使用EPPlus从Excel读取超过24小时的持续时间

Question

我正在尝试从excel中读取特定单元格的文本值。该值是一个将多个单元格相加的公式。

到目前为止，我已经尝试过：

            worksheet.Cells["E42"].Style.Numberformat.Format  = "hh:mm"; //and [hh]:mm
            result = worksheet.Cells["E42"].Text;

使用FromAoDate将worksheet.Cells["E42"].Value转换为DateTime对我也不起作用。 最好的结果是08:20，这比实际值少了24小时。

编辑： 建议的结果

        worksheet.Cells["E42"].Style.Numberformat.Format  = "[hh]:mm";
        result = worksheet.Cells["E42"].Text; //returns "08"

        worksheet.Cells["E42"].Style.Numberformat.Format  = "hh:mm";
        result = worksheet.Cells["E42"].Text; //returns "08:20"

        worksheet.Cells["E42"].Style.Numberformat.Format  = "hh:mm";
        result = worksheet.Cells["E42"].Text;
        result = TimeSpan.TryParse((string)result, out TimeSpan tres); //returns 08:20:00

        worksheet.Cells["E42"].Style.Numberformat.Format  = "[hh]:mm";
        result = worksheet.Cells["E42"].Text;
        result = TimeSpan.TryParse((string)result, out TimeSpan tres); //returns 8.00:00:00

        //converting to DateTime has similar results

       result = DateTime.FromOADate(Convert.ToDouble(worksheet.Cells["E42"].Value)); 
       //returns 31.12.1899 08:20:00

Answer 1

这将为您提供一个TimeSpan对象，该对象应该可以满足您的需求。

string result = worksheet.Cells["E42"].Text;
TimeSpan timeResult;

string[] split = result.Split(':');
timeResult = new TimeSpan(int.Parse(split[0]), int.Parse(split[1]), 0);

Answer 2

我还没有找到合适的解决方案，但是有办法。

<Page
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:ADSO.ViewModel"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:syncfusion="using:Syncfusion.UI.Xaml.Charts"
x:Class="ADSO.MainPage"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

<Page.DataContext>
    <local:VoltageViewModel/>
</Page.DataContext>

<Grid>
    <syncfusion:SfChart HorizontalAlignment="Center" VerticalAlignment="Center" Margin="20,20,20,20">
        <syncfusion:SfChart.PrimaryAxis>
            <syncfusion:DateTimeAxis Header="Time" Interval="10" IntervalType="Minutes" Minimum="9/22/2018" Maximum="9/23/2018"/>
        </syncfusion:SfChart.PrimaryAxis>
        <syncfusion:SfChart.SecondaryAxis>
            <syncfusion:NumericalAxis Header="Voltage (V)"/>
        </syncfusion:SfChart.SecondaryAxis>
        <syncfusion:LineSeries ItemsSource="{Binding Path=Data}" XBindingPath="Timestamp" YBindingPath="Value" >
        </syncfusion:LineSeries>
    </syncfusion:SfChart>
</Grid>

var worksheet = package.Workbook.Worksheets[2]; var value = worksheet.Cells["E42"].GetValue<DateTime>(); //the cell contains 32:20 in excel //returns 31.12.1899 08:20:00 var value2 = worksheet.Cells["E39"].GetValue<DateTime>(); //the cell contains 00:00 in excel // which returns 30.12.1899 00:00:00 var t = value.Subtract(value2); //returns 1.08:20:00, which translates to 32:20:00 日期似乎转换为00:00 和DateTime.Parse("30.12.1899 00:00:00");到33:20，因此通过减去我们可以恢复实际时间跨度。

这是一个示例实现：

31.12.1899 08:20:00