如何显示我在数据库中上传的pdf和doc文件的缩略图. [英] How do I display thumbnail of pdf and doc file which I have uploaded in database.
本文介绍了如何显示我在数据库中上传的pdf和doc文件的缩略图.的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
您好,我遇到的情况是我正在数据库中上载每种类型的文件,并在视图中显示相关的图标,但是我想在显示图像文件的图像时显示每个文件的缩略图.
请建议我如何显示doc,pdf,xlsx或任何文件格式的缩略图.
我尝试过的事情:
这是我用来上传每个文件的方法.
Hi, I have a situation where i am uploading every type of file in the database and displaying related icons in the view, But i want to display Thumbnail of each file as i am displaying the image for the image file.
please suggest me how I''ll show a thumbnail for doc, pdf, xlsx, or any file format.
What I have tried:
Here is method which i am using to upload every file.
[HttpPost]
public ActionResult UploadResources(HttpPostedFileBase[] files)
{
if (ModelState.IsValid && Request.Form["SelectedSubCategoryId"] != null && Request.Form["SelectedCategoryId"] != null)
{
string result = string.Empty;
if (files != null && files.Length > 0 && files[0] !=null )
{
string[] results = new string[files.Length];
int i = 0;
foreach (HttpPostedFileBase file in files)
{
string ext = string.Empty;
string fileName = file.FileName;
int fileExtPos = fileName.LastIndexOf(".");
if (fileExtPos >= 0)
ext = fileName.Substring(fileExtPos, (fileName.Length - fileExtPos));
results[i] = dat.UploadResources(Convert.ToInt32(Request.Form["SelectedCategoryId"]), Convert.ToInt32(Request.Form["SelectedSubCategoryId"]), Convert.ToString(Request.Form["Description"]), WebSecurity.CurrentUserId, Convert.ToBoolean(Request.Form["IsDisplay"]), Convert.ToString(Request.Form["YoutubeURL"]), file.FileName, ext, file.InputStream);
i++;
}
if (results.Any(m => m == "1"))
{
string Upfilenames = string.Empty;
string Npfilenames = string.Empty;
int m = 0;
foreach (string s in results)
{
if (s == "1")
{
Upfilenames += files[m].FileName + ",";
}
else
{
Npfilenames += files[m].FileName + ",";
}
m++;
}
TempData["Message"] = "Success:" + Upfilenames + "were uploaded.";
}
if (results.Any(m => m == "-2"))
{
TempData["Message"] = "Danger: File not uploaded, Please try again.";
}
//else
//{
// TempData["Message"] = "Success: All files were uploaded.";
//}
}
else if (Request.Form["YoutubeURL"] != null)
{
result = dat.UploadResources(Convert.ToInt32(Request.Form["SelectedCategoryId"]), Convert.ToInt32(Request.Form["SelectedSubCategoryId"]), Convert.ToString(Request.Form["Description"]), WebSecurity.CurrentUserId, Convert.ToBoolean(Request.Form["IsDisplay"]), Convert.ToString(Request.Form["YoutubeURL"]), null, null, null);
if (result == "1")
{
TempData["Message"] = "Success: Resource uploaded.";
}
else if (result == "-2")
{
TempData["Message"] = "Danger: Resource not uploaded, Please try again.";
}
}
}
return RedirectToAction("UploadResources");
}
和
and
#region UploadResources
public string UploadResources(int CategoryId, int SubCategoryId, string Description, int AdminId,bool IsDisplay ,string YoutubeURL = null,string FileName = null, string fileExt = null, Stream Media = null)
{
string RetValue = string.Empty;
string ProcedureName =string.Empty;
string ReturnValue = string.Empty;
string regex = "^(?:https?\\:\\/\\/)?(?:www\\.)?(?:youtu\\.be\\/|youtube\\.com\\/(?:embed\\/|v\\/|watch\\?v\\=))([\\w-]{10,12})(?:$|\\&|\\?\\#).*";
string YoutubeID = string.Empty;
if(YoutubeURL != null)
{
YoutubeID = new Regex(regex).Match(YoutubeURL).Groups[1].Value;
}
ProcedureName = "BP_UPLOAD_RESOURCE";
using (con = new SqlConnection(constrBrandpier))
{
try
{
con.Open();
SqlCommand cmd = new SqlCommand(ProcedureName, con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@CATEGORY_ID", CategoryId);
cmd.Parameters.AddWithValue("@SUB_CATEGORY_ID", SubCategoryId);
cmd.Parameters.AddWithValue("@FILENAME", FileName);
cmd.Parameters.AddWithValue("@FILEEXT", fileExt);
cmd.Parameters.AddWithValue("@DESCRIPTION", Description);
cmd.Parameters.AddWithValue("@ADMINID", AdminId);
cmd.Parameters.AddWithValue("@YOUTUBE_URL", YoutubeURL);
cmd.Parameters.AddWithValue("@YOUTUBE_ID", YoutubeID);
cmd.Parameters.Add(new SqlParameter("@ISDISPLAY", SqlDbType.Char)).Value = IsDisplay ? ''1'' : ''0'';
SqlParameter IMAGEID = new SqlParameter();
IMAGEID = cmd.Parameters.Add("@IMAGEID", SqlDbType.NVarChar, 300);
