C#-生成Excel文件

引入命名空间：

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

创建Sheet:　　

var app = new Microsoft.Office.Interop.Excel.Application();
Workbook wb = app.Workbooks.Add(System.Reflection.Missing.Value);
Worksheet ws = wb.Sheets[1];

设置格式：

Range allRange = ws.Range[ws.Cells[1, 1], ws.Cells[5, 5]];
Range titleRange = ws.Range[ws.Cells[1, 1], ws.Cells[1, 5]];
Range mainRange = ws.Range[ws.Cells[1, 2], ws.Cells[5, 2]];
allRange.Font.Name = "Times New Roman";
allRange.WrapText = false;
titleRange.Font.Bold = true;
titleRange.Font.Size = 15;
titleRange.EntireColumn.AutoFit();
titleRange.Borders.LineStyle = XlLineStyle.xlContinuous;
titleRange.Interior.ColorIndex = ExcelColor.green;
mainRange.Interior.ColorIndex = ExcelColor.cyan;

填充内容：

ws.Cells[1, 1] = "ID";
ws.Cells[1, 2] = "Name";
ws.Cells[1, 3] = "Age";
ws.Cells[1, 4] = "Number";
ws.Cells[1, 5] = "Address";
for (int j = 1; j < 5; j++)
{
    ws.Cells[1 + j, 1] = j;
    ws.Cells[1 + j, 2] = "名称" + j;
    ws.Cells[1 + j, 3] = 20 + j;
    ws.Cells[1 + j, 4] = 123450 + j;
    ws.Cells[1 + j, 5] = "地址" + j;
}

保存到文件，释放进程：

ws.SaveAs(file, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);
wb.Close(false, Type.Missing, Type.Missing);
wb = null;
app.Quit();
GC.Collect();
KeyProcess.Kill(app);

ColorIndex:

class ExcelColor
{
    public const int transparent = 0;
    public const int black = 1;
    public const int white = 2;
    public const int red = 3;
    public const int green = 4;
    public const int blue = 33;
    public const int yellow = 6;
    public const int pink = 7;
    public const int cyan = 8;
    public const int darkRed = 9;
    public const int dark = 29;
    public const int gray = 15;
    public const int darkCyan = 31;
    public const int darkSlateBlue = 51;
}

释放进程函数:

class KeyProcess
{
    [DllImport("User32.dll", CharSet = CharSet.Auto)]
    static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);
    public static void Kill(Microsoft.Office.Interop.Excel.Application excel)
    {
        IntPtr add = new IntPtr(excel.Hwnd);
        int pid = 0;
        GetWindowThreadProcessId(add, out pid);
        System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(pid);
        p.Kill();
    }
}