Is there a way I can keep the text of a Parent node but remove the link? The treeview parent node is used just as a header, no navigation. Any help would be great. Thanks.
private void BindNodes(string PtID)
{
if (PtID != "")
{
int PatientID = Convert.ToInt32(PtID);
DBConnection dbObj = new DBConnection();
if (Session["Activepatient"] != null)
{
string[] SubChild = new string[4];
SubChild[0] = "Demographics";
SubChild[1] = "Medication Reviews";
SubChild[2] = "Drug Testing & Monitoring";
SubChild[3] = "Other Program";
TreeNode oTrParent = new TreeNode();
//trv_patient.ParentNodeStyle = "None";
//oTrParent.SelectAction.Style.Add("display", "none");
TreeNode oTrSubChild1;
TreeNode oTrSubChild;
for (int i = 0; i < 4; i++)
{
oTrSubChild1 = new TreeNode();
oTrSubChild1.Text = SubChild[i];
if (i == 1)
{
PatientInfoCollection patientCollection = new PatientInfoCollection();
patientCollection = dbObj.GetMedicationReviews(PatientID);
foreach (PatientInfo au in patientCollection)
{
oTrSubChild = new TreeNode();
PatientInfo Patient = new PatientInfo();
oTrSubChild.Text = au.DateRcvd.Value.ToString("MM-dd-yyyy")
oTrSubChild.Target = au.ReviewId.ToString();
oTrSubChild1.ChildNodes.Add(oTrSubChild);
}
oTrSubChild = new TreeNode();
oTrSubChild.Text = "Add Medication Review";
oTrSubChild.Target = "New";
oTrSubChild1.ChildNodes.Add(oTrSubChild);
}
trv_patient.Nodes.Add(oTrSubChild1);
}
}
}
}
If temp is such node whose text you want to be plain text and not link then use code below.
TreeNode temp = new TreeNode("text");
temp.SelectAction = TreeNodeSelectAction.None;
treeView1.Nodes.Add(temp);
This is what your looking for. You have to set the SelectAction of the parent node TreeNode to TreeNodeSelectAction.None. I even show how to do it with the child too.
ASP.NET
<asp:TreeView
ID="MyTreeView"
ShowCheckBoxes="Parent,Leaf,All"
runat="server"
ShowLines="true"
ShowExpandCollapse="true">
</asp:TreeView>
C#
//Make A Parent Node
var Parent = new TreeNode();
Parent.Text = "Parent 1";
// Make the parent nodes not be hyperlinks but plain text
Parent.SelectAction = TreeNodeSelectAction.None;
//You can do the same with a child node like so
var Child = new TreeNode();
Child.Text = "Child 1";
// Make the child nodes not be hyperlinks but plain text
Child.SelectAction = TreeNodeSelectAction.None;
//Add the child node to the parent node
Parent.ChildNodes.Add(Child);
//Finally add the parent node with children to the treeview
MyTreeView.Nodes.Add(Parent);
I'm not sure if I understand what you want. Assuming that it's WinForms and that you just want to disable the ability to select the root node in a TreeView you could just handle the BeforeSelect event of the TreeView and then have the following code:
if (e.Node.Parent == null)
e.Cancel = true;
TreeNode root = new TreeNode("Root");
root.SelectAction = TreeNodeSelectAction.None;
Related
How to make parent node can not selected in treeview ?
If the node is "Parent" , it can not support select,
so I add code
if (drv["isParent"].ToBool())
{
node.Selected = false;
}
But not work? how to fix ?
TreeNode node;
var rows = dv.AsEnumerable().Where(r => r["ParentID"].ToString() == parentid);
foreach (DataRow drv in rows.AsEnumerable())
{
// DataRowView一行
node = new TreeNode();
node.Value = drv["NodeID"].ToString();
node.Text = drv["Name"].ToString();
if (drv["isParent"].ToBool())
{
node.Selected = false;
}
tnc.Add(node);
if (drv["ObjectCode"].ToString() != "0")
{
InitTree(node.ChildNodes, node.Value);
}
}
if (drv["isParent"].ToBool())
{
node.SelectAction = TreeNodeSelectAction.None;
}
I want to add to my treeview some nodes with childs, but have a problem how to add nodes with for example ToolTipText. I want do it with TreeNodeCollection.
