C# NPOI修改xlsx表格

来源：互联网发布：网络男歌手好听的歌编辑：程序博客网时间：2024/06/05 17:05

public static void RenderToExcel()
{
/* FileStream fs = null;

if (!File.Exists("test.xlsx"))
{
FileStream fs = new FileStream(@"D:\test.xlsx", FileMode.Create, FileAccess.Write);
}
else
{ */
FileStream fs =File.Open(@"D:\test.xlsx", FileMode.Open, FileAccess.ReadWrite);

// using (FileStream fs = new FileStream(@"D:\test.xlsx", FileMode.Create, FileAccess.Write))
// {

IWorkbook workbook = new XSSFWorkbook(fs);
{
XSSFSheet sheet = workbook.GetSheetAt(0) as XSSFSheet;
{
XSSFRow headerRow = sheet.GetRow(0) as XSSFRow;

XSSFCell cell = headerRow.GetCell(1) as XSSFCell;
Console.WriteLine("cell={0}",cell);
cell.SetCellValue("lanfang");
fs.Close();
}
using (var wook = new FileStream(@"D:\test.xlsx", FileMode.Create, FileAccess.Write))
{
workbook.Write(wook);
}
}

}

private static void WriteExcelFile01(string filename)
{
Console.WriteLine("************WriteExcelFile{0}里的内容***************", filename);
var ext = Path.GetExtension(filename).ToLower();
// using (FileStream fs = File.OpenWrite(filename)) //打开myxls.xls文件
using (FileStream fs = File.Open(filename, FileMode.Open, FileAccess.Read))
{

IWorkbook wk01;
if (ext.Contains(".xlsx"))
wk01 = new XSSFWorkbook(fs);
else
wk01 = new HSSFWorkbook(fs);
fs.Close();
ISheet sheet01 = wk01.GetSheetAt(0);
Console.WriteLine("表格中共有{0}行数据", sheet01.LastRowNum);
for (int j = 0; j <= sheet01.LastRowNum; j++) //当前表的总行数，j=1 避开第一行
{
IRow row = sheet01.GetRow(j); //读取当前行数据
if (row != null)
{
ICell cell01 = row.GetCell(0);//当前行第1个单元格内容==key
ICell cell02 = row.GetCell(1);//当前行第2个单元格内容==value
if(cell02==null)
{
cell02 = row.CreateCell(1);
cell02.SetCellValue(string.Empty);
}
if (cell01 != null && cell01.ToString().StartsWith("var"))
{
if(ExlKey.Contains(cell01.ToString())) //如果文件中的key在key数组里
{
Console.WriteLine("cell01[{0}]={1},cell02={2}", j, cell01.ToString(), cell02.ToString());
Console.WriteLine("ExlValue[{0}]={1}", j, ExlValue[j]);
int x = 0;//在ExlValue数组里，元素从0开始
x = j-1;
// ReplaceExcel(filename, ExlValue[x], x);
cell01.SetCellValue(ExlValue[x]);
}
}
}
}
try
{
FileStream fileStream = File.Open(filename, FileMode.Open, FileAccess.Write);
Console.WriteLine("保存的文件是：{0}", filename);
wk01.Write(fileStream);

fileStream.Close();
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
}
}

}

private static void ReplaceExcel(string tempPath, string CellValue, int CellNum)
{
Console.WriteLine("************替换{0}里的内容***************",tempPath);
IWorkbook wk = null;
var ext1 = Path.GetExtension(tempPath).ToLower();
using (FileStream fs = File.Open(tempPath, FileMode.Open,
FileAccess.Read, FileShare.ReadWrite))
{
//把xls文件读入workbook变量里，之后就可以关闭了
if (ext1.Contains(".xlsx"))
wk = new XSSFWorkbook(fs);
else
wk = new HSSFWorkbook(fs);
fs.Close();
}
//在第二行创建行
ISheet sheet = wk.GetSheetAt(0);
// CellNum += 1;
IRow row01 = sheet.GetRow(CellNum);
if (row01 != null)
{
ICell cell01 = row01.GetCell(0);
if(cell01!=null){
cell01.SetCellValue(CellValue);
}
}
// using (FileStream fileStream = File.Open(tempPath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
try
{
FileStream fileStream = File.OpenWrite(tempPath);
wk.Write(fileStream);
fileStream.Close();
}
catch(Exception e)
{
Debug.WriteLine(e.Message);
}
}

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