c# 预览服务器文件

后台

using Aspose.Cells;
using Aspose.Slides.Pptx;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Web.Http;

namespace DocOnlineView.UI.Controllers.MVCAPI
{
public class HomeController : ApiController
{
[HttpGet]
public DataTable CourseViewOnLine(string sourceDoc, string fileName)
{
DataTable dtlist = new DataTable();
dtlist.Columns.Add("TempDocHtml", typeof(string));

string fileDire = "/Files";
//string sourceDoc = Path.Combine(fileDire, fileName);
string saveDoc = "";

string docExtendName = System.IO.Path.GetExtension(sourceDoc).ToLower();
if (docExtendName == ".jpg" || docExtendName == ".png" || docExtendName == ".bmp" || docExtendName == ".gif")
{
string path = System.Web.HttpContext.Current.Server.MapPath("文档" + docExtendName + "");
downFile(sourceDoc);
string p = path;
int cou = path.Substring(0, path.IndexOf("DocOnlineView.UI")).Length;
p = p.Substring(cou + 16, p.Length - cou - 16);
p = p.Replace("\", "/");
//DataRow dr = new DataRow();
//dr["TempDocHtml"] = p;
dtlist.Rows.Add(p);
}
else
{
bool result = false;
if (docExtendName == ".pdf")
{
//pdf模板文件
string tempFile = Path.Combine(fileDire, "temppdf.html");
saveDoc = Path.Combine(fileDire, "viewFiles/onlinepdf.html");
result = PdfToHtml(
sourceDoc,
System.Web.HttpContext.Current.Server.MapPath(tempFile),
System.Web.HttpContext.Current.Server.MapPath(saveDoc), fileName);
}
else if (docExtendName == ".txt")
{
//txt模板文件
string tempFile = Path.Combine(fileDire, "temptxt.html");
saveDoc = Path.Combine(fileDire, "viewFiles/onlinetxt.html");
result = PdfToHtmlTXT(
sourceDoc,
System.Web.HttpContext.Current.Server.MapPath(tempFile),
System.Web.HttpContext.Current.Server.MapPath(saveDoc), fileName);
}
else
{
saveDoc = Path.Combine(fileDire, "viewFiles/onlineview.html");
result = OfficeDocumentToHtml(
sourceDoc,
System.Web.HttpContext.Current.Server.MapPath(saveDoc));
}

if (result)
{
dtlist.Rows.Add(saveDoc);
}
}

return dtlist;
}

//方法
long totalDownloadedByte = 0;
long logbyte = 0;
private bool OfficeDocumentToHtml(string sourceDoc, string saveDoc)
{
bool result = false;
//获取文件扩展名
string docExtendName = System.IO.Path.GetExtension(sourceDoc).ToLower();
string path = System.Web.HttpContext.Current.Server.MapPath("文档" + docExtendName + "");
downFile(sourceDoc);
switch (docExtendName)
{
case ".doc":
case ".docx":
Aspose.Words.Document doc = new Aspose.Words.Document(path);
doc.Save(saveDoc, Aspose.Words.SaveFormat.Html);
result = true;
break;
case ".xls":
case ".xlsx":
Workbook workbook = new Workbook(path);
workbook.Save(saveDoc, SaveFormat.Html);

result = true;
break;
case ".ppt":
case ".pptx":
PresentationEx pres = new PresentationEx(path);
pres.Save(saveDoc, Aspose.Slides.Export.SaveFormat.Html);
result = true;
break;
default:
break;
}
System.IO.File.Delete(path);
return result;
}

/// <summary>
/// txt预览
/// </summary>
/// <param name="sourceDoc"></param>
/// <param name="tempFile"></param>
/// <param name="saveDoc"></param>
/// <param name="fileName"></param>
/// <returns></returns>
private bool PdfToHtmlTXT(string sourceDoc, string tempFile, string saveDoc, string fileName)
{
//获取文件扩展名
string docExtendName = System.IO.Path.GetExtension(sourceDoc).ToLower();
string path = System.Web.HttpContext.Current.Server.MapPath("文档" + docExtendName + "");
downFile(sourceDoc);
byte[] b = new byte[1024 * 1024];
FileStream fileRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read);
int r = fileRead.Read(b, 0, b.Length);
string contents = Encoding.Default.GetString(b, 0, r);

//---------------------读html模板页面到stringbuilder对象里----
StringBuilder htmltext = new StringBuilder();
using (StreamReader sr = new StreamReader(tempFile)) //模板页路径
{
String line;
while ((line = sr.ReadLine()) != null)
{
htmltext.Append(line);
}
sr.Close();
sr.Dispose();
}
fileRead.Close();
fileRead.Dispose();
path = path.Replace("\", "/");
//----------替换htm里的标记为你想加的内容
htmltext.Replace("$PDFFILEPATH", contents);

