实现ASP.NET中TreeView控件的图标节点(Icon in the ASP.NET TreeView Nodes)

客户的提问：

Is there a way to add hover thumbnails to each item in a treeview?

 

public  TreeNode BrowseServer(TreeNode rootNode,  string  path)
{
DirectoryInfo di = new DirectoryInfo(path);
DirectoryInfo[] dicollection = di.GetDirectories();
foreach (DirectoryInfo de in dicollection)
{
TreeNode tn = new TreeNode(de.Name, de.FullName);
rootNode.ChildNodes.Add(tn);
BrowseServer(tn, de.FullName);
}
FileInfo[] ficollection = di.GetFiles();
foreach (FileInfo fe in ficollection)
{
TreeNode tn = new TreeNode(fe.Name, fe.FullName);
rootNode.ChildNodes.Add(tn);
}
return rootNode;
}

Thanks in advance. 

回答：

HI divided

I suggest you try the following way, Hope this helps

change your code:

TreeNode tn = new TreeNode(de.Name, de.FullName);
rootNode.ChildNodes.Add(tn);

to the following code:

 

String strName = " <img id=something src=blah style=display:none; postition it as needed><a οnmοuseοver= " showthepic(control) "  οnmοuseοut= " hide(control) > " ;
strName += de.Name;
strName += ""
TreeNode tn  =   new  TreeNode(strName, de.FullName);
rootNode.ChildNodes.Add(tn);

 

动态生成tree时，要做到服务端代码和客户端代码的协同，内嵌式的HTML标记是不错的选择