Asp.net 导出Excel 处理科学计算法

public static void doExport(DataSet ds, string strExcelFileName) {

Excel.Application excel = new Excel.Application();

int rowIndex = 1;
int colIndex = 0;

excel.Application.Workbooks.Add(true);

System.Data.DataTable table = ds.Tables[0];
foreach(DataColumn col in table.Columns) {
colIndex++;
excel.Cells[1, colIndex] = col.ColumnName;
}

foreach(DataRow row in table.Rows) {
rowIndex++;
colIndex = 0;
Excel.Range range;
foreach(DataColumn col in table.Columns) {
colIndex++;
string type = col.DataType.ToString();
range = (Excel.Range) excel.Cells[rowIndex, colIndex];

switch (type) {
case "System.String":
range.NumberFormatLocal = "@";
break;
case "System.DateTime":
range.NumberFormatLocal = "yyyy-mm-dd";
range.ColumnWidth = 10;
break;
}
excel.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();

}
}
excel.Visible = false;
excel.ActiveWorkbook.SaveAs

(strExcelFileName, Excel.XlFileFormat.xlExcel9795, null, null, false, false, Excel.XlSaveAsAcce

ssMode.xlNoChange, null, null, null, null);

excel.Quit();
excel = null;

GC.Collect();
}