First, download the source code
http://www.asp.net/iewebcontrols/iewebControls.exe
Second, installation and compilation
1. After performing the installation file, find the "build.bat" file in the installation directory, and open it with Notepad. Change "CSC.exe" to the absolute path "C: /Winnt/Microsoft.Net/framework/v1.1.4322/csc.exe". After saving (remember to remove the "read-only" property).
2. After the compilation is completed, you can see the "build" binder on the installation directory, copy all the files in the "runtime" subdirectory in this directory to "c: / inetpub / wwwroot / webctrl_client / 1_0" (if not It is created yourself. Note that in the new site in IIS, you must copy the "WebCTRL_CLIENT" directory to the site root directory)
Third, use in vs.net
1. Open vs.net → Right-click "Toolbox" → Add / Remove Project → Browse → Select the above-described file "Microsoft.WebControls.dll" → After confirmation, you can see the added "TreeView" control
2, drag the "TreeView" control into the page → Properties → Node (Node) → Add a root node (or add a child node)
Fourth, read node information from the database
The Table basic structure of the saving node information is
1, all read and demonstrate
Private Void Page_Load (Object Sender, System.EventArgs E)
{
IF (ISPostback)
{
Return;
}
Dbsystem.executesql tmp = new dbsystem.executesql ("t");
DataTable DT = Tmp.GetDataTable ("Select * from treeView"); // Caught data from the database
This.AddNodes (DT, NULL, "0"); // Add node
this.treeView1.selectedNodeIndex = ""; // No node is not selected.
/ * The next section describes how to modify the TreeView.cs source code to cancel the method of default the node * /
}
///
/// Add a node and the child's node
///
/// DataTable captured from the database
/// The parent of the child will be added
/// The ID of the parent node, "0" is root node
Private Void AddNodes (DataTable DT, Treenode Node, String ID)
{
DataRow [] rows = dt.select ("ParentId =" ID); // Filter sub-node collection belonging to the parent node "Node"
Foreach (DataRow Dr In Rows) // Cycling subtitle collection
{
Treenode nd = new treenode ();
nd.navigateURL = DR ["URL"]. TOSTRING (); // Set the browse URL
nd.nodedata = DR ["nodeid"]. TOSTRING (); // Storage node idnd.text = DR ["nodename"]. TOSTRING (); // Setting the node name
THIS.ADDNODES (DT, ND, ND.NODEDATA); // Regeneration, add the child node of this node
IF (node == null || ID == "0")
{
this.treeView1.nodes.add (nd); // Add to root node
}
Else
{
Node.Nodes.Add (ND); // Add sub-node
}
}
2. Read the data of the node when expanding the node
TreeView Control Properties → AutoStBack → True
TreeView Control Properties → Event → Double-click Expand (Expand)
Private Void Page_Load (Object Sender, System.EventArgs E)
{
IF (! ispostback)
{
This.Addsinglenode (NULL, "0"); // to find root node
}
this.treeView1.SelectedNodeIndex = ""; // Do not select any node
}
///
/// When expanding the node, the event triggered
///
/// TreeView control
///
Private void TreeView1_expand (object sender, microsoft.web.ui.webcontrols.treeviewclickeventargs e)
{
Treenode Nd = this.treeView1.GetNodeFromindex (E.NODE); / / Find the node of the trigger event, that is, the node being exposed
IF (nd.nodes [0] .nodedata == "") // The first load, that is, "being loaded ..."
{
This.Addsinglenode (Nd, nd.nodedata); // Add subtosis
}
}
///
// only look for, add child nodes under a single node
///
/// TREENODE you need to add a child node>
/// NodeId of this node
Private Void AddSinglenode (Treenode Node, String ID)
{
IF (node! = null && id! = "0")
{
Node.nodes.clear (); // Empty the node, mainly removing "loading ..."
}
Dbsystem.executesql tmp = new dbsystem.executesql ("t");
DataTable DT = Tmp.GetDataTable ("Select * from treeView where parentid =" id); // grab data from the database
Foreach (DATAROW DR IN DT.ROWS) // Caver all child node {
Treenode nd = new treenode ();
nd.navigateURL = DR ["URL"]. TOSTRING (); // Set the browse URL
nd.nodedata = DR ["NodeID"]. TOSTRING (); // Storage Node ID
nd.text = DR ["nodename"]. TOSTRING (); // Set the node name
Treenode Child = new Treenode (); // This node is only the basis for "ND", and there is no intention
Child.Text = "Loading ...";
nd.nodes.add (child);
IF (node == null || ID == "0")
{
this.treeView1.nodes.add (nd); // Add to root node
}
Else
{
Node.Nodes.Add (ND); // Add sub-node
}
}
}
5. Modify the "TreeView.cs" source, cancel the TreeView default selection node
1, TreeView.cs file
In the article, find "Protected Override Void Onload" event
"Protected Override Void OnPrender (EventArgs E)" event, modify the following code
IF ((SELECTEDNODEX == "|| SELECTEDNODEINDEX == String.empty) && nos.count> 0)
// SELECTEDNODEINDEX = "0"; // before modify
SELECTEDNODEINDEX = ""; // After the modification
2, TreeView.htc file
Find "Function OnDocumentReady () in" c: / inetpub / wwwroot / webctrl_client / 1_0 / treeview.htc "comment out the following code
// Verify SelectedNodeIndex
/ ***************** Change by Jerry on 2005-01-25 ***************** /
/ *
IF (getNodeFromindex) == null) {if (GetNodeFromindex ("0")! = null) SelectedNodeIndex = "0"; else selectedNodeIndex = ""
* /
/ ***************** Change by Jerry on 2005-01-25 ***************** /
Modify the following code in "Function TrytobuildTreeFromROOT ()"
IF (SELECTEDNODEINDEX.LENGTH == 0)
{
// Prop_SelectedNodeIndex = "0"; // before modify
Prop_selectedNodeIndex = ""; //
}
3, use
After modifying "TreeView.cs", recompile once, generate new "Microsoft.Web.ui.WebControls.dll". I only need to set "SELECTEDNodeIndex" "" "," "", "" "," 即 = = ""; // is not selected any node.
6. Create TreeView using XML documentation
1, XML documentation requirements
a) Describe the node name is fixed "
b) Although the XML text file strictly distinguishes on the case of the letter, it is ignored when binding
c) "
d) "
"
The following is an example of a "TreeView" control binding source:
2, binding code
THIS.TREEVIEW1.TREENODESRC = "treexml.xml";
THIS.TREEVIEW1.DATABIND ();