IMAGEID.Direction = ParameterDirection.Output;
SqlParameter intReturn = new SqlParameter();
intReturn = cmd.Parameters.Add("@INTRETURN", SqlDbType.Int);
intReturn.Direction = ParameterDirection.Output;
cmd.ExecuteScalar();
RetValue = intReturn.Value.ToString();
if (intReturn.Value.ToString() == "1" && FileName != null)
{
string _bucketpath = ConfigurationManager.AppSettings["bucketName"].ToString() + ConfigurationManager.AppSettings["ResourcebucketName"].ToString() + CategoryId.ToString() + "/" + SubCategoryId.ToString();
BWS.AWS.S3 s3 = new BWS.AWS.S3();
string _returns3 = s3.UploadFile(_bucketpath, IMAGEID.Value.ToString(), ReadFully(Media));
}
}
catch (Exception ex)
{
RetValue = ex.Message.ToString();
}
}
return RetValue;
}
推荐答案
| \\& | \\?\\#).*; 字符串YoutubeID = string.Empty; if(YoutubeURL!= null) { YoutubeID =新的Regex(regex).Match(YoutubeURL).Groups [1] .Value; } ProcedureName ="BP_UPLOAD_RESOURCE"; 使用(con = new SqlConnection(constrBrandpier)) { 尝试 { con.Open(); SqlCommand cmd =新的SqlCommand(ProcedureName,con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@ CATEGORY_ID",CategoryId); cmd.Parameters.AddWithValue("@ SUB_CATEGORY_ID",SubCategoryId); cmd.Parameters.AddWithValue("@ FILENAME",FileName); cmd.Parameters.AddWithValue("@ FILEEXT",fileExt); cmd.Parameters.AddWithValue("@ DESCRIPTION",Description); cmd.Parameters.AddWithValue("@ ADMINID",AdminId); cmd.Parameters.AddWithValue("@ YOUTUBE_URL",YoutubeURL); cmd.Parameters.AddWithValue("@ YOUTUBE_ID",YoutubeID); cmd.Parameters.Add(新SqlParameter("@ ISDISPLAY",SqlDbType.Char)).Value = IsDisplay吗? ``1'':``0''; SqlParameter IMAGEID =新的SqlParameter(); IMAGEID = cmd.Parameters.Add("@ IMAGEID",SqlDbType.NVarChar,300); IMAGEID.Direction = ParameterDirection.Output; SqlParameter intReturn =新的SqlParameter(); intReturn = cmd.Parameters.Add("@ INTRETURN",SqlDbType.Int); intReturn.Direction = ParameterDirection.Output; cmd.ExecuteScalar(); RetValue = intReturn.Value.ToString(); 如果(intReturn.Value.ToString()=="1"&& FileName!= null) { 字符串_bucketpath = ConfigurationManager.AppSettings ["bucketName"].ToString()+ ConfigurationManager.AppSettings ["ResourcebucketName"].ToString()+ CategoryId.ToString()+"/" + SubCategoryId.ToString(); BWS.AWS.S3 s3 =新的BWS.AWS.S3(); 字符串_returns3 = s3.UploadFile(_bucketpath,IMAGEID.Value.ToString(),ReadFully(Media)); } } 抓住(前例外) { RetValue = ex.Message.ToString(); } } 返回RetValue; }
|\\&|\\?\\#).*"; string YoutubeID = string.Empty; if(YoutubeURL != null) { YoutubeID = new Regex(regex).Match(YoutubeURL).Groups[1].Value; } ProcedureName = "BP_UPLOAD_RESOURCE"; using (con = new SqlConnection(constrBrandpier)) { try { con.Open(); SqlCommand cmd = new SqlCommand(ProcedureName, con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@CATEGORY_ID", CategoryId); cmd.Parameters.AddWithValue("@SUB_CATEGORY_ID", SubCategoryId); cmd.Parameters.AddWithValue("@FILENAME", FileName); cmd.Parameters.AddWithValue("@FILEEXT", fileExt); cmd.Parameters.AddWithValue("@DESCRIPTION", Description); cmd.Parameters.AddWithValue("@ADMINID", AdminId); cmd.Parameters.AddWithValue("@YOUTUBE_URL", YoutubeURL); cmd.Parameters.AddWithValue("@YOUTUBE_ID", YoutubeID); cmd.Parameters.Add(new SqlParameter("@ISDISPLAY", SqlDbType.Char)).Value = IsDisplay ? ''1'' : ''0''; SqlParameter IMAGEID = new SqlParameter(); IMAGEID = cmd.Parameters.Add("@IMAGEID", SqlDbType.NVarChar, 300); IMAGEID.Direction = ParameterDirection.Output; SqlParameter intReturn = new SqlParameter(); intReturn = cmd.Parameters.Add("@INTRETURN", SqlDbType.Int); intReturn.Direction = ParameterDirection.Output; cmd.ExecuteScalar(); RetValue = intReturn.Value.ToString(); if (intReturn.Value.ToString() == "1" && FileName != null) { string _bucketpath = ConfigurationManager.AppSettings["bucketName"].ToString() + ConfigurationManager.AppSettings["ResourcebucketName"].ToString() + CategoryId.ToString() + "/" + SubCategoryId.ToString(); BWS.AWS.S3 s3 = new BWS.AWS.S3(); string _returns3 = s3.UploadFile(_bucketpath, IMAGEID.Value.ToString(), ReadFully(Media)); } } catch (Exception ex) { RetValue = ex.Message.ToString(); } } return RetValue; }
这篇关于如何显示我在数据库中上传的pdf和doc文件的缩略图.的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文