使用C#导出Excel数据并保存多种格式的完整示例

Install-Package FreeSpire.XLS

using Spire.Xls;
using System.Data;
using System.IO;

// 创建工作簿
Workbook workbook = new Workbook();
Worksheet sheet = workbook.Worksheets[0];
sheet.Name = "EmployeeData";

// 创建 DataTable 并添加列
DataTable table = new DataTable();
table.Columns.Add("EmployeeID");
table.Columns.Add("FullName");
table.Columns.Add("Department");
table.Columns.Add("HireDate");
table.Columns.Add("Salary");

// 添加示例数据
table.Rows.Add("E101", "John Miller", "Finance", "2020-02-15", "7500");
table.Rows.Add("E102", "Sarah Brown", "HR", "2019-07-10", "6800");
table.Rows.Add("E103", "Michael Davis", "IT", "2021-01-22", "8200");
table.Rows.Add("E104", "Laura Wilson", "Marketing", "2018-11-18", "7100");
table.Rows.Add("E105", "Daniel Lee", "Sales", "2022-06-12", "6900");

// 将 DataTable 插入工作表，从第一行第一列开始，并保留列名
sheet.InsertDataTable(table, true, 1, 1);

// 应用内置样式
sheet.AllocatedRange.Rows[0].BuiltInStyle = BuiltInStyles.Heading2; // 标题行
for (int i = 1; i < sheet.AllocatedRange.Rows.Count(); i++)
{
    sheet.AllocatedRange.Rows[i].BuiltInStyle = BuiltInStyles.Accent2; // 数据行
}

// 自动调整列宽和行高
sheet.AllocatedRange.AutoFitColumns();
sheet.AllocatedRange.AutoFitRows();

// 保存为 Excel 2016 格式
workbook.SaveToFile("EmployeeData.xlsx", FileFormat.Version2016);

// 保存为 CSV
workbook.SaveToFile("EmployeeData.csv", FileFormat.CSV);

// 保存为 PDF
workbook.SaveToFile("EmployeeData.pdf", FileFormat.PDF);

// 保存到 MemoryStream
using (MemoryStream ms = new MemoryStream())
{
    workbook.SaveToStream(ms, FileFormat.Version2016);
    // 这里可以将 ms 写入数据库、发送 HTTP 响应等
}