C#操作注册表的方法
1.读取指定名称的注册表的值
private string getregistdata(string name)
{
string registdata;
registrykey hkml = registry.localmachine;
registrykey software = hkml.opensubkey("software",true);
registrykey aimdir = software.opensubkey("xxx",true);
registdata = aimdir.getvalue(name).tostring();
return registdata;
}
以上是读取的注册表中hkey_local_machine\software目录下的xxx目录中名称为name的注册表值;
2.向注册表中写数据
private void wtregedit(string name,string tovalue)
{
registrykey hklm = registry.localmachine;
registrykey software = hklm.opensubkey("software",true);
registrykey aimdir = software.createsubkey("xxx");
aimdir.setvalue(name,tovalue);
}
以上是在注册表中hkey_local_machine\software目录下新建xxx目录并在此目录下创建名称为name值为tovalue的注册表项;
3.删除注册表中指定的注册表项
private void deleteregist(string name)
{
string[] aimnames;
registrykey hkml = registry.localmachine;
registrykey software = hkml.opensubkey("software",true);
registrykey aimdir = software.opensubkey("xxx",true);
aimnames = aimdir.getsubkeynames();
foreach(string aimkey in aimnames)
{
if(aimkey == name)
aimdir.deletesubkeytree(name);
}
}
以上是在注册表中hkey_local_machine\software目录下xxx目录中删除名称为name注册表项;
4.判断指定注册表项是否存在
private bool isregeditexit(string name)
{
bool _exit = false;
string[] subkeynames;
registrykey hkml = registry.localmachine;
registrykey software = hkml.opensubkey("software",true);
registrykey aimdir = software.opensubkey("xxx",true);
subkeynames = aimdir.getsubkeynames();
foreach(string keyname in subkeynames)
{
if(keyname == name)
{
_exit = true;
return _exit;
}
}
return _exit;
}
以上是在注册表中hkey_local_machine\software目录下xxx目录中判断名称为name注册表项是否存在,这一方法在删除注册表时已经存在,在新建一注册表项时也应有相应判断;
using system.windows.forms;
using microsoft.win32;
namespace regeditmanager
{
public partial class form1 : form
{
public form1()
{
initializecomponent();
}
//创建并写入
private void button1_click(object sender, eventargs e)
{
registrykey key = registry.localmachine;
try
{
registrykey software = key.createsubkey("software\\labmanager");
software = key.opensubkey("software\\labmanager", true);
software.setvalue("address", @"c:\program files\实验室管理系统\dbcom.xml");
}
catch (exception ex)
{
messagebox.show(ex.tostring());
}
finally
{
key.close();
}
}
//读取
private void button2_click(object sender, eventargs e)
{
string info = string.empty;
registrykey key=registry.localmachine;
try
{
key = key.opensubkey("software\\labmanager");
if (isregeditkeyexit("software\\labmanager", "address"))
{
info = key.getvalue("address").tostring();
messagebox.show("注册表里的信息为:" + info);
}
else
{
messagebox.show("键值address不存在;");
}
}
catch (exception ex)
{
messagebox.show(ex.tostring());
}
finally
{
key.close();
}
}
//删除
private void button3_click(object sender, eventargs e)
{
registrykey key = registry.localmachine;
try
{
key = key.opensubkey("software\\labmanager",true);
if (isregeditkeyexit("software\\labmanager", "address"))
{
key.deletevalue("address");
messagebox.show("删除成功");
}
else
{
messagebox.show("键值address不存在;");
}
}
catch (exception ex)
{
messagebox.show(ex.tostring());
}
finally
{
key.close();
}
}
/// <summary>
/// 判断键值是否存在
/// </summary>
/// <param name="registrystr">注册表项</param>
/// <param name="keystr">键值</param>
/// <returns></returns>
private bool isregeditkeyexit(string registrystr,string keystr)
{
string[] subkeynames;
registrykey hkml = registry.localmachine;
registrykey software = hkml.opensubkey(registrystr);
subkeynames = software.getvaluenames();
foreach (string keyname in subkeynames)
{
if (keyname == keystr) //判断键值的名称
{
hkml.close();
return true;
}
}
hkml.close();
return false;
}
/// <summary>
/// 判断注册表项是否存在
/// </summary>
/// <param name="registryname">例如:software</param>
/// <param name="valuestr">例如:labmanager</param>
/// <returns></returns>
private bool isregedititemexist(string registryname,string valuestr)
{
string[] subkeynames;
registrykey hkml = registry.localmachine;
registrykey software = hkml.opensubkey(registryname);
subkeynames = software.getsubkeynames();
//取得该项下所有子项的名称的序列,并传递给预定的数组中
foreach (string keyname in subkeynames) //遍历整个数组
{
if (keyname == valuestr) //判断子项的名称
{
hkml.close();
return true;
}
}
hkml.close();
return false;
}
}
}
上一篇: c#窗体简易倒计时器