C# 按多个标准筛选WPF数据网格

我想通过三列实现类似Excel的datagrid过滤器

这是我的密码：

    using System.Data.Odbc;
    using System.Windows;
    using System.Data;

    namespace DB_inspector
    {
        /// <summary>
        /// Interaction logic for MainWindow.xaml
        /// </summary>
        public partial class MainWindow : Window
        {
            public MainWindow()
            {
                InitializeComponent();

            }

            private void Button_Click(object sender, RoutedEventArgs e)
            {
                OdbcConnection dbConnection = new OdbcConnection("Driver={Pervasive ODBC Client Interface};ServerName=875;dbq=@DBFS;Uid=Username;Pwd=Password;");
                string strSql = "select NRO,NAME,NAMEA,NAMEB,ADDRESS,POSTA,POSTN,POSTADR,COMPANYN,COUNTRY,ID,ACTIVE from COMPANY";
                dbConnection.Open();
                OdbcDataAdapter dadapter = new OdbcDataAdapter();
                dadapter.SelectCommand = new OdbcCommand(strSql, dbConnection);
                DataTable table = new DataTable("COMPANY");
                dadapter.Fill(table);
                DataGrid1.DataContext = table;
                DataGrid1.ItemsSource = table.DefaultView;
                dadapter.Update(table);
                dbConnection.Close();
            }

        private void TextBox_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
        {
            DataView dv = DataGrid1.ItemsSource as DataView;

            string filter = NameSearch.Text;
                if (string.IsNullOrEmpty(filter))
                    dv.RowFilter = null;
                else
                    dv.RowFilter = string.Format("NAME Like '%{0}%'", filter);

        }

        private void TextBox_TextChanged_1(object sender, System.Windows.Controls.TextChangedEventArgs e)
        {
            DataView dv = DataGrid1.ItemsSource as DataView;

            string filter = ActiveSearch.Text;
            if (string.IsNullOrEmpty(filter))
                dv.RowFilter = null;
            else
                dv.RowFilter = string.Format("ACTIVE Like '%{0}%'", filter);
        }

        private void CustomerNumberSearch_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
        {
            DataView dv = DataGrid1.ItemsSource as DataView;

            string filter = CustomerNumberSearch.Text;
            if (string.IsNullOrEmpty(filter))
                dv.RowFilter = null;
            else
                dv.RowFilter = string.Format("NRO Like '%{0}%'", filter); //this should be "Begins with" not "Like"
        }
    }
}

使用System.Data.Odbc；
使用System.Windows；
使用系统数据；
名称空间数据库检查器
{
/// 
///MainWindow.xaml的交互逻辑
/// 
公共部分类主窗口：窗口
{
公共主窗口（）
{
初始化组件（）；
}
私有无效按钮\u单击（对象发送者，路由目标e）
{
OdbcConnection dbConnection=newodbcconnection（“驱动程序={普及ODBC客户端接口}；服务器名=875；dbq=@DBFS；Uid=用户名；Pwd=密码；”；
string strSql=“选择NRO、名称、名称A、名称B、地址、邮资、邮资N、邮资DR、公司YN、国家/地区、ID、公司活动”；
dbConnection.Open（）；
OdbcDataAdapter dadapter=新的OdbcDataAdapter（）；
dadapter.SelectCommand=newodbccommand（strSql，dbConnection）；
数据表=新数据表（“公司”）；
数据填充（表格）；
DataGrid1.DataContext=表；
DataGrid1.ItemsSource=table.DefaultView；
数据更新（表）；
dbConnection.Close（）；
}
私有无效文本框\u TextChanged（对象发送方，System.Windows.Controls.textchangedventargs e）
{
DataView dv=DataGrid1.ItemsSource作为DataView；
字符串过滤器=NameSearch.Text；
if（string.IsNullOrEmpty（筛选器））
dv.RowFilter=null；
其他的
dv.RowFilter=string.Format（“名称类似“{0}%”，filter）；
}
私有无效文本框\u TextChanged\u 1（对象发送者，System.Windows.Controls.textchangedventargs e）
{
DataView dv=DataGrid1.ItemsSource作为DataView；
字符串过滤器=ActiveSearch.Text；
if（string.IsNullOrEmpty（筛选器））
dv.RowFilter=null；
其他的
dv.RowFilter=string.Format（“像“{0}%”一样处于活动状态，筛选器）；
}
private void CustomerNumber搜索\ U文本已更改（对象发件人，System.Windows.Controls.TextChangedEventArgs e）
{
DataView dv=DataGrid1.ItemsSource作为DataView；
字符串过滤器=CustomerNumber搜索.Text；
if（string.IsNullOrEmpty（筛选器））
dv.RowFilter=null；
其他的
dv.RowFilter=string.Format（“类似NRO的“{0}%”，filter）；//这应该是“以”开头，而不是“类似”
}
}
}

