Binding Dictionary To DataTextField Property Of DropDownList
Oct 29, 2010
I have a State class defined like this:
Public Class State
Public Property StateId As Integer
Public Property Name As Dictionary(Of Integer, String)
End Class
Name(x) contains the state name in different languages. I get a collection of State from the method StateManager.GetAllStates() and I want to bind this collection to a DropDownList. The problem is that I can't find how to set the DataTextField property to let's say stateList.Name(1) which is the english name of my state.
Dim stateList As StateCollection = StateManager.GetAllStates()
Me.DataSource = stateList
Me.DataValueField = "StateId"
Me.DataTextField = "Name(1).Value" <-- Problem here
Me.DataBind()
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Aug 13, 2010
I would rather not magic string my DataTextField/Values on the dropdownlist after setting up the source as a List collection of objects.
I was thinking I could use the DataSource properties but it doesn't seem to like the couple of ways I tried.
WORKS BUT NOT IDEAL
//set the datasource to the returned List<Cart>
this.cartDdl.DataSource = CartManager.Load(WebProfile.Current.UserName);
//set the DataValueField to the Cart.ID property
this.cartDdl.DataValueField = "ID";//would rather use the obj property Cart.ID
//set the DataTextField to the Cart.Description property
this.cartDdl.DataTextField = "Description";//would rather use the obj property Cart.Description
//Bind the ddl to the datasource
this.cartDdl.DataBind();
HOW I WOULD THINK IT COULD WORK this.cartDdl.DataValueField = ((Cart)this.cartDdl.DataSourceObject).ID; this.cartDdl.DataTextField = ((Cart)this.cartDdl.DataSourceObject).Description;
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Jan 30, 2011
i get a list of objects from the Entity Framework data context.
var list = context.EntityA;
the EntityA is the main object (contains the primary key), but has a navigation property called "EntityALanguages", which contains language specific properties.
now i want to bind the list to a dropdownlist and need so set DataValueField and DataTextField properties from the dropdownlist.
how can i set the DataTextField to a property of a navigation property, something like:
this.ddl.DataValueField = "GUID";
this.ddl.DataTextField = "EntityALanguages.ShortDescription";
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Oct 28, 2010
So here is the problem , Is it possible to get the "SelectedItem.Text" of a binded dropdownlist? because everytime I'm getting null Even though I'm having
items in the dropdownlist.
I'm getting the items that I want in the dropdownlist but I can't find out which one is selected.
[Code]....
here is my aspx code:
[Code]....
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Feb 5, 2010
I have a list <Department> say Company.Departments with object Manager and ManagerId, ManagerName as property of Manager. I would like to fill the dropdownlist with managers as below
ddlManager.DataSource = Company.Departments;
ddlManager.DataTextField = "ManagerName";
ddlManager.DataValueField = "ManagerId";
Is there a way to specify the property of an object in DataTextField or I need to copy a Manager list for the DataSource?
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Mar 27, 2010
Is there a way to display several records in the datatextfield in a asp dropdownlist? I know the fix when populating the dropdownlist from a datagrid was to edit your SQL query but the values I am receiving are sent via an XML string. The idea would be to display a name, price, and date in the dropdown text. Currently I am getting the following error: DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'MonetaryValueServiceType' While using UPSDropDown.DataTextField = "MonetaryValue" & "ServiceType" Is there a work around to do this? The only other option is to use radio buttons (which are also a nightmare).
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Jun 1, 2010
I'm currently working with a control that inherits from DropDownList (it has some extra functionality that isn't really relevant to this question, but it gives me a nice place to implement the extra stuff I'm gonig to discuss).
We're using data binding, with the DataTextField and DataValueField working absolutely fine. However, I find myself in need of a similar field that will control whether or not the item is enabled. (I've already overridden the RenderContents method of the control so it properly renders non-Enabled items, since DropDownList doesn't do this by default.)
Thus I'd like to know how to override the DropDownList's data binding so it acts exactly as normal, except a further field from each DataSource item is applied to each ListItem's Enabled property.
