108 lines
4.0 KiB
C#
108 lines
4.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Collections;
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using System.IO;
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using System.Web;
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namespace BLL
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{
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public static class FileStructService
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{
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/// <summary>
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/// 获取附件数据流类
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/// </summary>
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/// <param name="attachUrl">附件路径</param>
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/// <returns></returns>
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public static List<byte[]> GetFileStructByAttachUrl(string attachUrl)
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{
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List<byte[]> fileContext = new List<byte[]>();
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if (!String.IsNullOrEmpty(attachUrl))
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{
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string filePath = string.Empty;
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string physicalpath = Funs.RootPath;
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//HttpContext.Current.Request.PhysicalApplicationPath;
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filePath = physicalpath + attachUrl;
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if (File.Exists(filePath))
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{
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FileInfo fileInfo = new FileInfo(filePath);
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Stream stream = fileInfo.OpenRead();
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//读取指定大小的文件流内容到uploadFile.Context以便上传
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int b;
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while (stream.Position > -1 && stream.Position < stream.Length)
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{
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if (stream.Length - stream.Position >= 20000000)
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{
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b = 20000000;
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}
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else
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{
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b = (int)(stream.Length - stream.Position);
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}
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byte[] filebyte = new byte[b];
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stream.Read(filebyte, 0, b);
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fileContext.Add(filebyte);
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}
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stream.Close();
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}
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}
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return fileContext;
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}
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/// <summary>
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/// 获取附件数据流类 多附件的情况
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/// </summary>
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/// <param name="attachUrl">附件路径</param>
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/// <returns></returns>
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public static List<byte[]> GetMoreFileStructByAttachUrl(string attachUrl)
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{
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List<byte[]> fileContext = new List<byte[]>();
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if (!String.IsNullOrEmpty(attachUrl))
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{
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string[] strs = attachUrl.Trim().Split(',');
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foreach (var item in strs)
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{
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string filePath = string.Empty;
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string physicalpath = Funs.RootPath;
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//HttpContext.Current.Request.PhysicalApplicationPath;
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filePath = physicalpath + item;
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if (File.Exists(filePath))
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{
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FileInfo fileInfo = new FileInfo(filePath);
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if (fileInfo != null)
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{
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Stream stream = fileInfo.OpenRead();
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if (stream != null)
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{
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//读取指定大小的文件流内容到uploadFile.Context以便上传
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int b;
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while (stream.Position > -1 && stream.Position < stream.Length)
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{
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if (stream.Length - stream.Position >= 20000000)
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{
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b = 20000000;
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}
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else
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{
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b = (int)(stream.Length - stream.Position);
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}
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byte[] filebyte = new byte[b];
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stream.Read(filebyte, 0, b);
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fileContext.Add(filebyte);
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}
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}
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stream.Close();
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}
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}
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}
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}
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return fileContext;
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}
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}
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}
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