XAML

我想为列

NRO

和

ACTIVE

实施过滤器，以便在加载列

NRO

中的数据时，数字仅以3开头，列

中的ACTIVE

值仅以1开头。在

ACTIVE

中，有值1和0（1为ACTIVE，0为notactive）

---

我当前的设置仅按一个条件进行筛选。如何使这三个标准都正确运行

您可以修改数据库查询，让数据库更高效地完成工作。
但是如果您仍然喜欢使用C#，那么可以使用LINQ来过滤

数据表

：

main window.xaml

<Window>
  <Window.DataContext>
    <ViewModel />
  </Window.DataContext>

  <DataGrid ItemsSource={Binding Data} />
</Window>

<Window x:Class="DB_inspector.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Liinos_inspector"
        mc:Ignorable="d"
        Title="DB database inspector" Height="595.404" Width="1005.571">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="11*"/>
            <RowDefinition Height="553*"/>
        </Grid.RowDefinitions>

        <DataGrid x:Name="DataGrid1" Margin="0,51,0,0" Grid.Row="1"
                  ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type MainWindow}}, Path=FilteredData}" />

        <Image Height="41" Margin="847,10,10,502" Width="141" Source="Logo_small.jpg" Grid.Row="1" HorizontalAlignment="Right" VerticalAlignment="Top"/>

        <TextBox x:Name="NameSearch" HorizontalAlignment="Left" Height="23" Margin="77,14,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="409" Grid.Row="1" 
                 TextChanged="OnNameSearchTextBox_TextChanged"/>
        <Button Content="Refrsh" HorizontalAlignment="Left" Height="23" Margin="736,14,0,0" VerticalAlignment="Top" Width="72" Click="Button_Click" Grid.Row="1" Background="#FF51C951" BorderBrush="{x:Null}" Foreground="White"/>
        <CheckBox x:Name="ActiveSearch" HorizontalAlignment="Left" Height="23" Margin="502,14,0,0" Grid.Row="1" VerticalAlignment="Top" Width="66" 
                  IsChecked="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type MainWindow}}, Path=IsActiveFilterValue}" />
        <TextBox x:Name="CustomerNumberSearch" HorizontalAlignment="Left" Height="23" Margin="580,14,0,0" Grid.Row="1" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="82" 
                 TextChanged="OnCustomerNumberSearch_TextChanged"/>

        <ProgressBar x:Name="ProgressBar" HorizontalAlignment="Left" Height="10" Margin="0,1,0,0" VerticalAlignment="Top" Width="998" BorderBrush="{x:Null}" Background="{x:Null}"/>
        <Button Content="Button" HorizontalAlignment="Left" Height="23" Margin="680,14,0,0" Grid.Row="1" VerticalAlignment="Top" Width="51" Click="Button_Click_1"/>

    </Grid>
</Window>

---

更新 这是基于您发布的代码的解决方案。我将

文本框

替换为使用

复选框

过滤

活动

列，以添加一些类型安全性（防止无效输入，例如，按字母顺序）。我还使用数据绑定将

DataGrid

连接到

DataTable

。您应该更喜欢在代码隐藏上使用数据绑定，并尽可能多地在XAML中实现：

main window.xaml

<Window>
  <Window.DataContext>
    <ViewModel />
  </Window.DataContext>

  <DataGrid ItemsSource={Binding Data} />
</Window>

<Window x:Class="DB_inspector.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Liinos_inspector"
        mc:Ignorable="d"
        Title="DB database inspector" Height="595.404" Width="1005.571">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="11*"/>
            <RowDefinition Height="553*"/>
        </Grid.RowDefinitions>

        <DataGrid x:Name="DataGrid1" Margin="0,51,0,0" Grid.Row="1"
                  ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type MainWindow}}, Path=FilteredData}" />

