Execl导入系统

public bool UserInfoUploadFile()

        {

            bool h = true;

            try

            {

                if (Request.Files != null && Request.Files.Count != 0)

                {

                    HttpPostedFileBase file = Request.Files[0];

                    string path = file.FileName;//获取Execle文件名   

                    string oldfilename = System.IO.Path.GetFileNameWithoutExtension(path);

                    string IsXls = System.IO.Path.GetExtension(path).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名 

                    string fileName = DateTime.Now.ToString("yyyyMMddhh") + IsXls;

                    string savePath = Server.MapPath(("~\\Upload\\") + oldfilename + fileName);//Server.MapPath 获得虚拟服务器相对路径

                    file.SaveAs(savePath); //SaveAs 将上传的文件内容保存在服务器上 

                    DataTable dt = Common.ExcelToTable(savePath, oldfilename + fileName);//调用自定义方法 

                    DataRow[] dr = dt.Select();//定义一个DataRow数组

                    int rowsnum = dt.Rows.Count;//统计共有多少数据

                    if (rowsnum == 0)//判断数据为空时

                    {

                        Response.Write("Excel表为空表,无数据!");//当Excel表为空时,对用户进行提示

                        h = false;

                        return h;

                    }

                    else

                    {

                        string Str = "";

                        string StrV = "";

                        #region 添加

                        for (int i = 0; i < dr.Length; i++)//不为空时，用for循环

                        {

                            //try

                            //{

                            string StdName = dr[i]["标准或规范名称"].ToString();

                            string StdNo = dr[i]["标准或规范编号"].ToString();

                            string UserNo = dr[i]["需求人"].ToString();

                            

                            //}

                            //catch { }

                        }

                        h = true;

                        Response.Write("数据上传成功!");

                        #endregion

                    }

                }

            }

            catch (Exception kl)

            {

                Response.Write("部分数据未能导入成功");

                h = false;

            }

            return h;

        }

/// <summary>
/// Excel导入成Datable
/// </summary>
/// <param name="file">导入路径(包含文件名与扩展名)</param>
/// <returns></returns>
public static DataTable ExcelToTable(string file, string table)
{
try
{
DataTable dt = new DataTable();
IWorkbook workbook;
string fileExt = Path.GetExtension(file).ToLower();
using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
{
//XSSFWorkbook 适用XLSX格式，HSSFWorkbook 适用XLS格式
if (fileExt == ".xlsx") { workbook = new XSSFWorkbook(fs); } else if (fileExt == ".xls") { workbook = new HSSFWorkbook(fs); } else { workbook = null; }
if (workbook == null) { return null; }
ISheet sheet = workbook.GetSheetAt(0);

//表头 
IRow header = sheet.GetRow(sheet.FirstRowNum);
List<int> columns = new List<int>();
for (int i = 0; i < header.LastCellNum; i++)
{
object obj = GetValueType(header.GetCell(i));
if (obj == null || obj.ToString() == string.Empty)
{
dt.Columns.Add(new DataColumn("Columns" + i.ToString()));
}
else
dt.Columns.Add(new DataColumn(obj.ToString()));
columns.Add(i);
}
//数据

for (int i = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++)
{
try
{
DataRow dr = dt.NewRow();
bool hasValue = false;
foreach (int j in columns)
{
dr[j] = GetValueType(sheet.GetRow(i).GetCell(j));
if (dr[j] != null && dr[j].ToString() != string.Empty)
{
hasValue = true;
}
}
if (hasValue)
{
dt.Rows.Add(dr);
}
var A = i;
}
catch (Exception ex)
{
return null;
}
}

}
return dt;
}
catch (Exception ex)
{
return null;
}
}

/// <summary>
/// 获取单元格类型
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
private static object GetValueType(ICell cell)
{
if (cell == null)
return null;
switch (cell.CellType)
{
case CellType.Blank: //BLANK: 
return null;
case CellType.Boolean: //BOOLEAN: 
return cell.BooleanCellValue;
case CellType.Numeric: //NUMERIC: 
short format = cell.CellStyle.DataFormat;
if (format != 0) { return cell.DateCellValue; } else { return cell.NumericCellValue; }
case CellType.String: //STRING: 
return cell.StringCellValue;
case CellType.Error: //ERROR: 
return cell.ErrorCellValue;
case CellType.Formula: //FORMULA: 
default:
return "=" + cell.CellFormula;
}
}