(NB: the field I'll be binding to isn't a straight boolean, and doesn't have an explicit/implicit cast to boolean, so I'll probably be "passing" it as a string.)
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Mar 24, 2011
I have a dropdownlist for which I am loading data from excel. Excel has 2 columns Product and Email. Data in Product column is binding to DataTextField and Email column to DataValueField. The dropdown works fine when email is different for different product but when email has same value for different product then whatever I select, on postback the selected value changes to the first item of the same email value.
Below are the sample data in Excel to show the behavior of dropdown
Example 1. (Drop down works fine for this example)
Product Email
iPad prashanth364@gmail.com
iPhone 3G prashanth364@yahoo.co.in
iPhone4 prashanth364@in.com
Example 2. (In the example below, whatever I select (iPad or iPhone 3G or iPhone4) on post back the dropdown selected value will be iPad)
Product Email
iPad prashanth364@gmail.com
iPhone 3G prashanth364@gmail.com
iPhone4 prashanth364@gmail.com
Example 3. (In the example below, when I select iPad the dropdown works fine but when I select iPhone 3G or iPhone4 on post back the dropdown selected value will be iPhone 3G. Basically, on selecting iPhone4 here, on post back it shows iPhone 3G)
Product Email
iPad prashanth364@yahoo.co.in
iPhone 3G prashanth364@gmail.com
iPhone4 prashanth364@gmail.com
Below is the function where I am loaidng the data from excel to dropdown private void ExtractFromExcelInitial()
{
// Put user code to initialize the page here
// Create connection string variable. Modify the "Data Source"
// parameter as appropriate for your environment.
string ExcelFilePath = Server.MapPath("~/ProductExcel") + "\ProductEmail.xls";
String sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + ExcelFilePath + ";" +
"Extended Properties=Excel 8.0;";
[Code].....
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Feb 18, 2011
I have an Accordion control with several panes.
On page load I want to set controls inside the panes with data from dictionary (every pane has from 1 to 10 controls).
ASPX
<cc1:Accordion ID="Accordion1" runat="server"
FadeTransitions="True"
SelectedIndex="0"
HeaderCssClass="accordionHeader"
[Code]....
On aspx, I want to create Pane for every section (in this case 2 panes), and in every pane define Eval for needed value.
p.s. I don't think it metters but if dictionary binding is a problem I can bind something else like xmldocument or so...
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Aug 20, 2010
in dropdownlist show the all PatientName and save the PatientID . how to show the PatientName in DataGrid.
PatientID, PatientName are Foreign Keys. In DataBase on Save the the PatientID my requiredment is PatientName show in DataGrid based on PatientID.
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Feb 17, 2011
I have an Accordion control with several panes.
On page load I want to set controls inside the panes with data from dictionary (every pane has from 1 to 10 controls).
protected void Page_Load(object sender, EventArgs e)
{
[Code]....
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Sep 14, 2010
i m beginner in asp.net mvc , i have strongly typed view and i m passing my dictionary in view as :
Dictionary<Guid,IYummyWebAppMVC.Models.Restaurant.Menu>>" %>
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Mar 2, 2010
How to multiple fields in DropDownList DataTextField and DataValueField
[Code]....
[Code]....
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Sep 15, 2010
So what I'm trying to accomplish is this
[Code]....
The user control has public properties named accordingly and the page has protected properties accordingly which I've verified have the desired values.
For some reason the values are always empty strings or 0s in the usercontrol, no matter what the page property is.
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May 24, 2010
I have a class (SearchClass) in which i have Origin property which is a "Address" datatype. I want to use the "Search" class in my Search.aspx. I want to bind the City field data to a CheckBoxList, but i could not do so? If it is a straight property of Search class i could do so, but if it is a property then i could not. "I am getting error "City" is not a valid DataTextField of something like that. The point is it is not recongnised. I even tried to inherit the Address class from Search.cs class, but i just see blank data. Now i am trying to a different thing. i.e. Inherit the Address in Search.cs class and while pouplating the Search Results in to a List object i am also planning to set the data of City too, along with populating the whole Address objects and try to use it in my binding. Is there any other way to do this (i mean more efficiently)?