//----------生成htm文件------------------――
using (StreamWriter sw = new StreamWriter(saveDoc, false,
System.Text.Encoding.GetEncoding("utf-8"))) //保存地址
{
sw.WriteLine(htmltext);
sw.Flush();
sw.Close();
sw.Dispose();

}
System.IO.File.Delete(path);
return true;
}
/// <summary>
/// 文件下载
/// </summary>
/// <param name="sourceDoc"></param>
public void downFile(string sourceDoc)
{
//获取文件扩展名
string docExtendName = System.IO.Path.GetExtension(sourceDoc).ToLower();
string log = "";
System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(sourceDoc);
System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse();
long totalBytes = myrp.ContentLength;
System.IO.Stream st = myrp.GetResponseStream();
string path = System.Web.HttpContext.Current.Server.MapPath("文档" + docExtendName + "");
System.IO.Stream so = new System.IO.FileStream(path, System.IO.FileMode.Create);
totalDownloadedByte = 0;
byte[] by = new byte[1024];
int osize = st.Read(by, 0, (int)by.Length);
DateTime dt1 = DateTime.Now;
int k = 0;
while (osize > 0)
{
if (k > 10)
{
totalDownloadedByte = 0;
logbyte = 0;

break;
}
DateTime dt2 = DateTime.Now;
if ((dt2 - dt1).Seconds > 1)
{
dt1 = dt2;
log += "下载速度" + ((totalDownloadedByte - logbyte) / 1024).ToString("0") + "KB ";
logbyte = totalDownloadedByte;
k++;
}
totalDownloadedByte = osize + totalDownloadedByte;
so.Write(by, 0, osize);
osize = st.Read(by, 0, (int)by.Length);
}
so.Close();
so.Dispose();
st.Close();
st.Dispose();
}

private bool PdfToHtml(string sourceDoc, string tempFile, string saveDoc, string fileName)
{
//获取文件扩展名
string docExtendName = System.IO.Path.GetExtension(sourceDoc).ToLower();
string path = System.Web.HttpContext.Current.Server.MapPath("文档" + docExtendName + "");
downFile(sourceDoc);
//---------------------读html模板页面到stringbuilder对象里----
StringBuilder htmltext = new StringBuilder();
using (StreamReader sr = new StreamReader(tempFile)) //模板页路径
{
String line;
while ((line = sr.ReadLine()) != null)
{
htmltext.Append(line);
}
sr.Close();
sr.Dispose();
}
string p = path;
int cou = path.Substring(0, path.IndexOf("DocOnlineView.UI")).Length;
p = p.Substring(cou + 16, p.Length - cou - 16);
p = p.Replace("\", "/");
//----------替换htm里的标记为你想加的内容
htmltext.Replace("$PDFFILEPATH", p);

}
//System.IO.File.Delete(path);
return true;
}
}
}

前台使用弹窗

//在线预览开始

$(function () {
//SexyLightbox.initialize({ color: 'white' });
});

//sourceDoc：服务器路径 fileName：文件名称

var viewDoc = function (sourceDoc,fileName) {
showLoading("body", "正在生成预览");

//生成html文件
$.ajax({
url: "api/Home/CourseViewOnLine?fileName=" + fileName + "&sourceDoc=" + sourceDoc,
type: "GET",
dataType: "json",
success: function (data) {
closeLoading();

//alert(JSON.stringify(data));
var diag = new Dialog();
diag.Width = 900;
diag.Height = 400;
diag.Title = "内容页为外部连接的窗口";
alert(data[0].TempDocHtml);
diag.URL = "http://localhost:8640/" + data[0].TempDocHtml + "?ver=" + Math.random() * 10;
diag.show();

//$("#hidePopupDialog").attr('href', '' + data[0].TempDocHtml + '?TB_iframe=true&height=450&width=920');
//$("#hidePopupDialog").click();
},
error: function () {
closeLoading();
alert('生成失败');
}
});
}

// 加载遮罩
var showLoading = function (elementTag, message) {
var msg = message ? message : "加载数据，请稍候...";
$("<div class="datagrid-mask"></div>").css({
display: "block", "100%",
height: $(elementTag).height()
}).appendTo(elementTag);
$("<div class="datagrid-mask-msg"></div>")
.html(msg)
.appendTo(elementTag).css({ display: "block", left: "30%", top: ($(elementTag).height() - 45) / 2 });
};

//关闭遮罩
var closeLoading = function () {
$('.datagrid-mask').remove();
$('.datagrid-mask-msg').remove();
};

//在线预览结束

再三须慎意，第一莫欺心