        <Image Height="41" Margin="847,10,10,502" Width="141" Source="Logo_small.jpg" Grid.Row="1" HorizontalAlignment="Right" VerticalAlignment="Top"/>

        <TextBox x:Name="NameSearch" HorizontalAlignment="Left" Height="23" Margin="77,14,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="409" Grid.Row="1" 
                 TextChanged="OnNameSearchTextBox_TextChanged"/>
        <Button Content="Refrsh" HorizontalAlignment="Left" Height="23" Margin="736,14,0,0" VerticalAlignment="Top" Width="72" Click="Button_Click" Grid.Row="1" Background="#FF51C951" BorderBrush="{x:Null}" Foreground="White"/>
        <CheckBox x:Name="ActiveSearch" HorizontalAlignment="Left" Height="23" Margin="502,14,0,0" Grid.Row="1" VerticalAlignment="Top" Width="66" 
                  IsChecked="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type MainWindow}}, Path=IsActiveFilterValue}" />
        <TextBox x:Name="CustomerNumberSearch" HorizontalAlignment="Left" Height="23" Margin="580,14,0,0" Grid.Row="1" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="82" 
                 TextChanged="OnCustomerNumberSearch_TextChanged"/>

        <ProgressBar x:Name="ProgressBar" HorizontalAlignment="Left" Height="10" Margin="0,1,0,0" VerticalAlignment="Top" Width="998" BorderBrush="{x:Null}" Background="{x:Null}"/>
        <Button Content="Button" HorizontalAlignment="Left" Height="23" Margin="680,14,0,0" Grid.Row="1" VerticalAlignment="Top" Width="51" Click="Button_Click_1"/>

    </Grid>
</Window>

MainWindow.xaml.cs

public class ViewModel
{
  public DataTable Data { get; set; }

  public ViewModel()
  {
    this.Data = new DataTable();
  }

  // Button ICommand handler
  private void ExecuteGetDataCommand(object param)
  {
    DataTable dataTable = QueryDatabase(); 

    // Filter DataTable using LINQ
    this.Data = dataTable
      .AsEnumerable()
      .Where(row => row["NRO"].ToString().StartsWith("3")
        && row["ACTIVE"].ToString().StartsWith("1"))
      .CopyToDataTable();
  }

  private DataTable QueryDatabase()
  {
    OdbcConnection dbConnection = new OdbcConnection("Driver={Pervasive ODBC Client Interface};ServerName=875;dbq=@DBFS;Uid=Username;Pwd=Password;");
    string strSql = "select NRO,NAME,NAMEA,NAMEB,ADDRESS,POSTA,POSTN,POSTADR,COMPANYN,COUNTRY,ID,ACTIVE from COMPANY";
    dbConnection.Open();
    OdbcDataAdapter dadapter = new OdbcDataAdapter();
    dadapter.SelectCommand = new OdbcCommand(strSql, dbConnection);
    DataTable table = new DataTable("COMPANY");
    dadapter.Fill(table);
    return table;
  }
}

public partial class MainWindow : Window
{
  public static readonly DependencyProperty FilteredDataProperty = DependencyProperty.Register(
    "FilteredData", 
    typeof(DataTable),
    typeof(MainWindow));

  public DataTable FilteredData 
  {
    get { return (DataTable)GetValue(FilteredDataProperty); }
    set { SetValue(FilteredDataProperty, value); }
  }

  public static readonly DependencyProperty IsActiveFilterValueProperty = DependencyProperty.Register(
    "IsActiveFilterValue", 
    typeof(bool),
    typeof(MainWindow), 
    new PropertyMetadata(false, OnIsActiveFilterValueChanged));

  public bool IsActiveFilterValue
  {
    get { return (bool)GetValue(IsActiveFilterValueProperty); }
    set { SetValue(IsActiveFilterValueProperty, value); }
  }

  private DataTable UnfilteredData { get; set; }
  private String NameFilterValue { get; set; }
  private int CustomerNumberFilterValue { get; set; }


  public MainWindow()
  {
    InitializeComponent();
  }

  private void Button_Click(object sender, RoutedEventArgs e)
  {
    string connectionString = "Driver={Pervasive ODBC Client Interface};ServerName=875;dbq=@DBFS;Uid=Username;Pwd=Password;";

    string queryString = "select NRO,NAME,NAMEA,NAMEB,ADDRESS,POSTA,POSTN,POSTADR,COMPANYN,COUNTRY,ID,ACTIVE from COMPANY";

