.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

combobox selected item value doesnot get updated when binding value changes

Posted By:      Posted Date: October 10, 2010    Points: 0   Category :WPF

i have a combobox  as below






<ComboBox TextSearch.TextPath="Label"

View Complete Post

More Related Resource Links

highlighting the text of the selected item in Ajax Combobox


Is there a way to programmatically select the entire string of the selected item in the AJAX Combobox?

What I'm trying to do is bascially on a State/City selection.

1.  User selects a State from the first combobox.  This triggers the City combobox to be populated.  The item(0) is "Select One:".

2.  I want the entire "Select One:" to be hightlight as if the user had used their mouse and highlighted all the text.

The reason for this that I'd like the user to be able to start typing the city without needing to clear out the "Select One:" manually.

Can this be done?

C# data bound combobox: display selected item text in separate label.content


I am new to C# but I'm resisting the urge to run screaming back to VB.NET. I'm working with a WPF application using C# code-behind and a lot of binding to a SQL 2005 database backend.

GOAL: I have a comboBox bound to a tbl_Systems entity which provides a list of systems for user selection. When the User selects a system from the comboBox I want to display the selection's text in a separate Label. The big picture is that several comboBox selections will be used to build a query string that will populate a listbox. So, I want to display these selected values in the Label so the user can see the query string they have dictated.

PROBLEM: When I set the Label content property to the comboBox SelectedItem property the entity tbl_System is displayed in the Label not the comboBox selection text.

SUSPICION: From reading similar examples in VB I suspect that the comboBox SelectedItem is actually a "datarowview" or the C# equivalent. But I don't know how to translate this explanation to C#.

The UI XAML comboBox properties are set as such:


Combobox Set Selected Item from DataContext


i have a listview that houses a gridview .

I have the first column as combobox column defined in the datatemplated of the firstcolumn

I have set the Datacontext of the listview to a datatable having the folowing columns

Code,Name ,age.

i am able to set the binding for the 2 textboxes .

Here , the Code combobox has a set of allowed values that i am fetching from the Db as a datatable again .

now my requirement here is

1) to set the Itemsource of the combobox to the datatable. so that it has all the allowed codevalues.

2) the comboxbox for that particular row must show the (Selecteditem) corresponding value from the dataset of the Listview.

I am unable to set it itemsource directly because its in the datatemplate.

and i am unable to set binding to the selected item too.

Any help?

I tried setting the SelectedValue="{Binding Path=Code}" And its successfully getting the value.

But because i am unable to set the itemsource of it . i have written a Loaded event of the combobox and there i am settin the itemsource of it.

Hence Because of this. The selected value of the combobox is gettin overridden and is reset to null wheni am setting the itemsource.

i just need a way to set the itemsource first and then the binding to fire.


Override ComboBox Text property after selected an item


Hi All

I tried many ways , but have non can successfully alter the combo box Text after selected an item from drop down, and I want to make sure this is just not possible.

This is what I need, if after I selected an item - "1 apple" from the drop down, i want the combo box shows text, "1". I tried write code in different eventhandlers, overrider Text property, clear items . non of those way can achieve this.

 public class AccountComboBox : ComboBox
    public override string Text
        return base.Text;
        if (this.SelectedItem != null)

          base.Text = SelectedItem.ToString().Remove(this.SelectedItem.ToString().IndexOf(" "));

ComboBox : Display selected value with Binding



I have a problem with my ComboBox, it won't show the selected value even if it select it. Items are binded.

Code behind: Me.DataContext = from Miss in myXDoc.<Miss>

Code XAML :





Remember the last combobox item selected.



    I have this combobox and I have binded the combobox to the class which inturn is binded with the Database Column so that the items of the combobox is dynamic. If we add the items to the database column the combobox's item is also updated. Now I want the combobx to remember the last item selected. I have created a new table in the database so that I can store the last selected value.

its designer xaml

<Window x:Class="MySampleApplication.Window1"




how can i return selected item from comboBox in separate thread ?


i want to return selected item from comboBox in separate thread ? >>>>  desktop application ( c# )

error message: Cross-thread operation not valid: Control 'comboBox3' accessed from a thread other than the thread it was created on.

any one can help me plz ......

How to keep the hover for Parent menu and set the selected menu item css for child menu item?



I'm using cssfriendly control adapter for menu. My asp.net menu control's datasource is a sitemap file I'm using which contains all the urls.

I have the following questions:

  1. Is there a way to keep the parent menu item hovered while hovering over the respective child menu items?
  2. Is there a way to keep the child menu item selected? I am able to set the css for the parent menu, however I was wondering if the same is possible with the child items.

Please help! Smile


Moneka Smile

ASP.NET 4.0 Menu Top Level selected item style


I want to apply a css class to the level 1 menu item (parent) when it or any or it's children are selected.

