C # determine whether a file or folder exists and is created

C # application knowledge collection 14:19:57564Comment0 Font Size:LargeMediumSmall

C # determine whether a file or folder exists and is created

Using system;

Using system. Data;

Using system. configuration;

Using system. collections;

Using system. Web;

Using system. Web. Security;

Using system. Web. UI;

Using system. Web. UI. webcontrols;

Using system. Web. UI. webcontrols. webparts;

Using system. Web. UI. htmlcontrols;

Using system. IO;

Public partial class default3: system. Web. UI. Page

{

Protected void page_load (Object sender, eventargs E)

{

Showpic. Visible = false; // Initialization is not displayed

Showtext. Visible = false; // Initialization is not displayed

}

Protected void button#click (Object sender, eventargs E)

{

If (directory. exists (server. mappath ("~ /Upimg/hufu ") = false) // create a file folder if it does not exist.

{

Directory. createdirectory (server. mappath ("~ /Upimg/hufu "));

}

// Directory. Delete (server. mappath ("~ /Upimg/hufu "), true); // delete folders, subdirectories, and files in folders.

// Determine the existence of the file

If (file. exists (server. mappath ("~ /Upimg/data.html ")))

{

Response. Write ("yes ");

// File exists

}

Else

{

Response. Write ("no ");

// The file does not exist.

File. Create (mappath ("~ /Upimg/data.html "); // create the file

}

String name = getfiles. filename; // get the name of the uploaded file

String size = getfiles. postedfile. contentlength. tostring (); // obtain the size of the uploaded file.

String type = getfiles. postedfile. contenttype; // obtain the mime of the uploaded file

String Postfix = Name. substring (name. lastindexof (".") + 1); // obtain the suffix of the uploaded file

String ipath = server. mappath ("upimg") + "\" + name; // obtain the actual file path

String fpath = server. mappath ("upfile") + "\" + name;

String dpath = "upimg \" + name; // determines the virtual path written to the database

Showpic. Visible = true; // Activation

Showtext. Visible = true; // Activation

// Determine the file format

If (name = ""){

Response. Write ("<SCRIPT> alert ('file cannot be blank ') </SCRIPT> ");

}

Else {

If (Postfix = "jpg" | Postfix = "GIF" | Postfix = "BMP" | Postfix = "PNG ")

{

Getfiles. saveas (ipath );

Showpic. imageurl = dpath;

Showtext. TEXT = "the name of the image you uploaded is:" + name + "<br>" + "file size: "+ size +" kb "+" <br> "+" file type: "+ Type +" <br> "+" actual storage path: "+ ipath;

}

Else

{

Showpic. Visible = false; // hide the image

Getfiles. saveas (fpath); // The folder upfile is stored because it is not an image file.

Showtext. TEXT = "the name of the file you uploaded is:" + name + "<br>" + "file size: "+ size +" kb "+" <br> "+" file type: "+ Type +" <br> "+" actual storage path: "+ fpath;

}

}

}