using System;
using System.Collections;
using System.Collections.Generic;
using System.Data.Linq;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using BLL;

namespace BLL
{
    /// <summary>
    /// 上传附件相关
    /// </summary>
    public class UploadAttachmentService
    {
        #region 附件显示
        /// <summary>
        /// 附件显示
        /// </summary>
        /// <param name="rootValue">文件夹路径</param>
        /// <param name="path">附件路径</param>
        /// <returns>附件显示HTML</returns>
        public static string ShowAttachment(string rootValue, string path)
        {
            string htmlStr = string.Empty;
            if (!string.IsNullOrEmpty(path))
            {
                htmlStr = "<table runat='server' cellpadding='5' cellspacing='5' style=\"width: 100%\"><tr>";
                string[] arrStr = path.Split(new string[] { "," }, System.StringSplitOptions.RemoveEmptyEntries);
                for (int i = 0; i < arrStr.Length; i++)
                {
                    if (!string.IsNullOrEmpty(arrStr[i]))
                    {
                        string[] urlArray = arrStr[i].Split('\\');
                        string scanUrl = string.Empty;
                        for (int j = 0; j < urlArray.Length; j++)
                        {
                            scanUrl += urlArray[j] + "|";
                        }

                        string url = rootValue + arrStr[i].Replace('\\', '/');                        
                        string[] subUrl = url.Split('/');
                        string fileName = subUrl[subUrl.Count() - 1];
                        string newFileName = fileName.Substring(fileName.IndexOf("~") + 1);
                        if (newFileName.Contains("_"))
                        {
                            if (newFileName.Substring(0, 1) == "_")
                            {
                                newFileName = newFileName.Substring(1, newFileName.Length - 1);
                            }
                            else
                            {
                                newFileName = newFileName.Replace(newFileName.Split('_')[0], "");
                                newFileName = newFileName.Substring(1);
                            }
                        }
                        htmlStr += "<td style=\"width: 60%\" align=\"left\"><span style='cursor:pointer;cursor:pointer;cursor:pointer;TEXT-DECORATION: underline;color:blue' onclick=\"window.open('" + url + "')\">" + newFileName + "</span></td>";
                    }
                }

                htmlStr += "</tr></table>";
            }

            return htmlStr;
        }
        #endregion


        #region 附件显示 带删除
        /// <summary>
        /// 附件显示
        /// </summary>
        /// <param name="rootValue">文件夹路径</param>
        /// <param name="path">附件路径</param>
        /// <returns>附件显示HTML</returns>
        public static string ShowAndDeleteAttachment(string rootValue, string path)
        {
            string htmlStr = string.Empty;
            if (!string.IsNullOrEmpty(path))
            {
                htmlStr = "<table runat='server' cellpadding='5' cellspacing='5' style=\"width: 100%\">";
                string[] arrStr = path.Split(new string[] { "," }, System.StringSplitOptions.RemoveEmptyEntries);
                for (int i = 0; i < arrStr.Length; i++)
                {
                    if (!string.IsNullOrEmpty(arrStr[i]))
                    {
                        string[] urlArray = arrStr[i].Split('\\');
                        string scanUrl = string.Empty;
                        for (int j = 0; j < urlArray.Length; j++)
                        {
                            scanUrl += urlArray[j] + "|";
                        }
                        string url = rootValue + arrStr[i].Replace('\\', '/');                       
                        string[] subUrl = url.Split('/');
                        string fileName = subUrl[subUrl.Count() - 1];
                        string newFileName = fileName.Substring(fileName.IndexOf("~") + 1);

                        htmlStr += "<tr><td style=\"width: 60%\" align=\"left\"><span style='cursor:pointer;cursor:pointer;cursor:pointer;TEXT-DECORATION: underline;color:blue' onclick=\"window.open('" + url + "')\">" + newFileName + "</span></td>";
                        htmlStr += "<td style=\"width: 40%\" align=\"left\"><a style='cursor:pointer;cursor:pointer;cursor:pointer;TEXT-DECORATION: underline;color:blue' onclick='DelAttachment(" + "\"" + scanUrl + "\"" + ")' >删除</a></td></tr>";
                    }
                }

                htmlStr += "</table>";
            } 
            
            return htmlStr;
        }
        #endregion
       
        #region 附件上传
        /// <summary>
        /// 附件上传
        /// </summary>
        /// <param name="fileUpload">上传控件</param>
        /// <param name="fileUrl">上传路径</param>
        /// <param name="constUrl">定义路径</param>
        /// <returns></returns>
        public static string UploadAttachment(string rootPath, FileUpload fileUpload, string fileUrl, string constUrl)
        {            
            string initFullPath = rootPath + constUrl;
            if (!Directory.Exists(initFullPath))
            {
                Directory.CreateDirectory(initFullPath);
            }

