我遇到了一个问题,需要设置以下XAML布局:
RowHeightAuto.xaml
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="GridMaxHeight.RowHeightAuto"
Title="RowHeightAuto" WindowState="Maximized">
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="Auto" MaxHeight="200" />
</Grid.RowDefinitions>
<StackPanel Background="LightGray" Grid.Row="0"></StackPanel>
<DataGrid Name="DataGrid1" Grid.Row="1" />
</Grid>
DataGrid1控件在定义了许多列和行后没有显示任何滚动条。当我将Height="Auto"替换为Height="*"时,一切正常,水平和垂直滚动条就像预期的那样出现了。
如果我在DataGrid1中直接声明MaxHeight,它也能正常工作,但这并不是我真正想要的。
是子控件在设置Height="Auto"时忽略了maxheight的一个bug,还是我可能做错了什么?ListBox/ListView等也可以重现相同的行为,第三方控件如ComponentOne、Telerik也是如此。
如果这是一个bug - 你知道解决方法或者其他提示吗?
这里是我如何设置DataGrid的ItemsSource的代码。RowHeightAuto.xaml.cs
public partial class RowHeightAuto : Window
{
private readonly DateTime _start;
public RowHeightAuto()
{
InitializeComponent();
DataGrid1.ItemsSource = GetTestData();
_start = DateTime.Now;
Dispatcher.BeginInvoke(new Action(() => MessageBox.Show((DateTime.Now - _start).TotalSeconds.ToString(CultureInfo.InvariantCulture))), DispatcherPriority.ContextIdle, null);
}
public static List<TestData> GetTestData()
{
const int maxCols = 501;
const int maxRows = 300;
var testDatas = new List<TestData>(maxRows);
for (int i = 0; i < maxRows; i++)
testDatas.Add(new TestData());
for (int i = 0; i < maxCols; i++)
{
string propName = string.Format("Property{0}", AddLeadingZeros(i));
for (int j = 0; j < maxRows; j++)
testDatas[j][propName] = propName;
}
return testDatas;
}
private static string AddLeadingZeros(int val)
{
return val.ToString(CultureInfo.InvariantCulture).PadLeft(3, '0');
}
}
public class TestData
{
public object this[string propertyName]
{
get
{
var myType = GetType();
var myPropInfo = myType.GetProperty(propertyName);
return myPropInfo.GetValue(this);
}
set
{
var myType = GetType();
var myPropInfo = myType.GetProperty(propertyName);
myPropInfo.SetValue(this, value, null);
}
}
public string Property000 { get; set; }
public string Property001 { get; set; }
public string Property002 { get; set; }
public string Property003 { get; set; }
...
public string Property498 { get; set; }
public string Property499 { get; set; }
public string Property500 { get; set; }
}
string.Format("Property{0:000}", i)
而不是调用您的AddLeadingZeros
方法。 - Clemens