    // using-statement will cleanly close and dispose unmanaged resources i.e. IDisposable instances
    using (OdbcConnection dbConnection = new OdbcConnection(connectionString))
    {    
      dbConnection.Open();
      OdbcDataAdapter dadapter = new OdbcDataAdapter();
      dadapter.SelectCommand = new OdbcCommand(queryString, dbConnection);

      this.UnfilteredData = new DataTable("COMPANY");
      dadapter.Fill(this.UnfilteredData);
      this.FilteredData = this.UnfilteredData;
    }
  }

  private void ApplyFilterOnDataTable()
  {
    // Filter DataTable using LINQ
    this.FilteredData = this.UnfilteredData
      .AsEnumerable()
      .Where(row => 
        string.IsNullOrWhiteSpace(this.NameFilterValue) 
          ? true // Filter criteria is ignored, when input is empty or null
          : row["NAME"].StartsWith(this.NameFilterValue)   
        && this.CustomerNumberFilterValue < 0 
          ? true // Filter criteria is ignored, when value is < 0
          : row["NRO"].ToString().StartsWith(this.CustomerNumberFilterValue.ToString())
        && this.IsActiveFilterValue 
          ? row["ACTIVE"].ToString().Equals("1")
          : true) // Filter criteris is ignored, when CheckBox is unchecked
      .CopyToDataTable();        
  }  

  private void OnNameSearchTextBox_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
  {       
    this.NameFilterValue = NameSearch.Text;
    ApplyFilterOnDataTable();  
  }

  private static void OnIsActiveFilterValueChanged(DependencyObject d, 
    DependencyPropertyChangedEventArgs e)
  {
    var _this = d as MainWindow;   
    _this.ApplyFilterOnDataTable();            
  }

  private void OnCustomerNumberSearch_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
  {  
    // Check if input is numeric 
    this.CustomerNumberFilterValue = Int32.TryParse(CustomerNumberSearch.Text, out int number) 
      ? number
      : -1; // Parsing failed -> not a numeric value. -1 will disable this filter criteria
    ApplyFilterOnDataTable();   
  }
}

公共部分类主窗口：窗口
{
public static readonly dependencProperty filteredataProperty=dependencProperty.Register(
“过滤数据”，
类型（数据表），
类型（主窗口）；
公共数据表筛选器数据
{
get{return（DataTable）GetValue（FilteredDataProperty）；}
集合{SetValue（FilteredDataProperty，value）；}
}
公共静态只读DependencyProperty IsActivieFilterValueProperty=DependencyProperty.Register(
“IsActivifilterValue”，
类型（bool），
类型（主窗口），
新的PropertyMetadata（false，OnIsActiveFilterValueChanged））；
公共布尔IsActiveFilterValue
{
获取{return（bool）GetValue（IsActiveFilterValueProperty）；}
set{SetValue（isActivifilterValueProperty，value）；}
}
私有数据表未筛选数据{get；set；}
私有字符串NameFilterValue{get；set；}
private int CustomerNumberFilterValue{get；set；}
公共主窗口（）
{
初始化组件（）；
}
私有无效按钮\u单击（对象发送者，路由目标e）
{
string connectionString=“Driver={普及ODBC客户端接口}；ServerName=875；dbq=@DBFS；Uid=Username；Pwd=Password；”；
string queryString=“选择NRO、名称、名称A、名称B、地址、邮资、邮资N、邮资DR、公司YN、国家/地区、ID、公司活动”；
//语句将干净地关闭和处置非托管资源，即IDisposable实例
正在使用（OdbcConnection dbConnection=新OdbcConnection（connectionString））
{    
dbConnection.Open（）；
OdbcDataAdapter dadapter=新的OdbcDataAdapter（）；
dadapter.SelectCommand=新的OdbcCommand（queryString、dbConnection）；
this.UnfilteredData=新数据表（“公司”）；
dadapter.Fill（此为未过滤数据）；
this.FilteredData=this.UnfilteredData；
}
}
私有void ApplyFilterOnDataTable（）
{
//筛选数据选项卡