Property1) %>
and its not setting the selected property. I put the code below to SuperModelView, that calls <%: Html.DisplayFor To populate the template and it works just fine.
<%: Html.DropDownListFor(x=> x.TestModel1.Property1, (IEnumerable<SelectListItem>)ViewData["MyDDLList"], Model.TestModel1.Property1) %>
UPDATE: I`ve tried to investigate the issue, but something is totally wrong. I can share the whole code, not sure where to put it, here or attach with separate files.
@Darin, what other parts should I share, or just share the whole model view and controller files?
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Jan 14, 2011
so I have the following html.dropdownlist;
[Code]....
how do I get the value/item selected in my controller?
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Feb 22, 2011
I've been all over the Internet looking for an acceptable solution to this issue, but didn't find one, so hopefully I'll have more luck here. I've got a Html.DropDownList control in my application that pulls in a set of values from the database. That works just fine. However, I want to set the selected value in code, which has never worked correctly. This is, in my opinion, one of the worst implementations of Html helpers in MVC. Here's the culprit:
[Code]....
OK, it takes in a list of statuses and gets the text/value options set without a problem, but doesn't ever render the selected value on the option with a value (ID) of "5". I've stepped through the code as it is assigning these values, and it
does set the value of that option to select = true, but the rendered html doesn't reflect this. I recall something about this helper using the Model to set its selected value, but why will it not allow the value to be explicitly set? Even better, if for some reason explicitly setting this in code isn't going to work, why allow it as viable code, and just silently fail? I'm all for this coding by convention approach MVC has taken, but when the convention is explicitly overridden in code, the code should prevail, I would think.
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Mar 9, 2011
I need to render a few DropDownLists on my page, allowing the user to select different Categories & Locations so as to return different result sets based on their selection.
However, I want each of the resulting selections to be crawlable. I know I could just render every possible Category, Location etc as standard HTML links on the page, which perform a GET request to the specified URL, but if possible I'd like to contain all these options within a DropDownList to keep things less cluttered.
If I were using MVC I would consider wrapping that small section of the page in a GET form, with each ListItem value being the destination URL (though I wonder if even this approach would be properly crawlable?).
I am using Web Forms though and am just having trouble trying to come up with a solution.
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Mar 7, 2011
I need a control that selects Html.DropDownlist elemnti with the checkboxes you can have an example with the extension method?
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Oct 29, 2010
I have two tables, Users and Roles. The roles table is a reference table for the different roles of my site (RoleId and RoleName columns). The Users table contains profile data for each user, including a RoleId column that is FK'd back to the Roles table [RoleId].
Both tables are in a Linq to SQL model.
I have an edit page created which lists all the profile values of a user. The edit page inherits the User model. One of the editable values is the RoleId field. I want to set this up to be a drop-down list that contains items labeled using the RoleName column of the Roles table, and matched with values of RoleId.
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Mar 6, 2010
i have two dropdownlis for showing State and City. when i select a state i want to show city's state.
how can i send value's state to controller and return list of city to view.
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Mar 2, 2011
i am using html dropdownlist which is mapped with database using jquery. I want that person select 2 or more than 2
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Mar 2, 2011
I need to populate a dropdownlist with results from a linq query done in my controller. I want users to be displayed but when the item is selected and submitted, the userid is passed back to the controller.my controller:
[Code]....
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May 30, 2010
I have a html.dropdownlist on my webpage as follows: <%=Html.DropDownList("MyDropDown", Model.Data, new { @class = "dropdown"})%> I am populating the dropdown with ~80 items. The issue is that when I click the dropdown the list of items is rendered from the top of the screen to the bottom of the screen. How can I set up the dropdownlist so that it only displays a maximum of 20 items when the dropdown menu is clicked (i.e. user needs to scroll down to see items 21 - 80)?
I was anticipating (!) that there would be a html.dropdownlist property to control the number of displayed items that would allow something like the following e.g.: <% =Html.DropDownList("MyDropDown", Model.Data, new { @class = "dropdown", rows ="20"}) %> From research I have been doing on the msdn website it appears that there is no such property and that each browser has its own rules of how many items are displayed in a dropdownlist (?).
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Jul 18, 2010
For my ASP.NET page, in the code behind I load various items/options into a DropDownList but I do not set a default by assigning SelectedIndex. I notice for the postback SelectedIndex is set to 0, even if I never set focus to or changed the value in the DropDownList.
If not otherwise specified in the code behind or markup, will a default value of 0 be used for the SelectedIndex in a postback with a DropDownList? If yes, is this part of the HTML standard for selection lists, or is this just the way it is implemented for ASP.NET?
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Feb 7, 2010
I have a MVC dropdown list (Html.DropDownList) with list of Movies populated. I want to retrieve both Title(value field), Description(Text field) when I perform the form Submit. I can access the Title(value field), but I can't access the description. My code sample is below.
[Code]....
public string CinemaName { get; set; }
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Sep 2, 2012
i have 2 DDL in my page that when users select item from ddldistric1 item in ddlcity1 will change these are my code
protected void DDLcity1_SelectedIndexChanged(object sender, EventArgs e)
{
BindDistrictC();
}
private void BindDistrictC()
[code]...
