将DataTable导出到Excel

Question

可能重复:
如何在C#中将DataTable导出到Excel

我的TemplateExcel包含在我的项目中,我想将我的数据表导出到Excel,我想复制并保存这个模板,数据到处都想保存,我该怎么办？

Answer 1

你可以通过Excel Interop这样做:

using System;
using System.Data;
using System.Runtime.InteropServices;
using Excel = Microsoft.Office.Interop.Excel;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main()
        {
            Excel.Application application = new Excel.Application();
            Excel.Workbook workbook = application.Workbooks.Add();
            Excel.Worksheet worksheet = workbook.Sheets[1];

            DataTable dataTable = new DataTable();
            DataColumn column = new DataColumn("My Datacolumn");

            dataTable.Columns.Add(column);
            dataTable.Rows.Add(new object[] {"Foobar"});

            var columns = dataTable.Columns.Count;
            var rows = dataTable.Rows.Count;

            Excel.Range range = worksheet.Range["A1", String.Format("{0}{1}", GetExcelColumnName(columns), rows)];

            object[,] data = new object[rows,columns];

            for (int rowNumber = 0; rowNumber < rows; rowNumber++)
            {
                for (int columnNumber = 0; columnNumber < columns; columnNumber++)
                {
                    data[rowNumber, columnNumber] = dataTable.Rows[rowNumber][columnNumber].ToString();
                }
            }

            range.Value = data;

            workbook.SaveAs(@"C:\test\whatever123.xlsx");
            workbook.Close();

            Marshal.ReleaseComObject(application);
        }

        private static string GetExcelColumnName(int columnNumber)
        {
            int dividend = columnNumber;
            string columnName = String.Empty;
            int modulo;

            while (dividend > 0)
            {
                modulo = (dividend - 1) % 26;
                columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
                dividend = (int)((dividend - modulo) / 26);
            }

            return columnName;
        }
    }
}

我在这里所做的就是创建一个System.Data.DataTable对象,用一些数据填充它然后将它导出到Excel.这需要清理,添加错误处理,重构等,但基础是存在的.

感谢格雷厄姆的GetExcelColumnName方法.