页面修改

Edu.Common/Plugin/IImageHelper.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Drawing;
 using System.Drawing.Imaging;
 using System.IO;
+using System.Net;
 
 namespace Edu.Common.Plugin
 {
@@ -11,12 +12,15 @@ namespace Edu.Common.Plugin
     /// </summary>
     public class ImageHelper
     {
-        /// <summary>
-        /// 生成图片
-        /// </summary>
-        /// <param name="sourceFile">源文件地址</param>
-        /// <param name="targetFile">目标文件路径</param>
-        /// <returns></returns>
+
+        /**
+         *  生成图片
+         *  string targetFile = @"F:/Test/temp/";
+         *  ImageHelper.CreateImage("F:/Test/1.docx", targetFile);
+         *  ImageHelper.CreateImage("F:/Test/2.pdf", targetFile);
+         *  ImageHelper.CreateImage("F:/Test/3.ppt", targetFile);
+         *  ImageHelper.CreateImage("F:/Test/4.xls", targetFile);
+         */
         public static List<string> CreateImage(string sourceFile, string targetFile)
         {
             IImageHelper imageHelper = null;
@@ -48,6 +52,38 @@ namespace Edu.Common.Plugin
             }
             return imageHelper.CreateImage(sourceFile, targetFile);
         }
+
+        /// <summary>
+        /// 生成图片
+        /// </summary>
+        /// <param name="url"></param>
+        public static void CreateImage(string url)
+        {
+            string tempPath =Common.Config.GetFileUrl(url);
+            string path = Environment.CurrentDirectory + tempPath;//下载到的地址+文件名                                   
+            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
+            //发送请求并获取相应回应数据
+            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
+            //直到request.GetResponse()程序才开始向目标网页发送Post请求
+            Stream responseStream = response.GetResponseStream();
+            string newFilePath = path.Substring(0, path.LastIndexOf("/"));
+            if (!System.IO.Directory.Exists(newFilePath))//如果不存在就创建file文件夹
+            {
+                System.IO.Directory.CreateDirectory(newFilePath);
+            }
+            //创建本地文件写入流
+            Stream stream = new FileStream(path, FileMode.Create);
+            byte[] bArr = new byte[1024];
+            int size = responseStream.Read(bArr, 0, (int)bArr.Length);
+            while (size > 0)
+            {
+                stream.Write(bArr, 0, size);
+                size = responseStream.Read(bArr, 0, (int)bArr.Length);
+            }
+            stream.Close();
+            responseStream.Close();
+        }
+
     }
 
     /// <summary>
@@ -60,8 +96,9 @@ namespace Edu.Common.Plugin
         /// </summary>
         /// <param name="sourceFile">源文件地址</param>
         /// <param name="targetFile">目标文件路径</param>
+        /// <param name="prefix">生成文件前缀</param>
         /// <returns></returns>
-        List<string> CreateImage(string sourceFile, string targetFile);
+        List<string> CreateImage(string sourceFile, string targetFile, string prefix = "");
     }
 