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Jan 8, 2013
I am having two dropdownlist in my project,one dropdownlist for empid, another dropdownlist for month, if the user select the empid, the values are retrieved in the textbox.
In the second dropdownlist, if the user select the month in the dropdownlist it will display the leave details, its all working fine, if the user again select the first dropdownlist that means empid, I want to show the second dropdownlist as select month, how can do this.....
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Apr 15, 2010
I am having a problem with disabling DropDownList based on the chice of 1st DropDownList, there is no post back occuring, and it is a template based web app here is the current code:
<script type="text/javascript">
$(function() { var dropDownList1 = $('#<%= ddlUserType.ClientID %>');
var dropDownList2 = $('#<%= ddlMember.ClientID %>'); dropDownList1.change(function(e) {
if ( jQuery("#ddlUserType").val() != "ETOC") dropDownList2.removeAttr('disabled'); e.preventDefault();
else
dropDownList2.removeAttr('enabled'); e.preventDefault(); }
} );
</script>
what is happening now is page is blank and if I remove the above code everything shows, where I am going wrong. here is the plain and final javascript code which worked:
<script language="javascript">
function CheckDropDownState(lstbox)
{
if (lstbox.selectedIndex == 3) { document.forms[0].ddlMember.disabled = 1; }
else { document.forms[0].ddlMember.disabled = 0; }
}
</script>
and thew .aspx code: <asp:dropdownlist id="ddlUserType" runat="server" onclick="CheckDropDownState(this);"></asp:dropdownlist>
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Mar 29, 2011
I have a table and 7 column name.
I bind the 7 column name in one dropdownlist.
Now the problem is,how do I extract the data value in a dropdownlist?
For example,
Dropdownlist contain 7 column name
-subject_name
-subject_code
-venue
-time
-seat_no
-admission_no
-subject_id
when I click the subject_name,I want it to appear in a gridview
Example
Math|9.00-10.00|Hall|18|09090J|...
Below is my current codes which I have a problem.
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source= EN\SQLEXPRESS;" + "Initial Catalog=ms;Integrated Security=SSPI");
SqlDataAdapter adapSel;
string mySQL = "SELECT '" + dd_list.SelectedValue+ "' FROM examtimetable ";
adapSel = new SqlDataAdapter(mySQL, conn);
conn.Open();
DataSet dsSel = new DataSet();
adapSel.Fill(dsSel);
GridView1.DataSource = dsSel;
GridView1.DataBind();
conn.Close();
}
Previously I have bind 7 column name in my dropdownlist
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack == false)
{
SqlConnection conn = new SqlConnection("Data Source= EN\SQLEXPRESS;" + "Initial Catalog=ms;Integrated Security=SSPI");
SqlCommand sqlCmd = new SqlCommand("select column_name from information_schema.columns where table_name='examtimetable' and COLUMN_NAME not like '%ID'", conn);
conn.Open();
SqlDataReader ds;
ds = sqlCmd.ExecuteReader();
dd_list.Items.Clear();
dd_list.DataSource = ds;
dd_list.DataTextField = "Column_Name";
dd_list.DataValueField = "Column_Name";
dd_list.DataBind();
dd_list.Items.Insert(0, "Select Option");
ds.Close();
conn.Close();
}
}
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Nov 15, 2010
i use 2 dropdownlist with 2 object data source first dropdownlist to display departments name using object datasource (field to display DeptName , value of field DeptID)
second dropdownlist to display Employee name but depend on departments (field to display EmpName , value of field EmpID)
how to display employee name in dropdownlist depend on departments name in the other dropdownlist
2 tables
1 table deprtments with column (DeptID , DeptName , DeptDescription)
2 table Employee with column (EmpID , DeptID , EmpName)
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Mar 28, 2011
Currently,below is my code.
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source= E\SQLEXPRESS;" + "Initial Catalog=k;Integrated Security=SSPI");
SqlDataAdapter adapSel;
string mySQL = "select column_name from information_schema.columns where table_name='examtimetable' '" + dd_list + "'";....
I receive an error "Incorrect syntax near 'System.Web.UI.WebControls.DropDownList'."
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Sep 6, 2012
protected void DDLzone1_SelectedIndexChanged(object sender, EventArgs e)
{
BindDistrict();
}
[Code]......
here when i click on ALL item from ddlzone1 it just "ALL" item in ddldistrict
i want when i select "ALL" item from ddlzone1 in ddldistrict14 show all data from database
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Aug 12, 2012
i have 3 drop down list in my page
1-ddlzone1
2-ddldistrict1
3-ddlstore1
this is ddlzone1 code
protected void DDLzone1_SelectedIndexChanged(object sender, EventArgs e) {
DDLstore1.Items.Clear();
DDLstore1.Items.Add(new ListItem("select center", ""));
DDLstore1.AppendDataBoundItems = true;
SqlCommand _cmd = new SqlCommand("selectcenter", _cn);
[CODE].....
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Mar 8, 2010
I want to making another dropdownlist visible=false when clicking in dropdownlist on the same detailsview?
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