ASP. NET File Operations

Using system;
Using system. collections;
Using system. configuration;
Using system. Data;
Using system. LINQ;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. htmlcontrols;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. xml. LINQ;
Using system. IO;
Using system. collections;

Public partial class anewfile: system. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{

}
Protected void btnewfile_click (Object sender, eventargs E)
{
If (this. txfilename. Text = string. Empty)
{
Response. Write ("<SCRIPT> alert ('Enter the name') </SCRIPT> ");
}
Else
{
String name = This. txfilename. text;
String Path = server. mappath ("") + "\" + name; // obtain the path of the folder Server
If (directory. exists (PATH) // determines whether the folder exists on the server.
{
Response. Write ("<SCRIPT> alert ('Folder already exists ') </SCRIPT> ");
}
Else
{
Directoryinfo folder = directory. createdirectory (PATH); // create a file
String time = convert. tostring (directory. getcreationtime (PATH); // obtain the creation time
String Foldername = This. txfilename. Text. substring (this. txfilename. Text. lastindexof ("\") + 1 );
Response. Write ("<SCRIPT> alert ('created successfully" + Foldername + "time =" + time + "') </SCRIPT> ");
}
}
}
Protected void button#click (Object sender, eventargs E)
{
If (this. textbox1.text = string. Empty)
{
Response. Write ("Enter the name ");
}
Else
{
String name = This. textbox1.text;
String deletepath = server. mappath ("") + "\" + name;
If (directory. exists (deletepath ))
{
Directory. Delete (deletepath );
Response. Write ("<SCRIPT> alert ('deleted successfully! ') </SCRIPT> ");
}
Else
{
Response. Write ("this folder is not found ");
}
}
}
Protected void button2_click (Object sender, eventargs E)
{
String pathname = This. textbox2.text;
String filename = server. mappath ("") + "//" + pathname;
This. listbox1.items. Clear ();
If (! Directory. exists (filename ))
{
Listbox1.visible = false;
Response. Write ("<SCRIPT> alert ('Folder not found ') <SCRIPT> ");
}
Else
{
Directoryinfo foldinfo = new directoryinfo (filename );
Filesysteminfo [] dirs = foldinfo. getfilesysteminfos (); // The getfilesysteminfos method obtains the list in the folder and saves the data to the filesysteminfo [] array.
If (dirs. Length <1) // determine whether the folder contains data
{
Response. Write ("<SCRIPT> alert ('" + foldinfo + "no data in the file') <SCRIPT> ");
Return;
}
This. listbox1.visible = true;
This. listbox1.datasource = dirs; // bind to ListBox
This. listbox1.databind ();
}
}
Protected void button3_click (Object sender, eventargs E)
{
String pathname = This. textbox3.text;
String filename = server. mappath ("") + "\" + pathname;
If (! File. exists (filename) // determines whether the file exists.
{
Response. Write ("<SCRIPT> alert ('this file does not exist') </SCRIPT> ");
Return;
}
Try
{
File. Delete (filename); // Delete
Response. Write ("<SCRIPT> alert ('deleted successfully') </SCRIPT> ");
}
Catch (exception ERR)
{
Response. Write (ERR. tostring ());
}
}
Protected void button4_click (Object sender, eventargs E)
{
String pathname = This. textbox4.text;
String filename = server. mappath ("") + "\" + pathname;
If (! File. exists (filename) // determines whether the file exists.
{
Response. Write ("<SCRIPT> alert ('this file does not exist') </SCRIPT> ");
Return;
}
Else
{
This. panel1.visible = true;
Fileinfo file = new fileinfo (filename );
This. label1.text = file. fullname; // obtain the file path
This. label2.text = file. Length + "Byte"; // obtain the file size.
This. label3.text = file. Attributes. tostring (); // get file attributes
This. label4.text = file. creationtime. tow.datestring (); // obtain the creation time.
This. label5.text = file. lastaccesstime. to1_datestring (); // time of last access
}
}
Protected void button5_click (Object sender, eventargs E)
{
String pathname = This. fileupload1.postedfile. filename;
Fileinfo Fi = new fileinfo (pathname); // create a file operation fileinfo object
String filename = Fi. Name; // get the file name
String extension = Fi. extension; // get the file extension
If (extension! = ". Txt ")
{
Response. Write ("<SCRIPT> alert ('Open TXT document') </SCRIPT> ");
Return;
}
Streamreader sr = new streamreader (pathname, system. Text. encoding. Default); // create a data stream to read the streamreader object and set its read encoding method
This. label6.text = filename + "the content in the file is as follows ";
This. label7.text = "& nbsp;" + Sr. readtoend (); // display content
Sr. Close ();

}
Protected void button6_click (Object sender, eventargs E)
{
String Path = This. fileupload2.postedfile. filename. tostring ();
If (Path = string. Empty)
{
Response. Write ("<SCRIPT> alert ('Open the document to modify ') </SCRIPT> ");
Return;
}
Fileinfo info = new fileinfo (PATH );
String Extentsion = info. extension. tostring (); // get the file extension
If (Extentsion! = ". Txt ")
{
Response. Write ("<SCRIPT> alert ('Open TXT document') </SCRIPT> ");
Return;
}
Viewstate ["path"] = path;
Streamreader sr = new streamreader (path, system. Text. encoding. Default); // create a data stream to read the streamreader object and set its read encoding method
This. textbox5.text = Sr. readtoend (); // display content
Sr. Close ();
}
Protected void button7_click (Object sender, eventargs E)
{
Try
{
String Path = viewstate ["path"]. tostring ();
Streamwriter RW = new streamwriter (path, true, system. Text. encoding. getencoding ("UTF-8 "));
RW. writeline (this. textbox5.text );
RW. Close ();
This. textbox5.text = string. empty;
Response. Write ("<SCRIPT> alert ('data written successfully') </SCRIPT> ");
Viewstate ["path"] = NULL;
}
Catch
{
Response. Write ("<SCRIPT> alert ('select text') </SCRIPT> ");
}
}
}