C＃WPF多个字典到DataGrid

Question

I have multiple dictionaries. Each of them contains the same keys, just with different values. I am using them for translations. They are dynamically created..

So, it looks something like this:

DictionaryEng: first_page_name = "First page" second_page_name = "Second page"

DictionaryRu: first_page_name = "Первая страница" second_page_name = "Вторая страница"

I would like this informations to be shown in DataGrid or, so user can change the values. It should look like this , end values to be editable.

What's the best practice to do this?

Answer 1

Basically you need to bind the DataGrid to a Collection

    <DataGrid 
        ItemsSource="{Binding Lines}" AutoGenerateColumns="True"

I'll mock up the creation of the dictionary with stub functions called in the ViewModel c.tor

public class MyVM : ViewModelBase
{
    public MyVM()
    {
        Line.DictionaryEng = Line.DictionaryEngStub();
        Line.DictionaryRu = Line.DictionaryRuStub();
        lines = new ObservableCollection<Line>(Line.DictionaryEng.Keys.Select(k => new Line() { KeyWord = k }));
    }
    private ObservableCollection<Line> lines;
    public ObservableCollection<Line> Lines
    {
        get { return lines;  }
        set
        {
            lines = value;
            OnPropertyChanged("Lines");
        }
    }
}

where the underlying class is defined as follows

public class Line : ViewModelBase
{
    internal static Dictionary<string, string> DictionaryEngStub()
    {
        return new Dictionary<string, string>()
        {
            { "first_page_name ","First page" },
            { "second_page_name  ","Second page" }
        };
    }
    internal static Dictionary<string, string> DictionaryRuStub()
    {
        return new Dictionary<string, string>()
        {
            {"first_page_name ","Первая страница" },
            {"second_page_name  ","Вторая страница" }
        };
    }
    internal static Dictionary<string, string> DictionaryEng = new Dictionary<string, string>();
    internal static Dictionary<string, string> DictionaryRu = new Dictionary<string, string>();
    private string keyWord; 
    public string KeyWord
    {
        get { return keyWord;  }
        set
        {
            keyWord = value;
            OnPropertyChanged("keyWord");
        }
    }
    public string EnglishWord {
       get
        {
            string english;
            if (DictionaryEng.TryGetValue(keyWord ?? "", out english))
            {
                return english;
            }
            return null;
        }
    }
    public string RussianhWord
    {
        get
        {
            string russian;
            if (DictionaryRu.TryGetValue(keyWord ?? "", out russian))
            {
                return russian;
            }
            return null;
        }
    }
}

Notice that the translations have only a getter to retrieve the string from the dictionary. You can easily make them editable by adding a setter to save the new translation into a persistence layer. Furthermore, English and Russian dictionaries are generic enough to be renamed as from/to dictionaries. Once the user selects a language in another combobox, you can reset the dictionary accordingly. Since I have a stub here, the setter does not make much sense, but just to give you and idea...

    private string englishSaved;
    public string EnglishWord {
       get
        {
            if (englishSaved != null)
            {
                return englishSaved;
            }
            string english;
            if (DictionaryEng.TryGetValue(keyWord ?? "", out english))
            {
                return english;
            }
            return null;
        }
        set
        {
            englishSaved = value; //save the new translation into a persistence layer
        }
    }