如何在Excel Interop中将导出数据优化为excel? [英] How to optimize exporting data to excel in Excel Interop?

问题描述

我正在使用Excel interop从查询结果中创建excel工作簿.当有成千上万的记录时，要花很长时间才能生成工作簿.以下代码是我如何填充单元格的示例.

I am using Excel interop to create excel workbooks from my query results. When there are thousands of records it takes a long time for the workbook to be generated. The below code is a sample of how I am populating the cells.

RowNo = 1
For i = 1 To 4000
   ColNo = 1
   For j = 1 To 5
      Dim cell As excel.Range = ws.Cells(RowNo, ColNo)
      Dim value = j
      cell.Value = value
      ColNo = ColNo + 1
   Next
   RowNo = RowNo + 1
Next

要运行上述代码，需要花费一分钟以上的时间.我该如何优化呢?

For the above code to run it takes more than a minute. How can I optimize it?

推荐答案

找到了答案.您可以将数据写入数组，然后将数组写入excel范围，而不是逐个单元地写入数据.参见 http: //www.clear-lines.com/blog/post/Write-data-to-an-Excel-worksheet-with-C-fast.aspx

Found the answer. You can write data to an array and then write the array to the excel range rather than writing the data cell by cell. See http://www.clear-lines.com/blog/post/Write-data-to-an-Excel-worksheet-with-C-fast.aspx

private static void WriteArray(int rows, int columns, Worksheet worksheet)
{
    var data = new object[rows, columns];
    for (var row = 1; row <= rows; row++)
    {
        for (var column = 1; column <= columns; column++)
        {
            data[row - 1, column - 1] = "Test";
        }
    }

    var startCell = (Range)worksheet.Cells[1, 1];
    var endCell = (Range)worksheet.Cells[rows, columns];
    var writeRange = worksheet.Range[startCell, endCell];

    writeRange.Value2 = data;
}

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