Registry.CurrentUser.CreateSubKey (creates a Key if does not exists but i want only to read)

Naeem Khan

17y8.8kSQL

hello every one , i have one big problem . if i remove my registry key from regedit then next time software automatically create registry key . but i want that if registry does not exists then software should not be open . if it possible then let me know and my code is there RegistryKey regKeyAppRoot = Registry.CurrentUser.CreateSubKey("Software"); String GUID=(String)regKeyAppRoot.GetValue("KEY"); if (GUID == "CF91F736-2830-4233-9EC9-9C2AE482B650") { //code } else { MessageBox.Show(""); this.Close(); } Its urgent Reply me As soon as Possible Thanks in Advance

3 Replies

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Nilanka Dharmadasa17y ago
Accepted answer
Hey Naim,

You are back..

Why don't u use opensubkey method to read the key as i mentioned in your previous thread?

RegistryKey regKeyAppRoot = Registry.CurrentUser.OpenSubKey("........");

if( (regKeyAppRoot != null) && (regKeyAppRoot.GetValue("KEY") != null){
String GUID=(String)regKeyAppRoot.GetValue("KEY");
if (GUID == "CF91F736-2830-4233-9EC9-9C2AE482B650")
{ //code }

else
{ MessageBox.Show("");
this.Close();
}
}
else{
MessageBox.Show("");
this.Close();
}

For more info go to this link.It provides a detailed explaination.
http://www.codeproject.com/KB/system/registry1.aspx?msg=812147
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Kirtan Patel17y ago
Hi ,Friend Here is Solution to your Problem

Here is Rectified Code of yours

if my answer helps you then check Do you like this answer :)

RegistryKey regKeyAppRoot =Registry.CurrentUser.OpenSubKey("Software",true);

            string GUID = regKeyAppRoot.GetValue("KEY", "").ToString();

            if(GUID == "CF91F736-2830-4233-9EC9-9C2AE482B650")

            {

                MessageBox.Show("Key Matched !!");

            }

            else if(GUID == "")

            {

                MessageBox.Show("KeyNot Found!!");

                //Do Whatever you want here if Key Not Found

                this.Close();

            }

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Serban Cosmin17y ago
I think you should first try to open that key using the RegistryKey.OpenSubKey method, which is documented here : http://msdn.microsoft.com/en-us/library/xthy8s8d.aspx. If this method returns a null value it means that the key does not exist and you should create it by calling CreateSubKey. Hope this helps. Don't forget to mark this answer accepted if it helped you.
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