导出数据表与超过二十万行excel
本文关键字:十万 excel 数据表 | 更新日期: 2023-09-27 18:04:43
我试图导出一个数据表在我的应用程序excel。但是我的数据表包含了超过220万条记录,而我只能在excel中写入65536条记录。
在google上搜索了很多之后,才知道在2007年以前的版本中,只有65536条记录可以写入excel。
如果我们可以在excel中写入超过65536条记录,请告诉我
我没有在我的应用程序中使用microsoft office lib我正在使用一个类我自己写一个表excel
这是我的excel类
公共类ExcelWrite{private Stream流;private BinaryWriter;
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();
}
}
}
这些是官方限制。Excel 2007支持。xls和。xlsx格式文件,您确定正在编写较新的文件格式类型吗?这对你来说可能不是一个可行的选择,但我们使用Aspose。处理电子表格创建的单元格。
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)
请尝试将格式从"。xls"更改为"。xlsx"FileStream流=文件。Open("C:/Application/" + filename + ".xlsx", FileMode.Create);