Question

我创建了ListView ComboBox

<ListView x:Name="lstvAttendance" Margin="0,53,0,10">
        <ListView.View>
            <GridView>
                <GridViewColumn Header="ID" Width="0" DisplayMemberBinding="{Binding Path=Id}"/>
                <GridViewColumn Header="Emp Code" Width="100" DisplayMemberBinding="{Binding Path=emp_id}"/>
                <GridViewColumn Header="Employee Name" Width="160" DisplayMemberBinding="{Binding Path=name}"/>
                <GridViewColumn Header="Status" Width="90">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox x:Name="cmbStatus" Width="75" Text="{Binding Path=status}" SelectedItem="{Binding Path=status}">
                                <ComboBoxItem Content="P"/>
                                <ComboBoxItem Content="A"/>
                            </ComboBox>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
                <GridViewColumn Header="Date" Width="135">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <DatePicker x:Name="dtpDate" Width="120" Text="{Binding attendance_date}"/>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
                <GridViewColumn Header="Reg Date" Width="140" DisplayMemberBinding="{Binding Path=reg_date}"/>
                <GridViewColumn Header="Last Update" Width="140" DisplayMemberBinding="{Binding Path=last_update}"/>
                <GridViewColumn Header="Delete" Width="70">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <Button x:Name="btnRemove" Content="Remove" Width="60" BorderThickness="0" CommandParameter="{Binding}" HorizontalContentAlignment="Right" Style="{StaticResource DelImg}" Cursor="Hand" Foreground="Blue"/>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView>
        </ListView.View>
</ListView>

我需要绑定此ComboBox（ComboBox有P或A）。对于从DataBase绑定这些ListView，我创建了一个类{{ 1}}。

Attendance

然后：

public class Attendance
{
     public string Id { get; set; }
     public string emp_id { get; set; }
     public string name { get; set; }
     public string status { get; set; }   //Either P or A
     public string attendance_date { get; set; }
     public string reg_date { get; set; }
     public string last_update { get; set; }
}

我的代码适用于try { using (SqlConnection con = new SqlConnection(DBCon.conStr)) { con.Open(); using (SqlCommand cmd = new SqlCommand(AppConstraints.LIST_VIEW_ATTENDANCE)) { cmd.Connection = con; cmd.CommandType = CommandType.StoredProcedure; using (SqlDataReader dr = cmd.ExecuteReader()) { while (dr.Read()) { lstvAttendance.Items.Add(new Attendance() { Id = dr["Id"].ToString(), emp_id = dr["emp_id"].ToString(), name = dr["name"].ToString(), attendance_datedr["attendance_date"].ToString(), status = dr["status"].ToString(), reg_date = dr["reg_date"].ToString(), last_update = dr["last_update"].ToString() }); } } } } } catch (Exception ex) { MessageBox.Show(ex.Message); }中的其他字段。但ListView值未选中。我需要帮助来选择与数据库值相关的ComboBox值。

Answer 1

首先：创建List Attendance而不是将项目添加到lstvAttendance，然后设置lstvAttendance＆＃39; s { {1}}像这样：

ItemsSource

其次：您错过了List<Attendance> lst = new List<Attendance>(); try { .... .... while (dr.Read()) { lst.Add(new Attendance() { .... } } ... ... lstvAttendance.ItemsSource = lst; } catch { .... }的{{1}}属性，应该是这样的：

ItemsSource

Answer 2

您应该使用SelectedValuePath绑定然后绑定到viewModel的SelectedValue=status属性。绑定到SelectedItem将始终包含实际选定的项（ComboBoxItem）而不是实际值。

 <ComboBox x:Name="cmbStatus" Width="75" SelectedValuePath="{Binding Path=Content}" SelectedValue="{Binding Path=status}">
       <ComboBoxItem Content="P"/>
       <ComboBoxItem Content="A"/>
 </ComboBox>

在ListView中绑定Combox

2 个答案: