FileInfo.MoveTo Metoda
Definice
Důležité
Některé informace platí pro předběžně vydaný produkt, který se může zásadně změnit, než ho výrobce nebo autor vydá. Microsoft neposkytuje žádné záruky, výslovné ani předpokládané, týkající se zde uváděných informací.
Přetížení
| MoveTo(String) |
Přesune zadaný soubor do nového umístění s možností zadat nový název souboru. |
| MoveTo(String, Boolean) |
Přesune zadaný soubor do nového umístění a poskytne možnosti pro zadání nového názvu souboru a přepsání cílového souboru, pokud již existuje. |
MoveTo(String)
- Zdroj:
- FileInfo.cs
- Zdroj:
- FileInfo.cs
- Zdroj:
- FileInfo.cs
Přesune zadaný soubor do nového umístění s možností zadat nový název souboru.
public:
void MoveTo(System::String ^ destFileName);public void MoveTo (string destFileName);member this.MoveTo : string -> unitPublic Sub MoveTo (destFileName As String)Parametry
- destFileName
- String
Cesta k přesunutí souboru, která může zadat jiný název souboru.
Výjimky
Dojde k V/V chybě, například cílový soubor již existuje nebo cílové zařízení není připravené.
destFileName je null.
Verze .NET Framework a .NET Core starší než 2.1: destFileName jsou prázdné, obsahují pouze prázdné znaky nebo obsahují neplatné znaky.
Volající nemá požadované oprávnění.
destFileName je jen pro čtení nebo je adresář.
Soubor nebyl nalezen.
Zadaná cesta je neplatná, například na nenamapované jednotce.
Zadaná cesta, název souboru nebo obojí překračují maximální délku definovanou systémem.
destFileName obsahuje dvojtečku (:) uprostřed řetězce.
Příklady
Následující příklad ukazuje přesunutí souboru do jiného umístění a přejmenování souboru.
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.IO;
using System.Reflection;
using System.Security.Permissions;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml;
namespace Microsoft.Samples.MoveTo.CS
{
class Program
{
private static string sourcePath = Environment.GetFolderPath
(Environment.SpecialFolder.MyDocuments) +
@"\FileInfoTestDirectory\MoveFrom\FromFile.xml";
private static string destPath = Environment.GetFolderPath
(Environment.SpecialFolder.MyDocuments) +
@"\FileInfoTestDirectory\DestFile.xml";
//
// The main entry point for the application.
//
[STAThread()] static void Main ()
{
// Change Console properties to make it obvious that
// the application is starting.
Console.Clear();
// Move it to the upper left corner of the screen.
Console.SetWindowPosition(0, 0);
// Make it very large.
Console.SetWindowSize(Console.LargestWindowWidth - 24,
Console.LargestWindowHeight - 16);
Console.WriteLine("Welcome.");
Console.WriteLine("This application demonstrates the FileInfo.MoveTo method.");
Console.WriteLine("Press any key to start.");
string s = Console.ReadLine();
Console.Write(" Checking whether ");
Console.Write(sourcePath);
Console.WriteLine(" exists.");
FileInfo fInfo = new FileInfo (sourcePath);
EnsureSourceFileExists();
DisplayFileProperties(fInfo);
Console.WriteLine("Preparing to move the file to ");
Console.Write(destPath);
Console.WriteLine(".");
MoveFile(fInfo);
DisplayFileProperties(fInfo);
Console.WriteLine("Preparing to delete directories.");
DeleteFiles();
Console.WriteLine("Press the ENTER key to close this application.");
s = Console.ReadLine();
}
//
// Moves the supplied FileInfo instance to destPath.
//
private static void MoveFile(FileInfo fInfo)
{
try
{
fInfo.MoveTo(destPath);
Console.WriteLine("File moved to ");
Console.WriteLine(destPath);
} catch (Exception ex) {
DisplayException(ex);
}
}
//
// Ensures that the test directories
// and the file FromFile.xml all exist.
//
private static void EnsureSourceFileExists()
{
FileInfo fInfo = new FileInfo(sourcePath);
string dirPath = fInfo.Directory.FullName;
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}
if (File.Exists(destPath))
{
File.Delete(destPath);
}
Console.Write("Creating file ");
Console.Write(fInfo.FullName);
Console.WriteLine(".");
try
{
if (!fInfo.Exists)
{
Console.WriteLine("Adding data to the file.");
WriteFileContent(10);
Console.WriteLine("Successfully created the file.");
}
}
catch (Exception ex)
{
DisplayException(ex);
}
finally
{
dirPath = null;
}
}
//
// Creates and saves an Xml file to sourcePath.
//
private static void WriteFileContent(int totalElements)
{
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
doc.AppendChild(doc.CreateXmlDeclaration("1.0", null, "yes"));
doc.AppendChild(doc.CreateWhitespace("\r\n"));
XmlElement root = doc.CreateElement("FileInfo.MoveTo");
root.AppendChild(doc.CreateWhitespace("\r\n"));
int index = 0;
XmlElement elem;
while (index < totalElements)
{
elem = doc.CreateElement("MyElement");
elem.SetAttribute("Index", index.ToString());
elem.AppendChild(doc.CreateWhitespace("\r\n"));
elem.AppendChild(doc.CreateTextNode(String.Format
("MyElement at position {0}.", index)));
elem.AppendChild(doc.CreateWhitespace("\r\n"));
root.AppendChild(elem);
root.AppendChild(doc.CreateWhitespace("\r\n"));
index++;
}
doc.AppendChild(root);
doc.AppendChild(doc.CreateWhitespace("\r\n"));
doc.Save(sourcePath);
elem = null;
root = null;
doc = null;
}
//
// Displays FullName, CreationTime, and LastWriteTime of the supplied
// FileInfo instance, then displays the text of the file.
//
private static void DisplayFileProperties(FileInfo fInfo)
{
Console.WriteLine("The FileInfo instance shows these property values.");
StreamReader reader = null;
try
{
Console.Write("FullName: ");
Console.WriteLine(fInfo.FullName);
Console.Write("CreationTime: ");
Console.WriteLine(fInfo.CreationTime);
Console.Write("LastWriteTime: ");
Console.WriteLine(fInfo.LastWriteTime);
Console.WriteLine();
Console.WriteLine("File contents:");
Console.WriteLine();
reader = new StreamReader(fInfo.FullName);
while (!reader.EndOfStream)
{
Console.WriteLine(reader.ReadLine());
}
Console.WriteLine();
}
catch (Exception ex)
{
DisplayException(ex);
}
finally
{
if (reader != null)
{
reader.Close();
}
reader = null;
}
}
//
// Deletes the test directory and all its files and subdirectories.
//
private static void DeleteFiles()
{
try
{
DirectoryInfo dInfo = new DirectoryInfo(Environment.GetFolderPath
(Environment.SpecialFolder.MyDocuments) + "\\FileInfoTestDirectory");
if (dInfo.Exists)
{
dInfo.Delete(true);
Console.WriteLine("Successfully deleted directories and files.");
}
dInfo = null;
}
catch (Exception ex)
{
DisplayException(ex);
}
}
//
// Displays information about the supplied Exception. This
// code is not suitable for production applications.
//
private static void DisplayException(Exception ex)
{
StringBuilder sb = new StringBuilder();
sb.Append("An exception of type \"");
sb.Append(ex.GetType().FullName);
sb.Append("\" has occurred.\r\n");
sb.Append(ex.Message);
sb.Append("\r\nStack trace information:\r\n");
MatchCollection matchCol = Regex.Matches(ex.StackTrace,
@"(at\s)(.+)(\.)([^\.]*)(\()([^\)]*)(\))((\sin\s)(.+)(:line )([\d]*))?");
int L = matchCol.Count;
string[] argList;
Match matchObj;
int y, K;
for(int x = 0; x < L; x++)
{
matchObj = matchCol[x];
sb.Append(matchObj.Result("\r\n\r\n$1 $2$3$4$5"));
argList = matchObj.Groups[6].Value.Split(new char[] { ',' });
K = argList.Length;
for (y = 0; y < K; y++)
{
sb.Append("\r\n ");
sb.Append(argList[y].Trim().Replace(" ", " "));
sb.Append(',');
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n)");
if (0 < matchObj.Groups[8].Length)
{
sb.Append(matchObj.Result("\r\n$10\r\nline $12"));
}
}
argList = null;
matchObj = null;
matchCol = null;
Console.WriteLine(sb.ToString());
sb = null;
}
}
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
// Welcome.
// This application demonstrates the FileInfo.MoveTo method.
// Press any key to start.
//
// Checking whether C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml exists.
// Creating file C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml.
// Adding data to the file.
// Successfully created the file.
// The FileInfo instance shows these property values.
// FullName: C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml
// CreationTime: 4/18/2006 1:24:19 PM
// LastWriteTime: 4/18/2006 1:24:19 PM
//
// File contents:
//
// <?xml version="1.0" standalone="yes"?>
// <MyElement Index="0">
// MyElement at position 0.
// <MyElement Index="1">
// MyElement at position 1.
// <MyElement Index="2">
// MyElement at position 2.
// <MyElement Index="3">
// MyElement at position 3.
// <MyElement Index="4">
// MyElement at position 4.
// <MyElement Index="5">
// MyElement at position 5.
// <MyElement Index="6">
// MyElement at position 6.
// <MyElement Index="7">
// MyElement at position 7.
// <MyElement Index="8">
// MyElement at position 8.
// <MyElement Index="9">
// MyElement at position 9.
// Preparing to move the file to
// C:\Documents and Settings\MYComputer\My Documents\FileInfoTestDirectory\DestFile.xml.
// File moved to
// C:\Documents and Settings\MYComputer\My Documents\FileInfoTestDirectory\DestFile.xml
// The FileInfo instance shows these property values.
// FullName: C:\Documents and Settings\MYComputer\My Documents\FileInfoTestDirectory\DestFile.xml
// CreationTime: 4/18/2006 1:24:19 PM
// LastWriteTime: 4/18/2006 1:24:19 PM
//
// File contents:
//
// <?xml version="1.0" standalone="yes"?>
// <MyElement Index="0">
// MyElement at position 0.
// <MyElement Index="1">
// MyElement at position 1.
// <MyElement Index="2">
// MyElement at position 2.
// <MyElement Index="3">
// MyElement at position 3.
// <MyElement Index="4">
// MyElement at position 4.
// <MyElement Index="5">
// MyElement at position 5.
// <MyElement Index="6">
// MyElement at position 6.
