一直對get,set的理解只在文字上:get?屬性訪問器用于返回屬性值，而?set?訪問器用于分配新值.其實這樣理解是有點(diǎn)狹隘的，尤其是對set。set應(yīng)該可以理解為為成員分配新值時的處理，比如一個類成員Name,對Name賦值時可以同時處理與Name業(yè)務(wù)上有關(guān)的操作。下面一個工作用到的例子（wpf程序）：選中一條記錄，點(diǎn)擊"修改"打開對應(yīng)頁面，代碼界面如下：

先上界面圖：第一個界面顯示詳細(xì)，第二個界面是點(diǎn)擊增加按鈕或選中一條數(shù)據(jù)點(diǎn)擊修改按鈕時彈出界面

第二個界面（彈出界面）

具體代碼實現(xiàn)如下：

//第一個界面xaml頁面： <Window x:Class="WPF_Study.WindowSet"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="WindowSet" Height="300" Width="540" Background="LightBlue"><Grid><Grid.Resources><Style TargetType="{x:Type Button}"><Setter Property="Width" Value="60"/><Setter Property="Height" Value="30"/><Setter Property="Margin" Value="5"/></Style></Grid.Resources><Grid.RowDefinitions><RowDefinition Height="40*"/><RowDefinition Height="221*"/></Grid.RowDefinitions><WrapPanel Grid.Row="0" Grid.Column="0"><Button Content="查詢" x:Name="btnSearch"></Button><Button Content="新增" x:Name="btnAdd"></Button><Button Content="修改" x:Name="btnAmend"></Button><Button Content="刪除" x:Name="btnDelete"></Button></WrapPanel><DataGrid x:Name="dataGrid" AutoGenerateColumns="False" Grid.Row="2" Grid.Column="0" CanUserAddRows="False"><DataGrid.Columns><DataGridTextColumn Header="窗口編號" Binding="{Binding Win}"/><DataGridTextColumn Header="評價器地址" Binding="{Binding Evalutor}"/><DataGridTextColumn Header="條屏地址" Binding="{Binding StripeScreen}"/><DataGridTextColumn Header="IP" Binding="{Binding IP}"/><DataGridTextColumn Header="注冊設(shè)備號" Binding="{Binding RegNum}"/><DataGridTextColumn Header="描述" Binding="{Binding Description}" ?Width="*"/></DataGrid.Columns></DataGrid></Grid> </Window> //對應(yīng)的后臺代碼： using System; using System.Windows; using System.Windows.Controls; using System.Collections.ObjectModel; using WPF_Study.Entity;namespace WPF_Study {/// <summary>/// Interaction logic for WindowSet.xaml/// </summary>public partial class WindowSet : Window{internal ObservableCollection<QueueClient.Counter> Windows { get; set; }//修改的行號標(biāo)識private int flag;public WindowSet(){InitializeComponent();Windows = new ObservableCollection<QueueClient.Counter>();this.btnAdd.Click += Button_Click;this.btnAmend.Click += Button_Click;this.btnDelete.Click += Button_Click;this.btnSearch.Click += Button_Click;//測試手動造數(shù)據(jù)for (int i = 0; i < 5; i++){QueueClient.Counter c = new QueueClient.Counter(){Win=i.ToString(),Description = "Description"+i.ToString(),Evalutor=i,StripeScreen=i,IP="172.100.12.0"+i.ToString(),RegNum="1725"+i.ToString()};Windows.Add(c);}if (this.Windows.Count > 0){this.dataGrid.ItemsSource = Windows;}}void Button_Click(object sender, RoutedEventArgs e){Button button = e.OriginalSource as Button;if(button.Equals(this.btnAdd)){WindowUpdate win = new WindowUpdate();flag = -1;win.Closed += win_Closed;win.ShowDialog();}if(button.Equals(this.btnDelete)){QueueClient.Counter c=this.dataGrid.SelectedItem as QueueClient.Counter;this.Windows.Remove(c);}if(button.Equals(this.btnAmend)){QueueClient.Counter c = this.dataGrid.SelectedItem as QueueClient.Counter;flag = Windows.IndexOf(c);WindowUpdate win = new WindowUpdate(c.Win);win.Evaluator = c.Evalutor;win.StripeScreen = c.StripeScreen;win.IP = c.IP;win.RegNum = c.RegNum;win.Description = c.Description;win.Closed += win_Closed;win.ShowDialog();}}private void win_Closed(object sender, EventArgs e){}} } //增加修改界面（共用同一個界面程序） xaml界面代碼： <Window x:Class="WPF_Study.WindowUpdate"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="WindowUpdate" Height="300" Width="540" Background="LightBlue"><Grid><Grid.Resources><Style TargetType="{x:Type Label}"><Setter Property="HorizontalAlignment" Value="Right"></Setter></Style><Style TargetType="{x:Type TextBox}"><Setter Property="Width" Value="160"></Setter><Setter Property="Height" Value="25" ></Setter><Setter Property="HorizontalAlignment" Value="Left"></Setter></Style><Style TargetType="{x:Type Button}"><Setter Property="Width" Value="60"></Setter><Setter Property="Height" Value="25" ></Setter><Setter Property="HorizontalAlignment" Value="Left"></Setter></Style></Grid.Resources><Grid.RowDefinitions><RowDefinition Height="10*"/><RowDefinition Height="35*"/><RowDefinition Height="10*"/><RowDefinition Height="35*"/><RowDefinition Height="10*"/><RowDefinition Height="35*"/><RowDefinition Height="10*"/><RowDefinition Height="35*"/><RowDefinition Height="10*"/><RowDefinition Height="35*"/><RowDefinition Height="10*"/><RowDefinition Height="35*"/><RowDefinition Height="10*"/><RowDefinition Height="35*"/><RowDefinition Height="10*"/></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition Width="100*" /><ColumnDefinition Width="105*" /><ColumnDefinition Width="246*" /><ColumnDefinition Width="100*" /></Grid.ColumnDefinitions><Label Content="窗體編號：" Grid.Row="1" Grid.Column="1"></Label><Label Content="評價器地址：" Grid.Row="3" Grid.Column="1"></Label><Label Content="條屏地址：" Grid.Row="5" Grid.Column="1"></Label><Label Content="IP：" Grid.Row="7" Grid.Column="1"></Label><Label Content="設(shè)備注冊號：" Grid.Row="9" Grid.Column="1"></Label><Label Content="描述：" Grid.Row="11" Grid.Column="1"></Label><TextBox x:Name="textboxWin" Grid.Row="1" Grid.Column="2"></TextBox><TextBox x:Name="textboxEvalutor" Grid.Row="3" Grid.Column="2"></TextBox><TextBox x:Name="textboxStripeScreen" Grid.Row="5" Grid.Column="2"></TextBox><TextBox x:Name="textboxIP" Grid.Row="7" Grid.Column="2"></TextBox><TextBox x:Name="textboxRegNum" Grid.Row="9" Grid.Column="2"></TextBox><TextBox x:Name="textboxDec" Grid.Row="11" Grid.Column="2"></TextBox><Button Content="確定" x:Name="btnConfirm" Grid.Row="13" Grid.Column="2" Click="btnConfirm_Click"></Button></Grid> </Window> //后臺代碼（此界面成員的get,set用法） using System; using System.Windows; using System.Windows.Controls; namespace WPF_Study {/// <summary>/// Interaction logic for WindowUpdate.xaml/// </summary>public partial class WindowUpdate : Window{//獲取窗口編號public string Win{get { return this.textboxWin.Text; }private set { this.textboxWin.Text = value; }}//獲取或設(shè)置評價器地址public int Evaluator{get { return string.IsNullOrWhiteSpace(this.textboxEvalutor.Text)?0:Convert.ToInt32(this.textboxEvalutor.Text.Trim()); } set{this.textboxEvalutor.Text=value.ToString();}}//獲取或設(shè)置條屏地址public int StripeScreen{get { return string.IsNullOrWhiteSpace(this.textboxStripeScreen.Text) ? 0 : Convert.ToInt32(this.textboxStripeScreen.Text.Trim()); }set { this.textboxStripeScreen.Text = value.ToString(); }}//獲取或設(shè)置IP地址public string IP{get { return this.textboxIP.Text; }set { this.textboxIP.Text = value; }}//獲取或設(shè)置注冊設(shè)備號public string RegNum{get { return this.textboxRegNum.Text; }set { this.textboxRegNum.Text = value; }}//獲取或設(shè)置注冊設(shè)備號public string Description{get { return this.textboxDec.Text; }set { this.textboxDec.Text = value; }}//新增窗口構(gòu)造函數(shù)public WindowUpdate(){InitializeComponent();}//修改窗口構(gòu)造函數(shù)public WindowUpdate(string strWin):this(){this.Win = strWin;}private void btnConfirm_Click(object sender, RoutedEventArgs e){this.DialogResult = true;this.Close();}} } //實體 using System; using System.Xml; using System.Xml.Serialization;namespace WPF_Study.Entity {internal class QueueClient{public class Counter{[XmlAttribute("Window")]public string Win { get; set; }public string Description { get; set; }[XmlIgnore]public int Evalutor { get; set; }[XmlIgnore]public int StripeScreen { get; set; }[XmlIgnore]public string IP { get; set; }[XmlIgnore]public string RegNum { get; set; }}} }

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轉(zhuǎn)載于:https://www.cnblogs.com/come-on-come-on/p/4592144.html

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