It is possible or how could I change my code?
Here is my code where all nodes are root nodes.
protected void CreateTreeView(TreeNodeCollection parentNode, int parentID, DataTable mytab)
{
foreach (DataRow dta in mytab.Rows)
{
if (Convert.ToInt32(dta["parent_id"]) == parentID)
{
String key = dta["id"].ToString();
String text = dta["host_ip"].ToString();
TreeNode tn = new TreeNode();
tn.Name = dta["id"].ToString();
tn.Text = dta["host_ip"].ToString();
tn.ToolTipText = dta["description"].ToString();
parentNode.Add(tn);
TreeNodeCollection newParentNode = parentNode;
CreateTreeView(newParentNode, Convert.ToInt32(dta["id"]), mytab);
}
}
}
Calling code:
CreateTreeView(treeView1.Nodes, 0, dt);
If someone had with this problem here is an example:
void add_tooltiptext(DataTable mytab)
{
try
{
foreach (DataRow nodes in mytab.Rows)
{
TreeNode[] found = treeView1.Nodes.Find(nodes["id"].ToString(), true);
for (int i = 0; i < found.Length; i++)
{
treeView1.SelectedNode = found[i];
treeView1.SelectedNode.ToolTipText = nodes["description"].ToString();
}
}
}
catch
{ }
}
I have a treeview and i want no postback on click any childnodes.And i will get selected childnode value.
I found a solution , when i set "node_.SelectAction = TreeNodeSelectAction.None;" i cant select any childnodes and no highlight on it.
Waiting your helps.Sorry about my en.
Aspx:
<asp:TreeView ID="TreeView1" runat="server"></asp:TreeView>
Cs:
TreeView1.Nodes.Clear();
TreeView1.TreeNodeExpanded += new TreeNodeEventHandler(TreeView1_TreeNodeExpanded);
DataTable dt = ImzaDll.Imza.KategorileriGetir(true);
foreach (DataRow row in dt.Rows)
{
TreeNode node_ = new TreeNode();
node_.Text = row["ACIKLAMA"].ToString();
node_.Value = row["KATEGORI"].ToString();
TreeView1.Nodes.Add(node_);
}
void TreeView1_TreeNodeExpanded(object sender, TreeNodeEventArgs e)
{
addChildNodes(e.Node);
}
private void addChildNodes(TreeNode node)
{
DataTable dt = ImzaDll.Imza.KutuphaneBasliklariGetir(true, node.Value.ToString());
foreach (DataRow row in dt.Rows)
{
TreeNode childNode = new TreeNode();
childNode.Text = row["BASLIK"].ToString();
childNode.Value = row["KUTUPHANE_ID"].ToString();
childNode.ToolTip = row["BASLIK"].ToString() + " kütüphanesini ekle";
childNode.Target = "_new";
node.ChildNodes.Add(childNode);
}
}
You can set CSSClass of treeview child nodes
like
<asp:TreeView LeafNodeStyle-CssClass="childnode" runat="server">....</asp:TreeView>
then using jquery you get get class and set return false like follow.
$(".childnode").click(function(){
return false;
})
...same way you can set RootNodeStyle-CssClass, ParentNodeStyle-CssClass class and use jquery to set them...
TreeNode tn = new TreeNode();
tn.SelectAction = TreeNodeSelectAction.None; OR tn.SelectAction = TreeNodeSelectAction.Expand;
Both of these will not cause postback.
you could remove the href of link('a') tag attribute to stop post back
$('#ctl00_ContentPlaceHolder1_tvHierarchyView table tr td>a').click(function () {
var treeViewData = window["<%=tvHierarchyView.ClientID%>" + "_Data"];
if (treeViewData.selectedNodeID.value != "") {
var selectedNode=document.getElementById(treeViewData.selectedNodeID.value);
var value = selectedNode.href.substring(selectedNode.href.indexOf(",") + 3, selectedNode.href.length - 2);
var text = selectedNode.innerHTML;
alert("Text: " + text + "\r\n" + "Value: " + value);
} else {
alert("No node selected.")