// <MyElement Index="7">
// MyElement at position 7.
// <MyElement Index="8">
// MyElement at position 8.
// <MyElement Index="9">
// MyElement at position 9.
//
// Preparing to delete directories.
// Successfully deleted directories and files.
// Press the ENTER key to close this application.
Imports System.IO
Imports System.Text
Imports System.Text.RegularExpressions
Imports System.Xml
Module Program
Private sourcePath As String = Environment.GetFolderPath _
(Environment.SpecialFolder.MyDocuments) & _
"\FileInfoTestDirectory\MoveFrom\FromFile.xml"
'
Private destPath As String = Environment.GetFolderPath _
(Environment.SpecialFolder.MyDocuments) & _
"\FileInfoTestDirectory\DestFile.xml"
'
' The main entry point for the application.
'
<STAThread()> Sub Main()
' Change Console properties to make it obvious that
' the application is starting.
Console.Clear()
' Move it to the upper left corner of the screen.
Console.SetWindowPosition(0, 0)
' Make it very large.
Console.SetWindowSize(Console.LargestWindowWidth - 24, _
Console.LargestWindowHeight - 16)
Console.WriteLine("Welcome.")
Console.WriteLine("This application demonstrates the FileInfo.MoveTo method.")
Console.WriteLine("Press any key to start.")
Dim s As String = Console.ReadLine()
Console.Write(" Checking whether ")
Console.Write(sourcePath)
Console.WriteLine(" exists.")
Dim fInfo As FileInfo = New FileInfo(sourcePath)
EnsureSourceFileExists()
DisplayFileProperties(fInfo)
Console.WriteLine("Preparing to move the file to ")
Console.Write(destPath)
Console.WriteLine(".")
MoveFile(fInfo)
DisplayFileProperties(fInfo)
Console.WriteLine("Preparing to delete directories.")
DeleteFiles()
Console.WriteLine("Press the ENTER key to close this application.")
s = Console.ReadLine()
End Sub
'
' Moves the supplied FileInfo instance to destPath.
'
Private Sub MoveFile(ByVal fInfo As FileInfo)
Try
fInfo.MoveTo(destPath)
Console.WriteLine("File moved to ")
Console.WriteLine(destPath)
Catch ex As Exception
DisplayException(ex)
End Try
End Sub
'
' Ensures that the test directories
' and the file FromFile.xml all exist.
'
Private Sub EnsureSourceFileExists()
' Create a FileInfo instance, and get the full path
' to the parent directory.
Dim fInfo As FileInfo = New FileInfo(sourcePath)
Dim dirPath As String = fInfo.Directory.FullName
' If the directory does not exist, create it.
If Not Directory.Exists(dirPath) Then
Directory.CreateDirectory(dirPath)
End If
' If DestFile.xml exists, delete it.
If File.Exists(destPath) Then
File.Delete(destPath)
End If
Console.Write("Creating file ")
Console.Write(fInfo.FullName)
Console.WriteLine(".")
Try
If Not fInfo.Exists Then
' Call WriteFileContent to create the file.
Console.WriteLine("Adding data to the file.")
WriteFileContent(10)
Console.WriteLine("Successfully created the file.")
End If
Catch ex As Exception
DisplayException(ex)
Finally
dirPath = Nothing
fInfo = Nothing
End Try
End Sub
'
' Creates and saves an Xml file to sourcePath.
'
Private Sub WriteFileContent(ByVal totalElements As Integer)
Dim doc As New XmlDocument()
doc.PreserveWhitespace = True
doc.AppendChild(doc.CreateXmlDeclaration("1.0", Nothing, "yes"))
doc.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
Dim root As XmlElement = doc.CreateElement("FileInfo.MoveTo")
Dim index As Integer = 0
Dim elem As XmlElement
While index < totalElements
elem = doc.CreateElement("MyElement")
elem.SetAttribute("Index", index.ToString())
elem.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
elem.AppendChild(doc.CreateTextNode(String.Format _
("MyElement at position {0}.", index)))
elem.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
root.AppendChild(elem)
index += 1
End While
doc.AppendChild(root)
doc.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
doc.Save(sourcePath)
End Sub
'
' Displays FullName, CreationTime, and LastWriteTime of the supplied
' FileInfo instance, then displays the text of the file.
'
Private Sub DisplayFileProperties(ByVal fInfo As FileInfo)
Console.WriteLine("The FileInfo instance shows these property values.")
Dim reader As StreamReader = Nothing
Try
Console.Write("FullName: ")
Console.WriteLine(fInfo.FullName)
Console.Write("CreationTime: ")
Console.WriteLine(fInfo.CreationTime)
Console.Write("LastWriteTime: ")
Console.WriteLine(fInfo.LastWriteTime)
Console.WriteLine()
Console.WriteLine("File contents:")
Console.WriteLine()
reader = New StreamReader(fInfo.FullName)
While Not reader.EndOfStream
Console.WriteLine(reader.ReadLine())
End While
Console.WriteLine()
Catch ex As Exception
DisplayException(ex)
Finally
If Not reader Is Nothing Then
reader.Close()
reader = Nothing
End If
End Try
End Sub
'
' Deletes the test directory and all its files and subdirectories.
'
Private Sub DeleteFiles()
Try
Dim dInfo As DirectoryInfo = New DirectoryInfo(Environment.GetFolderPath _
(Environment.SpecialFolder.MyDocuments) + "\FileInfoTestDirectory")
If dInfo.Exists Then
dInfo.Delete(True)
Console.WriteLine("Successfully deleted directories and files.")
End If
dInfo = Nothing
Catch ex As Exception
DisplayException(ex)
End Try
End Sub
'
' Displays information about the supplied Exception. This
' code is not suitable for production applications.
'
Private Sub DisplayException(ByVal ex As Exception)
Dim sb As New StringBuilder("An exception of type """)
sb.Append(ex.GetType().FullName)
sb.Append(""" has occurred.")
sb.Append(ControlChars.CrLf)
sb.Append(ex.Message)
sb.Append(ControlChars.CrLf)
sb.Append("Stack trace information:")
sb.Append(ControlChars.CrLf)
Dim matchCol As MatchCollection = Regex.Matches(ex.StackTrace, _
"(at\s)(.+)(\.)([^\.]*)(\()([^\)]*)(\))((\sin\s)(.+)(:line )([\d]*))?")
Dim L As Integer = matchCol.Count
Dim y, K As Integer
Dim argList() As String
Dim matchObj As Match
Dim x As Integer = 0
While x < L
matchObj = matchCol(x)
sb.Append(ControlChars.CrLf)
sb.Append(ControlChars.CrLf)
sb.Append(matchObj.Result("$1 $2$3$4$5"))
argList = matchObj.Groups(6).Value.Split(New Char() {","})
K = argList.Length
y = 0
While y < K
sb.Append(ControlChars.CrLf)
sb.Append(" ")
sb.Append(argList(y).Trim().Replace(" ", " "))
sb.Append(",")
y += 1
End While
sb.Remove(sb.Length - 1, 1)
sb.Append(ControlChars.CrLf)
If 0 < matchObj.Groups(8).Length Then
sb.Append(ControlChars.CrLf)
sb.Append(matchObj.Result("$10"))
sb.Append(ControlChars.CrLf)
sb.Append(matchObj.Result("line $12"))
End If
x += 1
End While
argList = Nothing
matchObj = Nothing
matchCol = Nothing
Console.WriteLine(sb.ToString())
sb = Nothing
Return
End Sub
End Module
' Welcome.
' This application demonstrates the FileInfo.MoveTo method.
' Press any key to start.
'
' Checking whether C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml exists.
' Creating file C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml.
' Adding data to the file.
' Successfully created the file.
' The FileInfo instance shows these property values.
' FullName: C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml
' CreationTime: 4/18/2006 1:38:19 PM
' LastWriteTime: 4/18/2006 1:38:19 PM
'
' File contents:
'
' <?xml version="1.0" standalone="yes"?>
' <FileInfo.MoveTo><MyElement Index="0">
' MyElement at position 0.
' </MyElement><MyElement Index="1">
' MyElement at position 1.
' </MyElement><MyElement Index="2">
' MyElement at position 2.
' </MyElement><MyElement Index="3">
' MyElement at position 3.
' </MyElement><MyElement Index="4">
' MyElement at position 4.
' </MyElement><MyElement Index="5">
' MyElement at position 5.
' </MyElement><MyElement Index="6">
' MyElement at position 6.
' </MyElement><MyElement Index="7">
' MyElement at position 7.
' </MyElement><MyElement Index="8">
' MyElement at position 8.
' </MyElement><MyElement Index="9">
' MyElement at position 9.
' </MyElement></FileInfo.MoveTo>
'
' Preparing to move the file to
' C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\DestFile.xml.
' File moved to
' C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\DestFile.xml
' The FileInfo instance shows these property values.
' FullName: C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\DestFile.xml
' CreationTime: 4/18/2006 1:38:19 PM
' LastWriteTime: 4/18/2006 1:38:19 PM
'
' File contents:
'
' <?xml version="1.0" standalone="yes"?>
' <FileInfo.MoveTo><MyElement Index="0">
' MyElement at position 0.
' </MyElement><MyElement Index="1">
' MyElement at position 1.
' </MyElement><MyElement Index="2">
' MyElement at position 2.
' </MyElement><MyElement Index="3">
' MyElement at position 3.
' </MyElement><MyElement Index="4">
' MyElement at position 4.
' </MyElement><MyElement Index="5">
' MyElement at position 5.
' </MyElement><MyElement Index="6">
' MyElement at position 6.
' </MyElement><MyElement Index="7">
' MyElement at position 7.
' </MyElement><MyElement Index="8">
' MyElement at position 8.
' </MyElement><MyElement Index="9">
' MyElement at position 9.
' </MyElement></FileInfo.MoveTo>
'
' Preparing to delete directories.
' Successfully deleted directories and files.
' Press the ENTER key to close this application.
Poznámky
Tato metoda funguje na diskových svazcích. Soubor c:\MyFile.txt můžete například přesunout do složky d:\public a přejmenovat NewFile.txt.
Tato metoda nepřepíše cílový soubor, pokud již existuje. Pro tento účel místo toho zavolejte MoveTo(String, Boolean) .
