版权声明： https://blog.csdn.net/Bibabu135766/article/details/79480701
本人小白一个,初次接触C#,各位大神还请多多点出不足,谢谢！
项目需求是:User将PPT文件上传后,公司大厅电视看板内容随即改变为上传PPT文件内容,并进行轮播显示
思路：1,实现将PPT文件打开并转换成图片保存
2,每次PPT文件内容大小不定,即转换成图片数量不定
3,转换成的图片名称不可一致,因为浏览器具有缓存功能
废话不说,上代码：
aspx代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="One.aspx.cs" Inherits="First" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="refresh" content="5">
<title></title>
<style type="text/css">
html,body
{
height:100%;
width:100%;
margin:0px;
padding:0px;
}
#maindiv
{
height:100%;
width:100%;
margin:0px;
padding:0px;
}
</style>//电视看板当然需要全屏显示,所以需要进行自适应设置
<script type="text/javascript">
window.onload = function () {
var table = document.getElementById('table');
table.style.width = document.documentElement.clientWidth + 'px';
table.style.height = document.documentElement.clientHeight + 'px';
}
</script>
</head>
<body overflow:-Scroll;overflow-y:hidden;overflow-x:hidden>
<form id="form1" runat="server">
<div id="table">
<div runat ="server" id ="maindiv" style =" border-width:0px;"/>
</div>
</form>
</body>
</html>
后台代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Security;
using System.Timers;
using System.Threading;
using System.IO;
public partial class First : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
DirectoryInfo dirInfo = new DirectoryInfo(System.AppDomain.CurrentDomain.BaseDirectory + "1Img\\");
FileInfo[] files = dirInfo.GetFiles();
int length = files.Length;
//获取文件间中的文件数量
if (Session["f"] == null)
{
Session["f"] = 0;
}
//创建image控件
Session["f"] = int.Parse(Session["f"].ToString()) + 1;
this.maindiv.Controls.Clear();
Image image = new Image();
foreach (var file in files)
image.ImageUrl = "1Img/" + file.ToString().Substring(0, 17) + Session["f"].ToString() + ".png";
image.ID = "" + Session["f"].ToString() + "image";
image.Style["width"] = "100%";
image.Style["height"] = "100%";
this.maindiv.Controls.Add(image);
if (int.Parse(Session["f"].ToString()) >= length)
{
Session["f"] = 0;
}
}
}下面代码为将上传的PPT文件转换成图片保存如指定文件中：
aspx代码：
(引用<iframe>标签,方便User上传文件后,可以直接在当前页面看到上传后的内容是否正确)
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Maintain.aspx.cs" Inherits="Maintain" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="refresh" content="30">
<title>Maintain</title>
<style type="text/css">
body,html,div{
margin: 0px;
padding:0px;
}
#all,span{
width: 90%;
height: 90%;
padding:5% 5% 0 5%;
}
iframe{
width:32%;
}
#form1
{
}
</style>
<script type="text/javascript">
window.onload = function () {
var href = window.location.href.toString();
var The = href.charAt(11);
if (The == '9') {
this.location.href = 'http://10.99.106.8:8080';
}
else {
this.location.href = 'http://172.31.48.8:8080';
}
console.log(href)
}
</script>
</head>
<body>
<form action="" method="post" runat="server">
<div id="all">
<iframe src="http://10.99.106.211/WYF/One.aspx" frameborder="0" height="270px" ></iframe>
<iframe src="http://10.99.106.211/WYF/Two.aspx" frameborder="0" height="270px" ></iframe>
<iframe src="http://10.99.106.211/WYF/Three.aspx" frameborder="0" height="270px" ></iframe>
<iframe src="http://10.99.106.211/WYF/Four.aspx" frameborder="0" height="270px" ></iframe>
<iframe src="http://10.99.106.211/WYF/Five.aspx" frameborder="0" height="270px" ></iframe>
<iframe src="http://10.99.106.211/WYF/Six.aspx" frameborder="0" height="270px" ></iframe>
</div>
<div align="center">
<asp:FileUpload ID="FileUpload1" runat="server" BorderColor="#FF3399" Font-Size="20px"/>
<asp:Button ID="Button1" runat="server" Text="上传" onclick="Button1_Click"
style="width:100px;height:40px" Font-Size="20px"/>
<asp:Label ID="Label1" runat="server" Font-Size="20px" ForeColor="Red" Text=""></asp:Label>
</div>
</form>
</body>
</html>
后台代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Threading;
using System.IO;
public partial class Maintain : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
string path = System.AppDomain.CurrentDomain.BaseDirectory + "Img\\";
if (!(FileUpload1.FileName.EndsWith(".pptx") || FileUpload1.FileName.EndsWith(".PPTX")))
{
Label1.Text = "上传文件只能是png格式，请重新上传！";
return;
}
//截取上传的文件名
string filename = FileUpload1.FileName;
string File = filename.Substring(0, 1);
//上传之前删除指定该文件中的文件:
DirectoryInfo dirInfo = new DirectoryInfo(System.AppDomain.CurrentDomain.BaseDirectory + "" + File + "Img\\");
FileInfo[] files = dirInfo.GetFiles();
// 获取该目录下的所有文件
foreach (FileInfo file in files) {
file.Delete();
}
//将上传文件保存至指定文件夹中
FileUpload1.SaveAs(Server.MapPath("~/Img/") + FileUpload1.FileName);
Label1.Text = "上传成功！";
//将上传的文件转换成图片
string pptPath = System.AppDomain.CurrentDomain.BaseDirectory + "Img\\" + File + ".pptx";//PPT文件的路径
string imgPath = System.AppDomain.CurrentDomain.BaseDirectory + "" + File + "Img\\";//转换成图片保存的路径
Thread.Sleep(2000);
var app = new Microsoft.Office.Interop.PowerPoint.Application();
var ppt = app.Presentations.Open(pptPath, Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoFalse);
var index = 0;
var fileName = System.IO.Path.GetFileNameWithoutExtension(pptPath);
foreach (Microsoft.Office.Interop.PowerPoint.Slide slid in ppt.Slides)
{
++index;
slid.Export(imgPath + string.Format(DateTime.Now.ToString("yyyy-MM-dd") +"{0}.png", index.ToString()), "png", 1024, 768);
}
//释放资源
ppt.Close();
app.Quit();
GC.Collect();
}
else {
Label1.Text = "未上传文件,请确认！！";
return;
}
}
}本地运行后,不出意外,应该可以成功,但当发布到IIS上后,可能会出现报错：PPT文件无法打开
这个问题搞了好久,百度了很多,添加什么引用啊什么都无效,最后更换其他服务进行发布,最后成功了！