Question

我正在尝试将数据表导出到我的应用程序中的excel。但我的数据表包含超过2 20万条记录，我只能写入65536条记录到Excel。

在google上搜索了很多内容之后，我们发现只有65536条记录可以在2007年之前的版本中写入excel。

如果我们可以写出超过65536条记录，请告诉我们

我没有在我的应用程序中使用microsoft office lib 我正在使用我自己的一个类，它将表写入excel

这是我的excel课程

公共类ExcelWrite { 私有流流; 私人BinaryWriter作家;

    private ushort[] clBegin = { 0x0809, 8, 0, 0x10, 0, 0 };
    private ushort[] clEnd = { 0x0A, 00 };


    private void WriteUshortArray(ushort[] value)
    {
        for (int i = 0; i < value.Length; i++)
            writer.Write(value[i]);
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="ExcelWriter"/> class.
    /// </summary>
    /// <param name="stream">The stream.</param>
    public ExcelWrite(Stream stream)
    {
        this.stream = stream;
        writer = new BinaryWriter(stream);
    }
    public ExcelWrite()
    {

    }
    /// <summary>
    /// Writes the text cell value.
    /// </summary>
    /// <param name="row">The row.</param>
    /// <param name="col">The col.</param>
    /// <param name="value">The string value.</param>
    public void WriteCell(int row, int col, string value)
    {
        ushort[] clData = { 0x0204, 0, 0, 0, 0, 0 };
        int iLen = value.Length;
        byte[] plainText = Encoding.ASCII.GetBytes(value);
        clData[1] = (ushort)(8 + iLen);
        clData[2] = (ushort)row;
        clData[3] = (ushort)col;
        clData[5] = (ushort)iLen;
        WriteUshortArray(clData);
        writer.Write(plainText);
    }

    /// <summary>
    /// Writes the integer cell value.
    /// </summary>
    /// <param name="row">The row number.</param>
    /// <param name="col">The column number.</param>
    /// <param name="value">The value.</param>
    public void WriteCell(int row, int col, int value)
    {
        ushort[] clData = { 0x027E, 10, 0, 0, 0 };
        clData[2] = (ushort)row;
        clData[3] = (ushort)col;
        WriteUshortArray(clData);
        int iValue = (value << 2) | 2;
        writer.Write(iValue);
    }

    /// <summary>
    /// Writes the double cell value.
    /// </summary>
    /// <param name="row">The row number.</param>
    /// <param name="col">The column number.</param>
    /// <param name="value">The value.</param>
    public void WriteCell(int row, int col, double value)
    {
        ushort[] clData = { 0x0203, 14, 0, 0, 0 };
        clData[2] = (ushort)row;
        clData[3] = (ushort)col;
        WriteUshortArray(clData);
        writer.Write(value);
    }

    /// <summary>
    /// Writes the empty cell.
    /// </summary>
    /// <param name="row">The row number.</param>
    /// <param name="col">The column number.</param>
    public void WriteCell(int row, int col)
    {
        ushort[] clData = { 0x0201, 6, 0, 0, 0x17 };
        clData[2] = (ushort)row;
        clData[3] = (ushort)col;
        WriteUshortArray(clData);
    }

    /// <summary>
    /// Must be called once for creating XLS file header
    /// </summary>
    public void BeginWrite()
    {
        WriteUshortArray(clBegin);
    }

    /// <summary>
    /// Ends the writing operation, but do not close the stream
    /// </summary>
    public void EndWrite()
    {
        WriteUshortArray(clEnd);
        writer.Flush();
    }
    public void exporttoExcel(DataTable table,string filename)
    {
        DataTable dt = new DataTable();
        try
        {

            StringBuilder SB = new StringBuilder();

            dt = table;

            if (dt.Rows.Count > 0)
            {
                FileStream stream = File.Open("C:/Application/" + filename + ".xls", FileMode.Create);

                ExcelWrite excelWriter = new ExcelWrite(stream);
                //AB_MISreports.Util.ExcelWrite excelWriter = new AB_MISreports.Util.ExcelWrite(stream);
                excelWriter.BeginWrite();
                for (int i = 0; i < dt.Columns.Count; i++)
                {
                    excelWriter.WriteCell(0, i, dt.Columns[i].ColumnName.ToString());
                    for (int j = 0; j < dt.Rows.Count; j++)
                    {
                        excelWriter.WriteCell(j + 1, i, dt.Rows[j][i].ToString());
                    }
                }

                excelWriter.EndWrite();
                stream.Close();

                HttpContext.Current.Response.ContentType = "application/vnd.xls";
                HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename=" + filename + ".xls");
                HttpContext.Current.Response.TransmitFile("C:/Application/" + filename + ".xls");
                HttpContext.Current.Response.End();
                HttpContext.Current.Response.Flush();

            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
        finally
        {

            dt.Dispose();
        }

    }
}

Answer 1

这些是官方限制。 Excel 2007支持.xls和.xlsx格式文件，您确定要编写较新的文件格式类型吗？它可能不适合您，但我们使用Aspose.Cells来处理电子表格创建。

Excel 2003 .xls - 65,536行
（http://office.microsoft.com/en-gb/excel-help/excel-specifications-and-limits-HP005199291.aspx）

Excel 2007 .xlsx - 1,048,576行
（http://office.microsoft.com/en-gb/excel-help/excel-specifications-and-limits-HP010073849.aspx）

Excel 2010 .xlsx - 1,058,576行
（http://office.microsoft.com/en-gb/excel-help/excel-specifications-and-limits-HP010342495.aspx）

Answer 2

请尝试将格式格式从“.xls”更改为“.xlsx” FileStream stream = File.Open（“C：/ Application /”+ filename +“。xlsx”，FileMode.Create）;

导出具有超过二十万行的数据表以优于

2 个答案: