性能问题从excel中获取价值并将其加载到字典中

Question

private void btnImportFromxls_Click(object sender, RoutedEventArgs e) 
    { 
     Excel.Application myapp = new Excel.Application(); 
     Excel.Workbook wb = myapp.Workbooks.Open(@"D:\MyExcel.xls"); 
     Excel.Worksheet sheet = (Excel.Worksheet)wb.Worksheets.get_Item(1); 
     Dictionary<object, object> dictionary = new Dictionary<object, object>(); 
     for (int i = 1; i < sheet.UsedRange.Rows.Count; i++) 
     { 
      object key = ((Excel.Range)sheet.Cells[i, 1]).Value2; 
      object value = ((Excel.Range)sheet.Cells[i, 2]).Value2; 

      dictionary.Add(key,value); 
     } 
    } 

具有8,000行数据的excel文件（MyExcel.xls）。当我尝试使用上面的代码将数据加载到字典中时，将excel数据加载到字典中需要很长时间。有没有其他的方法来加快数据加载到字典？

Answer 1

不是通过在范围内的所有细胞快速迭代是这样的：

using XLS = Microsoft.Office.Interop.Excel; 

object[,] arrWks; 
object objKom; 
string strKom; 

arrWks = (object[,])sheet.UsedRange.get_Value(XLS.XlRangeValueDataType.xlRangeValueDefault); 

for (int intRow=arrWks.GetLowerBound(0); intRow<=arrWks.GetUpperBound(0); intRow++) 
{ 
    for (int intCol=arrWks.GetLowerBound(1); intCol<=arrWks.GetUpperBound(1); intCol++) 
    { 
     objKom = arrWks[intRow, intCol]; 
     strKom = objKom == null ? "" : objKom.ToString();  

     //do rest of your logic here 
    } 
} 

相反迭代整个arrWks的，你只能通过指定的列重复了。