我有一个使用AutoGenerateColumns = True绑定到DataTable的WPF 4.0 DataGrid。列是动态的,但我知道总会有一个名为ID的列,我想隐藏这一列。有没有办法可以做到这一点?
答案 0 :(得分:34)
在您的数据网格中订阅AutoGeneratingColumn
事件,事件args
(DataGridAutoGeneratingColumnEventArgs
)具有列名称和“Cancel
”,如果列名称为然后设置ID Cancel = true
。应该做的。
答案 1 :(得分:9)
您可以使用行为(可重复使用的代码)来完成这项工作......这样您就可以使用将列可见性集中在一个地方的属性。
用法:
<Window
...
xmlns:extension="clr-namespace:WpfControlLibrary.Extension;assembly=WpfControlLibrary">
<DataGrid ...
extension:DataGridBehavior.UseBrowsableAttributeOnColumn="True">
...
public class YourObjectItem
{
[Browsable(false)]
public Assembly Assembly { get; set; }
代码:
using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
namespace HQ.Wpf.Util.Behaviors
{
/// <summary>
/// Using this behavior on a dataGRid will ensure to display only columns with "Browsable Attributes"
/// </summary>
public static class DataGridBehavior
{
public static readonly DependencyProperty UseBrowsableAttributeOnColumnProperty =
DependencyProperty.RegisterAttached("UseBrowsableAttributeOnColumn",
typeof(bool),
typeof(DataGridBehavior),
new UIPropertyMetadata(false, UseBrowsableAttributeOnColumnChanged));
public static bool GetUseBrowsableAttributeOnColumn(DependencyObject obj)
{
return (bool)obj.GetValue(UseBrowsableAttributeOnColumnProperty);
}
public static void SetUseBrowsableAttributeOnColumn(DependencyObject obj, bool val)
{
obj.SetValue(UseBrowsableAttributeOnColumnProperty, val);
}
private static void UseBrowsableAttributeOnColumnChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
var dataGrid = obj as DataGrid;
if (dataGrid != null)
{
if ((bool)e.NewValue)
{
dataGrid.AutoGeneratingColumn += DataGridOnAutoGeneratingColumn;
}
else
{
dataGrid.AutoGeneratingColumn -= DataGridOnAutoGeneratingColumn;
}
}
}
private static void DataGridOnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
var propDesc = e.PropertyDescriptor as PropertyDescriptor;
if (propDesc != null)
{
foreach (Attribute att in propDesc.Attributes)
{
var browsableAttribute = att as BrowsableAttribute;
if (browsableAttribute != null)
{
if (!browsableAttribute.Browsable)
{
e.Cancel = true;
}
}
// As proposed by "dba" stackoverflow user on webpage:
// https://stackoverflow.com/questions/4000132/is-there-a-way-to-hide-a-specific-column-in-a-datagrid-when-autogeneratecolumns
// I added few next lines:
var displayName = att as DisplayNameAttribute;
if (displayName != null)
{
e.Column.Header = displayName.DisplayName;
}
}
}
}
}
}
答案 2 :(得分:4)
其他可能性为Visibility.Collapsed
:
private void dataGrid_AutoGeneratingColumn(object sender,
DataGridAutoGeneratingColumnEventArgs e)
{
//Set properties on the columns during auto-generation
switch (e.Column.Header.ToString())
{
case "rownameYouWantToHide":
e.Column.Visibility = Visibility.Collapsed;
break;
}
}
答案 3 :(得分:1)
我不能说4,但是在3.5 SP1中是不可能的,至少没有注册我想不惜一切代价避免的事件。
您可以做的是将生成代码更改为AutoGenerateColumns=False
,然后将您关注的列放在XAML中,因为基础数据仍将完全放在列中
<dg:DataGridTextColumn Header="Display" Binding="{Binding DisplayName}"/>
<dg:DataGridTextColumn Header="Host" Binding="{Binding HostName}"/>
<dg:DataGridTextColumn Header="Database" Binding="{Binding Database}"/>
<dg:DataGridTextColumn Header="Username" Binding="{Binding Username}"/>
<dg:DataGridTextColumn Header="Password" Binding="{Binding Password}"/>
