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WPF DataGridにネストされたComboBoxから選択した値を取得する必要があります。問題は、選択した値そのものではなく、ComboBox（List）にバインドされているデータにしかアクセスできないようです。 ComboBoxアイテム、それがDataGridにあり、Listにバインドされている場合、ComboBoxアイテムに選択された値をどのようにしてアクセスできますか？ ComboBoxがうまくいっているだけで、選択肢にアクセスする方法がわかりません。DataGridのComboBoxから値を取得する
私はしばらくの間これで苦労してきたので、私は心から任意の助けいただければ幸いです：
XAML：
<Window x:Class="hotels.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="700" Width="1000" Loaded="Window_Loaded" WindowStyle="ThreeDBorderWindow">
<ScrollViewer>
<StackPanel Orientation="Vertical" Margin="20">
<WrapPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
<Label Content="Room:" HorizontalAlignment="Left" Margin="0,0,0,0" VerticalAlignment="Center" />
<TextBox x:Name="roomTextBox" Margin="5,0,0,0" TextWrapping="Wrap" Width="50" Panel.ZIndex="-1" VerticalAlignment="Center"/>
<Label x:Name="locationLabel" Content="Location:" Margin="25,0,0,0" VerticalAlignment="Center" HorizontalAlignment="Right"/>
<ComboBox x:Name="locationComboBox" SelectionChanged="filterEmployees" ItemsSource="{Binding}" Margin="5,0,0,0" SelectedIndex="-1" VerticalAlignment="Center" Width="150"/>
<Label x:Name="inspectLabel" Content="Inspector:" HorizontalAlignment="Left" Margin="50,0,0,0" VerticalAlignment="Center" Height="27"/>
<ComboBox x:Name="inspectorBox" ItemsSource="{Binding}" HorizontalAlignment="Left" Margin="15,0,0,0" VerticalAlignment="Center" Width="100"/>
<Label x:Name="empLabel" Content="Attendant:" HorizontalAlignment="Left" Margin="50,0,0,0" VerticalAlignment="Center"/>
<ComboBox x:Name="employeeBox" ItemsSource="{Binding}" HorizontalAlignment="Left" Margin="5,0,0,0" VerticalAlignment="Center" Width="100"/>
</WrapPanel>
<WrapPanel>
<Label x:Name="scoreLabel" Content="Score: "></Label>
<Label x:Name="currentPointLabel"></Label>
<Label x:Name="totalPointLabel"></Label>
</WrapPanel>
<DataGrid x:Name="itemGrid" AutoGenerateColumns="False" ItemsSource="{Binding}" HorizontalAlignment="Stretch" Margin="0,0,0,0" VerticalAlignment="Stretch" MinHeight="400" Height="400" >
<DataGrid.Columns>
<DataGridTextColumn IsReadOnly="True" Header="Name" Binding="{Binding Name}" CanUserResize="False" />
<DataGridTextColumn IsReadOnly="True" Header="Description" Binding="{Binding Description}" />
<DataGridTextColumn IsReadOnly="True" Header="Points Possible" Binding="{Binding Points}" />
<DataGridTemplateColumn Header="Deductions">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox ItemsSource="{Binding Score}" SelectedIndex="0" Se SelectionChanged="updateScore" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Header="Comments" MinWidth="100">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBox Text="{Binding Comments}"></TextBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
<Button x:Name="submitButton" Click="submitData" Content="Submit" HorizontalAlignment="right" Margin="00, 0, 00, 00 " VerticalAlignment="Center" Width="75"/>
</StackPanel>
</ScrollViewer>
</Window>
と事前にC＃
public partial class MainWindow : Window
{
private SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings[0].ConnectionString);
private DataSet ds = new DataSet();
private int totalPoints;
private int currentPoints;
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
employeeBox.IsEnabled = false;
inspectorBox.IsEnabled = false;
initializeData();
currentPoints = totalPoints;
totalPointLabel.Content = " \\ " + totalPoints;
}
private void initializeData()
{
try { con.Open(); }
catch (SqlException er) { Console.Write(er); }
String query = "SELECT * from dbo.locations";
SqlDataAdapter locAdapter = new SqlDataAdapter(query, con);
locAdapter.Fill(ds, "Locations");
query = "SELECT * from dbo.report";
SqlDataAdapter reportAdapter = new SqlDataAdapter(query, con);
