Question

我有问题。我可以将已经数据从我的excel文件导入到我的Datagridview，但是我注意到我的excel文件中的时间在导入到我的datagridview时变成了十进制值，这让我很困惑希望你可以帮我解决这个问题。

这是我的导入代码。注意：我从我的主表单触发导入操作，但填充我的第二个表单的datagridview。

 private void importWeatherReportToolStripMenuItem_Click(object sender, EventArgs e)
    {
        ImportWeatherData import = new ImportWeatherData();

        if (import.datareport_dgv.Rows.Count > 0)
        {
            openFileDialog1.InitialDirectory = "C:";
            openFileDialog1.Title = "Open Excel File";
            openFileDialog1.Filter = "Excel Files(2003)|*.xls|Excel Files(2007)|*.xlsx";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
                Microsoft.Office.Interop.Excel.Workbook workbook = app.Workbooks.Open(openFileDialog1.FileName);
                Microsoft.Office.Interop.Excel.Worksheet worksheet = workbook.ActiveSheet;
                int rcount = worksheet.UsedRange.Rows.Count;                         
                for (int i = 1; i < rcount; i++)
                {
                   DataGridViewRow todayRow2 = new DataGridViewRow();
                   todayRow2.CreateCells(import.datareport_dgv);
                   int index = 0;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 1].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 2].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 3].Value; //time error 
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 4].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 5].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 6].Value; //time error
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 7].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 8].Value; //time error
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 9].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 10].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 11].Value; //time error
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 12].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 13].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 14].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 15].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 16].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 17].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 18].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 19].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 20].Value;
                   todayRow2.Cells[index++].Value = worksheet.Cells[i + 1, 21].Value;

                   //add this row to the grid
                   import.datareport_dgv.Rows.Add(todayRow2);
                   //import.datareport_dgv.Rows.Add(worksheet.Rows[i+1].Cells[j++].Value, worksheet.Rows[i+1].Cells[j++].Value);                        
                }                                         
            }
            import.Show();
        }
    }

我在上面的某些行上做了评论，其中时间变成了十进制值。

这是我从excel导入的一行示例：我用＆＃34; |＆＃34;让您轻松了解细胞值。

1/15/2015 12:42 | 33.4 | 12:42 PM | 33.4 | 33.4 | 12:42 PM | 60.8 | 12:42 PM | 60.8 | 60.8 12:42 PM | 100632.25 | 12:42 PM | 100632.25 | 100632.25 | 12:42 PM | 0 | 0 | 0 | 0 | 0

虽然这个值是我的datagridview中显示的值：这是上面一行的导入的excel行。

1/15/2015 12:42:35 PM   |33.40 °C   |0.529166666666667  |33.40 °C   |33.40 °C   |0.529166666666667  |61%    |0.529166666666667  |61%    |61%    |0.529166666666667  |100,632Pa  |0.529166666666667  |100,632Pa  |100,632Pa  |0.529166666666667  |0  |0  |0  |0  |0

希望你能帮助我。如果这是一个重复的问题，请不要给我负面的分数感谢

Answer 1

MS Excel将日期存储为浮点值。整数部分表示天数，小数部分表示小时，分钟和秒。

请参阅我对这个问题的回答： Getting time values from an Excel sheet

对于每个时间值，您的代码应与此类似。

float excelValue = worksheet.Cells[i + 1, 3].Value;

int miliseconds = (int)Math.Round(excelValue*86400000);
int hour = miliseconds/( 60/*minutes*/*60/*seconds*/*1000 );
miliseconds = miliseconds - hour*60/*minutes*/*60/*seconds*/*1000;
int minutes = miliseconds/( 60/*seconds*/*1000 );
miliseconds = miliseconds - minutes*60/*seconds*/*1000;
int seconds = miliseconds/1000;

todayRow2.Cells[index++].Value = hour + ":" + minutes + ":" + seconds;

Excel到DataGridView：excel的时间值在导入时变为十进制值

1 个答案: