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Web Forms :: Populating Treeview Control Dynamically?


I want to populate my treeview with the values from database. How can i do it.


View 2 Replies (Posted: Oct 21, 2010 09:10 AM)

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Related Forum Messages For ASP.NET category:
Web Forms :: Populating A Dynamically Generated Checklist Control In Code-behind Not Working?
(The following is a complete re-edit of the original post which was rambling, confusing etc...)

I have a form with a dynamically generated checklist:

<asp:CheckBoxList ID="cblGames" runat="server" DataSourceID="sqlGames"DataTextField="Game" DataValueField="Id"</asp:CheckBoxList>
<asp:SqlDataSource ID="sqlGames" runat="server"ConnectionString="<%$ ConnectionStrings:Games %>"
SelectCommand="SELECT [Id], [Game], [ShowWaitingList] FROM [Aanbod] WHERE ([ShowWaitingList] = @ShowWaitingList)">
<SelectParameters><asp:Parameter DefaultValue="true" Name="ShowWaitingList" Type="Boolean" /></SelectParameters>
</asp:SqlDataSource>

The following code-behind is supposed to check those boxes that correspond to values stored in a database. It fails and I don't know why.

[Code]....

Posted: Feb 05, 2011 03:24 PM

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This is my Aspx code which shows only InsertItemTemplate and EditItemTemplate.

[Code]....

Posted: Mar 05, 2010 01:24 PM

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am using asp .net 3.5 web forms with VB.I have a masterpage that is populating a treeview from a sql db. When a user clicks on the name in the tree it passes the employee identifier (employee number) to a label on the master page i have hidden. FROM the CONTENT page i am reading the label on the master page and updating the label on the content page to match the label on the master page so i can use the emp number to display info.At least that what i want. However, the content page is not posting back when the label updates of course and its one clikc behind becuase there is no post back. Is there a way to make the page postback when a label changes or a textbox for that matter.Here is how i am updating the label control On the mastepage :

Public Property EmpCode() As [String]
Get
Return Label360.Text

[code]...

Posted: May 06, 2010 10:48 AM

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I have a class as follows:

public enum
state { FR, STR, SR, IR, PR }
public class
Node {
protected
string NodeName;
protected
string NodeValue;
protected
string NodeTip;
protected
state NodeState;
protected
Node NodeParent;
protected
List<Node> NodeChildren;
public Node(string Name,string
Value,string Tip,state State){
this.NodeName =
"DataSelection:DS1";
this.NodeState =
state.FR;this.NodeParent =
null;
this.NodeChildren=new
List<Node>();}
public
void AddChildren(Node nChildren){
nChildren.NodeParent = this;
this.NodeChildren.Add(nChildren);}

Now i want to display this class objects in a Treeview.

Posted: Nov 05, 2009 10:42 AM

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Posted: Mar 29 at 14:26

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I am populating a data bound control DropDownList with file names from a local folder that resides within a ListView control.

I am able to populate as expected, in testing list is generated - all good in that regard.

However once I set to databind by adding SelectedValue='<%# Bind("ImageFile") %>'the following error occurs

ERROR:Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.

This is the aspx file .. no codebehind:

#CODE SNIP #

[Code]....

Posted: Jan 21, 2010 08:14 PM

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I'm currently building my website and have hit a brick wall. I've not begun coding anything fro this yet as I am unable to get my head around it and not sure where to start.

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Posted: Feb 27, 2011 06:21 PM

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I have a writing a web page that will use several different types of control. The control types will depend on the data being read from a SQL database. The following is my code that decides what control to add to the page:

Select myReader.GetString(1)
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Dim bdpAnswer As BasicFrame.WebControls.BasicDatePicker = New BasicFrame.WebControls.BasicDatePicker()
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divAnswerContainer.Controls.Add(bdpAnswer)
Answers.Controls.Add(divAnswerContainer)
Case "DropDownList"
Dim ddlAnswer As DropDownList = New DropDownList()
divAnswerContainer.Controls.Add(ddlAnswer)
Answers.Controls.Add(divAnswerContainer)
Case "RadioButton"
Dim rbAnswer As RadioButton = New RadioButton()
divAnswerContainer.Controls.Add(rbAnswer)
Answers.Controls.Add(divAnswerContainer)
Case "TextBox"
Dim tbAnswer As TextBox = New TextBox()
divAnswerContainer.Controls.Add(tbAnswer)
Answers.Controls.Add(divAnswerContainer)
End Select

