获取文件的版本信息:
FileVersionInfo myFileVersionInfo1 = FileVersionInfo.GetVersionInfo( "D:\\TEST.DLL" );
textBox1.Text="版本号: " + myFileVersionInfo1.FileVersion;
更改文件属性,删除只读文件:
下例欲将E:\test.txt文件拷贝至D:\tmp\test.txt,但D:\tmp\test.txt已经存在.
string file1="E:\\test.txt";
string destinationFile="d:\\tmp\\test.txt";
if( File.Exists( destinationFile ) )
{
FileInfo fi=new FileInfo( destinationFile );
if( fi.Attributes.ToString( ).IndexOf( "ReadOnly" )!=-1 )
fi.Attributes=FileAttributes.Normal;
File.Delete( destinationFile );
}
File.Copy( file1,destinationFile,true );
C#中字符串的格式化及转换成数值的方法
字符串转换成数字,比如"1234"转换成数字1234:
string str="1234";
int i=Convert.ToInt32( str );
格式化字符串,向长度小于30的字符串末尾添加特定字符,补足n个字符,使用String类的PadRight( int,char )方法:
String str="1234";
str=str.PadRight( 30,' ' )
按行读写文件
判断文件是否存在:File.Exists( string filePath )
判断目录是否存在:Directory.Exists( "D:\\LastestVersion" )
按行读取文件:
int fileCount=0;
StreamReader sr = new StreamReader( textBox1.Text.Trim( ) );
while( sr.Peek( ) > -1 ){
listBox1.Items.Add( sr.ReadLine( ) );
fileCount++;
}
sr.Close( );
按行写入文件:
StreamWriter sw = new StreamWriter( "D:\\result.txt" );
for( int i=0;i<10;i++ )
{
sw.WriteLine( "这是第"+i.ToString( )+"行数据" );
}
文件目录对话框的使用
文件对话框即过滤条件的使用:
string resultFile="";
OpenFileDialog openFileDialog1 = new OpenFileDialog( );
openFileDialog1.InitialDirectory = "D:\\Patch" ;
openFileDialog1.Filter = "All files ( *.* )|*.*|txt files ( *.txt )|*.txt" ;
openFileDialog1.FilterIndex = 2 ;
openFileDialog1.RestoreDirectory = true ;
if( openFileDialog1.ShowDialog( ) == DialogResult.OK )
resultFile=openFileDialog1.FileName;
目录对话框的使用:
string resultFolder="";
FolderBrowserDialog openFolderDialog1=new FolderBrowserDialog( );
openFolderDialog1.RootFolder=Environment.SpecialFolder.MyComputer;
if( openFolderDialog1.ShowDialog( )==DialogResult.OK )
resultFolder=openFolderDialog1.SelectedPath;