Viz také
- Vstupně-výstupní operace souborů a Stream
- Postupy: Čtení textu ze souboru
- Postupy: Zápis textu do souboru
Platí pro
MoveTo(String, Boolean)
- Zdroj:
- FileInfo.cs
- Zdroj:
- FileInfo.cs
- Zdroj:
- FileInfo.cs
Přesune zadaný soubor do nového umístění a poskytne možnosti pro zadání nového názvu souboru a přepsání cílového souboru, pokud již existuje.
public:
void MoveTo(System::String ^ destFileName, bool overwrite);public void MoveTo (string destFileName, bool overwrite);member this.MoveTo : string * bool -> unitPublic Sub MoveTo (destFileName As String, overwrite As Boolean)Parametry
- destFileName
- String
Cesta k přesunutí souboru, která může zadat jiný název souboru.
- overwrite
- Boolean
true přepsat cílový soubor, pokud již existuje; false Jinak.
Výjimky
Došlo k V/V chybě, například cílové zařízení není připravené.
destFileName je null.
Verze .NET Framework a .NET Core starší než 2.1: destFileName jsou prázdné, obsahují pouze prázdné znaky nebo obsahují neplatné znaky.
Volající nemá požadované oprávnění.
destFileName je jen pro čtení nebo je adresář.
Soubor nebyl nalezen.
Zadaná cesta je neplatná, například na nenamapované jednotce.
Zadaná cesta, název souboru nebo obojí překračují maximální délku definovanou systémem.
destFileName obsahuje dvojtečku (:) uprostřed řetězce.
Příklady
Následující příklad ukazuje přesunutí souboru do jiného umístění a přejmenování souboru.
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.IO;
using System.Reflection;
using System.Security.Permissions;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml;
namespace Microsoft.Samples.MoveTo.CS
{
class Program
{
private static string sourcePath = Environment.GetFolderPath
(Environment.SpecialFolder.MyDocuments) +
@"\FileInfoTestDirectory\MoveFrom\FromFile.xml";
private static string destPath = Environment.GetFolderPath
(Environment.SpecialFolder.MyDocuments) +
@"\FileInfoTestDirectory\DestFile.xml";
//
// The main entry point for the application.
//
[STAThread()] static void Main ()
{
// Change Console properties to make it obvious that
// the application is starting.
Console.Clear();
// Move it to the upper left corner of the screen.
Console.SetWindowPosition(0, 0);
// Make it very large.
Console.SetWindowSize(Console.LargestWindowWidth - 24,
Console.LargestWindowHeight - 16);
Console.WriteLine("Welcome.");
Console.WriteLine("This application demonstrates the FileInfo.MoveTo method.");
Console.WriteLine("Press any key to start.");
string s = Console.ReadLine();
Console.Write(" Checking whether ");
Console.Write(sourcePath);
Console.WriteLine(" exists.");
FileInfo fInfo = new FileInfo (sourcePath);
EnsureSourceFileExists();
DisplayFileProperties(fInfo);
Console.WriteLine("Preparing to move the file to ");
Console.Write(destPath);
Console.WriteLine(".");
MoveFile(fInfo);
DisplayFileProperties(fInfo);
Console.WriteLine("Preparing to delete directories.");
DeleteFiles();
Console.WriteLine("Press the ENTER key to close this application.");
s = Console.ReadLine();
}
//
// Moves the supplied FileInfo instance to destPath.
//
private static void MoveFile(FileInfo fInfo)
{
try
{
fInfo.MoveTo(destPath);
Console.WriteLine("File moved to ");
Console.WriteLine(destPath);
} catch (Exception ex) {
DisplayException(ex);
}
}
//
// Ensures that the test directories
// and the file FromFile.xml all exist.
//
private static void EnsureSourceFileExists()
{
FileInfo fInfo = new FileInfo(sourcePath);
string dirPath = fInfo.Directory.FullName;
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}
if (File.Exists(destPath))
{
File.Delete(destPath);
}
Console.Write("Creating file ");
Console.Write(fInfo.FullName);
Console.WriteLine(".");
try
{
if (!fInfo.Exists)
{
Console.WriteLine("Adding data to the file.");
WriteFileContent(10);
Console.WriteLine("Successfully created the file.");
}
}
catch (Exception ex)
{
DisplayException(ex);
}
finally
{
dirPath = null;
}
}
//
// Creates and saves an Xml file to sourcePath.
//
private static void WriteFileContent(int totalElements)
{
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
doc.AppendChild(doc.CreateXmlDeclaration("1.0", null, "yes"));
doc.AppendChild(doc.CreateWhitespace("\r\n"));
XmlElement root = doc.CreateElement("FileInfo.MoveTo");
root.AppendChild(doc.CreateWhitespace("\r\n"));
int index = 0;
XmlElement elem;
while (index < totalElements)
{
elem = doc.CreateElement("MyElement");
elem.SetAttribute("Index", index.ToString());
elem.AppendChild(doc.CreateWhitespace("\r\n"));
elem.AppendChild(doc.CreateTextNode(String.Format
("MyElement at position {0}.", index)));
elem.AppendChild(doc.CreateWhitespace("\r\n"));
root.AppendChild(elem);
root.AppendChild(doc.CreateWhitespace("\r\n"));
index++;
}
doc.AppendChild(root);
doc.AppendChild(doc.CreateWhitespace("\r\n"));
doc.Save(sourcePath);
elem = null;
root = null;
doc = null;
}
//
// Displays FullName, CreationTime, and LastWriteTime of the supplied
// FileInfo instance, then displays the text of the file.
