{"Buffer cannot be null. (Parameter 'buffer')"} exception when opening DB

[wismna]

{"Buffer cannot be null. (Parameter 'buffer')"} exception when opening DB

[RiggerJay]

I guess never mind... this was meant for ModernKeypassLib

[wismna]

Hi,

I work on both, so don't worry. I will create a Readme file on the ModernKeePassLib project explaining how to use it. I agree it's not as easy as it looks, because I tried to do minimal changes in the original code, so the workflow can be a bit twisted.
The thing is, you can't use a file path to create a IOConnectionInfo. Instead, IOConnectionInfo requires a byte array, like so:

var ioConnection = IOConnectionInfo.FromByteArray(byte_array);

Then you can open your database.
(I did this to remove the dependency on the file system.)

[wismna]

Hi,

I updated the readme to give info on how to use the library.
Please let me know if this works for you.
Readme

[suanmb]

`var dbpath = @"c:\Database2.kdbx";
//var keypath = @"\xxx\Desktop\KeePassDatabase\Database.key";
var masterpw = "123456";

var ioConnInfo = IOConnectionInfo.FromByteArray(File.ReadAllBytes(dbpath));
var compKey = new CompositeKey();
compKey.AddUserKey(new KcpPassword(masterpw));
//compKey.AddUserKey(new KcpKeyFile(IOConnectionInfo.FromPath(keypath)));

var db = new PwDatabase();
db.Open(ioConnInfo, compKey, new NullStatusLogger());

//var kpdata = from entry in db.RootGroup.GetEntries(true)
// select new
// {
// Group = entry.ParentGroup.Name,
// Title = entry.Strings.ReadSafe("Title"),
// Username = entry.Strings.ReadSafe("UserName"),
// Password = entry.Strings.ReadSafe("Password"),
// };

//Console.WriteLine(string.Join(Environment.NewLine, kpdata));
db.Close();`

I used the above code, but why would it give me this error?

未经处理的异常: System.InvalidOperationException: 节点类型 Attribute 上不支持 ReadElementContentAsString 方法。 行 34，位置 19。
在 System.Xml.XmlReader.SetupReadElementContentAsXxx(String methodName)
在 System.Xml.XmlReader.ReadElementContentAsString()
在 ModernKeePassLib.Serialization.KdbxFile.ReadBase64(XmlReader xr, Boolean bRaw)
在 ModernKeePassLib.Serialization.KdbxFile.ReadProtectedBinary(XmlReader xr)
在 ModernKeePassLib.Serialization.KdbxFile.ReadXmlElement(KdbContext ctx, XmlReader xr)
在 ModernKeePassLib.Serialization.KdbxFile.ReadDocumentStreamed(XmlReader xr, Stream sParentStream)
在 ModernKeePassLib.Serialization.KdbxFile.ReadXmlStreamed(Stream sXml, Stream sParent)
在 ModernKeePassLib.Serialization.KdbxFile.Load(Stream sSource, KdbxFormat fmt, IStatusLogger slLogger)
在 ModernKeePassLib.PwDatabase.Open(IOConnectionInfo ioSource, CompositeKey pwKey, IStatusLogger slLogger)
在 ConsoleApp1.Program.Main(String[] args) 位置 C:\Users\ygct\source\repos\ConsoleApp1\ConsoleApp1\Program.cs:行号 28请按任意键继 续. . .