Posted: May 10, 2010 09:36 PM

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Posted: Jul 14, 2010 08:54 AM

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i have 2 tables Desgn & EmpForm

Desgn table is lik this

CREATE TABLE [dbo].[Desgn](
[DesignationCode] [int] IDENTITY(1,1) NOT NULL,
[DesignationName] [varchar](50) NOT NULL,
CONSTRAINT [PK_Desgn] PRIMARY KEY CLUSTERED

[Code]....

and i have called the Populate1() method in the page load event., but i m not getting the dropDown populated why ?

Posted: Sep 24, 2010 05:38 PM

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I need to create a TemplateField column dynamically , which will contain dropdowlist controls. I've been using this
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[Code]....

But what I don't know is, where should I populate the dropdownlist control?

Posted: Sep 06, 2010 11:37 PM

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Populating A Table Dynamically?
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Posted: Jan 08, 2009 06:34 PM

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<tr>
<td><asp:LinkButton ID="pagerPrevious" runat="server" PostBackUrl='<%# getUrl("Previous") %>'>Previous</asp:LinkButton>
/td>
</tr
[code]...

Posted: Mar 17, 2009 01:02 PM

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Posted: Nov 23, 2010 08:56 AM

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is there any way to do it? on page load?

Posted: Nov 24, 2009 04:16 AM

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For example, most ListBoxes will be populated and bound with a value of 0 to 100 in increments of 5 (0, 5, 10, 15, etc) but SOME will occasionally need to populate and bind with an additional integer of, say, 3. I have tried to populate the ListBox with non-data-bound items and then do the binding later but I am having difficulties with that. To insert the non-divisible by 5 value, I would need to know which repeater item contains the corresponding drop-down list.I can try to query the for for the ContentPlaceHolder AND the Repeater AND the ListBox but they are all dynamically created so locating the control is difficult. This will probably be one of those posts that do not get answered. The .aspx code is:

<asp:ListBox ID="lbCodeWeight" runat="server"
SelectionMode="Single" DataTextField="CodeWeight" DataValueField="PerfGrp" Rows="1"
onchange="javascript:updateTotal()" Font-Overline="False">
</asp:ListBox>
Here is some c# code that I have thus far with "appraisal" being the name of the Repeater:
private void PopulateAppraisals()
{
if (Cache["dt1"] != null && dt1 == null)
{
dt1 = (DataTable)Cache["dt1"];
}
appraisal.DataSource = dt1;
appraisal.DataBind();
foreach (RepeaterItem item in Appraisal.Items)
{
ListBox lb = (ListBox)item.FindControl("lbCodeWeight");
if (lb != null)
{
int i = 0;
while (i <= 100)
{
ListItem li = new ListItem();
li.Text = i.ToString();
lb.Items.Add(li);
i = i + 5;
}
}
}
foreach (DataRow row in dt1.Rows)
{
int i = Convert.ToInt32(row["CodeWeight"]);
if (i % 5 != 0)
{
foreach (RepeaterItem item in Appraisal.Items)
{
ListBox lb = (ListBox)item.FindControl("lbCodeWeight");
if (lb != null)
{
//find the listbox control that will need this listitem added
//then bind
//then set as selectedvalue
}
}
}
}
}

Posted: Oct 02, 2009 09:51 PM

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[Code]....

Problem is that upon clicking on the gridview select button, I manage to add a new tab, but after this, the gridview control gets locked up and stops working (stops from selecting any other rows).

In the code above, I'm rebuilding all the tabs (including the one containing the gridview), after going through forums articles. However, I've also tried doing it the simple way but it didn't work:

[Code]....

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[Code]....

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Posted: Jul 23, 2010 11:47 AM

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<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="OrderEntry.aspx.cs" Inherits="WebApplication3.WebForm7" %>
.......

[code]...

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<ol id="olUploadedFiles" style="list-style-type: decimal; padding-left: 30px;">
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the btnAttachQuote is defined as

protected global::System.Web.UI.WebControls.Button btnAttachQuote;

can i do something simular to olUploadedFiles? there are alot of list options in webcontrols and i'm unsure how to use them. I would like to use a for loop to populate olUploadedFiles from a string array in my .cs. something like ...

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[code]....

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