| private InternalCopy ( String sourceFileName, String destFileName, bool overwrite ) : String | ||
| sourceFileName | String | |
| destFileName | String | |
| overwrite | bool | |
| Résultat | String | |
/// <summary>将现有文件复制到新文件，允许覆盖现有文件。</summary>
/// <returns>为新文件；如果 <paramref name="overwrite" /> 是 true，则为现有文件的覆盖。如果文件存在且 <paramref name="overwrite" /> 为 false，则引发 <see cref="T:System.IO.IOException" />。</returns>
/// <param name="destFileName">要复制到的新文件的名称。</param>
/// <param name="overwrite">如果允许覆盖现有文件，则为 true；否则为 false。</param>
/// <exception cref="T:System.ArgumentException">
/// <paramref name="destFileName" /> 为空，仅包含空白，或包含无效字符。</exception>
/// <exception cref="T:System.IO.IOException">发生错误，或者目标文件已经存在，并且 <paramref name="overwrite" /> 为 false。</exception>
/// <exception cref="T:System.Security.SecurityException">调用方没有所要求的权限。</exception>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="destFileName" /> 为 null。</exception>
/// <exception cref="T:System.IO.DirectoryNotFoundException">
/// <paramref name="destFileName" /> 中指定的目录不存在。</exception>
/// <exception cref="T:System.UnauthorizedAccessException">传入了一个目录路径，或者正在将文件移动到另一个驱动器。</exception>
/// <exception cref="T:System.IO.PathTooLongException">指定的路径、文件名或者两者都超出了系统定义的最大长度。例如，在基于 Windows 的平台上，路径必须小于 248 个字符，文件名必须小于 260 个字符。</exception>
/// <exception cref="T:System.NotSupportedException">
/// <paramref name="destFileName" /> 字符串中间有一个冒号 (:)。</exception>
/// <filterpriority>1</filterpriority>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public FileInfo CopyTo(string destFileName, bool overwrite)
{
if (destFileName == null)
{
throw new ArgumentNullException("destFileName", Environment.GetResourceString("ArgumentNull_FileName"));
}
if (destFileName.Length == 0)
{
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyFileName"), "destFileName");
}
destFileName = File.InternalCopy(this.FullPath, destFileName, overwrite, true);
return(new FileInfo(destFileName, false));
}
public FileInfo CopyTo(string destFileName)
{
if (destFileName == null)
{
throw new ArgumentNullException(nameof(destFileName), SR.ArgumentNull_FileName);
}
if (destFileName.Length == 0)
{
throw new ArgumentException(SR.Argument_EmptyFileName, nameof(destFileName));
}
return(new FileInfo(File.InternalCopy(FullPath, destFileName, false), isNormalized: true));
}
// Copies an existing file to a new file. If overwrite is
// false, then an IOException is thrown if the destination file
// already exists. If overwrite is true, the file is
// overwritten.
//
// The caller must have certain FileIOPermissions. The caller must have
// Read permission to sourceFileName and Create
// and Write permissions to destFileName.
//
public FileInfo CopyTo(string destFileName, bool overwrite)
{
if (destFileName == null)
{
throw new ArgumentNullException(nameof(destFileName), SR.ArgumentNull_FileName);
}
if (destFileName.Length == 0)
{
throw new ArgumentException(SR.Argument_EmptyFileName, nameof(destFileName));
}
Contract.EndContractBlock();
return(new FileInfo(File.InternalCopy(FullPath, destFileName, overwrite), isNormalized: true));
}
public FileInfo CopyTo(String destFileName)
{
if (destFileName == null)
{
throw new ArgumentNullException("destFileName", Environment.GetResourceString("ArgumentNull_FileName"));
}
if (destFileName.Length == 0)
{
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyFileName"), "destFileName");
}
Contract.EndContractBlock();
destFileName = File.InternalCopy(FullPath, destFileName, false, true);
return(new FileInfo(destFileName, false));
}
// Copies an existing file to a new file. An exception is raised if the
// destination file already exists. Use the
// Copy(String, String, boolean) method to allow
// overwriting an existing file.
//
// The caller must have certain FileIOPermissions. The caller must have
// Read permission to sourceFileName
// and Write permissions to destFileName.
//
public FileInfo CopyTo(String destFileName)
{
if (destFileName == null)
{
throw new ArgumentNullException(nameof(destFileName), SR.ArgumentNull_FileName);
}
if (destFileName.Length == 0)
{
throw new ArgumentException(SR.Argument_EmptyFileName, nameof(destFileName));
}
Contract.EndContractBlock();
destFileName = File.InternalCopy(FullPath, destFileName, false);
return(new FileInfo(destFileName, null));
}
// Copies an existing file to a new file. If overwrite is
// false, then an IOException is thrown if the destination file
// already exists. If overwrite is true, the file is
// overwritten.
//
//| <include file='doc\FileInfo.uex' path='docs/doc[@for="FileInfo.CopyTo1"]/*' />
public FileInfo CopyTo(String !destFileName, bool overwrite)
{
destFileName = File.InternalCopy(FullPath, destFileName, overwrite);
return(new FileInfo(destFileName, false));
}
