Question

我想在我们的应用程序中创建一个如下所示的DataGrid：

|Name|Email      |OC |Path|01.01.17|05.08.17|... (more dates and checkboxes)
|Foo |foo@bar.com|...|... |[x]     |        |...
|Bar |bar@bar.com|...|... |[ ]     |[x]     |...
|Foo |foo@bar.com|...|... |        |[ ]     |...

正如您所看到的，列数必须是动态的，复选框列可以包含复选框，也可以不包含任何内容。我的方法是使用转换器来构建我的DataTable。

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
    var techWithDates = (TechFvo[])value;
    var dataTable = new DataTable();

    dataTable.Columns.Add(new DataColumn("Name"));
    dataTable.Columns.Add(new DataColumn("Email"));
    dataTable.Columns.Add(new DataColumn("OC"));
    dataTable.Columns.Add(new DataColumn("Path"));

    if (techWithDates == null)
        return dataTable.DefaultView;

    var days = GetFormattedDays(techWithDates);
    foreach (var day in days)
        dataTable.Columns.Add(new DataColumn(day, typeof(bool)));

    dataTable.Rows.Add(dataTable.NewRow());

    foreach (var tech in techWithDates)
    {
        if (tech.GetTerminListe().Count == 0)
            continue;

        var dataRow = dataTable.NewRow();
        dataRow[0] = tech.Name;
        dataRow[1] = tech.EMail;
        dataRow[2] = string.IsNullOrWhiteSpace(tech.Path) ? "No" : "Yes";
        dataRow[3] = tech.Path;
        AddTechCols(dataRow, tech, days);
        dataTable.Rows.Add(dataRow);
    }

    return dataTable.DefaultView;
}

private void AddTechCols(DataRow row, TechFvo techs, List<string> aDays)
{
    var dates = techs.GetTerminListe();
    var datesAsStrList = new List<string>();
    foreach (var date in dates)
    {
        var thisStr = DateToString(date.Day);
        if (!datesAsStrList.Contains(thisStr))
            datesAsStrList.Add(thisStr);
    }

    foreach (var aDay in aDays)
    {
        if (datesAsStrList.Contains(aDay))
            row[aDay] = true;
        else
            row[aDay] = DBNull.Value;
    }
}

这样可行，但每行的每个复选框列都有复选框。在构建行时，如何隐藏列中的复选框？

我试过

row[aDay] = false;
row[aDay] = null;
row[aDay] = DbNull.Value();

但没有任何效果...... 谢谢！

Answer 1

您可以拦截创建DatagridCheckBoxColumns的时刻并更改CheckBoxes设置。

添加事件处理程序DataGrid.AutoGeneratingColumn事件

<DataGrid AutoGeneratingColumn="DataGrid_OnAutoGeneratingColumn">
</DataGrid>

// fixing checkboxes in DataGrid DataGridCheckBoxColumns
private void DataGrid_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    var column = e.Column as DataGridCheckBoxColumn;
    if (column == null)
        return;

    var dg = sender as DataGrid;
    if (dg == null)
        return;

    column.ElementStyle = (Style)dg.FindResource("DateChk");
    column.EditingElementStyle = (Style)dg.FindResource("DateChk");
}

“DateChk”是CheckBox样式，在参考资料中声明，当值为null（或DataTable中的DBNull.Value时）使CheckBox隐藏和禁用

<Style x:Key="DateChk" TargetType="CheckBox">
    <Style.Triggers>
        <Trigger Property="IsChecked" Value="{x:Null}">
            <Setter Property="Visibility" Value="Hidden"/>
            <Setter Property="IsEnabled" Value="False"/>
        </Trigger>
    </Style.Triggers>
</Style>

WPF：自定义Datagrid与Checboxes

1 个答案: