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How to access control inside parent control? (asp.net c#)

I have page with listview in it. There is label and dropdownlist in listview. I would like to access the text of label from ddlTags_Init() method.
Code:
<asp:ListView ID="ListView1" runat="server" DataSourceID="SqlDataSource1"
DataKeyNames="id_Image" onitemdatabound="ListView1_ItemDataBound">
<ItemTemplate>
<asp:Label ID="TagsLabel" runat="server" Text='<%# Eval("Tags") %>' />
<asp:DropDownList ID="ddlTags" runat="server" OnInit="ddlTags_Init" >
</asp:DropDownList>
</ItemTemplate>
</asp:ListView>
Code behind:
protected void ddlTags_Init(object sender, EventArgs e)
{
DropDownList ddlTags = (DropDownList)sender;
Label lblTag = (Label)ddlTags.Parent.FindControl("TagsLabel");
string text=lblTag.Text;
}
At the moment i am stuck with
Label lblTag = (Label)ddlTags.Parent.FindControl("TagsLabel");
Anyone knows what am i missing?
Thanks, Jim

Assuming that there are more than 1 elements in the listview datasource, why don't you put your code in the ItemDataBound handler? I think that it should work.

Init is too early to get the bind value of Label. In other words, label value hasn't been bind yet.
Instead you might want to consider using ItemDataBound method.
<asp:ListView ID="ListView1" runat="server"
OnItemDataBound="ListView1_ItemDataBound" ...>
....
</asp:ListView>
protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
var ddlTags = e.Item.FindControl("ddlTags") as DropDownList;
var tagsLabel = e.Item.FindControl("TagsLabel") as Label;
}
}

Trying to access the label in ListView

I have a ListView control with DataPager, i am trying to show results from database into ListView the database have field in which i have store content from ajaxhtmlextender i have bind ListView with database like this
protected void ListEvents()
{
conn = new SqlConnection(connSting);
cmdListEvent = new SqlCommand("SELECT * FROM LatestEvents",conn);
table = new DataTable();
conn.Open();
adpter = new SqlDataAdapter(cmdListEvent);
adpter.Fill(table);
ListEvent.DataSource = table;
ListEvent.DataBind();
conn.Close();
}
and the .aspx file
<asp:ListView ID="ListEvent" runat="server"
OnItemDataBound="ListEvent_ItemDataBound" >
<LayoutTemplate>
<asp:PlaceHolder runat="server" ID="itemPlaceholder"></asp:PlaceHolder>
</LayoutTemplate>
<ItemTemplate>
<div class="contmainhead">
<h1 id="evhead"><asp:Label ID="LabelTittle" runat="server"><%#Eval("Tittle") %></asp:Label></h1>
</div>
<div class="contmain">
<asp:Label ID="LabelBody" runat="server"> <%#Eval("Body") %></asp:Label>
</div>
</ItemTemplate>
</asp:ListView>
It is giving the intended results but the problem is the label
<asp:Label ID="LabelBody" runat="server"> <%#Eval("Body") %></asp:Label>
showing all the formatted text and images as html markup, i know to work the label perfectly i have to use this function
Server.HtmlDecode();
i tried it like this
protected void ListEvent_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
Label LabelBody = (Label)e.Item.FindControl("LabelBody");
LabelBody.Text = Server.HtmlDecode(LabelBody.Text);
}
}
But the label shows nothing. . so how can i make the label show the content correctly?
Your help will be greatly appreciated . .Thanx

protected void ListEvent_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
ListViewDataItem dataItem = (ListViewDataItem) e.Item;
Label LabelBody = (Label)e.Item.FindControl("LabelBody");
LabelBody.Text = (string) DataBinder.Eval(dataItem.DataItem, "Body");
}
}
Please make sure there is a column named in your returned datatable
and also remove the <%# EVAL %> tag from the text attribute of your label, leave it empty or do not specify the attribute in your aspx

try
<asp:Label ID="LabelBody" runat="server" text='<%#Eval("Body") %>' />
EDIT :
if the above didn't work try :
<asp:Label ID="LabelBody" runat="server" text="<% #Eval("Body").ToString() %>" />

