GemBox.Spreadsheet如何实现Excel单元格中的公式计算

作者:控件中国网   出处:控件中国网   2016-10-20 10:00:07   阅读:20

GemBox.Spreadsheet是一款.NET控件,可以帮助开发人员来读取、写入、转换、打印电子数据表格文件 (XLSX, XLS, ODS, CSV, HTML, PDF or XPS),当在使用电子数据表格时最常用的是对单元格中的数据进行公式的计算,控件提供了ExcelCell.Calculate, ExcelWorksheet.Calculate 和 ExcelFile.Calculate方法用于单元格中输入公式的计算,具体使用方法可以参考下面的部分代码:
FormulaCalculation.png
using System;
using GemBox.Spreadsheet;
class Sample
{
    [STAThread]
    static void Main(string[] args)
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");
 
        ExcelFile ef = new ExcelFile();
        ExcelWorksheet ws = ef.Worksheets.Add("Formula Calculation");
 
        // Some formatting.
        ExcelRow row = ws.Rows[0];
        row.Style.Font.Weight = ExcelFont.BoldWeight;
 
        ExcelColumn col = ws.Columns[0];
        col.SetWidth(250, LengthUnit.Pixel);
        col.Style.HorizontalAlignment = HorizontalAlignmentStyle.Left;
        col = ws.Columns[1];
        col.SetWidth(250, LengthUnit.Pixel);
        col.Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
 
        // Use first row for column headers.
        ws.Cells["A1"].Value = "Formula";
        ws.Cells["B1"].Value = "Calculated value";
 
        // Enter some Excel formulas as text in first column.
        ws.Cells["A2"].Value = "=1 + 1";
        ws.Cells["A3"].Value = "=3 * (2 - 8)";
        ws.Cells["A4"].Value = "=3 + ABS(B3)";
        ws.Cells["A5"].Value = "=B4 > 15";
        ws.Cells["A6"].Value = "=IF(B5, \"Hello world\", \"World hello\")";
        ws.Cells["A7"].Value = "=B6 & \" example\"";
        ws.Cells["A8"].Value = "=CODE(RIGHT(B7))";
        ws.Cells["A9"].Value = "=POWER(B8, 3) * 0.45%";
        ws.Cells["A10"].Value = "=SIGN(B9)";
        ws.Cells["A11"].Value = "=SUM(B2:B10)";
 
        // Set text from first column as second row cell's formula.
        int rowIndex = 1;
        while (ws.Cells[rowIndex, 0].ValueType != CellValueType.Null)
            ws.Cells[rowIndex, 1].Formula = ws.Cells[rowIndex++, 0].StringValue;
 
        // GemBox.Spreadsheet supports single Excel cell calculation, ...
        ws.Cells["B2"].Calculate();
 
        // ... Excel worksheet calculation,
        ws.Calculate();
 
        // ... and whole Excel file calculation.
        ws.Parent.Calculate();
 
        ef.Save("Formula Calculation.xls");
    }
}
 
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