詳細的程序碼如下：
MainPage.xaml
1: <UserControl x:Class="SlComboSample1_2.MainPage"
2: xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3: xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
4: xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
5: xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
6: mc:Ignorable="d"
7: d:DesignHeight="300" d:DesignWidth="400" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk">
8:
9: <Grid x:Name="LayoutRoot" Background="White">
10: <sdk:DataGrid AutoGenerateColumns="False" HorizontalAlignment="Left"
11: Margin="24,12,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="364"
12: Height="276" CellEditEnded="dataGrid1_CellEditEnded" LoadingRow="dataGrid1_LoadingRow">
13: <sdk:DataGrid.Columns>
14: <sdk:DataGridTemplateColumn CanUserReorder="True" CanUserResize="True" CanUserSort="True" Width="Auto" Header="PATIENT NAME" >
15: <sdk:DataGridTemplateColumn.CellTemplate>
16: <DataTemplate>
17: <TextBlock Text="{Binding PatientName}" Height="23" HorizontalAlignment="Left" Margin="10,10,0,0" Name="textBlock1" VerticalAlignment="Top" />
18: </DataTemplate>
19: </sdk:DataGridTemplateColumn.CellTemplate>
20: <sdk:DataGridTemplateColumn.CellEditingTemplate>
21: <DataTemplate>
22: <ComboBox ItemsSource="{Binding }" SelectedValuePath="PatientID" DisplayMemberPath="Name" SelectedValue="{Binding Patient,Mode=TwoWay}" Loaded="comboBox2_Loaded" Height="23" HorizontalAlignment="Left" Margin="10,43,0,0" Name="comboBox2" VerticalAlignment="Top" Width="120" />
23: </DataTemplate>
24: </sdk:DataGridTemplateColumn.CellEditingTemplate>
25: </sdk:DataGridTemplateColumn>
26: <sdk:DataGridTextColumn Binding="{Binding DiagnosisResult,Mode=TwoWay}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="Diagnosis Result" Width="Auto" />
27: </sdk:DataGrid.Columns>
28: </sdk:DataGrid>
29: </Grid>
30: </UserControl>
以下是MainPage.xaml背後的cs程序碼，其重點是首先在MainPage()內設定ComboBox的預設值及繫到Datagrid，接著要加程序碼於dataGrid1_LoadingRow事件，該事件是用來把ComboBox預設值以linq方式與patientList作配對去找出對應的TextBlock值，該事件會在DataGrid載入每一行列時被引發一次，(例如：在本示例中DataGrid共有三行列，即dataGrid1_LoadingRow事件會被引發三次。) 而事件中利用e.Row.GetIndex()去找出當中的列，並運用linq去找出該行ComboBox預設值所對應的TextBlock值。
MainPage.xaml.cs
1: using System;
2: using System.Collections.Generic;
3: using System.Linq;
4: using System.Windows;
5: using System.Windows.Controls;
6:
7: namespace SlComboSample1_2
8: {
9: public partial class MainPage : UserControl
10: {
11: List<Patient> patientList;
12:
13: public MainPage()
14: {
15: InitializeComponent();
16: // 新增四筆記錄到Patient類別,該類別用作ComboBox的選項來源
17: patientList = new List<Patient>();
18: patientList.Add(new Patient(1, "John"));
19: patientList.Add(new Patient(2, "Sam"));
20: patientList.Add(new Patient(3, "Barry"));
21: patientList.Add(new Patient(4, "Ken"));
22:
23: // 新增三筆Diagnosis記錄到DataGrid
24: List<Diagnosis> DiagnosisList = new List<Diagnosis>();
25: DiagnosisList.Add(new Diagnosis());
26: DiagnosisList.Add(new Diagnosis());
27: DiagnosisList.Add(new Diagnosis());
28:
29: //設定所有Diagnosis記錄的預設值為Barry
30: foreach (Diagnosis d in DiagnosisList)
31: {
32: d.Patient = 3;
33: }
34: dataGrid1.ItemsSource = DiagnosisList;
35: dataGrid1.CanUserSortColumns = false;
36:
37: }
38:
39: private void comboBox2_Loaded(object sender, RoutedEventArgs e)
40: {
41: ((ComboBox)sender).ItemsSource = patientList; //把patientList的集合繫結到ComboBox
42: }
43:
44: private void dataGrid1_CellEditEnded(object sender, DataGridCellEditEndedEventArgs e)
45: {
46: if (e.Column.Header.ToString().Equals("PATIENT NAME"))
47: {
48: List<Diagnosis> dList = ((DataGrid)sender).ItemsSource as List<Diagnosis>;
49: var patientname = from p in (patientList.AsQueryable()) where p.PatientID == (dList[((DataGrid)sender).SelectedIndex].Patient) select p.Name;
50: if (patientname.ToList().Count > 0)
51: {
52: Diagnosis row = (Diagnosis)e.Row.DataContext;
53: row.PatientName = Convert.ToString(patientname.ToList()[0]);
54: }
55: }
56: }
57:
58: private void dataGrid1_LoadingRow(object sender, DataGridRowEventArgs e)
59: {
60: //在DataGrid載入每行列時引發更新CellTemplate內TexkBlock的值
61: List<Diagnosis> dgList = ((DataGrid)sender).ItemsSource as List<Diagnosis>;
62: var patientname = from p in (patientList.AsQueryable()) where p.PatientID == (dgList[e.Row.GetIndex()].Patient) select p.Name;
63: if (patientname.ToList().Count > 0)
64: {
65: Diagnosis row = (Diagnosis)e.Row.DataContext;
66: row.PatientName = Convert.ToString(patientname.ToList()[0]);
67: }
68: }
69: }
70:
71: public class Diagnosis
72: {
73: private int patient;
74: private string diagnosisResult;
75: private string patientName;
76:
77: public Diagnosis() // 提供給DataGrid的資料來源類別
78: {
79: patient = 0; // 預設ComboBox的在Page開始時沒有選任何項目
80: diagnosisResult = null;
81: }
82:
83: public int Patient { get { return patient; } set { patient = value; } }
84: public string PatientName { get { return patientName; } set { patientName = value; } }
85: public string DiagnosisResult { get { return diagnosisResult; } set { diagnosisResult = value; } }
86: }
87:
88: public class Patient // 提供給ComboBox 的選項來源類別
89: {
90: private int patientID;
91: private string name;
92:
93: public Patient(int PatientID, string Name)
94: {
95: patientID = PatientID;
96: name = Name;
97: }
98: public int PatientID { get { return patientID; } set { patientID = value; } }
99: public string Name { get { return name; } set { name = value; } }
100: }
101: }
完整程序碼下載地址：
https://docs.google.com/open?id=0BxRiNrIXEFArQkNUSXE1ZXRTRzZ1cHBvUjAtV3Fkdw
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