本文介绍了从文本框中过滤 wpf 数据网格值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个文本框和一个 Datagrid.数据网格有两列名称和电子邮件地址.我想用文本框中的值过滤数据网格值.
I have a textbox and a Datagrid. The datagrid has two columns name and Email address. I want to Filter the datagrid values with the value in the textbox.
推荐答案
你可以为 DataGrid
ItemSource
使用一个 ICollectionView
然后你就可以应用 Filter
谓词并在需要时刷新列表.
You can use a ICollectionView
for the DataGrid
ItemSource
then you can apply a Filter
predicate and refesh the list when needed.
这是一个非常简单的例子.
Here is a very quick example.
XML:
<Window x:Class="WpfApplication10.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="188" Width="288" Name="UI" >
<StackPanel DataContext="{Binding ElementName=UI}">
<TextBox Text="{Binding FilterString, UpdateSourceTrigger=PropertyChanged}" />
<DataGrid ItemsSource="{Binding DataGridCollection}" />
</StackPanel>
</Window>
代码:
namespace WpfApplication10
{
public partial class MainWindow : Window, INotifyPropertyChanged
{
private ICollectionView _dataGridCollection;
private string _filterString;
public MainWindow()
{
InitializeComponent();
DataGridCollection = CollectionViewSource.GetDefaultView(TestData);
DataGridCollection.Filter = new Predicate<object>(Filter);
}
public ICollectionView DataGridCollection
{
get { return _dataGridCollection; }
set { _dataGridCollection = value; NotifyPropertyChanged("DataGridCollection"); }
}
public string FilterString
{
get { return _filterString; }
set
{
_filterString = value;
NotifyPropertyChanged("FilterString");
FilterCollection();
}
}
private void FilterCollection()
{
if (_dataGridCollection != null)
{
_dataGridCollection.Refresh();
}
}
public bool Filter(object obj)
{
var data = obj as TestClass;
if (data != null)
{
if (!string.IsNullOrEmpty(_filterString))
{
return data.Name.Contains(_filterString) || data.Email.Contains(_filterString);
}
return true;
}
return false;
}
public IEnumerable<TestClass> TestData
{
get
{
yield return new TestClass { Name = "1", Email = "[email protected]" };
yield return new TestClass { Name = "2", Email = "[email protected]" };
yield return new TestClass { Name = "3", Email = "[email protected]" };
yield return new TestClass { Name = "4", Email = "[email protected]" };
yield return new TestClass { Name = "5", Email = "[email protected]" };
yield return new TestClass { Name = "6", Email = "[email protected]" };
yield return new TestClass { Name = "7", Email = "[email protected]" };
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
}
public class TestClass
{
public string Name { get; set; }
public string Email { get; set; }
}
}
结果:
这篇关于从文本框中过滤 wpf 数据网格值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!