这将允许您显示与基础模型相关的唯一列,并根据需要更改Header
以显示,因此您不依赖于Property
模型上的名称。
答案 4 :(得分:0)
我不会说这是一个很好的解决方案......但是......你可以再拥有一个抽象层 例如,假设你有一个像这样的对象:
public class Foo
{
public string Id { get; set; }
public string Property2 { get; set; }
public string Property3 { set; get; }
}
您不希望ID为列,因此您需要创建新对象
public class Foo2
{
public string Property2 { get; set; }
public string Property3 { set; get; }
}
然后将Foo映射/转换为Foo2,你就完成了。
另一种可能的方式(并非总是可能)是将访问修饰符更改为内部
public class Foo
{
internal string Id { get; set; }
public string Property2 { get; set; }
public string Property3 { set; get; }
}
这样您就不会生成Id列。
答案 5 :(得分:0)
我最近做到了这一点,并希望分享我的解决方案:
我刚刚创建了一个视图模型,我希望数据网格遵循该模型,对于希望其忽略的字段(即,不为其自动生成列),只需将这些字段设置为私有即可。像魅力一样工作,不需要不必要的代码。
例如,这是我传递给包含数据网格的视图的视图模型。我只需将我不想将的字段设置为私有列即可获得所需的一切,这些示例显示在示例中的“ FullPath”字段中。我知道这可能并非在每种情况下都可行,但对我来说很好。
namespace dev
{
/// <summary>
/// View model for tag list view in data grid
/// </summary>
public class TagDataViewModel : BaseViewModel
{
/// <summary>
/// Default constructor
/// </summary>
/// <param name="path">The JSONPath to this item</param>
public TagDataViewModel(string path)
{
FullPath = path;
}
/// <summary>
/// Gets and sets the JSONPath to this item
/// </summary>
private string FullPath { get; set; }
/// <summary>
/// Gets the name
/// </summary>
public string Name => ProjectHelpers.GetPropertyValue(FullPath, "Name");
/// <summary>
/// Gets the address
/// </summary>
public string Address => ProjectHelpers.GetPropertyValue(FullPath, "Address");
/// <summary>
/// Gets the data type
/// </summary>
public string DataType => ProjectHelpers.GetPropertyValue(FullPath, "DataType");
/// <summary>
/// Gets the scan rate
/// </summary>
public string ScanRate => ProjectHelpers.GetPropertyValue(FullPath, "ScanRate");
/// <summary>
/// Gets the scaling type
/// </summary>
public string ScalingType => ProjectHelpers.GetPropertyValue(FullPath, "ScalingType");
}
}
答案 6 :(得分:0)
我使用Browsable
属性和Visibility: Collapsed
型号
class CourseModel
{
[Description("")]
[ReadOnly(false)]
public bool Select { get; set; } = true; // Checkbox
[Description("Course ID")]
[ReadOnly(true)]
[Browsable(false)]
public string ID { get; set; } // Hidden column
[Description("Course Title")]
[ReadOnly(true)]
public string Title { get; set; }
}
自定义控件扩展名:
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
namespace MyProject.FrontEnd.Controls
{
class CustomDataGrid : DataGrid
{
// Take attributes of POCO, if available (https://stackoverflow.com/a/17255496/979621)
protected override void OnAutoGeneratingColumn(DataGridAutoGeneratingColumnEventArgs e)
{
try
{
base.OnAutoGeneratingColumn(e);
var propertyDescriptor = e.PropertyDescriptor as PropertyDescriptor;
e.Column.Header = propertyDescriptor.Description;
e.Column.IsReadOnly = propertyDescriptor.IsReadOnly;
e.Column.Visibility = propertyDescriptor.IsBrowsable
? Visibility.Visible
: Visibility.Collapsed;
}
catch
{
// ignore; retain field defaults
}
}
}
}
ViewModel
public ObservableCollection<CourseModel> Courses { get; set; }
XAML
<Window
...
xmlns:controls="clr-namespace:MyProject.FrontEnd.Controls"
...
>
...
<controls:CustomDataGrid x:Name="courses"
ItemsSource="{Binding Path=Courses, Mode=TwoWay,
NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" />