I've looked at MSDN documentation and any number of examples and walkthroughs but I haven't come up with a way of managing this. I was thinking something like this might work but the style is not being applied to the parent. To further complicate matters, if I try to apply a css style to StaticSelectedStyle it doesn't pick it up at all.

Menu Markup:

<StaticSelectedStyle  Font-Bold="True" ForeColor="#3333CC" />

Code Behind:

        protected void MenuItemClick_NavMenu(Object sender, MenuEventArgs e)


            MenuItem parentItem = e.Item.Parent;

            if (parentItem != null)


                parentItem.Selected = true;



Dynamically Populate a DVWP depending on selected item



I am wanting to create a dashboard page with several data view web parts which dynamically populate depending on what item is selected in a separate web part (drop down form or just a list of links).  Can someone please point me to a tutorial or documentation on how to pass data between web parts or to a DVWP?  I have searched for a few hours and not been able to find anything useful.



Binding value to combobox or dropdown


How can we bind a value to a combobox or dropdown? What is the property for binding a value? 


Javascript code to copy selected dropdown item to clipboard

Does anyone know how I can do this to get the text onto the clipboard?  <input id="Copy" type="button" value="Copy Url" runat="server" onclick="copy();" style="vertical-align: top;" visible="false"/><script type="text/javascript"> function copy() { var sel = document.getElementById("DropDownList1"); var text = sel.options[sel.selectedIndex].value; ??? } </script> </body>  

Button to copy selected item in dropdown to textbox

Hi, I found this bit of code which I tried and it isn't working. I just want to place a button next to a dropdown, and when clicked, the selected item in the dropdown will put into another textbox. <head><title>Untitled</title></head><body><script type="text/javascript">function copy() {var sel = document.getElementById("names");var text = sel.options.value;var out = document.getElementById("output");out.value += text+"\n";}</script> <select id="names"><option>Product One</option><option>Product Two</option><option>Product Three</option><option>Product Four</option></select><input type="button" onclick="copy()" value="Copy"><textarea id="output"></textarea> </body></html>   I saved this as a file and opened it in IE to test and nothing went into the textarea. Also i tried it in Firefox and the textarea said undefined each time I click the button. Can someone help to get this working?

how to get selected value from combobox?

i have combobox which populated with data from sql db now when user select value i want to get selected value in combobox in this code i get the place of the value in sql table but not value himself can anyone help me??   private   void button1_Click(object sender, RoutedEventArgs e) {     int selectedIndex = comboBox9.SelectedIndex;   Object selectedItem = comboBox9.SelectedItem;   MessageBox.Show("Selected Item Text: " + selectedItem.ToString() + "\n" +   "Index: " + selectedIndex.ToString()); } i get showbox  "  slected item text system.data.dataRowView"

VS2008 and C#: How to create a short cut for a selected item in a ListView/TreeView ?

How to create a short cut for a selected item from a ListView/TreeView ? Is it possible to provide a smaple code ? Thanks,

TextBox shows binding source text when window load, so why not with the ComboBox?

How can I get a ComboBox to show the binding source value when my window opens?  I have been searching all day for a solution to this, but cannot find anything.  So I have created a sample project to demonstrate my problem.  Below is a Vehicle class, very simple, two members Category and Make.  Category is an enumeration, Make is a string. namespace ComboExample { public class Vehicle { // Constants and enumerations public enum eCategory { Road, Air, Sea } // Attributes public eCategory Category { get; set; } public String Make { get; set; } // Construction public Vehicle(eCategory Category, String strMake) { this.Category = Category; this.Make = strMake; } } } Here is the C# for the MainWindow.  A new Vehicle object is created as a member.  In the constructor I set a data-provider in the XAML to this Vehicle object.  There is a button event for showing the values of the controls and objects so I can check the binding. namespace ComboExample { // Interaction logic for MainWindow.xaml public partial class MainWindow : Window { // Attributes Vehicle m_Car = new Vehicle(Vehicle.eCategory.Road, "BMW"); // Construction public MainWindow() { InitializeComponent(); // link data-p

Can't select combobox item with mouse

I have a bizarre issue with my wpf 3.5 app that I just wrote. One of the computers we installed it on won't allow the user to select an item from the combobox with the mouse. The mouse can make the drop down appear like normal, but when the mouse hovers over the items they are not highlighted and clicking on one closes the drop down but doesn't select the item. This is the default combobox with no style and only the margin, itemssource and selecteditem properties set. I tried other programs that have comboboxes (IE7, Excel, a VB6 app) and all of them work just fine. We have this program installed on numerous computers throughout our company and everyone else's is working correctly. I tried uninstalling the program and the .NET framework then reinstalling. I don't know what else to try.
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend