C # generate a PDF file and read the TXT file content

Using system. IO;
Using itextsharp. text;
Using itextsharp.text.pdf;
// Icsharpcode. sharpziplib. dll and itextsharp. dll must be referenced in the project.
Public String txtfilepath;
Public String savepdfpath; // path for saving the PDF file

# Region read TXT content
Private string readxieyi (string filepath)
{
String xieyi = "";
Fileinfo Fi = new fileinfo (filepath );
Streamreader sr = Fi. opentext ();
Xieyi = Sr. readtoend ();
Sr. Close ();
Return xieyi;
}
# Endregion
# Region PDF document creation method
Private void zscsc ()
{
Document document = new document (pagesize. A4 );

Try
{
// <Deleetask>
// <Add key = "txtfilepath" value = "config/pubcode/"/>
// <! -- The Node (value: config/pubcode/In webui) file added in webcofig is saved under the specified file. -->
// <Deleetask>
String name = online. webui. accountcontroller. loginname + "_" + _ pic_id + ". pdf ";
Savepdfpath = appdomain. currentdomain. basedirectory. tostring () + configurationsettings. receivettings ["savepdfpath"] + name;
// Object filename = "C: //" + name; // filename, file storage path
Using writer = Using writer. getinstance (document, new filestream (savepdfpath. tostring (), filemode. Create ));

Document. addtitle ("image authorization Protocol ");
Document. addauthor ("quanjing. com ");
Document. addheader ("expires", "0 ");
Document. open ();

Basefont bfsun = basefont. createfont (@ "C: \ WINDOWS \ fonts \ simkai. TTF", basefont. identity_h, false); // The called font
Font font = new font (bfsun, 15 );

String text = "image authorization protocol \ n ";
Document. Add (new paragraph (text, font ));

// <Deleetask>
// <Add key = "txtfilepath" value = "config/pubcode/xieyi.txt"/>
// <! -- The advantage of adding a node in webcofig (the value is config/pubcode/xieyi.txt in webui) is that if the TXT name is changed, you can directly change webconfig. -->
// <Deleetask>
Txtfilepath = appdomain. currentdomain. basedirectory. tostring () + configurationsettings. deleettings ["txtfilepath"];

Font = new font (bfsun, 10 );
TEXT = readxieyi (txtfilepath); // (@ "C: \ xieyi.txt"); read the path of the TXT file "image authorized TXT file protocol content ";
Document. Add (new paragraph (text, font ));

// Insert an image
String strcatalogid;
Datatable dt = online. Business. Production. bizdownpro. getcatalogid (_ pic_id );
Strcatalogid = DT. Rows [0] [0]. tostring ();
String filenameurl = "http://images.com/" + strcatalogid. tolower () + "/Thu/" + _ pic_id.tolower () + ". jpg "; //" http://images.com/west004/thu/babf00254.jpg "; // path of the image
Itextsharp. Text. Image JPEG = itextsharp. Text. image. getinstance (New uri (filenameurl ));
Document. Add (new paragraph ("\ n authorized image:", font ));
Document. Add (JPEG );

// Insert the image number
Document. Add (new paragraph ("\ n image No.:" + _ pic_id, font ));
String activatecode;
Activatecode = _ pic_id + online. webui. accountcontroller. loginname; // use the image number and the login name to generate MD5 encoding. Only the first 25 digits are used.
String md5code;
Md5code = system. web. security. formsauthentication. hashpasswordforstoringinconfigfile (activatecode, "MD5 "). tolower (). substring (0, 20); // encrypt MD5, take only the first 20 digits // "QJ-QQQQW-EEEER-TTTTY-UUUUN ";
String code;
Code = md5code. substring (0, 5); // separate each five digits "-"
Code = code + "-" + md5code. substring (5, 5 );
Code = code + "-" + md5code. substring (10, 5 );
Code = code + "-" + md5code. substring (15, 5 );
Code = "Qj-" + code. tostring (). toupper ();
Document. Add (new paragraph ("\ n authorization code:" + code, font); // code is the authorization code
}

Catch (incluentexception de)
{
Response. Write (De. Message );
}
Catch (ioexception IOE)
{
Response. Write (IOE. Message );
}
Document. Close ();
}
# Endregion
// Button event
Protected void button2_click (Object sender, eventargs E)
{
String name = online. webui. accountcontroller. loginname + "_" + _ pic_id + ". pdf ";
Savepdfpath = appdomain. currentdomain. basedirectory. tostring () + configurationsettings. receivettings ["savepdfpath"] + name;
If (! File. exists (savepdfpath. tostring ()))
{
Zscsc (); // create a PDF document
Readdowndata (); // download the TXT file
}
Else
{
Readdowndata (); // download the PDF file
}
}

// Read the TXT file and download the PDF file
Public void readdowndata ()
{
String name = online. webui. accountcontroller. loginname + "_" + _ pic_id + ". pdf ";
Savepdfpath = appdomain. currentdomain. basedirectory. tostring () + configurationsettings. receivettings ["savepdfpath"] + name;
// Read the file and write it to the client for response
Filestream FS = new filestream (savepdfpath. tostring (), filemode. Open, fileaccess. Read );

Byte [] B = new byte [fs. Length];
FS. Read (B, 0, B. Length );
FS. Flush ();
FS. Close ();
// File. Delete (filename. tostring (); no deletion is performed after the download.
Response. Clear ();
Response. clearheaders ();
Response. Buffer = false;
Response. contenttype = "application/octet-stream"; // contenttype;
Response. appendheader ("content-disposition", "attachment; filename =" + httputility. urlencode (name, system. Text. encoding. utf8 ));
Response. appendheader ("Content-Length", B. length. tostring ());
Response. outputstream. Write (B, 0, B. Length );
Response. Flush ();
Response. End ();
}

Reprinted http://www.idai.com.cn/blog/article.asp? Id = 489