C # registry operation method

(1) Write

1. Create a file

Create a Registry File: *. Reg with the following content:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE \ SOFTWARE \ test]

"Server" = "192.168.66.22"

"Database" = "northwind"

"User" = "Xiaowang"

"Password" = "123456"

Where:

I.

[HKEY_LOCAL_MACHINE \ SOFTWARE \ test]: indicates the path. If the path does not exist, the system automatically creates the path.

II.

"Server" = "192.168.66.22"

"Database" = "northwind"

"User" = "Xiaowang"

"Password" = "123456"

Keys and values. Keys on the left and keys on the right. Read data by key during reading.

2. Double-click to run. It will automatically put the key value under the configured path.

(2) reading

Open the namespace: using Microsoft. Win32;

1. Method

// Parameter 1 indicates the path. For example, HKEY_LOCAL_MACHINE \ Software

// Parameter 2 indicates the key. Custom

Public static object getregvalue (string strregpath, string strname)

{

Strregpath = strregpath. Trim ();

// Recipient

Object objret;

// If the name is null, an exception is thrown.

If (strname = "")

{

Throw new argumentnullexception (strname, "the key value cannot be blank! ");

}

// Remove the "\" Character

If (strregpath. startswith ("\\"))

{

Strregpath = strregpath. substring (1, strregpath. Length-1 );

}

If (strregpath. endswith ("\\"))

{

Strregpath = strregpath. substring (0, strregpath. Length-1 );

}

// Split the root key and Path

String strrootkey, strpath;

Int intindex = strregpath. indexof ("\\");

Strrootkey = strregpath. substring (0, intloc). toupper ();

Strpath = strregpath. substring (intindex + 1, strregpath. Length-intindex-1 );

Registrykey _ root;

Switch (strrootkey)

{

Case "hkey_classes_root ":

_ Root = registry. classesroot;

Break;

Case "hkey_current_config ":

_ Root = registry. currentconfig;

Break;

Case "HKEY_CURRENT_USER ":

_ Root = registry. currentuser;

Break;

Case "hkey_dyn_data ":

_ Root = registry. dyndata;

Break;

Case "HKEY_LOCAL_MACHINE ":

_ Root = registry. localmachine;

Break;

Case "hkey_performance_data ":

_ Root = registry. performancedata;

Break;

Case "HKEY_USERS ":

_ Root = registry. users;

Break;

Default:

Throw new exception ("path not found! ");

}

Try

{

// Open the Registry path key

Registrykey regkey = _ root. opensubkey (@ strpath );

// Value

Objret = regkey. getvalue (strname );

}

Catch (exception E)

{

Throw E;

}

Return objret;

}

2. Usage:

String strconnectstring = getregvalue (@ "HKEY_LOCAL_MACHINE \ SOFTWARE \ test", "strconnstring"). tostring ();