Question

如何从流中打开.xls文件？

using (MemoryStream ms = new MemoryStream())
using (CryptoStream sc = new CryptoStream(ms, new FromBase64Transform(FromBase64TransformMode.IgnoreWhiteSpaces), CryptoStreamMode.Write))
using (StreamWriter sw = new StreamWriter(cs))
{
    sw.Write(base64String);
    sw.Flush;
}

我正在尝试使用Microsoft.Office.Interop，但看起来它的Excel.Application().Workbooks.Open方法只是启动了Excel应用程序。

Answer 1

要从流中读取，可以使用ExcelDataReader软件包：

using ExcelDataReader;

using (MemoryStream ms = new MemoryStream())
using (CryptoStream sc = new CryptoStream(ms, new 
FromBase64Transform(FromBase64TransformMode.IgnoreWhiteSpaces), CryptoStreamMode.Write))
using (StreamWriter sw = new StreamWriter(cs))
{
    sw.Write(base64String);
    sw.Flush;

    using (IExcelDataReader er = ExcelReaderFactory.CreateBinaryReader(ms))
    {
        while(er.Read())
        {
            for (int i = 0; i < er.FieldCount; i++)
                Console.Write(er.GetValue(i) + " ");
            Console.WriteLine();
        }
    }
}

然后，您可能需要另外安装ExcelDataReader.DataSet软件包。

Answer 2

通过名为EPPlus的库，您可以通过以下方式实现此目标：

using (var package = new ExcelPackage(stream))
{
    var currentSheet = package.Workbook.Worksheets;
    var workSheet = currentSheet.First();
    workSheet.Cells[1,1].Value = "Text in first row and first column"; // EPPlus index of columns and rows are from 1 not 0

    using(var memStream = new MemoryStream())
    {
        package.SaveAs(memStream);

        using(var fileStream = File.Create("path"))
        {
                byte[] buffer = new byte[1024];
            int bytesRead;
            do
            {
                bytesRead = memStream.Read(buffer, 0, buffer.Length);
                fileStream.Write(buffer, 0, bytesRead);
            } while (bytesRead > 0);
        }
    }
}

C＃直接从流中打开和编辑.xls文件

2 个答案: