string[] mypicture = System.IO.Directory.GetFiles("" + Application.StartupPath + @"\picture", "*.*", System.IO.SearchOption.AllDirectories);
foreach (string mystr in mypicture)
{
string mypic = mystr.Substring(mystr.LastIndexOf("\\") + 1);
string myspilt=mypic.Substring(mypic.LastIndexOf('.')+1).ToLower();
if (myspilt == "jpg" || myspilt == "gif" || myspilt == "bmp")
{
this.treeView1.SelectedNode.Nodes.Add(mypic);
}
}
this.treeView1.SelectedNode.Expand();//展开所有节点；
