wpf如何绑定到List

Question

i'm trying to bound a list of object to DataGrid but i'm getting wrong value: the object class:

public class Attribute
{
    public Attribute()
    {

    }

    private string _name;

    public string name
    {
        get { return _name; }
        set { _name = value; }
    }



    private List<Value> _valueList = new List<Value>();

    public List<Value> ValueList
    {
        get { return _valueList; }
        set { _valueList = value; }
    }
}

public class Value
{

    private string _value;

    public string value
    {
        get { return _value; }
        set { _value = value; }
    }

    public override string ToString()
    {
        return _value.ToString();
    }
}

and i'm having a list of objects: List<Attribute> attributes

attributeDataGrid.ItemsSource = attributes;

when i bound i get a grid with name column correct but the "ValueList" shown as "(Collection)" instead of the string...

how should i bound the List?

Answer 1

Your overriden ToString method in Value is not called, because WPF displays the content of ValueList in your second column, ie it displays ValueList.ToString() . What do you expect to see in the second column? A comma separated list of the values in the ValueList ?

Answer 2

Try below things it works for me.

On Load Method write below code

Attribute atr = new Attribute();
atr.ValueList.Add(new Value() { value = "One" });
atr.ValueList.Add(new Value() { value = "Two" });
atr.ValueList.Add(new Value() { value = "Three" });
atr.ValueList.Add(new Value() { value = "Four" });
dataGrid.DataContext = atr.ValueList;

On XAML file try below

    <DataGrid x:Name="dataGrid" AutoGenerateColumns="False" ItemsSource="{Binding}" >
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding value}" />
        </DataGrid.Columns>
    </DataGrid>

Hope this code snippet helps to you.