I am having an issue with TreeList not returning any results whenever I use a string DataKeyNames value. For type int it works as expected.
For the sake of this example, I used an int key but simply added a facade string GET on top of it to verify that once string data type is used it fails.
Am I doing something incorrectly?
Complete ASPX:
COMPLETE ASPX.CS
For the sake of this example, I used an int key but simply added a facade string GET on top of it to verify that once string data type is used it fails.
Am I doing something incorrectly?
Complete ASPX:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="TreeListStringKey.aspx.cs" Inherits="LiveExamples_Services_Audit_TreeListStringKey" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <rei:REIRadScriptManager ID="REIRadScriptManager1" runat="server" ScriptMode="Release" LoadScriptsBeforeUI="true"> <Scripts> <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" /> </Scripts> </rei:REIRadScriptManager> <div> <telerik:RadTreeList ID="tree" runat="server" OnNeedDataSource="Tree_NeedDataSource" ParentDataKeyNames="RealParentId" DataKeyNames="RealId" AllowPaging="true" PageSize="1000" AutoGenerateColumns="false" AllowSorting="true" EnableEmbeddedSkins="false" Skin="EHB"> <Columns> <telerik:TreeListBoundColumn UniqueName="SectionName" DataField="SectionName" HeaderText="Section" /> <telerik:TreeListBoundColumn UniqueName="ActionTaken" DataField="ActionTaken" HeaderText="Action" /> <telerik:TreeListTemplateColumn UniqueName="ModifiedDate" HeaderText="Modified Date"> <ItemTemplate> <%# (DateTime)Eval("ModifiedDate") == DateTime.MinValue ? "" : Eval("ModifiedDate") %> </ItemTemplate> </telerik:TreeListTemplateColumn> <telerik:TreeListBoundColumn UniqueName="ModifiedBy" DataField="ModifiedBy" HeaderText="Modified By" /> <telerik:TreeListBoundColumn UniqueName="Value" DataField="Value" HeaderText="Value" HeaderStyle-Width="45%" /> </Columns> </telerik:RadTreeList> </div> </form></body></html>COMPLETE ASPX.CS
using System;using System.Collections.Generic;using System.Globalization;using Telerik.Web.UI;public partial class LiveExamples_Services_Audit_TreeListStringKey : System.Web.UI.Page{ public class FlatRevision { public int Id { get; set; } public int ParentId { get; set; } public string RealId { get { return Id.ToString(CultureInfo.InvariantCulture); } } public string RealParentId { get { return ParentId.ToString(CultureInfo.InvariantCulture); } } //public double RealId { get { return (double)Id; } } //public double RealParentId { get { return (double)ParentId; } } public string SectionName { get; set; } public DateTime ModifiedDate { get; set; } public string ModifiedBy { get; set; } public string Value { get; set; } public string ActionTaken { get; set; } public RevType Type { get; set; } } public enum RevType { Section = 1, Revision = 2 } protected void Tree_NeedDataSource(object sender, TreeListNeedDataSourceEventArgs e) { tree.DataSource = new List<FlatRevision> { //sv report new FlatRevision { Id = 1, ParentId = 0, SectionName = "Site Visit Report", Type = RevType.Section }, new FlatRevision { Id = 2, ParentId = 1, SectionName = "Key Findings", Type = RevType.Section }, //kf r1 //new FlatRevision { Id = 3, ParentId = 2, SectionName = "Revision", Type = RevType.Section, ModifiedBy = "Willis", ModifiedDate = DateTime.Now.AddDays(-2) }, //removing "revision" rows per Venkat new FlatRevision { Id = 4, ParentId = 2, SectionName = "Key Finding - ADAP", Type = RevType.Section, Value="Type: ADAP", ActionTaken = "Updated"}, new FlatRevision { Id = 5, ParentId = 2, SectionName = "Key Finding - Financial Assessment", Type = RevType.Section, Value="Type: Financial Assessment", ActionTaken = "Updated" }, //kf r2 //new FlatRevision { Id = 6, ParentId = 2, SectionName = "Revision", Type = RevType.Section, ModifiedBy = "Jimmy", ModifiedDate = DateTime.Now.AddDays(-1)},//removing "revision" rows per Venkat new FlatRevision { Id = 7, ParentId = 2, SectionName = "Key Finding - Financial Review", Type = RevType.Section, Value="Type: Financial Review", ActionTaken = "Added" }, //sv questionnaire new FlatRevision { Id = 8, ParentId = 0, SectionName = "Post Site Visit Questionnaire", Type = RevType.Section }, new FlatRevision { Id = 9, ParentId = 8, SectionName = "1. Were there any updates made to the site visit agenda at the entrance conference with the organization? ", Type = RevType.Section }, //simple checklist revision //new FlatRevision { Id = 10, ParentId = 9, SectionName = "Revision", Type = RevType.Section, ModifiedBy = "Jasper", ModifiedDate = DateTime.Now.AddDays(-4).AddMinutes(-29) }, //removing "revision" rows per Venkat //new FlatRevision { Id = 11, ParentId = 10, SectionName = "Checklist Question", Type = RevType.Section }, new FlatRevision { Id = 12, ParentId = 9, SectionName = "Answer", Type = RevType.Section, Value = "Yes", ActionTaken = "Updated"}, new FlatRevision { Id = 13, ParentId = 9, SectionName = "Comment", Type = RevType.Section, Value = "pajama pajama pajama pajama pajama pajama pajama pajama pajama pajama", ActionTaken = "Updated"}, new FlatRevision { Id = 14, ParentId = 9, SectionName = "Agenda Documents", Type = RevType.Section}, new FlatRevision { Id = 15, ParentId = 14, SectionName = "Document - 'Bananas.txt'", Type = RevType.Section, ActionTaken = "Added"}, new FlatRevision { Id = 16, ParentId = 15, SectionName = "Document Name", Type = RevType.Section, Value="Bananas.txt"}, new FlatRevision { Id = 17, ParentId = 15, SectionName = "Document Size", Type = RevType.Section, Value="5kb"}, new FlatRevision { Id = 18, ParentId = 15, SectionName = "Document Description", Type = RevType.Section, Value="This is the file that contains useful information about bananas."}, new FlatRevision { Id = 19, ParentId = 14, SectionName = "Document - 'Fish.txt'", Type = RevType.Section, ActionTaken = "Updated"}, new FlatRevision { Id = 20, ParentId = 19, SectionName = "Document Name", Type = RevType.Section, Value="Fish.txt"}, new FlatRevision { Id = 21, ParentId = 19, SectionName = "Document Size", Type = RevType.Section, Value="332kb"}, new FlatRevision { Id = 22, ParentId = 19, SectionName = "Document Description", Type = RevType.Section, Value="All about fish."}, }; }}1 Answer, 1 is accepted
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Justin
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answered on 16 Dec 2013, 10:44 PM
Stumbled onto the answer myself. The documentation explains it: TreeList Structure
I overlooked a rather important detail:
Once I modified my code to use default(T) wherever root elements have a parent, things began working.
I overlooked a rather important detail:
-
If the key fields are of value type or string, the root items are either:
- items with ParentKeyValue set to the default value of the type
- items for which the parent key value is equal to the key value
- If the key fields are complex objects, a recursive check on their properties is performed until the above rule is met.
Once I modified my code to use default(T) wherever root elements have a parent, things began working.