reportAdapter.Fill(ds, "Reports");
SqlCommand insert = new SqlCommand("INSERT into dbo.report (report_id, inspector, employee, room, date, score) " + " VALUES (@report_id, @inspector, @employee, @room, @date, @score)", con);
insert.Parameters.Add("@report_id", SqlDbType.Int, 5, "report_id");
insert.Parameters.Add("@inspector", SqlDbType.Int, 5, "inspector");
insert.Parameters.Add("@employee", SqlDbType.Int, 4, "employee");
insert.Parameters.Add("@date", SqlDbType.Date, 50);
insert.Parameters.Add("@score", SqlDbType.Int, 4);
reportAdapter.InsertCommand = insert;
query = "SELECT * from dbo.report_details";
SqlDataAdapter detailsAdapter = new SqlDataAdapter(query, con);
detailsAdapter.Fill(ds, "Details");
insert = new SqlCommand("INSERT into dbo.report_details (reportID, itemID, points, comments) " + " VALUES (@reportID, @itemID, @points, @comments)", con);
insert.Parameters.Add("@reportID", SqlDbType.Int, 5, "reportID");
insert.Parameters.Add("@itemID", SqlDbType.Int, 5, "itemID");
insert.Parameters.Add("@points", SqlDbType.Int, 4, "points");
insert.Parameters.Add("@comments", SqlDbType.Text, 150);
detailsAdapter.InsertCommand = insert;
locationComboBox.DataContext = ds.Tables["Locations"];
locationComboBox.DisplayMemberPath = "locName";
DataTable grid = new DataTable("Grid");
grid.Columns.Add("ID", typeof(int));
grid.Columns.Add("Name", typeof(String));
grid.Columns.Add("Description", typeof(String));
grid.Columns.Add("Points", typeof(Int16));
grid.Columns.Add("Score", typeof(List<int>));
grid.Columns.Add("Comments", typeof(String));
query = "SELECT itemID, name, description, points, category FROM dbo.items";
SqlDataReader reader = new SqlCommand(query, con).ExecuteReader();
while (reader.Read())
{
DataRow row = grid.NewRow();
row["ID"] = reader["itemID"];
row["Name"] = reader["name"];
row["Description"] = reader["description"];
row["Points"] = reader["points"];
totalPoints += (int)reader["points"];
int pointsPossible = (int)reader["points"];
List<int> rowList = new List<int>();
for (int i = pointsPossible; i >= 0; i--)
{
rowList.Add(i);
}
rowList.Sort();
row["Score"] = rowList;
grid.Rows.Add(row);
}
ds.Tables.Add(grid);
itemGrid.ItemsSource = ds.Tables["Grid"].DefaultView;
}
private void filterEmployees(object sender, SelectionChangedEventArgs e)
{
DataRowView row = (DataRowView)locationComboBox.SelectedItem;
Int16 locationID = Int16.Parse(row["locID"].ToString());
employeeBox.IsEnabled = true;
inspectorBox.IsEnabled = true;
if (ds.Tables["Employees"] != null) {
ds.Tables["Employees"].Rows.Clear();
}
String query = "SELECT * from dbo.employees where empLocation = " + locationID;
SqlDataAdapter empAdapter = new SqlDataAdapter(query, con);
empAdapter.Fill(ds, "Employees");
employeeBox.DataContext = ds.Tables["Employees"];
employeeBox.DisplayMemberPath = "empName";
inspectorBox.DataContext = ds.Tables["Employees"];
inspectorBox.DisplayMemberPath = "empName";
}
private void submitData(object sender, RoutedEventArgs e)
{
DataRow reportRow = ds.Tables["Reports"].NewRow();
DataRowView inspectorSelection = (DataRowView)inspectorBox.SelectedItem;
reportRow["inspector"] = Int16.Parse(inspectorSelection["empID"].ToString());
DataRowView empSelection = (DataRowView)employeeBox.SelectedItem;
reportRow["employee"] = Int16.Parse(inspectorSelection["empID"].ToString());
reportRow["room"] = Int16.Parse(roomTextBox.Text);
reportRow["date"] = DateTime.Now.ToString("yyy-MM-dd");
reportRow["score"] = "";
}
private void updateScore(object sender, SelectionChangedEventArgs e)
{
foreach (DataRowView row in itemGrid.ItemsSource)
{
// returns the List, not the ComboBox
}
}
}
}
感謝を。
Iをあなたのコードを調べる時間がありませんが、通常のキャスティングを試してみましたか？選択した行を取得する - >正しいセルを取得する - >文字列にキャストする（ToString（）） –