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Registry R/W in C#
C# has a nice wrap for registry manipulations. The usage of the registry under C# is fairly easy, and opens the world of the registry for your application to use for reading and/or writing. For our example, lets not use any reg key that is important, so that we will not (by accident of course) spoil anything in there. Open regedit.exe and navigate to HKEY_LOCAL_MACHINE\software and create your own sub-key there, call it "MyTestRegKey" Create 2 string values inside this key, name one "Name" and one "Password", and assign them the string values - "Guest", "123456" respectively. Now you should have 2 values at location: "HKEY_LOCAL_MACHINE\software\MyTestRegKey\". So lets create a function which reads them. using Microsoft.Win32; public void ReadMyTestRegKey() { regkey = Registry.LocalMachine.OpenSubKey(@"Software\MyTestRegKey"); string[] valnames = regkey.GetValueNames(); string val1 = (string)regkey.GetValue(valnames[1]); } Very easy and clean. The OpenSubKey method returns a Registry Key that is Locked for changes, so if we mean in our function to edit the key as well, we should use the overloaded OpenSubKey which takes not only the registry key, but a bool variable who states if we want to be able to edit whats in there. A different method called CreateSubKey has only one form, which takes a registry location, the difference with OpenSubKey is that if the KEY in the registry does not exist it is created, while OpenSubKey return null if the key was not found. on the key that has returned, you can set new values, open new sub keys, and to them new values and sub keys and so on: public void ReadMyTestRegKey() { RegistryKey regkey;/* new Microsoft.Win32 Registry Key */ regkey = Registry.LocalMachine.CreateSubKey(@"Software\MyTestRegKey"); /*regkey = Registry.LocalMachine.OpenSubKey(@"Software\MyTestRegKey");*/ string[] valnames = regkey.GetValueNames(); string val0 = (string)regkey.GetValue(valnames[0]); string val1 = (string)regkey.GetValue(valnames[1]); }
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