winform中.用户第一次登陆后输入了用户名及口令.
以二进制形式保存在ini的文件中,
下次登陆的时候可以的从ini文件中找到上次输入的用户名,用户只用输入口令即可.
如果用户更改了用户名,ini文件中存储的信息也要跟着变化..??如何实现????我以前是放在注册表中来实现的...
以二进制形式保存在ini的文件中,
下次登陆的时候可以的从ini文件中找到上次输入的用户名,用户只用输入口令即可.
如果用户更改了用户名,ini文件中存储的信息也要跟着变化..??如何实现????我以前是放在注册表中来实现的...
查一下System.XML命名空间,.NET操作XML很方便了
用ini也行,操作ini得用api,这是一个类,你整理一下就行
using System;
using System.Text;
using System.Collections;
using System.Runtime.InteropServices;namespace testApplication1 {
public class IniReader {
[DllImport("KERNEL32.DLL", EntryPoint="GetPrivateProfileIntA", CharSet=CharSet.Ansi)]
private static extern int GetPrivateProfileInt(string lpApplicationName, string lpKeyName, int nDefault, string lpFileName);
[DllImport("KERNEL32.DLL", EntryPoint="WritePrivateProfileStringA", CharSet=CharSet.Ansi)]
private static extern int WritePrivateProfileString (string lpApplicationName, string lpKeyName, string lpString, string lpFileName);
[DllImport("KERNEL32.DLL", EntryPoint="GetPrivateProfileStringA", CharSet=CharSet.Ansi)]
private static extern int GetPrivateProfileString (string lpApplicationName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName);
[DllImport("KERNEL32.DLL", EntryPoint="GetPrivateProfileSectionNamesA", CharSet=CharSet.Ansi)]
private static extern int GetPrivateProfileSectionNames (byte[] lpszReturnBuffer, int nSize, string lpFileName);
[DllImport("KERNEL32.DLL", EntryPoint="WritePrivateProfileSectionA", CharSet=CharSet.Ansi)]
private static extern int WritePrivateProfileSection (string lpAppName, string lpString, string lpFileName);
public IniReader(string file) {
Filename = file;
}
public string Filename {
get {
return m_Filename;
}
set {
m_Filename = value;
}
}
public string Section {
get {
return m_Section;
}
set {
m_Section = value;
}
}
public int ReadInteger(string section, string key, int defVal) {
return GetPrivateProfileInt(section, key, defVal, Filename);
}
public int ReadInteger(string section, string key) {
return ReadInteger(section, key, 0);
}
public int ReadInteger(string key, int defVal) {
return ReadInteger(Section, key, defVal);
}
public int ReadInteger(string key) {
return ReadInteger(key, 0);
}
public string ReadString(string section, string key, string defVal) {
StringBuilder sb = new StringBuilder(MAX_ENTRY);
int Ret = GetPrivateProfileString(section, key, defVal, sb, MAX_ENTRY, Filename);
return sb.ToString();
}
public string ReadString(string section, string key) {
return ReadString(section, key, "");
}
public string ReadString(string key) {
return ReadString(Section, key);
}
public long ReadLong(string section, string key, long defVal) {
return long.Parse(ReadString(section, key, defVal.ToString()));
}
public long ReadLong(string section, string key) {
return ReadLong(section, key, 0);
}
public long ReadLong(string key, long defVal) {
return ReadLong(Section, key, defVal);
}
public long ReadLong(string key) {
return ReadLong(key, 0);
}
public byte[] ReadByteArray(string section, string key) {
try {
return Convert.FromBase64String(ReadString(section, key));
} catch {}
return null;
}
public byte[] ReadByteArray(string key) {
return ReadByteArray(Section, key);
}
public bool ReadBoolean(string section, string key, bool defVal) {
return Boolean.Parse(ReadString(section, key, defVal.ToString()));
}
public bool ReadBoolean(string section, string key) {
return ReadBoolean(section, key, false);
}
public bool ReadBoolean(string key, bool defVal) {
return ReadBoolean(Section, key, defVal);
}
public bool ReadBoolean(string key) {
return ReadBoolean(Section, key);
}
public bool Write(string section, string key, int value) {
return Write(section, key, value.ToString());
}
public bool Write(string key, int value) {
return Write(Section, key, value);
}
public bool Write(string section, string key, string value) {
return (WritePrivateProfileString(section, key, value, Filename) != 0);
}
public bool Write(string key, string value) {
return Write(Section, key, value);
}
public bool Write(string section, string key, long value) {
return Write(section, key, value.ToString());
}
public bool Write(string key, long value) {
return Write(Section, key, value);
}
public bool Write(string section, string key, byte [] value) {
if (value == null)
return Write(section, key, (string)null);
else
return Write(section, key, value, 0, value.Length);
}
public bool Write(string key, byte [] value) {
return Write(Section, key, value);
}
public bool Write(string section, string key, byte [] value, int offset, int length) {
if (value == null)
return Write(section, key, (string)null);
else
return Write(section, key, Convert.ToBase64String(value, offset, length));
}
public bool Write(string section, string key, bool value) {
return Write(section, key, value.ToString());
}
public bool Write(string key, bool value) {
return Write(Section, key, value);
}
public bool DeleteKey(string section, string key) {
return (WritePrivateProfileString(section, key, null, Filename) != 0);
}
public bool DeleteKey(string key) {
return (WritePrivateProfileString(Section, key, null, Filename) != 0);
}
public bool DeleteSection(string section) {
return WritePrivateProfileSection(section, null, Filename) != 0;
}
public ArrayList GetSectionNames() {
try {
byte[] buffer = new byte[MAX_ENTRY];
GetPrivateProfileSectionNames(buffer, MAX_ENTRY, Filename);
string [] parts = Encoding.ASCII.GetString(buffer).Trim('\0').Split('\0');
return new ArrayList(parts);
} catch {}
return null;
}
private string m_Filename;
private string m_Section;
private const int MAX_ENTRY = 32768;
}
}