Get text of RadAutoCompleteBox

问题

How can I get the text of a RadAutoCompleteBox using RadControls Q1 2013 in C#?

autoCompleteBox.SelectedItem returns "ServerCrafterTelerikWPF.Command".

Edit 1: Here's my XAML:

<telerik:RadAutoCompleteBox x:Name="txtboxCommand" ItemsSource="{Binding Commands, Source={StaticResource ViewModel}}" 
DisplayMemberPath="ACommand"  AutoCompleteMode="Append" HorizontalAlignment="Left" 
telerik:StyleManager.Theme="Modern" Margin="280,405,0,0" 
VerticalAlignment="Top" Width="330" Height="30" KeyDown="txtboxCommand_KeyDown"/>

And I don't have any C# code. I just want, when a button is pressed, to get the text that is in the RadAutoCompleteBox.

Edit 2: And here's my collection:

public class Command
{
    public string ACommand { get; set; }
}

/// <summary>
/// A view model for MainWindow.xaml
/// </summary>
public class ViewModel
{
    public ObservableCollection<Command> Commands { get; set; }

    public ViewModel()
    {
        Commands = new ObservableCollection<Command>()
            {
                new Command() {ACommand = "stop "},
                // Other commands...
                // ...
                // ...
            };
    }
}

回答1:

You should take it from the SelectedItem property. Cast it to your class and then get it from MyClass.ACommand

And I suggest binding SelectedItem with Mode=TwoWay in your ViewModel can help a lot.

Just add a Member to ViewModel which is implementing Command like:

private Command _SelectedItem;

public Command SelectedItem 
{ 
   //get set with INotifyPropertyChanged 
}

Then from the xaml: Bind RadAutoCompleteBox's SelectedItem Property like:

SelectedItem="{Binding SelectedItem, Mode=TwoWay}"

回答2:

I have reproduced the problem.

Yes. I had the same problem. And I found the problem and the answer too.

I got the problem because of using of type string for the selected item in my view model.

private string selectedCommand;

public string SelectedCommand
{
    get
    {
        return selectedCommand;
    }
    set
    {
        selectedCommand = value;
        NotifyPropertyChanged("SelectedCommand");
    }
}

Use the type as Command class and your problem will be solved.

private Command selectedCommand;

public Command SelectedCommand
{
    get
    {
        return selectedCommand;
    }
    set
    {
        selectedCommand = value;
        NotifyPropertyChanged("SelectedCommand");
    }
}

Bind the SelectedItem property of the RadAutoCompleteBox in the XAML

<telerik:RadAutoCompleteBox 
            x:Name="txtboxCommand" 
            ItemsSource="{Binding Commands, Source={StaticResource ViewModel}}" 
            DisplayMemberPath="ACommand"  
            AutoCompleteMode="Append" 
            HorizontalAlignment="Left" 
            telerik:StyleManager.Theme="Modern" 
            Margin="280,405,0,0" 
            VerticalAlignment="Top" 
            Width="330" 
            Height="30" 
            KeyDown="txtboxCommand_KeyDown"
            SelectedItem="{Binding SelectedCommand, Mode=TwoWay}"/>

If you wanna get the selected item by the code-behind, convert the selected item to the Command class type.

var selectedItem = autoCompleteBox.SelectedItem as Command;

And actually there can be multiple selected items. In that case you have to define a collection of Command objects.

private ObservableCollection<Command> selectedCommands;

public ObservableCollection<Command> SelectedCommands
{
    get
    {
        return selectedCommands;
    }
    set
    {
        selectedCommands = value;
        NotifyPropertyChanged("SelectedCommands");
    }
}

And bind it to the SelectedItems property (plural of SelectedItem) of the RadAutoCompleteBox control.

SelectedItems="{Binding SelectedCommands, Mode=TwoWay}"

And make sure you have initiated the SelectedItems.

this.SelectedCommands = new ObservableCollection<Command>();

回答3:

The SearchText property of the RadAutoCompleteBox should provide you the value.

According to the documentation it gets or sets the string that is into the TextBox part of the RadAutoCompleteBox. The SearchText value is used to filter the RadAutoCompleteBox' ItemsSource.

If you want to get the "Text" of the selected item of the AutocompleteBox, then you need to cast it to the specified type. In your case it is of type ServerCrafterTelerikWPF.Command.

var selectedItem = autoCompleteBox.SelectedItem;

if (selectedItem is ServerCrafterTelerikWPF.Command) {
  var selectedCommand = selectedItem as ServerCrafterTelerikWPF.Command;

  string textOfAutoCompleteBox = selectedCommand.ACommand;
}

来源：https://stackoverflow.com/questions/15894646/get-text-of-radautocompletebox

标签

wpf

xaml

telerik

rad-controls