Asp controls Id generation inside repeater
- by toraan
I define some controls inside repeater itemtemplate, the problem is with the Id that are generated automatically.
This is my page:
<asp:Repeater ID="rptThreads" runat="server"
onitemcreated="rptThreads_ItemCreated">
<HeaderTemplate>
<table cellpadding="0px" cellspacing="0">
</HeaderTemplate>
<ItemTemplate>
<tr style="height:50px">
<td>
<asp:PlaceHolder ID="plcItemTitle" runat="server">
<asp:Panel id="titleContainer" runat="server" style="position:absolute;">
<asp:HyperLink ID="lnkTitle" runat="server" style="float:left;padding-right:10px;" Text='<%# Container.DataItem%>'/>
<asp:Panel id="pnlEditButtons" runat="server" Visible="false" style="vertical-align:middle;z-index:100;display:none;float:left;" >
<asp:ImageButton ID="imgbtn1" runat="server" ImageUrl="~/Images/misc/edit.png" />
<asp:ImageButton ID="imgbtn2" runat="server" ImageUrl="~/Images/misc/Rename.png" />
</asp:Panel>
</asp:Panel>
</asp:PlaceHolder>
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
Now I will try to describe the problem:
code-behind:
protected void Page_Load(object sender, EventArgs e)
{
int [] array = {1,2,3,4,5};
rptThreads.DataSource = array;
rptThreads.DataBind();
}
protected void rptThreads_ItemCreated(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item ||
e.Item.ItemType == ListItemType.AlternatingItem)
{
Panel editButtonsPanel = e.Item.FindControl("pnlEditButtons") as Panel;
editButtonsPanel.Visible = true;
Panel containerPanel = e.Item.FindControl("titleContainer") as Panel;
//Point of Interest!!!!
containerPanel.Attributes.Add("onmouseover", "ShowEditButtons('" + editButtonsPanel.ClientID + "');");
}
}
If I run the page as is, the generated html will be the following (I show only the first 2 items):
<table cellpadding="0px" cellspacing="0">
<tr style="height:50px">
<td>
<div id="titleContainer" onmouseover="ShowEditButtons('pnlEditButtons');" style="position:absolute;">
<a id="lnkTitle" style="float:left;padding-right:10px;">1</a>
<div id="pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;">
<input type="image" name="imgbtn1" id="imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" />
<input type="image" name="imgbtn2" id="imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" />
</div>
</div>
</td>
</tr>
<tr style="height:50px">
<td>
<div id="titleContainer" onmouseover="ShowEditButtons('pnlEditButtons');" style="position:absolute;">
<a id="lnkTitle" style="float:left;padding-right:10px;">2</a>
<div id="pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;">
<input type="image" name="imgbtn1" id="imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" />
<input type="image" name="imgbtn2" id="imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" />
</div>
</div>
</td>
</tr>
As you can see all divs get the SAME ID, THIS I DONT WANT!!!
But If I omit this line form the ItemCreated event:
containerPanel.Attributes.Add("onmouseover", "ShowEditButtons('" + editButtonsPanel.ClientID + "');");
The generated HTML will be the following:
<table cellpadding="0px" cellspacing="0">
<tr style="height:50px">
<td>
<div id="rptThreads_ctl01_titleContainer" style="position:absolute;">
<a id="rptThreads_ctl01_lnkTitle" style="float:left;padding-right:10px;">1</a>
<div id="rptThreads_ctl01_pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;">
<input type="image" name="rptThreads$ctl01$imgbtn1" id="rptThreads_ctl01_imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" />
<input type="image" name="rptThreads$ctl01$imgbtn2" id="rptThreads_ctl01_imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" />
</div>
</div>
</td>
</tr>
<tr style="height:50px">
<td>
<div id="rptThreads_ctl02_titleContainer" style="position:absolute;">
<a id="rptThreads_ctl02_lnkTitle" style="float:left;padding-right:10px;">2</a>
<div id="rptThreads_ctl02_pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;">
<input type="image" name="rptThreads$ctl02$imgbtn1" id="rptThreads_ctl02_imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" />
<input type="image" name="rptThreads$ctl02$imgbtn2" id="rptThreads_ctl02_imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" />
</div>
</div>
</td>
</tr>
All divs get unique IDs, and this I do want
My questions are:
1)why it happens? why this line of code messup the ids?
2)how can have the unique ID's and assign javascript in codebehind?
I can add this on aspx (it will wotk and I will get unique ids):
onmouseover='<%# "javascript:ShowEditButtons(\""+ Container.FindControl("pnlEditButtons").ClientID+ "\");" %>'
But I must do it in codebehind because I need to set the javascript only if server validate some things.
