C# 在ASP.NETC中将大型数据导出到excel#
我正在尝试将一个数据集导出到excel文件。数据集包含20多个数据表(每个表将在最终输出excel文件中显示为单独的表格),每个表包含30+k行,约10列。我正在从其他资源读取这些数据,并将其保存到数据集中。不使用任何数据库来存储它。我正在使用来自的开放XML和封闭XML来完成这个过程。它可以在15-20个数据表中正常工作,但超过25个数据表会占用太多时间。对此,我们将非常感谢您的任何建议或帮助 示例代码:C# 在ASP.NETC中将大型数据导出到excel#,c#,asp.net,openxml-sdk,closedxml,C#,Asp.net,Openxml Sdk,Closedxml,我正在尝试将一个数据集导出到excel文件。数据集包含20多个数据表(每个表将在最终输出excel文件中显示为单独的表格),每个表包含30+k行,约10列。我正在从其他资源读取这些数据,并将其保存到数据集中。不使用任何数据库来存储它。我正在使用来自的开放XML和封闭XML来完成这个过程。它可以在15-20个数据表中正常工作,但超过25个数据表会占用太多时间。对此,我们将非常感谢您的任何建议或帮助 示例代码: using (XLWorkbook wb = new XLWorkbook()) {
using (XLWorkbook wb = new XLWorkbook())
{
foreach (DataTable dt in dsData.Tables)
{
wb.Worksheets.Add(dt);
}
Response.Clear();
Response.Buffer = true;
Response.Charset = "";
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("content-disposition", "attachment;filename=DataSet.xlsx");
wb.SaveAs(Response.OutputStream);
Response.Flush();
Response.End();
}
经过一些研究,我找到了一个解决方案,我用100多万个数据测试了下面的代码,效果很好。也许这对其他人会有帮助。 我删除了closedxml引用,并添加了“Interop.Microsoft.Office.Core.dll”引用。然后我编写了以下代码 所需命名空间: 使用Excel=Microsoft.Office.Interop.Excel, 使用System.Runtime.InteropServices
Excel.Workbook xlWorkBook;
Excel.Application xlApp;
Excel.Worksheet xlWorkSheet;
Excel.Range Startrange;
Excel.Range HeaderStartrange;
public bool StartExport(DataTable dtbl, bool isFirst, bool isLast, string strOutputPath, string TemplateLocation, string TemplateFullName, int SectionOrder, int totalNoOfSheets)
{
bool isSuccess = false;
try
{
if (isFirst)
{
CopyTemplate(TemplateLocation, strOutputPath, TemplateFullName);
xlApp = new Excel.Application();
if (xlApp == null)
{
throw new Exception("Excel is not properly installed!!");
}
xlWorkBook = xlApp.Workbooks.Open(@strOutputPath + TemplateFullName, 0, false, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
// To Add Sheets Dynamically
for (int i = 0; i <= totalNoOfSheets; i++)
{
int count = xlWorkBook.Worksheets.Count;
Excel.Worksheet addedSheet = xlWorkBook.Worksheets.Add(Type.Missing,
xlWorkBook.Worksheets[count], Type.Missing, Type.Missing);
addedSheet.Name = "Sheet " + i.ToString();
}
}
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(SectionOrder);
Startrange = xlWorkSheet.get_Range("A2");
HeaderStartrange = xlWorkSheet.get_Range("A1");
FillInExcel(Startrange, HeaderStartrange, dtbl);
xlWorkSheet.Name = dtbl.TableName;
if (isLast)
{
xlApp.DisplayAlerts = false;
xlWorkBook.SaveAs(@strOutputPath + TemplateFullName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing);
xlWorkBook.Close(true, null, null);
xlApp.Quit();
Marshal.ReleaseComObject(xlWorkSheet);
Marshal.ReleaseComObject(xlWorkBook);
Marshal.ReleaseComObject(xlApp);
GC.WaitForPendingFinalizers();
GC.Collect();
isSuccess = true;
}
}
catch (Exception ex)
{
isSuccess = false;
throw;
}
return isSuccess;
}
private void FillInExcel(Excel.Range startrange, Excel.Range HeaderStartRange, DataTable dtblData)
{
int rw = 0;
int cl = 0;
try
{
// Fill The Report Content Data Here
rw = dtblData.Rows.Count;
cl = dtblData.Columns.Count;
string[,] data = new string[rw, cl];
// Adding Columns Here
for (var row = 1; row <= rw; row++)
{
for (var column = 1; column <= cl; column++)
{
data[row - 1, column - 1] = dtblData.Rows[row - 1][column - 1].ToString();
}
}
Excel.Range endRange = (Excel.Range)xlWorkSheet.Cells[rw + (startrange.Cells.Row - 1), cl + (startrange.Cells.Column - 1)];
Excel.Range writeRange = xlWorkSheet.Range[startrange, endRange];
writeRange.Value2 = data;
writeRange.Formula = writeRange.Formula;
data = null;
startrange = null;
endRange = null;
writeRange = null;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
Excel.工作簿xl工作簿;
Excel.applicationxlapp;
Excel工作表;
Excel.Range Startrange;
Excel.Range Headers StartRange;
公共bool StartExport(DataTable dtbl、bool isFirst、bool isLast、string strOutputPath、string templatellocation、string TemplateFullName、int SectionOrder、int totalNoOfSheets)
{
bool isSuccess=错误;
尝试
{
如果(isFirst)
{
CopyTemplate(TemplateLocation、strOutputPath、TemplateFullName);
xlApp=new Excel.Application();
如果(xlApp==null)
{
抛出新异常(“Excel未正确安装!!”;
}
xlWorkBook=xlApp.Workbooks.Open(@strOutputPath+TemplateFullName,0,false,5,“,”,true,Microsoft.Office.Interop.Excel.XlPlatform.xlWindows,“\t”,false,false,0,true,1,0);
//动态添加图纸的步骤
对于(inti=0;i经过一些研究,我找到了一个解决方案,我用100多万个数据测试了下面的代码,它运行得很好。可能对其他人有帮助。
我删除了closedxml引用并添加了“Interop.Microsoft.Office.Core.dll”引用
所需命名空间:
使用Excel=Microsoft.Office.Interop.Excel,
使用System.Runtime.InteropServices
Excel.Workbook xlWorkBook;
Excel.Application xlApp;
Excel.Worksheet xlWorkSheet;
Excel.Range Startrange;
Excel.Range HeaderStartrange;
public bool StartExport(DataTable dtbl, bool isFirst, bool isLast, string strOutputPath, string TemplateLocation, string TemplateFullName, int SectionOrder, int totalNoOfSheets)
{
bool isSuccess = false;
try
{
if (isFirst)
{
CopyTemplate(TemplateLocation, strOutputPath, TemplateFullName);
xlApp = new Excel.Application();
if (xlApp == null)
{
throw new Exception("Excel is not properly installed!!");
}
xlWorkBook = xlApp.Workbooks.Open(@strOutputPath + TemplateFullName, 0, false, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
// To Add Sheets Dynamically
for (int i = 0; i <= totalNoOfSheets; i++)
{
int count = xlWorkBook.Worksheets.Count;
Excel.Worksheet addedSheet = xlWorkBook.Worksheets.Add(Type.Missing,
xlWorkBook.Worksheets[count], Type.Missing, Type.Missing);
addedSheet.Name = "Sheet " + i.ToString();
}
}
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(SectionOrder);
Startrange = xlWorkSheet.get_Range("A2");
HeaderStartrange = xlWorkSheet.get_Range("A1");
FillInExcel(Startrange, HeaderStartrange, dtbl);
xlWorkSheet.Name = dtbl.TableName;
if (isLast)
{
xlApp.DisplayAlerts = false;
xlWorkBook.SaveAs(@strOutputPath + TemplateFullName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing);
xlWorkBook.Close(true, null, null);
xlApp.Quit();
Marshal.ReleaseComObject(xlWorkSheet);
Marshal.ReleaseComObject(xlWorkBook);
Marshal.ReleaseComObject(xlApp);
GC.WaitForPendingFinalizers();
GC.Collect();
isSuccess = true;
}
}
catch (Exception ex)
{
isSuccess = false;
throw;
}
return isSuccess;
}
private void FillInExcel(Excel.Range startrange, Excel.Range HeaderStartRange, DataTable dtblData)
{
int rw = 0;
int cl = 0;
try
{
// Fill The Report Content Data Here
rw = dtblData.Rows.Count;
cl = dtblData.Columns.Count;
string[,] data = new string[rw, cl];
// Adding Columns Here
for (var row = 1; row <= rw; row++)
{
for (var column = 1; column <= cl; column++)
{
data[row - 1, column - 1] = dtblData.Rows[row - 1][column - 1].ToString();
}
}
Excel.Range endRange = (Excel.Range)xlWorkSheet.Cells[rw + (startrange.Cells.Row - 1), cl + (startrange.Cells.Column - 1)];
Excel.Range writeRange = xlWorkSheet.Range[startrange, endRange];
writeRange.Value2 = data;
writeRange.Formula = writeRange.Formula;
data = null;
startrange = null;
endRange = null;
writeRange = null;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
Excel.工作簿xl工作簿;
Excel.applicationxlapp;
Excel工作表;
Excel.Range Startrange;
Excel.Range Headers StartRange;
公共bool StartExport(DataTable dtbl、bool isFirst、bool isLast、string strOutputPath、string templatellocation、string TemplateFullName、int SectionOrder、int totalNoOfSheets)
{
bool isSuccess=错误;
尝试
{
如果(isFirst)
{
CopyTemplate(TemplateLocation、strOutputPath、TemplateFullName);
xlApp=new Excel.Application();
如果(xlApp==null)
{
抛出新异常(“Excel未正确安装!!”;
}
xlWorkBook=xlApp.Workbooks.Open(@strOutputPath+TemplateFullName,0,false,5,“,”,true,Microsoft.Office.Interop.Excel.XlPlatform.xlWindows,“\t”,false,false,0,true,1,0);
//动态添加图纸的步骤
对于(int i=0;我定义“花费太多时间”。打开文件或下载文件需要多长时间?为什么要保存到MemoryStream,然后立即将其复制到OutputStream?为什么不保存到OutputStream?通常我不会尝试将整个数据库保存到excel。首先,数据库可能包含更多的数据excel无法管理。您将数据库保存到excel的原因是什么?@FrankerZ将数据表添加到XLWorkbook对象时需要20多分钟。@Jzl:您的意思是说无法单独打开数据表?必须一次全部打开?定义“占用太多时间”。打开文件或下载文件需要多长时间?为什么要保存到MemoryStream,然后立即将其复制到OutputStream?为什么不保存到OutputStream?通常我不会尝试将整个数据库保存到excel。首先,数据库可能包含更多的数据excel无法管理。您将数据库保存到excel的原因是什么?@FrankerZ将数据表添加到XLWorkbook对象时需要20多分钟。@Jzl:您的意思是说无法单独打开数据表?必须一次全部打开?CopyTemplate不存在CopyTemplate不存在