C# 创建、读取Excel公式

对于数据量较大的表格，需要计算一些特殊数值时，我们通过运用公式能有效提高我们数据处理的速度和效率，对于后期数据的增删改查等的批量操作也很方便。此外，对于某些数值的信息来源，我们也可以通过读取数据中包含的公式来获取。下面的示例中将分享通过c# 来创建、读取excel公式的方法。

工具使用

• spire.xls for .net 8.0

下载安装该类库后，注意在程序中添加引用spire.xls.dll（dll文件可在安装路径下的bin文件夹中获取）

代码示例（供参考）

【示例1】创建excel公式

步骤 1 ：新建工作簿

workbook workbook = new workbook();
worksheet sheet = workbook.worksheets[0];

步骤 2 : 添加测试数据及文本，并设置文本格式等

//初始化currentrow、currentformula
int currentcolumn = 1;
int currentrow = 1;
string currentformula = string.empty;

//设置1、2列列宽
sheet.setcolumnwidth(1, 20);
sheet.setcolumnwidth(2, 12);

//写入测试数据
sheet.range[currentcolumn, 1].value = "测试数据：";
sheet.range[currentcolumn, 2].numbervalue = 10;
sheet.range[currentcolumn, 3].numbervalue = 20; 
sheet.range[currentcolumn, 4].numbervalue = 30;
sheet.range[currentcolumn, 5].numbervalue = 40;
sheet.range[currentcolumn, 6].numbervalue = 50;

//写入文本并设置区域格式
currentrow += 2;
sheet.range[currentrow, 1].value = "公式"; 
sheet.range[currentrow, 2].value = "结果";
cellrange range = sheet.range[currentrow, 1, currentrow, 2];
range.style.font.isbold = true;
range.style.knowncolor = excelcolors.lightgreen1;
range.style.fillpattern = excelpatterntype.solid;
range.style.borders[borderslinetype.edgebottom].linestyle = linestyletype.medium;

步骤 3 ：写入函数

//算术运算
currentformula = "=1/2+3*4";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

//日期函数
currentformula = "=today()";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;
sheet.range[currentrow, 2].style.numberformat = "yyyy/mm/dd";

//时间函数
currentformula = "=now()";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;
sheet.range[currentrow, 2].style.numberformat = "h:mm am/pm";

//if逻辑函数
currentformula = "=if(b1=5,\"yes\",\"no\")";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

//pi函数
currentformula = "=pi()";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

//三角函数
currentformula = "=sin(pi()/6)";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

//计数函数
currentformula = "=count(b1:f1)";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

//求最大值函数
currentformula = "=max(b1:f1)";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

//平均值函数
currentformula = "=average(b1:f1)";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

//求和函数
currentformula = "=sum(b1:f1)";
sheet.range[++currentrow, 1].text = currentformula;
sheet.range[currentrow, 2].formula = currentformula;

步骤 4 :保存文档

workbook.savetofile("excel公式.xlsx", fileformat.version2013);
system.diagnostics.process.start("excel公式.xlsx");

完成代码后，调试运行程序，生成文档：

全部代码：

using spire.xls;

namespace createformula
{
    class program
    {
        static void main(string[] args)
        {
            //新建一个工作簿，获取第一张工作表
            workbook workbook = new workbook();
            worksheet sheet = workbook.worksheets[0];

            //初始化currentrow、currentformula
            int currentcolumn = 1;
            int currentrow = 1;
            string currentformula = string.empty;

            //设置1、2列列宽
            sheet.setcolumnwidth(1, 20);
            sheet.setcolumnwidth(2, 12);

            //写入测试数据
            sheet.range[currentcolumn, 1].value = "测试数据：";
            sheet.range[currentcolumn, 2].numbervalue = 10;
            sheet.range[currentcolumn, 3].numbervalue = 20; 
            sheet.range[currentcolumn, 4].numbervalue = 30;
            sheet.range[currentcolumn, 5].numbervalue = 40;
            sheet.range[currentcolumn, 6].numbervalue = 50;

            //写入文本并设置区域格式
            currentrow += 2;
            sheet.range[currentrow, 1].value = "公式"; 
            sheet.range[currentrow, 2].value = "结果";
            cellrange range = sheet.range[currentrow, 1, currentrow, 2];
            range.style.font.isbold = true;
            range.style.knowncolor = excelcolors.lightgreen1;
            range.style.fillpattern = excelpatterntype.solid;
            range.style.borders[borderslinetype.edgebottom].linestyle = linestyletype.medium;

            //算术运算
            currentformula = "=1/2+3*4";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //日期函数
            currentformula = "=today()";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;
            sheet.range[currentrow, 2].style.numberformat = "yyyy/mm/dd";

            //时间函数
            currentformula = "=now()";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;
            sheet.range[currentrow, 2].style.numberformat = "h:mm am/pm";

            //if逻辑函数
            currentformula = "=if(b1=5,\"yes\",\"no\")";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //pi函数
            currentformula = "=pi()";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //三角函数
            currentformula = "=sin(pi()/6)";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //计数函数
            currentformula = "=count(b1:f1)";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //求最大值函数
            currentformula = "=max(b1:f1)";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //平均值函数
            currentformula = "=average(b1:f1)";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //求和函数
            currentformula = "=sum(b1:f1)";
            sheet.range[++currentrow, 1].text = currentformula;
            sheet.range[currentrow, 2].formula = currentformula;

            //保存文档并打开
            workbook.savetofile("excel公式.xlsx", fileformat.version2013);
            system.diagnostics.process.start("excel公式.xlsx");
        }
    }
}

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【示例2】读取excel公式

步骤 1 ：实例化workbook类，加载测试文档

workbook workbook = new workbook();
workbook.loadfromfile("test.xlsx");

步骤 2 ：获取工作表

worksheet sheet = workbook.worksheets[0];

步骤 3：读取公式

//遍历[b1：b13]的单元格
foreach (var cell in sheet.range["b1:b13"])
{
    //判断是否含有公式
    if (cell.hasformula)
    {
        //输出含有公式的单元格及公式
        string certaincell = string.format("cell[{0},{1}]", cell.row, cell.column);
        console.writeline(certaincell + " 含有公式： " + cell.formula);
    }
}
console.readline();

公式读取结果：

全部代码：

using spire.xls;
using system;

namespace readformula
{
    class program
    {
        static void main(string[] args)
        {
            //实例化一个workbook
            workbook workbook = new workbook();

            //加载测试文档
            workbook.loadfromfile("test.xlsx");

            //获取第一个工作表
            worksheet sheet = workbook.worksheets[0];

            //遍历[b1：b13]的单元格
            foreach (var cell in sheet.range["b1:b13"])
            {
                //判断是否含有公式
                if (cell.hasformula)
                {
                    //输出含有公式的单元格及公式
                    string certaincell = string.format("cell[{0},{1}]", cell.row, cell.column);
                    console.writeline(certaincell + " 含有公式： " + cell.formula);
                }
            }
            console.readline();
        }
    }
}

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