最后，我无法修改控件中的预览功能。
但是，我在完成后上传的项目的第二次渲染中实现了一些自定义。
它看起来比以前更好。为了实现这一点，我修改了
public ActionResult GetThumbnailFile(string folderServerPath,string name, bool thumbnail = false)
{
var file = GetFile(name, folderServerPath);
var contentType = MimeMapping.GetMimeMapping(file.Name);
return thumbnail ? Thumb(file, contentType) : File(file.FullName, contentType);
}
private ActionResult Thumb(FileInfo file, string contentType)
{
if (contentType.StartsWith("image"))
{
try
{
using (var img = Image.FromFile(file.FullName))
{
var thumbHeight = (int)(img.Height * (ThumbSize / (double)img.Width));
using (var thumb = img.GetThumbnailImage(ThumbSize, thumbHeight, () => false, IntPtr.Zero))
{
var ms = new MemoryStream();
thumb.Save(ms, img.RawFormat);
ms.Position = 0;
return File(ms, contentType);
}
}
}
catch (Exception ex)
{
// todo log exception
}
}
else
{
switch (file.Extension.ToUpperInvariant())
{
case ".LOG":
return File("~/Images/general_documents_preview/txt-icon-128.png", contentType);
case ".PDF":
return File("~/Images/general_documents_preview/pdf-icon-128.png", contentType);
case "JPEG":
//icon = "JPEG-File-icon-128.png";
break;
case "JPG":
//icon = "JPEG-File-icon-128.png";
break;
case "WBMP":
//icon = "Illustrator-File-icon128.png";
break;
case "BMP":
//icon = "BMP-File-icon-128.png";
break;
case "TIF":
//icon = "Web-File-icon-128.png";
break;
case "JP2":
//icon = "Vector-File-icon-128.png";
break;
case "JBIG2":
//icon = "Vector-File-icon-128.png";
break;
case "EMF":
//icon = "Photoshop-File-icon-128.png";
break;
case "GIF":
//icon = "GIF-File-icon-128.png";
break;
case "PNG":
//icon = "PNG-File-icon-128.png";
break;
case "TXT":
return File("~/Images/general_documents_preview/txt-icon-128.png", contentType);
case ".DOC":
return File("~/Images/general_documents_preview/doc-icon-128.png", contentType);
//icon = "doc-icon-128.png";
case ".DOCX":
return File("~/Images/general_documents_preview/docx-icon-128.png", contentType);
//icon = "docx-icon-128.png";
case ".PST":
return File("~/Images/general_documents_preview/pst-icon-128.png", contentType);
//icon = "pst-icon-128.png";
case ".PPT":
return File("~/Images/general_documents_preview/ppt-icon-128.png", contentType);
//icon = "ppt-icon-128.png";
case ".PPTX":
return File("~/Images/general_documents_preview/pptx-icon-128.png", contentType);
//icon = "pptx-icon-128.png";
case ".HTML":
return File("~/Images/general_documents_preview/html-icon-128.png", contentType);
//icon = "html-icon-128.png";
case ".RTF":
return File("~/Images/general_documents_preview/rtf-icon-128.png", contentType);
//icon = "rtf-icon-128.png";
case ".DLL":
return File("~/Images/general_documents_preview/dll-icon-128.png", contentType);
//icon = "dll-icon-128.png";
case "EML":
//icon = "eml-icon-128.png";
break;
case ".FLA":
return File("~/Images/general_documents_preview/fla-icon-128.png", contentType);
case ".SWF":
return File("~/Images/general_documents_preview/fla-icon-128.png", contentType);
//icon = "fla-icon-128.png";
case ".MP3":
return File("~/Images/general_documents_preview/mp3-icon-128.png", contentType);
case ".XLS":
return File("~/Images/general_documents_preview/xls-icon-128.png", contentType);
//icon = "xls-icon-128.png";
case ".XLSX":
return File("~/Images/general_documents_preview/xlsx-icon-128.png", contentType);
//icon = "xlsx-icon-128.png";
default://unknow
return File("~/Images/general_documents_preview/bin-icon-128.png", contentType);
}
}
return Redirect($"https://placehold.it/{ThumbSize}?text={Url.Encode(file.Extension)}");
}
您可以检查从下载原始示例项目的更改
https://github.com/ronnieoverby/blue-imp-upload-aspnet-mvc/tree/master/src/jquploadz