DataGrid在一行中重复从数据库中检索的数据两次

Question

我正在研究WPF中的销售点项目，我希望将所有记录（与当前或最后一个客户ID相关联）检索到datagrid。我在其他项目中完成了相同的工作，同时从表中选择*并检索它。但是这次不知道为什么这段代码不起作用。我的问题包括输出图像，请仔细看看。

<DataGrid x:Name="dataGrid" ItemsSource="{Binding DataSource}" HorizontalAlignment="Left" Margin="115,312,0,0" VerticalAlignment="Top" Height="376" Width="864">
    <DataGrid.Resources>
        <Style TargetType="{x:Type DataGridColumnHeader}">
            <Setter Property="Background" Value="#1C75BC" />
            <Setter Property="Foreground" Value="White"/>
            <Setter Property="BorderBrush" Value="Black" />
            <Setter Property="BorderThickness" Value="1" />
            <Setter Property="Height" Value="20" />
        </Style>
    </DataGrid.Resources>
    <DataGrid.Columns>
        <DataGridTextColumn Header="BarCode" Binding="{Binding BarCode}" Width="*" />
        <DataGridTextColumn Header="ProductName" Binding="{Binding ProductName}"  Width="*"/>
        <DataGridTextColumn Header="UnitPrice" Binding="{Binding UnitPrice}" Width="*" />
        <DataGridTextColumn Header="SalePrice" Binding="{Binding SalePrice}" Width="*" />
        <DataGridTextColumn Header="Quantity" Binding="{Binding Quantity}" Width="*" />                       
    </DataGrid.Columns>
</DataGrid>

private void FillDataGrid(int counttt)
{
    SqlConnection connn = db.getConnection();
    connn.Open();
    string CmdString = string.Empty;
    //DateTime dateTime = DateTime.UtcNow.Date;
    //String d = (dateTime.ToString("dd/MM/yyyy"));
    CmdString = "SELECT BarCode, ProductName, UnitPrice, SalePrice, Quantity From CustomerSale WHERE CId = '" + counttt + "'";
    SqlCommand cmd = new SqlCommand(CmdString, connn);
    SqlDataAdapter sda = new SqlDataAdapter(cmd);
    DataTable dt = new DataTable("CustomerSale");
    sda.Fill(dt);
    dataGrid.ItemsSource = dt.DefaultView;
    connn.Close();
}

Answer 1

禁用DataGrid.AutoGenerateColumns。您在标记（<DataGrid.Columns>）中为每个数据属性创建了列，并且在设置ItemsSource时，DataGrid还为每个属性生成列，因为AutoGenerateColumns的默认值为true。

<DataGrid x:Name="dataGrid" AutoGenerateColumns="False" ItemsSource="{Binding DataSource}" ...