Accessing windows registry using C#

[garv84]

i am developing a C# application where i need to save the user input given by the user in a dialog prompt in the registry.then show the output say the font style and color of the text which i have selected in the form should be saved in the registry even when i close the application and open it again.can neone pls help me wth the C# code snippet.thanks.

[Charan]

^^ Do you want to use only registery?
If you want to just store some application data like the ones you have said, you can use App.config file to use it. It is much simpler to store settings in app.config rather than in registery.

edit: Please mention the visual studio version you are using (2003 or 2005)

edit: Please mention the visual studio version you are using (2003 or 2005)

[garv84]

@charan

yes i wan to use the rgistry only.

i want to save the color and font dialog sttings on a text in the registry and when i reopen the application once again ..i want to retreive the same from the reg.

[QwertyManiac]

Application config files would do the same. Why registry specifically?

[Charan]

Ok here you.....
I have created two functions for you.

Use ReadKey for reading a value from registery and SetKey to set the value of a registery. I havent done much testing with various key types but this should give you the kickstart needed.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        SetKey("Software\TestApp", "Color", "Color.Red")
        SetKey("Software\TestApp", "Font", "Times New Roman")
        MessageBox.Show(ReadKey("Software\TestApp", "Font"))
        MessageBox.Show(ReadKey("Software\TestApp", "Color"))
End Sub

    Public Shared Function ReadKey(ByVal Key As String, ByVal SubKey As String) As String
        Dim regKey As Microsoft.Win32.RegistryKey
        Dim ver As String = String.Empty
        Try
            regKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(Key)
            ver = regKey.GetValue(SubKey)
            regKey.Close()
        Catch ex As Exception
            Return False
        End Try
        Return ver
    End Function

    Public Shared Function SetKey(ByVal Key As String, ByVal SubKey As String, ByVal Value As String) As Boolean
        Dim regKey As Microsoft.Win32.RegistryKey
        Try
            regKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(Key, True)
            regKey.SetValue(SubKey, Value)
            regKey.Close()
            Return True
        Catch ex As Exception
            Return False
        End Try
     End Function

[ManishSinha]

Originally Posted by garv84

i am developing a C# application where i need to save the user input given by the user in a dialog prompt in the registry.then show the output say the font style and color of the text which i have selected in the form should be saved in the registry even when i close the application and open it again.can neone pls help me wth the C# code snippet.thanks.

Found this on a site

// Attempt to open the key
RegistryKey key = Registry.CurrentUser.OpenSubKey( "Software\\Play\\WindowPos" );

// If the return value is null, the key doesn't exist
if ( key == null ) 
{
    // The key doesn't exist; create it / open it
    key = Registry.CurrentUser.CreateSubKey( "Software\\Play\\WindowPos" );
}

// Attempt to retrieve the value X; if null is returned, the value
// doesn't exist in the registry.
if ( key.GetValue( "X" ) != null ) 
{
    // The value exists; move the form to the coordinates stored in the
    // registry.
    Location = new Point( (int)key.GetValue( "X" ), (int)key.GetValue( "Y" ) );
}

Originally Posted by Charan

Ok here you.....
I have created two functions for you.

Use ReadKey for reading a value from registery and SetKey to set the value of a registery. I havent done much testing with various key types but this should give you the kickstart needed.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        SetKey("Software\TestApp", "Color", "Color.Red")
        SetKey("Software\TestApp", "Font", "Times New Roman")
        MessageBox.Show(ReadKey("Software\TestApp", "Font"))
        MessageBox.Show(ReadKey("Software\TestApp", "Color"))
End Sub

    Public Shared Function ReadKey(ByVal Key As String, ByVal SubKey As String) As String
        Dim regKey As Microsoft.Win32.RegistryKey
        Dim ver As String = String.Empty
        Try
            regKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(Key)
            ver = regKey.GetValue(SubKey)
            regKey.Close()
        Catch ex As Exception
            Return False
        End Try
        Return ver
    End Function

    Public Shared Function SetKey(ByVal Key As String, ByVal SubKey As String, ByVal Value As String) As Boolean
        Dim regKey As Microsoft.Win32.RegistryKey
        Try
            regKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(Key, True)
            regKey.SetValue(SubKey, Value)
            regKey.Close()
            Return True
        Catch ex As Exception
            Return False
        End Try
     End Function

He asked for a C# code and not a VB code

[garv84]

One more thing i would like to seek u guys help.

i want to watermark a text in a "TEXT BOX",NOT ON AN IMAGE.
can neone pls help me with the C# snippet.thanx a ton.

[Charan]

Originally Posted by ManishSinha

He asked for a C# code and not a VB code

Woops

neway here is the C# Code.

private void Button1_Click(object sender, System.EventArgs e)
{
    SetKey("Software\\TestApp", "Color", "Color.Red");
    SetKey("Software\\TestApp", "Font", "Times New Roman");
    MessageBox.Show(ReadKey("Software\\TestApp", "Font"));
    MessageBox.Show(ReadKey("Software\\TestApp", "Color"));
}
public static string ReadKey(string Key, string SubKey)
{
    Microsoft.Win32.RegistryKey regKey;
    string ver = string.Empty;
    try {
        regKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(Key);
        ver = regKey.GetValue(SubKey);
        regKey.Close();
    }
    catch (Exception ex) {
        return false;
    }
    return ver;
}
public static bool SetKey(string Key, string SubKey, string Value)
{
    Microsoft.Win32.RegistryKey regKey;
    try {
        regKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(Key, true);
        regKey.SetValue(SubKey, Value);
        regKey.Close();
        return true;
    }
    catch (Exception ex) {
        return false;
    }
}

Originally Posted by garv84

One more thing i would like to seek u guys help.
i want to watermark a text in a "TEXT BOX",NOT ON AN IMAGE.

You mean like the foreground of the textbox must have a image ?

[ruturaj3]

Are u talking about Cue textbox. I hav used it in my project.
Cue textbox are textbox in which some text appears when it doesn't focus.
For example, u will se cue textbox in vista. or in opera, in the address bar 'enter web address here'. U can download this control.