Saving content of a treeview to a file and load it later
In my C# WinForms program I have a treeview that only contains parent nodes (so, no childs) it is like a listbox but I needed it because of haveing differet properties of nodes like Name, Tag and Text.
No I want to be able to save the content of this treeview into a file (Basically a text file which I call it *.MVIA). The question is what is the best way to save all three properties of nodes in a file so it can loaded again later properly?
At the moment I came with this idea :
开发者_JS百科 private void menuFileSave_Click(object sender, EventArgs e)
{
StringBuilder sb = new StringBuilder();
foreach(TreeNode node in treeViewFiles.Nodes)
{
sb.AppendLine(node.Name);
}
SaveFileDialog saveList = new SaveFileDialog();
saveList.DefaultExt = "*.mvia";
saveList.Filter = "MVIA Files|*.mvia";
if (saveList.ShowDialog() == DialogResult.OK)
{
File.WriteAllText(saveList.FileName, sb.ToString());
}
}
As you can see, each Name property of each node will be saved in a line. Now I need to add its Text and Tag property also, but later I have trouble reading it back (Honestly I don't know how to).
Would you give me some ideas what is a best way to save all three property of each node and be able to load it easily later?
Thanks.
You can use BinaryFormatter to Serialize/Deserialize Nodes
public static void SaveTree(TreeView tree, string filename)
{
using (Stream file = File.Open(filename, FileMode.Create))
{
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(file, tree.Nodes.Cast<TreeNode>().ToList());
}
}
public static void LoadTree(TreeView tree, string filename)
{
using (Stream file = File.Open(filename, FileMode.Open))
{
BinaryFormatter bf = new BinaryFormatter();
object obj = bf.Deserialize(file);
TreeNode [] nodeList = (obj as IEnumerable<TreeNode>).ToArray();
tree.Nodes.AddRange(nodeList);
}
}
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