//
private static void DisplayFileProperties(FileInfo fInfo)
{
Console.WriteLine("The FileInfo instance shows these property values.");
StreamReader reader = null;
try
{
Console.Write("FullName: ");
Console.WriteLine(fInfo.FullName);
Console.Write("CreationTime: ");
Console.WriteLine(fInfo.CreationTime);
Console.Write("LastWriteTime: ");
Console.WriteLine(fInfo.LastWriteTime);
Console.WriteLine();
Console.WriteLine("File contents:");
Console.WriteLine();
reader = new StreamReader(fInfo.FullName);
while (!reader.EndOfStream)
{
Console.WriteLine(reader.ReadLine());
}
Console.WriteLine();
}
catch (Exception ex)
{
DisplayException(ex);
}
finally
{
if (reader != null)
{
reader.Close();
}
reader = null;
}
}
//
// Deletes the test directory and all its files and subdirectories.
//
private static void DeleteFiles()
{
try
{
DirectoryInfo dInfo = new DirectoryInfo(Environment.GetFolderPath
(Environment.SpecialFolder.MyDocuments) + "\\FileInfoTestDirectory");
if (dInfo.Exists)
{
dInfo.Delete(true);
Console.WriteLine("Successfully deleted directories and files.");
}
dInfo = null;
}
catch (Exception ex)
{
DisplayException(ex);
}
}
//
// Displays information about the supplied Exception. This
// code is not suitable for production applications.
//
private static void DisplayException(Exception ex)
{
StringBuilder sb = new StringBuilder();
sb.Append("An exception of type \"");
sb.Append(ex.GetType().FullName);
sb.Append("\" has occurred.\r\n");
sb.Append(ex.Message);
sb.Append("\r\nStack trace information:\r\n");
MatchCollection matchCol = Regex.Matches(ex.StackTrace,
@"(at\s)(.+)(\.)([^\.]*)(\()([^\)]*)(\))((\sin\s)(.+)(:line )([\d]*))?");
int L = matchCol.Count;
string[] argList;
Match matchObj;
int y, K;
for(int x = 0; x < L; x++)
{
matchObj = matchCol[x];
sb.Append(matchObj.Result("\r\n\r\n$1 $2$3$4$5"));
argList = matchObj.Groups[6].Value.Split(new char[] { ',' });
K = argList.Length;
for (y = 0; y < K; y++)
{
sb.Append("\r\n ");
sb.Append(argList[y].Trim().Replace(" ", " "));
sb.Append(',');
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n)");
if (0 < matchObj.Groups[8].Length)
{
sb.Append(matchObj.Result("\r\n$10\r\nline $12"));
}
}
argList = null;
matchObj = null;
matchCol = null;
Console.WriteLine(sb.ToString());
sb = null;
}
}
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
// Welcome.
// This application demonstrates the FileInfo.MoveTo method.
// Press any key to start.
//
// Checking whether C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml exists.
// Creating file C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml.
// Adding data to the file.
// Successfully created the file.
// The FileInfo instance shows these property values.
// FullName: C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml
// CreationTime: 4/18/2006 1:24:19 PM
// LastWriteTime: 4/18/2006 1:24:19 PM
//
// File contents:
//
// <?xml version="1.0" standalone="yes"?>
// <MyElement Index="0">
// MyElement at position 0.
// <MyElement Index="1">
// MyElement at position 1.
// <MyElement Index="2">
// MyElement at position 2.
// <MyElement Index="3">
// MyElement at position 3.
// <MyElement Index="4">
// MyElement at position 4.
// <MyElement Index="5">
// MyElement at position 5.
// <MyElement Index="6">
// MyElement at position 6.
// <MyElement Index="7">
// MyElement at position 7.
// <MyElement Index="8">
// MyElement at position 8.
// <MyElement Index="9">
// MyElement at position 9.
// Preparing to move the file to
// C:\Documents and Settings\MYComputer\My Documents\FileInfoTestDirectory\DestFile.xml.
// File moved to
// C:\Documents and Settings\MYComputer\My Documents\FileInfoTestDirectory\DestFile.xml
// The FileInfo instance shows these property values.
// FullName: C:\Documents and Settings\MYComputer\My Documents\FileInfoTestDirectory\DestFile.xml
// CreationTime: 4/18/2006 1:24:19 PM
// LastWriteTime: 4/18/2006 1:24:19 PM
//
// File contents:
//
// <?xml version="1.0" standalone="yes"?>
// <MyElement Index="0">
// MyElement at position 0.
// <MyElement Index="1">
// MyElement at position 1.
// <MyElement Index="2">
// MyElement at position 2.
// <MyElement Index="3">
// MyElement at position 3.
// <MyElement Index="4">
// MyElement at position 4.
// <MyElement Index="5">
// MyElement at position 5.
// <MyElement Index="6">
// MyElement at position 6.
// <MyElement Index="7">
// MyElement at position 7.
// <MyElement Index="8">
// MyElement at position 8.
// <MyElement Index="9">
// MyElement at position 9.
//
// Preparing to delete directories.
// Successfully deleted directories and files.
// Press the ENTER key to close this application.