SearchClass.cs:-
[Code]....
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Sep 29, 2010
I was wondering why this doesn't work:
Is it possible to declaratively bind to an Object's property.
<asp:DropDownList id="ddl" runat="server"
DataValueField="Key"
DataTextField="Value.DisplayName" />
Code Behind
var d = new Dictionary<int, MailAddress>();
d.Add(0,new MailAddress("foo@bar.com", "Mr. Foo");
d.Add(1,new MailAddress("bar@foo.com", "Mr. Bar");
ddl.DataSource = d;
ddl.DataBind(); // Error. It doesn't like "DisplayName"
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Mar 17, 2011
I've got a Dictionary<string, string> object I'm creating:-
[Code]....
and I wanted to bind this to a dropdownlist. I know this is possible in code-behind, but is it possible to do this directly on the asp: control, something like
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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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Dec 23, 2010
I have a class that maintains a static dictionary of cached lookup results from my domain controller - users' given names and e-mails.My code looks something like:
private static Dictionary<string, string> emailCache = new Dictionary<string, string>();
protected string GetUserEmail(string accountName)
{
if (emailCache.ContainsKey(accountName))
{
return(emailCache[accountName]);
}
lock(/* something */)
{
if (emailCache.ContainsKey(accountName))
[code]...
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Mar 16, 2011
Is their any way I can bind each column of the grid seperatly with each property? It is possible to do that in web form, but i am not sure about MVC grids.
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Jan 20, 2010
For the life of me I cannot bind the Checked property of a CheckBox control within a TemplateField (declaritively).
I have tried:
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="deactivated" runat="server" checked="<%#Eval("Deactivated")%>"></asp:CheckBox>
</ItemTemplate>
<asp:TemplateField>
And
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="deactivated" runat="server" checked="<%#Eval(Container.DataItem, "Deactivated")%>"></asp:CheckBox>
</ItemTemplate>
</asp:TemplateField>
</asp:TemplateField>
I keep seeing a warning stating: Cannot create an object of type 'System.Boolean' from it's string representation' 'for the 'Checked' property.
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Jan 28, 2011
I want to make my column unique identifier as well as the indexer.I used autoincrement property but when we delete specific row then the below rows are not in order like
if we have
1
2---delete 2nd row
3
then it will be
1
3
but i want the o/p as
1
2----3rd row is now 2nd row
Is there any way like 'Default value or Binding=Row_Number()' something??
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Jul 16, 2010
I'll use Customer and Addresses as an example rather than explain my real objects. Say I have a repeater bound to a collection of Customers and one of the properties of Customer is an array of addresses. How do I bind to the addresses property? I don't even need to display this information I just want to use it in the Repeaters ItemDataBound event. So I tried to bind a hiddenField to the addresses property but all I get for every customer in the hiddenfields value is an empty array of addresses.
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May 19, 2010
I have an ASCX that inherits from a WebControl that has a 'CustomConfiguration' property of type CollectionConfigurationItem. This configuration gets set elsewhere in the code, so by the time it gets to the ASCX it is set up to how I wish to use the data. At this point I'd like to render out another control using this configuration, like so:
<modules:DataModule runat="server" CustomConfiguration="<%# Model.CategoryListConfiguration %>" />
However, breaking into DataModule always results in 'CustomConfiguration' being null, which is the default value for the property. I've tried adding a Bindable attribute to the property but to no avail, and when I set an EventHandler for the DataBinding event on the DataModule it doesn't even get called.
How can I set this custom-class-typed property from the markup or, failing that what's the second-best method of getting this to work?
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Nov 11, 2010
I've got a SQL Server database with a table in it, which lists the file names of images. It's my intention to assign the ImageUrl of an Image control on the page, from the data in the table. I've placed a SQLDataSource control on the page, and then tried putting a FormView control there, and an Image control within that. But I don't see how I can assign the value to the ImageUrl property via data binding.
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