GridViewColumn宽度调整

Question

我的UI:

<ListView Name="persons" SelectionChanged="persons_SelectionChanged">
        <ListView.View>
            <GridView AllowsColumnReorder="False">
                <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}" Width="auto"/>
                <GridViewColumn Header="Age" DisplayMemberBinding="{Binding Age}" Width="auto"/>
            </GridView>
        </ListView.View>
    </ListView>

我的UI的Codebehind:

internal void Update(IEnumerable<Person> pers)
    {
        this.persons.ItemsSource = null;
        this.persons.ItemsSource = pers;
        UpdateLayout();
    }

我的实体:

class Person
{
   public string Name { get; set; }
   public int Age { get; set; }
}

GridViewColumns具有GridViewColumn-Header的宽度.即使我使用长名称的人调用Update().列不会调整大小.

a)如何自动调整"名称"列(当我调用更新时)到最长名称的长度,但不长于值x(我想指定列的最大宽度)？

b)如何指定"Age"-Column将空间填充到控件的末尾(以便gridview的列使用控件的完整宽度)？

Answer 1

GridView不会自动调整大小.

要调整列的大小,您可以

    foreach (GridViewColumn c in gv.Columns)
    {
        // Code below was found in GridViewColumnHeader.OnGripperDoubleClicked() event handler (using Reflector)
        // i.e. it is the same code that is executed when the gripper is double clicked
        // if (adjustAllColumns || App.StaticGabeLib.FieldDefsGrid[colNum].DispGrid)
        if (double.IsNaN(c.Width))
        {
            c.Width = c.ActualWidth;
        }
        c.Width = double.NaN;
     }  

至于确定最后填充区域的大小,我使用转换器.我不认为这个转换器完全符合您的需要,但它应该让您开始.

    <GridViewColumn Width="{Binding ElementName=lvCurDocFields, Path=ActualWidth, Converter={StaticResource widthConverter}, ConverterParameter=100}">


    [ValueConversion(typeof(double), typeof(double))]
    public class WidthConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            // value is the total width available
            double otherWidth;
            try
            {
                otherWidth = System.Convert.ToDouble(parameter);
            }
            catch
            {
                otherWidth = 100;
            }
            if (otherWidth < 0) otherWidth = 0;

            double width = (double)value - otherWidth;
            if (width < 0) width = 0;
            return width; // columnsCount;

        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

GridView很快但需要一点宝宝坐着.