.Net 通过下载链接保存Excel并打开
public string DoExcel(string url, IDictionary<string, string> parameters, ref CookieContainer cookieContainer, ref int statusCode
, string referer = "", string accept = "", string host = "")
{
HttpWebRequest req = GetWebRequest(url, "POST");
req.ContentType = "application/msexcel;charset=utf-8";
if (!string.IsNullOrEmpty(referer)) req.Referer = referer;
if (!string.IsNullOrEmpty(accept)) req.Accept = accept;
if (!string.IsNullOrEmpty(host)) req.Host = host;
req.CookieContainer = new CookieContainer();
if (cookieContainer != null && cookieContainer.Count > 0)
{
req.CookieContainer = cookieContainer;
}
req.Headers.Add("X-Requested-With", "XMLHttpRequest");
req.KeepAlive = true;
req.Headers.Add("Accept-Language", "zh-CN");
req.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/6.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)";
HttpWebResponse rsp = null;
Encoding encoding = null;
try
{
byte[] postData = Encoding.UTF8.GetBytes(BuildQuery(parameters));
Stream reqStream = req.GetRequestStream();
reqStream.Write(postData, 0, postData.Length);
reqStream.Close();
rsp = (HttpWebResponse)req.GetResponse();
//垃圾回收
System.GC.Collect();
encoding = Encoding.GetEncoding(rsp.CharacterSet);
}
catch (WebException ex)
{
HttpWebResponse rspEx = (HttpWebResponse)ex.Response;
if (rspEx != null) statusCode = (int)rspEx.StatusCode;
return ex.Message;
}
finally
{
if (rsp != null) statusCode = (int)rsp.StatusCode;
}
return GetResponseAsExcel(rsp, encoding, thirdNumber);
}
public string GetResponseAsExcel(HttpWebResponse rsp, Encoding encoding)
{
System.IO.Stream stream = null;
StreamReader reader = null;
try
{
// 以字符流的方式读取HTTP响应
stream = rsp.GetResponseStream();
reader = new StreamReader(stream, encoding);
string baseDire = AppDomain.CurrentDomain.BaseDirectory;
string path = System.IO.Path.Combine(baseDire, "excle\\" + DateTime.Now.ToString("yyyyMMdd") + "\\");
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
string returnPath = System.IO.Path.Combine(path, "_" + OptionHelper.GetUniqueIndentifier(3) + ".xls");
if (File.Exists(returnPath))
{
File.Delete(returnPath);
}
// 创建本地文件写入流
Stream fs = new FileStream(returnPath, FileMode.Create);
byte[] bArr = new byte[1024];
int size = stream.Read(bArr, 0, (int)bArr.Length);
while (size > 0)
{
fs.Write(bArr, 0, size);
size = stream.Read(bArr, 0, (int)bArr.Length);
}
fs.Close();
//if (rsp != null)
//{
// rsp.Close();
//}
//return reader.ReadToEnd();
return returnPath;
}
catch (Exception ex)
{
Logger.GetInstance().Error("解析异常：" + System.Environment.NewLine + ex.Message + ex.StackTrace);
return null;
}
finally
{
// 释放资源
if (reader != null) reader.Close();
if (stream != null) stream.Close();
if (rsp != null) rsp.Close();
//垃圾回收
System.GC.Collect();
}
}
这样子就能通过下载链接下载excel到本地了。在怎么打开表格的时候首先想到用Epplus，因为最近就在用这个，但是很悲催，用了这个第三方组件才知道不支持xls，只支持xlsx。
除了Epplus，之前还用过NPOI，这个是支持xls的，马上用nuget下载，定义一个帮助类ExcelUtility
public class ExcelUtility
{
/// <summary>
/// 将excel导入到datatable
/// </summary>
/// <param name="filePath">excel路径</param>
/// <param name="isColumnName">第一行是否是列名</param>
/// <returns>返回datatable</returns>
public static DataTable ExcelToDataTable(string filePath, bool isColumnName)
{
DataTable dataTable = null;
FileStream fs = null;
DataColumn column = null;
DataRow dataRow = null;
IWorkbook workbook = null;
ISheet sheet = null;
IRow row = null;
ICell cell = null;
int startRow = 0;
try
{
using (fs = File.OpenRead(filePath))
{
// 2007版本
if (filePath.IndexOf(".xlsx") > 0)
workbook = new XSSFWorkbook(fs);
// 2003版本
else if (filePath.IndexOf(".xls") > 0)
workbook = new HSSFWorkbook(fs);
if (workbook != null)
{
sheet = workbook.GetSheetAt(0);//读取第一个sheet，当然也可以循环读取每个sheet
dataTable = new DataTable();
if (sheet != null)
{
int rowCount = sheet.LastRowNum;//总行数
if (rowCount > 0)
{
IRow firstRow = sheet.GetRow(0);//第一行
int cellCount = firstRow.LastCellNum;//列数
//构建datatable的列
if (isColumnName)
{
startRow = 1;//如果第一行是列名，则从第二行开始读取
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
cell = firstRow.GetCell(i);
if (cell != null)
{
if (cell.StringCellValue != null)
{
column = new DataColumn(cell.StringCellValue);
dataTable.Columns.Add(column);
}
}
}
}
else
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
column = new DataColumn("column" + (i + 1));
dataTable.Columns.Add(column);
}
}
//填充行
for (int i = startRow; i <= rowCount; ++i)
{
row = sheet.GetRow(i);
if (row == null) continue;
dataRow = dataTable.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
cell = row.GetCell(j);
if (cell == null)
{
dataRow[j] = "";
}
else
{
//CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)
switch (cell.CellType)
{
case CellType.Blank:
dataRow[j] = "";
break;
case CellType.Numeric:
short format = cell.CellStyle.DataFormat;
//对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理
if (format == 14 || format == 31 || format == 57 || format == 58)
dataRow[j] = cell.DateCellValue;
else
dataRow[j] = cell.NumericCellValue;
break;
case CellType.String:
dataRow[j] = cell.StringCellValue;
break;
}
}
}
dataTable.Rows.Add(dataRow);
}
}
}
}
}
return dataTable;
}
catch (Exception)
{
if (fs != null)
{
fs.Close();
}
return null;
}
}
}
调用 ：using (DataTable dataTable = ExcelUtility.ExcelToDataTable(“绝对路径”, true))
完美收官。