     /// <summary>
@@ -74,8 +111,9 @@ namespace Edu.Common.Plugin
         /// </summary>
         /// <param name="sourceFile">源文件地址</param>
         /// <param name="targetFile">目标文件路径</param>
+        /// <param name="prefix">生成文件前缀</param>
         /// <returns></returns>
-        public List<string> CreateImage(string sourceFile, string targetFile)
+        public List<string> CreateImage(string sourceFile, string targetFile, string prefix = "")
         {
             List<string> list = new List<string>();
             try
@@ -84,7 +122,7 @@ namespace Edu.Common.Plugin
                 xls.LoadFromFile(sourceFile, Spire.Xls.ExcelVersion.Version97to2003);
                 string tempPdf = targetFile + "xls_temp_" + DateTime.Now.Ticks + ".pdf";
                 xls.SaveToFile(tempPdf, Spire.Xls.FileFormat.PDF);
-                list = new PdfToImage().CreateImage(tempPdf, targetFile);
+                list = new PdfToImage().CreateImage(tempPdf, targetFile, prefix: "xls_");
                 File.Delete(tempPdf);
             }
             catch (Exception ex)
@@ -105,8 +143,9 @@ namespace Edu.Common.Plugin
         /// </summary>
         /// <param name="sourceFile">源文件地址</param>
         /// <param name="targetFile">目标文件路径</param>
+        /// <param name="prefix">生成文件前缀</param>
         /// <returns></returns>
-        public List<string> CreateImage(string sourceFile, string targetFile)
+        public List<string> CreateImage(string sourceFile, string targetFile, string prefix = "")
         {
             List<string> list = new List<string>();
             try
@@ -143,23 +182,24 @@ namespace Edu.Common.Plugin
         /// 生成图片地址
         /// </summary>
         /// <param name="sourceFile">源文件地址</param>
-        /// <param name="targetFile">目标文件路径</param>>
+        /// <param name="targetFile">目标文件路径</param>
+        /// <param name="prefix">生成文件前缀</param>
         /// <returns></returns>
-        public List<string> CreateImage(string sourceFile, string targetFile)
+        public List<string> CreateImage(string sourceFile, string targetFile, string prefix = "")
         {
             List<string> list = new List<string>();
             string license = AppContext.BaseDirectory + @"ExtPlug\Aspose.Total.lic";
             try
             {
+                //加载证书
                 Aspose.Pdf.License license2 = new Aspose.Pdf.License();
                 license2.SetLicense(license);
                 Aspose.Pdf.Document document = new Aspose.Pdf.Document(sourceFile);
-                //默认质量为100，设置质量的好坏与处理速度不成正比，甚至是设置的质量越低反而花的时间越长，怀疑处理过程是先生成高质量的再压缩
                 var device = new Aspose.Pdf.Devices.PngDevice();
                 //遍历每一页转为PNG
                 for (var i = 1; i <= document.Pages.Count; i++)
                 {
-                    string filePathOutPut = targetFile + "pdf_" + i + "_" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".png";
+                    string filePathOutPut = targetFile + (!string.IsNullOrWhiteSpace(prefix) ? prefix : "pdf_") + i + "_" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".png";
                     FileStream fs = new FileStream(filePathOutPut, FileMode.OpenOrCreate);
                     try
                     {
@@ -192,8 +232,9 @@ namespace Edu.Common.Plugin
         /// </summary>
         /// <param name="sourceFile">源文件地址</param>
         /// <param name="targetFile">目标文件路径</param>
+        /// <param name="prefix">生成文件前缀</param>
         /// <returns></returns>
-        public List<string> CreateImage(string sourceFile, string targetFile)
+        public List<string> CreateImage(string sourceFile, string targetFile, string prefix = "")
         {
             List<string> list = new List<string>();
             try
@@ -204,8 +245,9 @@ namespace Edu.Common.Plugin
                 for (int i = 0; i < ppt.Slides.Count; i++)
                 {
                     string newFilePath = string.Format(targetFile + "ppt_" + i + "_" + @"{0}.png", DateTime.Now.ToString("yyyyMMddHHmmssfff"));
-                    Image image = ppt.Slides[i].SaveAsImage();//读取emf格式图片
-                    image.Save(newFilePath, ImageFormat.Png);//把emf格式的图片转换成Png格式
+                    //保存为PNG图片
+                    Image image = ppt.Slides[i].SaveAsImage();
+                    image.Save(newFilePath, ImageFormat.Png);
                     list.Add(newFilePath);
                 }
                 ppt.Dispose();

Edu.WebApi/Controllers/Course/CourseController.cs

@@ -82,11 +82,11 @@ namespace Edu.WebApi.Controllers.Course
             var cateIds= base.ParmJObj.GetStringValue("cateIds");
              
             var list = categoryModule.GetChildCategoryStringModule(cateIds);
-            string targetFile = @"F:/Test/temp/";
+            //string targetFile = @"F:/Test/temp/";
             //ImageHelper.CreateImage("F:/Test/1.docx", targetFile);
             //ImageHelper.CreateImage("F:/Test/2.pdf", targetFile);
             //ImageHelper.CreateImage("F:/Test/3.ppt", targetFile);
-            ImageHelper.CreateImage("F:/Test/4.xls", targetFile);
+            //ImageHelper.CreateImage("F:/Test/4.xls", targetFile);
             return ApiResult.Success(data: list);
         }