Imports System.IO
Imports System.Text
Imports System.Text.RegularExpressions
Imports System.Xml
Module Program
Private sourcePath As String = Environment.GetFolderPath _
(Environment.SpecialFolder.MyDocuments) & _
"\FileInfoTestDirectory\MoveFrom\FromFile.xml"
'
Private destPath As String = Environment.GetFolderPath _
(Environment.SpecialFolder.MyDocuments) & _
"\FileInfoTestDirectory\DestFile.xml"
'
' The main entry point for the application.
'
<STAThread()> Sub Main()
' Change Console properties to make it obvious that
' the application is starting.
Console.Clear()
' Move it to the upper left corner of the screen.
Console.SetWindowPosition(0, 0)
' Make it very large.
Console.SetWindowSize(Console.LargestWindowWidth - 24, _
Console.LargestWindowHeight - 16)
Console.WriteLine("Welcome.")
Console.WriteLine("This application demonstrates the FileInfo.MoveTo method.")
Console.WriteLine("Press any key to start.")
Dim s As String = Console.ReadLine()
Console.Write(" Checking whether ")
Console.Write(sourcePath)
Console.WriteLine(" exists.")
Dim fInfo As FileInfo = New FileInfo(sourcePath)
EnsureSourceFileExists()
DisplayFileProperties(fInfo)
Console.WriteLine("Preparing to move the file to ")
Console.Write(destPath)
Console.WriteLine(".")
MoveFile(fInfo)
DisplayFileProperties(fInfo)
Console.WriteLine("Preparing to delete directories.")
DeleteFiles()
Console.WriteLine("Press the ENTER key to close this application.")
s = Console.ReadLine()
End Sub
'
' Moves the supplied FileInfo instance to destPath.
'
Private Sub MoveFile(ByVal fInfo As FileInfo)
Try
fInfo.MoveTo(destPath)
Console.WriteLine("File moved to ")
Console.WriteLine(destPath)
Catch ex As Exception
DisplayException(ex)
End Try
End Sub
'
' Ensures that the test directories
' and the file FromFile.xml all exist.
'
Private Sub EnsureSourceFileExists()
' Create a FileInfo instance, and get the full path
' to the parent directory.
Dim fInfo As FileInfo = New FileInfo(sourcePath)
Dim dirPath As String = fInfo.Directory.FullName
' If the directory does not exist, create it.
If Not Directory.Exists(dirPath) Then
Directory.CreateDirectory(dirPath)
End If
' If DestFile.xml exists, delete it.
If File.Exists(destPath) Then
File.Delete(destPath)
End If
Console.Write("Creating file ")
Console.Write(fInfo.FullName)
Console.WriteLine(".")
Try
If Not fInfo.Exists Then
' Call WriteFileContent to create the file.
Console.WriteLine("Adding data to the file.")
WriteFileContent(10)
Console.WriteLine("Successfully created the file.")
End If
Catch ex As Exception
DisplayException(ex)
Finally
dirPath = Nothing
fInfo = Nothing
End Try
End Sub
'
' Creates and saves an Xml file to sourcePath.
'
Private Sub WriteFileContent(ByVal totalElements As Integer)
Dim doc As New XmlDocument()
doc.PreserveWhitespace = True
doc.AppendChild(doc.CreateXmlDeclaration("1.0", Nothing, "yes"))
doc.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
Dim root As XmlElement = doc.CreateElement("FileInfo.MoveTo")
Dim index As Integer = 0
Dim elem As XmlElement
While index < totalElements
elem = doc.CreateElement("MyElement")
elem.SetAttribute("Index", index.ToString())
elem.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
elem.AppendChild(doc.CreateTextNode(String.Format _
("MyElement at position {0}.", index)))
elem.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
root.AppendChild(elem)
index += 1
End While
doc.AppendChild(root)
doc.AppendChild(doc.CreateWhitespace(ControlChars.CrLf))
doc.Save(sourcePath)
End Sub
'
' Displays FullName, CreationTime, and LastWriteTime of the supplied
' FileInfo instance, then displays the text of the file.
'
Private Sub DisplayFileProperties(ByVal fInfo As FileInfo)
Console.WriteLine("The FileInfo instance shows these property values.")
Dim reader As StreamReader = Nothing
Try
Console.Write("FullName: ")
Console.WriteLine(fInfo.FullName)
Console.Write("CreationTime: ")
Console.WriteLine(fInfo.CreationTime)
Console.Write("LastWriteTime: ")
Console.WriteLine(fInfo.LastWriteTime)
Console.WriteLine()
Console.WriteLine("File contents:")
Console.WriteLine()
reader = New StreamReader(fInfo.FullName)
While Not reader.EndOfStream
Console.WriteLine(reader.ReadLine())
End While
Console.WriteLine()
Catch ex As Exception
DisplayException(ex)
Finally
If Not reader Is Nothing Then
reader.Close()
reader = Nothing
End If
End Try
End Sub
'
' Deletes the test directory and all its files and subdirectories.
'
Private Sub DeleteFiles()
Try
Dim dInfo As DirectoryInfo = New DirectoryInfo(Environment.GetFolderPath _
(Environment.SpecialFolder.MyDocuments) + "\FileInfoTestDirectory")
If dInfo.Exists Then
dInfo.Delete(True)
Console.WriteLine("Successfully deleted directories and files.")
End If
dInfo = Nothing
Catch ex As Exception
DisplayException(ex)
End Try
End Sub
'
' Displays information about the supplied Exception. This
' code is not suitable for production applications.
