WPF DataGrid“单元格式等效项”

发布于 2024-11-01 04:40:48 字数 717 浏览 5 评论 0原文

我正在尝试从 WinForms 转换为 WPF，并且在使用 DataGridView -> 时遇到了一些困难WPF 数据网格。

我已经很好地加载了所有数据，只是停留在单元格格式上。

有一个包含数字的列，但是如果数字为零，而不是显示 0，我希望它显示 NIL。

使用 DataGridView，下面的方法有效

    Private Sub SampleDGV_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles SampleDGV.CellFormatting

    Try
        If e.RowIndex >= 0 And e.ColumnIndex = SampleDGV.Columns(CostColumn.Name).Index Then
            If CDec(e.Value.ToString) = 0 Then
                e.Value = "NIL"
                e.FormattingApplied = True
            End If
        End If
    Catch ex As Exception

    End Try


End Sub

但现在我对 WPF 的等效项感到困惑

原文

I'm trying to convert from WinForms to WPF and am struggling a bit with DataGridView -> WPF DataGrid.

I've got all the data loading nicely, just stuck on the cell formatting.

There is a column with numbers, however if the number is zero, rather than show 0, I'd like it to display NIL.

With DataGridView, the below worked

    Private Sub SampleDGV_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles SampleDGV.CellFormatting

    Try
        If e.RowIndex >= 0 And e.ColumnIndex = SampleDGV.Columns(CostColumn.Name).Index Then
            If CDec(e.Value.ToString) = 0 Then
                e.Value = "NIL"
                e.FormattingApplied = True
            End If
        End If
    Catch ex As Exception

    End Try


End Sub

But now I'm stumped on the WPF equivalent

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生活了然无味 2024-11-08 04:40:48

我不确定是否有一种简单的方法可以做到这一点，我会这样做，这似乎确实有效：

使用自定义转换器定义自定义列：

<DataGrid.Resources>
    <local:ZeroToNilConverter x:Key="ZeroToNilConverter"/>
</DataGrid.Resources>
<DataGrid.Columns>
    <DataGridTextColumn Binding="{Binding Id, Converter={StaticResource ZeroToNilConverter}}" Header="Test"/>
</DataGrid.Columns>

//Sorry, i do not speak VB...
public class ZeroToNilConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        int input = 0;
        try
        {
            input = (int)value;
        }
        catch (Exception)
        {
            return value;
        }

        if (input == 0) return "NIL";
        else return value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        string input = value as string;
        if (input != null)
        {
            if (input == "NIL") return 0;
            else return value;
        }
        else
        {
            return value;
        }
    }
}

I am not sure if there is an easy way to do this, i'd do it like this which does seem to work:

Define a custom column with a custom converter:

<DataGrid.Resources>
    <local:ZeroToNilConverter x:Key="ZeroToNilConverter"/>
</DataGrid.Resources>
<DataGrid.Columns>
    <DataGridTextColumn Binding="{Binding Id, Converter={StaticResource ZeroToNilConverter}}" Header="Test"/>
</DataGrid.Columns>

//Sorry, i do not speak VB...
public class ZeroToNilConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        int input = 0;
        try
        {
            input = (int)value;
        }
        catch (Exception)
        {
            return value;
        }

        if (input == 0) return "NIL";
        else return value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        string input = value as string;
        if (input != null)
        {
            if (input == "NIL") return 0;
            else return value;
        }
        else
        {
            return value;
        }
    }
}

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