).Create creates a new file. If the file exists, it overwrites the file. If not, it creates a new file.Createnew creates a new file. If yes, an exception occurs.Open the existing file. If yes, an exception occurs if no file exists.If a file exists, the file is opened. If the file exists, the file is opened. If the file does not exist, the file is created.
The myfilestream2 object is instantiated using fileinfo. The fileinfo methods include open, openreade,
.· CreateText: Creates or opens a new file for writing text.· OpenText: open an existing text file for reading.But the above method mainly on the UTF-8 encoding text operations, which is not flexible enough. We recommend that you use the following code to operate the txt file.· Read the txt file. The sample code is as follows:StreamReader TxtReader = new StreamReader (@ "c: \ tempuploads \ newFile.txt", System. Text. Encoding. Default );String FileCon
long-lasting cooperation with the legal community and has been committedProtect sensitive documents attached to emails. Workshare Pro v8 now extends Secure File TransferCloud. We now allow users and IT practitioners to operate and protect highly sensitive information and share IT with people outside the Organization.
Workshare Professional 8 includes the following enhancements:
Simplify the comparison, provide new interactive protection by integrating the OCR desktop solution, simplify meta d
Asp.net c file writing function example code StreamWriter and StreamReader write characters to the stream and read characters from the stream. The following code example opens the log.txt file (create a file if the file does not exist) for input and attaches the information to the end of the file. Then write the file content to the standard output for display.
Asp tutorial. net c file writing function instance codeStreamwriter and streamreader write characters to the stream and read the characte
present, copy the file first, then delete it, then move the copied file, if it does not exist, create the file first, then open the file and write, and finally set the file property to read-only and hidden. Copy the code as follows: if (file.exists (@ "C:\tempuploads\newFile.txt"))//Determine if the file exists {CopyFile ();//Copy File DeleteFile ();//delete file MoveFile (); Move file}else{MakeFile ();///Generate file OpenFile ();//Open File Setfile ();//Set file properties} In addition, the f
the Page_Load method in the showfile. aspx. cs file ):
// Receives input parameters and determines the name of the file to be operated.
StrFile2Show = Request. QueryString ["File"];
// Instantiate a FileInfo object based on the object name
FileInfo fi =NewFileInfo (strFile2Show );
FileDetail. Text ="File name :";
FileDetail. Text + = strFile2Show +";
FileDetail. Text + ="File size";
// Obtain the file size, and then convert the unit to KB.
FileDetail. Text + = (fi. Length/1
C # When reading and writing a file, the file is being used by another process. Therefore, the process cannot access the file and encounters an I/O failure.
The file "D: \ log.txt" is being used by another process, so the process cannot access the file.
Log.txt is a log file and may be written to it by another program from time to time.
I/O streams need to be used to read log files and display them in log query.
1. filestream FS = file. openread (URL );Streamreader sr = new streamreader (system.
":Xnode. itemname = XTR. readstring ();Xcol. Add (xnode );Break;Default:Break;}}}XTR. Close ();}}
Public sealed class enhancedtreenode: system. Windows. Forms. treenode{Private int m_intitemid =-1;Private string m_stritemname = string. empty;
Public enhancedtreenode (){// Add constructor logic here}
Public enhancedtreenode (string itemname, int Itemid){M_intitemid = Itemid;M_stritemname = itemname;This. Text = itemname;}
Public int Itemid{Get {return m_intitemid ;}Set {m_intitemid = value ;}}
P
| fileattributes. Hidden );}In addition to common read-only and hidden attributes, files include archive, system, and temporary. For details about file attributes, see the description of fileattributes in msdn.(7) method for determining whether a file exists: file. existThe method is declared as follows:Public static bool exists (string path );The following code checks whether the c: \ tempuploads \ newfile.txt file exists. If the file exists, copy the file first, delete it, and then move the c
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 contentPrivate string readxieyi (string filepath){String xieyi = "";Fileinfo Fi = new fileinfo (filepath );Streamreader sr = Fi. opentext ();Xieyi = Sr. readtoend ();Sr. Close ();Return xieyi;}# Endre
(. NET Framework 2.0)
2. Concept of stream:
A stream is an object used to transmit data. Data transmission has two directions:
If the data is transmitted from the external source to the program, this is the read stream; if the data is transmitted from the program to the external source during the summer vacation, This is the write stream.
3. filestream class: used to read and write binary files. To construct a filestream instance, you need the following four pieces of information: (. NET Framew
, password, writerespassword, ignorereadonlyrecommended, origin, delimiter, editable, y, converter, addtomru, local, corruptload)
Filename is a required parameter, indicating the name of the workbook to be opened. If no path is specified, it indicates the current path. The other 14 are optional parameters, except Password parameters, which are rarely used. For specific meanings, see the help of VBA.
Example:
Workbooks. Open "F: test.xls"
Open the test.xls file on the fdisk.
2. Open a text file
Y
method to create a series of changing methods. Each method has a list of different parameters.
Scope:The default scope of the shared method is public. We can also set the sharing method to friend, protected, or private in the Declaration. In fact, when a method is overloaded, we have different scopes as long as the parameter list is different.
Usage:How is the sharing method used? Let's look at an example. When we want to open a text file for the input, we can use a shared code in the
This article is a learning note, C # advanced programming 6 chapter 25 file and registry operations
1. Manage File Systems
1. File directory is a static class. You can use these classes to call only one operation of a File or folder.
FIleInfo DirectoryInfo is a sealed class and needs to be instantiated. Therefore, if you operate a file multiple times, you can use these classes.
2. FileInfo can execute Open (), OpenRead (), OpenText (), OpenWrite (), C
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