C# Ini文件操作实例
在开源中国看到的操作ini文件的,写的还不看,留着以后用
using system;
using system.io;
using system.runtime.interopservices;
using system.text;
using system.collections;
using system.collections.specialized;
namespace *sky{
/**//**/
/**//// <summary>
/// inifiles的类
/// </summary>
public class inifiles
{
public string filename; //ini文件名
//声明读写ini文件的api函数
[dllimport("kernel32")]
private static extern bool writeprivateprofilestring(string section, string key, string val, string filepath);
[dllimport("kernel32")]
private static extern int getprivateprofilestring(string section, string key, string def, byte[] retval, int size, string filepath);
//类的构造函数,传递ini文件名
public inifiles(string afilename)
{
// 判断文件是否存在
fileinfo fileinfo = new fileinfo(afilename);
//todo:搞清枚举的用法
if ((!fileinfo.exists))
{ //|| (fileattributes.directory in fileinfo.attributes))
//文件不存在,建立文件
system.io.streamwriter sw = new system.io.streamwriter(afilename, false, system.text.encoding.default);
try
{
sw.write("#表格配置档案");
sw.close();
}
catch
{
throw (new applicationexception("ini文件不存在"));
}
}
//必须是完全路径,不能是相对路径
filename = fileinfo.fullname;
}
//写ini文件
public void writestring(string section, string ident, string value)
{
if (!writeprivateprofilestring(section, ident, value, filename))
{
throw (new applicationexception("写ini文件出错"));
}
}
//读取ini文件指定
public string readstring(string section, string ident, string default)
{
byte[] buffer = new byte[65535];
int buflen = getprivateprofilestring(section, ident, default, buffer, buffer.getupperbound(0), filename);
//必须设定0(系统默认的代码页)的编码方式,否则无法支持中文
string s = encoding.getencoding(0).getstring(buffer);
s = s.substring(0, buflen);
return s.trim();
}
//读整数
public int readinteger(string section, string ident, int default)
{
string intstr = readstring(section, ident, convert.tostring(default));
try
{
return convert.toint32(intstr);
}
catch (exception ex)
{
console.writeline(ex.message);
return default;
}
}
//写整数
public void writeinteger(string section, string ident, int value)
{
writestring(section, ident, value.tostring());
}
//读布尔
public bool readbool(string section, string ident, bool default)
{
try
{
return convert.toboolean(readstring(section, ident, convert.tostring(default)));
}
catch (exception ex)
{
console.writeline(ex.message);
return default;
}
}
//写bool
public void writebool(string section, string ident, bool value)
{
writestring(section, ident, convert.tostring(value));
}
//从ini文件中,将指定的section名称中的所有ident添加到列表中
public void readsection(string section, stringcollection idents)
{
byte[] buffer = new byte[16384];
//idents.clear();
int buflen = getprivateprofilestring(section, null, null, buffer, buffer.getupperbound(0),
filename);
//对section进行解析
getstringsfrombuffer(buffer, buflen, idents);
}
private void getstringsfrombuffer(byte[] buffer, int buflen, stringcollection strings)
{
strings.clear();
if (buflen != 0)
{
int start = 0;
for (int i = 0; i < buflen; i++)
{
if ((buffer[i] == 0) && ((i - start) > 0))
{
string s = encoding.getencoding(0).getstring(buffer, start, i - start);
strings.add(s);
start = i + 1;
}
}
}
}
//从ini文件中,读取所有的sections的名称
public void readsections(stringcollection sectionlist)
{
//note:必须得用bytes来实现,stringbuilder只能取到第一个section
byte[] buffer = new byte[65535];
int buflen = 0;
buflen = getprivateprofilestring(null, null, null, buffer,
buffer.getupperbound(0), filename);
getstringsfrombuffer(buffer, buflen, sectionlist);
}
//读取指定的section的所有value到列表中
public void readsectionvalues(string section, namevaluecollection values)
{
stringcollection keylist = new stringcollection();
readsection(section, keylist);
values.clear();
foreach (string key in keylist)
{
values.add(key, readstring(section, key, ""));
}
}
/**/////读取指定的section的所有value到列表中,
//public void readsectionvalues(string section, namevaluecollection values,char splitstring)
//{ string sectionvalue;
// string[] sectionvaluesplit;
// stringcollection keylist = new stringcollection();
// readsection(section, keylist);
// values.clear();
// foreach (string key in keylist)
// {
// sectionvalue=readstring(section, key, "");
// sectionvaluesplit=sectionvalue.split(splitstring);
// values.add(key, sectionvaluesplit[0].tostring(),sectionvaluesplit[1].tostring());
// }
//}
//清除某个section
public void erasesection(string section)
{
//
if (!writeprivateprofilestring(section, null, null, filename))
{
throw (new applicationexception("无法清除ini文件中的section"));
}
}
//删除某个section下的键
public void deletekey(string section, string ident)
{
writeprivateprofilestring(section, ident, null, filename);
}
//note:对于win9x,来说需要实现updatefile方法将缓冲中的数据写入文件
//在win nt, 2000和xp上,都是直接写文件,没有缓冲,所以,无须实现updatefile
//执行完对ini文件的修改之后,应该调用本方法更新缓冲区。
public void updatefile()
{
writeprivateprofilestring(null, null, null, filename);
}
//检查某个section下的某个键值是否存在
public bool valueexists(string section, string ident)
{
//
stringcollection idents = new stringcollection();
readsection(section, idents);
return idents.indexof(ident) > -1;
}
//确保资源的释放
~inifiles()
{
updatefile();
}
}
}
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