}
$(this).removeAttr("href");
/// ...................... rest of your code
}); /// End of click function
}); /// End of document ready function
Here steps explanation:
Get the dev id which contains the tree table by Using inspect element:
Get details from the selected child node.
After taken the details of child node , remove the attribute "href" to avoid post back.
Do whatever functionality you what do with selected node details (eg pass selected value using ajax)
If the logic within this method is run from an event handler such as Button_Click it works perfectly, but, when running this from a method such as below I get the error:
hostView.SelectedNode.Nodes.Add(newNode);
Object reference not set to an instance of an object.
Here is my code:
private void SetupHostTree()
{
// Set internal host names
using (var reader = File.OpenText("Configuration.ini"))
{
List<string> hostnames = ParseInternalHosts(reader).ToList();
foreach (string s in hostnames)
{
TreeNode newNode = new TreeNode(s);
hostView.SelectedNode.Nodes.Add(newNode);
string title = s;
TabPage myTabPage = new TabPage(title);
myTabPage.Name = s;
tabControl1.TabPages.Add(myTabPage);
}
}
}
Maybe there are no Selected Nodes :)
Probably because no node is currently selected in the hostView TreeView.
The documentation says that the TreeView.SelectedNode property will return null when no node is currently selected. And since you've combined it into an expression, the entire expression is failing because there is no Nodes collection on a null object!
Try this code:
private void SetupHostTree()
{
// Set internal host names
using (var reader = File.OpenText("Configuration.ini"))
{
List<string> hostnames = ParseInternalHosts(reader).ToList();
foreach (string s in hostnames)
{
// Ensure that a node is currently selected
TreeNode selectedNode = hostView.SelectedNode;
if (selectedNode != null)
{
TreeNode newNode = new TreeNode(s);
selectedNode.Nodes.Add(newNode);
}
else
{
// maybe do nothing, or maybe add the new node to the root
}
string title = s;
TabPage myTabPage = new TabPage(title);
myTabPage.Name = s;
tabControl1.TabPages.Add(myTabPage);
}
}
}
I have this treeview control where I want to put uploaded files on the server.
I want to be able to create the nodes and the child nodes dynamically from the database.
I am using this query for getting the data from DB:
SELECT c.Category, d.DocumentName FROM Categories c
INNER JOIN DocumentUserFile d
ON c.ID = d.CategoryId
WHERE d.UserId = '9rge333a-91b5-4521-b3e6-dfb49b45237c'
The result from that query is this one:
Agendas
transactions.pdf
Minutes
accounts.pdf
I want to have the treeview sorted that way too.
I am trying with this piece of code:
TreeNode tn = new TreeNode();
TreeNode tnSub = new TreeNode();
foreach (DataRow dt in tblTreeView.Rows)
{
tn.Text = dt[0].ToString();
tn.Value = dt[0].ToString();
tnSub.Text = dt[1].ToString();
tnSub.NavigateUrl = "../downloading.aspx?file=" + dt[1].ToString() +"&user=" + userID;
tn.ChildNodes.Add(tnSub);
tvDocuments.Nodes.Add(tn);
}
I am getting the treeview populated nicely for the 1st category and the document under that category, but I can't get it to work when I want to show more documents under that category, or even more complicate to show new category beneath the 1st one with documents from that category.
How can I solve this?
I appreciate the answers a lot.
Thanks, Laziale
You should create new nodes for each item:
// TreeNode tn = new TreeNode();
// TreeNode tnSub = new TreeNode();
foreach (DataRow dt in tblTreeView.Rows)
{
TreeNode tn = new TreeNode(); // *
tn.Text = dt[0].ToString();
tn.Value = dt[0].ToString();
TreeNode tnSub = new TreeNode(); // *
tnSub.Text = dt[1].ToString();
tnSub.NavigateUrl = "../downloading.aspx?file=" + dt[1].ToString() +"&user=" + userID;
tn.ChildNodes.Add(tnSub);
tvDocuments.Nodes.Add(tn);
}