FindControl on control in invisible Panel generates Null reference error

The following code produces a null reference error on this line href.NavigateUrl = "foo.aspx?id=" + id; when I change the DropDownList selection, but not when I enter the id as a QueryString parameter. It seems like it has something to do with the order of events, but I'm not sure what, or how to fix it.
.aspx
<asp:Panel ID="Panel1" runat="server">
<asp:DropDownList ID="DropDownList1" runat="server"
OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack="True">
<asp:ListItem Text="1" Value="1"></asp:ListItem>
<asp:ListItem Text="2" Value="2"></asp:ListItem>
</asp:DropDownList>
</asp:Panel>
<br />
<asp:Panel ID="Panel2" runat="server" Visible="false">
<asp:LoginView ID="LoginView1" runat="server">
<RoleGroups>
<asp:RoleGroup Roles="superadmin">
<ContentTemplate>
<asp:HyperLink runat="server" ID="HyperLink1">HyperLink</asp:HyperLink>
</ContentTemplate>
</asp:RoleGroup>
</RoleGroups>
</asp:LoginView>
</asp:Panel>
.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["id"] != null)
{
if (!String.IsNullOrEmpty(Request.QueryString["id"]))
{
Panel1.Visible = false;
SetHref(Request.QueryString["id"]);
}
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SetHref(DropDownList1.SelectedValue);
}
protected void SetHref(string id)
{
Panel2.Visible = true;
HyperLink href = (HyperLink)LoginView1.FindControl("HyperLink1");
href.NavigateUrl = "foo.aspx?id=" + id;
href.Text = href.NavigateUrl;
}
I've found a couple of work-arounds: setting the default visbility of Panel2 to true is one, and moving the HyperLink outside of Panel2 and changing its visibility directly is the other, but neither of those do exactly what I want because there are other controls that I am trying make visible/invisible along with the HyperLink.
Any thoughts?

Instead of using the following line:
Panel2.Visible = true;
Try using:
Panel2.Attributes["style"] = "display:none";
I think the contents of your panel might not be rendering when you set Visible to false.

Gridview click on row enable controls

I have a gridview. The gridview has a textbox multiline that keeps an text. After that I have a column with imagebutton named approved, and one named not approved. I want to force the user before click approved or not approved to read the text inside the multiline box. How can I achieve this programmatically? I know I should create a Rowdatabound Event, but what I should do with the code? I am using c# ASP.NET web application.

I know you can track the scroll bar of the browser using javascript but I've personally never come across similar functionality for a text box. I would suggest trying a slightly different approach, why don't you add an extra column to you grid view which has a check box control for - I've read and accepted the agreement. And the Approve button will only be enabledd when the checkbox is checked, here's an example:
ASPX:
<div>
<asp:ScriptManager ID="sm" runat="server" />
<asp:UpdatePanel ID="updatePanel" runat="server">
<ContentTemplate>
<asp:GridView ID="grid" runat="server" AutoGenerateColumns="false" OnRowDataBound="grid_RowDataBound">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox TextMode="MultiLine" runat="server" ID="txtAgreement" Text='<%# Eval("Agreement") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
I have read and accepted the agreement
<asp:CheckBox ID="chkAgreement" AutoPostBack="true" runat="server" OnCheckedChanged="CheckedChanged" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="btnAccept" runat="server" Text="Accept" OnClick="Accept" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
</div>
Code behind:
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
var items = new List<License> { new License { Agreement = "Agreement 1" }, new License { Agreement = "Agreement 2" } };
grid.DataSource = items;
grid.DataBind();
}
}
protected void Accept(object sender, EventArgs e)
{
}
protected void grid_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
(e.Row.FindControl("btnAccept") as Button).Enabled = false;
}
protected void CheckedChanged(object sender, EventArgs e)
{
var chkAgreement = sender as CheckBox;
Button btnAccept = null;
if (chkAgreement != null)
{
var row = chkAgreement.Parent.Parent as GridViewRow;
btnAccept = row.FindControl("btnAccept") as Button;
if (btnAccept != null)
if (chkAgreement.Checked)
btnAccept.Enabled = true;
else
btnAccept.Enabled = false;
}
}
}
public class License
{
public string Agreement { get; set; }
}

How to add web user controls to repeater

Scenario:
UsrControl: custom user control, which contains a textbox and a button, rederend horizontally (in one line).
UsrControlContainer: custom user control, which should be able to display multiple UsrControl objects (each object in seperate line, so the Seperator template will probably be <br />. This control also contains a button, which adds new UsrControl to the collection.
My code:
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click"/>
<asp:Repeater ID="rptExample" runat="server">
<ItemTemplate>
</ItemTemplate>
<SeparatorTemplate><br /></SeparatorTemplate>
</asp:Repeater>
And:
protected void Button1_Click(object sender, EventArgs e)
{
rptExample.DataSource = new List<UsrControl> {new UsrControl(), new UsrControl()};
rptExample.DataBind();
}
Simple question - what should I put in ItemTemplate to make this work?
Edit - I also want to pass some parameters to UsrControl before rendering it.

<asp:Repeater ID="rptExample" runat="server">
<ItemTemplate>
<uc:UsrControl runat="server" />
</ItemTemplate>
<SeparatorTemplate><br /></SeparatorTemplate>
</asp:Repeater>
protected void Button1_Click(object sender, EventArgs e)
{
rptExample.DataSource = Enumerable.Range(0, 2);
rptExample.DataBind();
}

Following your question in answer. You can catch every binding object in ItemDataBound event. So for example, as i used, set whole object as user control property.
protected void PersonesRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
PersonLine line = (PersonLine)e.Item.FindControl("Person1");
line.Person = e.Item.DataItem as Osoba;
}
}
Ofcourse, you have to add the event handler to your repeater:
<asp:Repeater runat="server" ID="PersonesRepeater" OnItemDataBound="PersonesRepeater_ItemDataBound"><ItemTemplate>
<my:Person ID="Person1" runat="server" />
</ItemTemplate>
</asp:Repeater>