C#将PPT文件转换成图片并轮播展示_c# ppt转图片-优快云博客

本文链接：https://blog.youkuaiyun.com/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;
        }
    }   
}

以上代码实现的是看板抓取指定文件夹中的图片Show到电视看板上

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"  οnclick="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！