            string filePath = fileUpload.PostedFile.FileName;
            string fileName = Funs.GetNewFileName() + "~" + Path.GetFileName(filePath);
            int count = fileUpload.PostedFile.ContentLength;
            string savePath = constUrl + fileName;
            string fullPath = initFullPath + fileName;          

            if (!File.Exists(fullPath))
            {
                byte[] buffer = new byte[count];
                Stream stream = fileUpload.PostedFile.InputStream;

                stream.Read(buffer, 0, count);
                MemoryStream memoryStream = new MemoryStream(buffer);
                FileStream fs = new FileStream(fullPath, FileMode.Create, FileAccess.Write);
                memoryStream.WriteTo(fs);
                memoryStream.Flush();
                memoryStream.Close();
                fs.Flush();
                fs.Close();
                memoryStream = null;
                fs = null;
                if (!string.IsNullOrEmpty(fileUrl))
                {
                    fileUrl += "," + savePath;
                }
                else
                {
                    fileUrl += savePath;
                }
            }
            else
            {
                fileUrl = string.Empty; 
            }

            return fileUrl;
        }  
        #endregion

        #region 附件删除
        /// <summary>
        ///  附件删除
        /// </summary>
        /// <param name="fileUrl">附件路径</param>
        /// <param name="hiddenUrl">隐藏列路径</param>
        /// <returns></returns>
        public static string DeleteAttachment(string fileUrl, string hiddenUrl)
        {
            string hdAttachUrlStr = hiddenUrl;
            string[] urlArray = hdAttachUrlStr.Split('|');
            string scanUrl = string.Empty;
            for (int j = 0; j < urlArray.Length; j++)
            {
                if (!string.IsNullOrEmpty(urlArray[j]))
                {
                    if (j == 0)
                    {
                        scanUrl += urlArray[j];
                    }
                    else
                    {
                        scanUrl += "\\" + urlArray[j];
                    }
                }
            }

            if (!String.IsNullOrEmpty(fileUrl))
            {
                string[] arrStr = fileUrl.Split(new string[] { "," }, System.StringSplitOptions.RemoveEmptyEntries);
                fileUrl = null;
                for (int i = 0; i < arrStr.Length; i++)
                {
                    if (scanUrl != arrStr[i])
                    {
                        if (i != arrStr.Length - 1)
                        {
                            fileUrl += arrStr[i] + ",";
                        }
                        else
                        {
                            fileUrl += arrStr[i];
                        }
                    }
                }
            }

            return fileUrl;
        }
        #endregion

        #region 附件打开公共方法
        /// <summary>
        /// 显示附件文件
        /// </summary>
        /// <param name="rootValue"></param>
        public static void ShowAttachmentsFile(string rootValue, string path)
        {
            if (!string.IsNullOrEmpty(path))
            {
                string[] arrStr = path.Split(new string[] { "," }, System.StringSplitOptions.RemoveEmptyEntries);
                for (int i = 0; i < arrStr.Length; i++)
                {
                    if (!string.IsNullOrEmpty(arrStr[i]))
                    {
                        string[] urlArray = arrStr[i].Split('\\');
                        string scanUrl = string.Empty;
                        for (int j = 0; j < urlArray.Length; j++)
                        {
                            scanUrl += urlArray[j] + "|";
                        }
                        string url = rootValue + arrStr[i].Replace('\\', '/');
                        System.Web.HttpContext.Current.Response.Write("<script type='text/javascript' language='javascript'>window.open('" + url + "')</script>");
                    }
                }
            }
        }
        #endregion       

        #region 附件在Image中显示
        /// <summary>
        /// 附件在Image中显示
        /// </summary>
        /// <param name="rootValue">文件夹路径</param>
        /// <param name="path">附件路径</param>
        /// <returns>附件显示HTML</returns>
        public static string ShowImage(string rootValue, string path)
        {
            string htmlStr = string.Empty;
            if (!string.IsNullOrEmpty(path))
            {
                htmlStr = "<table runat='server' cellpadding='5' cellspacing='5' style=\"width: 100%\">";
                string[] arrStr = path.Split(new string[] { "," }, System.StringSplitOptions.RemoveEmptyEntries);
                for (int i = 0; i < arrStr.Length; i++)
                {
                    if (!string.IsNullOrEmpty(arrStr[i]))
                    {
                        string[] urlArray = arrStr[i].Split('\\');
                        string scanUrl = string.Empty;
                        for (int j = 0; j < urlArray.Length; j++)
                        {
                            scanUrl += urlArray[j] + "|";
                        }

                        string url = rootValue + arrStr[i].Replace('\\', '/');
                        string[] subUrl = url.Split('/');
                        string fileName = subUrl[subUrl.Count() - 1];
                        string newFileName = fileName.Substring(fileName.IndexOf("~") + 1);

                        htmlStr += "<tr><td style=\"width: 60%\" align=\"left\"><img width='100' height='100' src='" + url + "'></img></td>";
                    }
                }

                htmlStr += "</table>";
            }

            return htmlStr;
        }
        #endregion
    }
}