'
Private Sub DisplayException(ByVal ex As Exception)
Dim sb As New StringBuilder("An exception of type """)
sb.Append(ex.GetType().FullName)
sb.Append(""" has occurred.")
sb.Append(ControlChars.CrLf)
sb.Append(ex.Message)
sb.Append(ControlChars.CrLf)
sb.Append("Stack trace information:")
sb.Append(ControlChars.CrLf)
Dim matchCol As MatchCollection = Regex.Matches(ex.StackTrace, _
"(at\s)(.+)(\.)([^\.]*)(\()([^\)]*)(\))((\sin\s)(.+)(:line )([\d]*))?")
Dim L As Integer = matchCol.Count
Dim y, K As Integer
Dim argList() As String
Dim matchObj As Match
Dim x As Integer = 0
While x < L
matchObj = matchCol(x)
sb.Append(ControlChars.CrLf)
sb.Append(ControlChars.CrLf)
sb.Append(matchObj.Result("$1 $2$3$4$5"))
argList = matchObj.Groups(6).Value.Split(New Char() {","})
K = argList.Length
y = 0
While y < K
sb.Append(ControlChars.CrLf)
sb.Append(" ")
sb.Append(argList(y).Trim().Replace(" ", " "))
sb.Append(",")
y += 1
End While
sb.Remove(sb.Length - 1, 1)
sb.Append(ControlChars.CrLf)
If 0 < matchObj.Groups(8).Length Then
sb.Append(ControlChars.CrLf)
sb.Append(matchObj.Result("$10"))
sb.Append(ControlChars.CrLf)
sb.Append(matchObj.Result("line $12"))
End If
x += 1
End While
argList = Nothing
matchObj = Nothing
matchCol = Nothing
Console.WriteLine(sb.ToString())
sb = Nothing
Return
End Sub
End Module
' Welcome.
' This application demonstrates the FileInfo.MoveTo method.
' Press any key to start.
'
' Checking whether C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml exists.
' Creating file C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml.
' Adding data to the file.
' Successfully created the file.
' The FileInfo instance shows these property values.
' FullName: C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\MoveFrom\FromFile.xml
' CreationTime: 4/18/2006 1:38:19 PM
' LastWriteTime: 4/18/2006 1:38:19 PM
'
' File contents:
'
' <?xml version="1.0" standalone="yes"?>
' <FileInfo.MoveTo><MyElement Index="0">
' MyElement at position 0.
' </MyElement><MyElement Index="1">
' MyElement at position 1.
' </MyElement><MyElement Index="2">
' MyElement at position 2.
' </MyElement><MyElement Index="3">
' MyElement at position 3.
' </MyElement><MyElement Index="4">
' MyElement at position 4.
' </MyElement><MyElement Index="5">
' MyElement at position 5.
' </MyElement><MyElement Index="6">
' MyElement at position 6.
' </MyElement><MyElement Index="7">
' MyElement at position 7.
' </MyElement><MyElement Index="8">
' MyElement at position 8.
' </MyElement><MyElement Index="9">
' MyElement at position 9.
' </MyElement></FileInfo.MoveTo>
'
' Preparing to move the file to
' C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\DestFile.xml.
' File moved to
' C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\DestFile.xml
' The FileInfo instance shows these property values.
' FullName: C:\Documents and Settings\MyComputer\My Documents\FileInfoTestDirectory\DestFile.xml
' CreationTime: 4/18/2006 1:38:19 PM
' LastWriteTime: 4/18/2006 1:38:19 PM
'
' File contents:
'
' <?xml version="1.0" standalone="yes"?>
' <FileInfo.MoveTo><MyElement Index="0">
' MyElement at position 0.
' </MyElement><MyElement Index="1">
' MyElement at position 1.
' </MyElement><MyElement Index="2">
' MyElement at position 2.
' </MyElement><MyElement Index="3">
' MyElement at position 3.
' </MyElement><MyElement Index="4">
' MyElement at position 4.
' </MyElement><MyElement Index="5">
' MyElement at position 5.
' </MyElement><MyElement Index="6">
' MyElement at position 6.
' </MyElement><MyElement Index="7">
' MyElement at position 7.
' </MyElement><MyElement Index="8">
' MyElement at position 8.
' </MyElement><MyElement Index="9">
' MyElement at position 9.
' </MyElement></FileInfo.MoveTo>
'
' Preparing to delete directories.
' Successfully deleted directories and files.
' Press the ENTER key to close this application.
Poznámky
Tato metoda funguje na diskových svazcích. Soubor c:\MyFile.txt můžete například přesunout do složky d:\public a přejmenovat NewFile.txt.
Viz také
- Vstupně-výstupní operace souborů a Stream
- Postupy: Čtení textu ze souboru
- Postupy: Zápis textu do souboru
Platí pro
Spolupracujte s námi na GitHubu
Zdroj tohoto obsahu najdete na GitHubu, kde můžete také vytvářet a kontrolovat problémy a žádosti o přijetí změn. Další informace najdete v našem průvodci pro přispěvatele.
Váš názor
Připravujeme: V průběhu roku 2024 budeme postupně vyřazovat problémy z GitHub coby mechanismus zpětné vazby pro obsah a nahrazovat ho novým systémem zpětné vazby. Další informace naleznete v tématu: https://aka.ms/ContentUserFeedback.
Odeslat a zobrazit názory pro