Deserialization of MemoryStream via BinaryFormatter

binaryformatter, c#, deserialization, memorystream, treeview

Solution

Try this out

    public static void SaveTree(TreeView tree)
    {
        using (var ms = new MemoryStream())
        {
            new BinaryFormatter().Serialize(ms, tree.Nodes.Cast<TreeNode>().ToList());

            Properties.Settings.Default.tree = Convert.ToBase64String(ms.ToArray());
            Properties.Settings.Default.Save();
        }
    }

    public static void LoadTree(TreeView tree)
    {
        byte[] bytes = Convert.FromBase64String(Properties.Settings.Default.tree);
        using (var ms = new MemoryStream(bytes, 0, bytes.Length))
        {
            ms.Write(bytes, 0, bytes.Length);
            ms.Position = 0;
            var data =  new BinaryFormatter().Deserialize(ms);
            tree.Nodes.AddRange(((List<TreeNode>)data).ToArray());
        }
    }

Problem

didn't find a solution to following problem. I had a working code for saving/loading a TreeView in a file but I want to save it to Properties.Settings.Default. Unfortunately I get the error "no map for object" in this line: ``` object obj = bf.Deserialize(ms); ``` Here is the complete code for (de)serialization: Don't know how to solve this one. :( ``` public static void SaveTreeView(TreeView tree) { using (MemoryStream ms = new MemoryStream()) { BinaryFormatter bf = new BinaryFormatter(); bf.Serialize(ms, tree.Nodes.Cast<TreeNode>().ToList()); ms.Position = 0; var sr = new StreamReader(ms); Properties.Settings.Default.tree = sr.ReadToEnd(); Properties.Settings.Default.Save(); } } public static void LoadTreeView(TreeView tree) { using (MemoryStream ms = new MemoryStream()) { var sw = new StreamWriter(ms); sw.WriteLine(Properties.Settings.Default.tree); sw.Flush(); ms.Seek(0, SeekOrigin.Begin); BinaryFormatter bf = new BinaryFormatter(); object obj = bf.Deserialize(ms); TreeNode[] nodeList = (obj as IEnumerable<TreeNode>).ToArray(); tree.Nodes.AddRange(nodeList); } } ``` Anybody got an idea? Thanks is advance.

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