c# - Binding a tree view structure , in asp .net? -

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i have tried create asp,net treeview structure using below

 <!doctype html>     <html xmlns="http://www.w3.org/1999/xhtml">      <head runat="server">      <title>untitled page</title>     </head> <body> <form id="form1" runat="server">     <div>          <asp:treeview             id="treeview1"             runat="server" />         </div> </form>

and in code behind

  protected void page_load(object sender, eventargs e)     {         if (!page.ispostback)             populatetreeview();     }     private void populatetreeview()     {         datatable treeviewdata = gettreeviewdata();         addtoptreeviewnodes(treeviewdata);      }     private datatable gettreeviewdata()     {         string selectcommand = "select top 10 idx_client,idx_branch,client_name tbl_client";         string constring =system.configuration.configurationmanager.appsettings["connectionstring"].tostring();         sqldataadapter dad = new sqldataadapter(selectcommand, constring);         datatable dtbldiscuss = new datatable();         dad.fill(dtbldiscuss);         return dtbldiscuss;     }      private void addtoptreeviewnodes(datatable treeviewdata)     {         dataview view = new dataview(treeviewdata);         foreach (datarowview row in view)         {             treenode newnode = new treenode(row["client_name"].tostring(), row["idx_client"].tostring());             treeview1.nodes.add(newnode);             newnode.populateondemand = true;             addchildtreeviewnodes(treeviewdata, newnode);         }      }      private void addchildtreeviewnodes(datatable treeviewdata, treenode parenttreeviewnode)     {         dataview view = new dataview(treeviewdata);         foreach (datarowview row in view)         {             treenode newnode = new treenode(row["client_name"].tostring(), row["idx_client"].tostring());             parenttreeviewnode.childnodes.add(newnode);             newnode.populateondemand = true;             addchildtreeviewnodes(treeviewdata, newnode);         }     }

but gives exception

cannot evaluate expression because current thread in stack overflow state

please point out changes needed, because using treeview first time how solve exception. 1 me.

the problem lies in recursive call in addchildtreeviewnodes:

private void addchildtreeviewnodes(datatable treeviewdata, treenode parenttreeviewnode) {     dataview view = new dataview(treeviewdata);     foreach (datarowview row in view)     {         treenode newnode = new treenode(row["client_name"].tostring(), row["idx_client"].tostring());         parenttreeviewnode.childnodes.add(newnode);         newnode.populateondemand = true;         // error caused recursion below         addchildtreeviewnodes(treeviewdata, newnode); // calls again remove     } }

what happening here inserting child node of view , try insert child node within (which in turn same thing). keep on happening until stack blown.

i suspect don't need line have marked remove this


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