Develop Reference

access items in repeater

I have a repeater and I am trying to access labels inside it. Here is my method:
protected void ButtonlarıTemizle()
{
int n = 0;
foreach (RepeaterItem item in Repeater1.Items)
{
n++;
Label lbl = item.FindControl("lblApproved") as Label;
Button btn = item.FindControl("btnAssignApproved") as Button;
if (lbl.Text.Equals("Satışa Dönmüştür"))
{
btn.Visible = false;
lbl.ForeColor = System.Drawing.Color.Blue;
}
}
Response.Write("<script lang='JavaScript'>alert('"+n+"');</script>");
}
I can access inside repeater but here is the problem: I can't access the last item of repeater. I put that 'n' variable to control how many times I turn inside foreach loop and I see that n always gives -1 of item numbers. For example if I have 3 items in repeater, n is 2, if there is 1 item in repeater, n is 0. What am I doing wrong in here ?
Edit: I am writing my .aspx page since it asked
<asp:Repeater ID="Repeater1" runat="server" DataSourceID="EntityDataSourceTeklifler" OnItemCommand="Repeater1_ItemCommand">
<ItemTemplate>
<div class="panel panel-primary">
<div class="panel-body">
<strong>Teklif No.</strong> <%#Eval("TeklifId") %><br />
<strong>Teklif Tarihi:</strong> <%#Eval("TeklifTarih") %><br />
<strong>Teklifi Hazırlayan:</strong> <%#Eval("Name") %> <%#Eval("Surname") %><br />
<strong>Firma Adı:</strong> <%#Eval("FirmaAdi") %><br />
<strong>Ürünler:</strong><br />
<%#Eval("TeklifSiparis") %>
<strong>Genel Toplam:</strong> <%#Eval("TeklifTutar") %>$<br />
<strong>Not:</strong><br />
<%#Eval("TeklifNot") %><br />
<strong>Teklif Durumu:</strong> <asp:Label ForeColor="Red" ID="lblApproved" runat="server" Text='<%# CheckIfApproved(Convert.ToBoolean(Eval("Approved"))) %>'></asp:Label><br /><br />
<asp:Button ID="btnAssignApproved" runat="server" Text="Satışa Döndü Olarak İşaretle" CssClass="btn btn-primary" CommandName="Done" CommandArgument='<%# Eval("TeklifId") %>' />
</div>
</div>
</ItemTemplate>
</asp:Repeater>

I am not sure why you explicitly calling a different method but what you are doing can be easily done in ItemDataBound event of repeater control:-
<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound"
Then handler it like this:-
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item)
{
Label lbl = e.Item.FindControl("lblApproved") as Label;
Button btn = e.Item.FindControl("btnAssignApproved") as Button;
if (lbl.Text.Equals("Satışa Dönmüştür"))
{
btn.Visible = false;
lbl.ForeColor = System.Drawing.Color.Blue;
}
}
}
Please note there is no need to do any loop on your repeater items. Repeater ItemDataBound event will fire for each item when it is bounded. Also, if you want to have a count simply declare a variable outside this method and increment it inside this event.

How to get updated Textbox value from Repeater?

I have a repeater control as listed below. It has a textbox control. When a save button is clicked, I need to get the updated text from the textbox. I have the following code; but it gives me the old value when I take the textbox text.
How can we get the updated text?
Code Behind
protected void Save_Click(object sender, EventArgs e)
{
foreach (RepeaterItem item in repReports.Items )
{
if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem )
{
string updatedEmail = ((TextBox)item.Controls[5]).Text;
string originalEmail = ((HiddenField)item.Controls[7]).Value;
}
}
}
Control Markup
<div class="repeaterTableBorder">
<asp:Repeater ID="repReports" runat="server">
<ItemTemplate>
<div id="repeaterIdentifier" class="repeaterIdentifier">
<div class="reportTitle">
<%# Eval("ReportName") + ":"%>
<asp:HiddenField ID="hdnLastChangeTime" runat="server" Value= '<%# ((DateTime)Eval("RecordSelectionTime")).ToString("MM/dd/yyyy hh:mm:ss.fff tt")%>' />
<asp:HiddenField ID="hdnReportID" runat="server" Value='<%# Eval("ReportTypeCode")%>' />
</div>
<div class="reportFrequency">
<%# " Frequency - Weekly" %>
</div>
</div>
<div class="reportContent">
<div class="repeaterLine">
<asp:TextBox ID="txtEmailRecipients" runat="server" class="textEdit"
Text='<%# Eval("ExistingRecipients") %>'
TextMode="MultiLine"></asp:TextBox>
<asp:HiddenField ID="hdnOriginalRecipients" runat="server" Value='<%# Eval("ExistingRecipients")%>' />
</div>
</div>
</ItemTemplate>
</asp:Repeater>
</div>

I assume that you are binding the Repeater to it's DataSource also on postbacks. You should do that only if(!IsPostBack). Otherwise the values will be overwritten.
protected void Page_Load(Object sender, EventArgs e)
{
if(!IsPostBack)
{
// databinding code here
}
}

How to Add UserControl Conditionally to Repeater Control?

I want to know how to Add a UserControl Conditionally to a Repeater Control. I have tried to add it to the placeholder which is in Repeater Control but unable to load the usercontrol. This following code doesn't work.
<asp:Repeater ID="ResultsRepeater" runat="server">
<HeaderTemplate></HeaderTemplate>
<ItemTemplate>
<div>
<asp:PlaceHolder ID="PlaceHolder1" runat="server">
</asp:PlaceHolder>
</div>
</ItemTemplate>
</asp:Repeater>
public void GetStatus(int i)
{
UserControl uc = new UserControl();
if(i==1)
{
uc = LoadControl("DraftList.ascx") as UserControl;
}
else if(i==2)
{
uc = LoadControl("FinalList.ascx") as UserControl;
}
PlaceHolder p1 = (PlaceHolder)ResultsRepeater.Items[0].FindControl("PlaceHolder1");
p1.Controls.Add(uc);
}

Is there some reason that you don't want to just handle all of this in the aspx? That would be the simplest and cleanest option:
<asp:Repeater runat="server" ID="ResultsRepeater">
<ItemTemplate>
<uc1:DraftList ID="DraftList1" runat="server" Visible='<%# ((int)Eval("Status") == 1)%>' />
<uc2:FinalList ID="FinalList1" runat="server" Visible='<%# ((int)Eval("Status") == 2)%>' />
</ItemTemplate>
</asp:Repeater>
If a control is not visible, (i.e., Visible=false) then no markup is rendered, so coding in this fashion would not create any more work for the server or the client browser, while having the benefit of being much easier to read and providing user control properties at design-time.
You would just need to make sure to register your controls at the top of the page:
<%# Register src="DraftList.ascx" tagname="DraftList" tagprefix="uc1" %>
<%# Register src="FinalList.ascx" tagname="FinalList" tagprefix="uc2" %>

Why don't you try adding it within the repeaters ItemDataBound event? I.e.,
<asp:Repeater ID="ResultsRepeater" OnItemDataBound="ResultsRepeater_ItemDataBound" runat="server">
<HeaderTemplate></HeaderTemplate>
<ItemTemplate>
<div>
<asp:PlaceHolder ID="PlaceHolder1" runat="server">
</asp:PlaceHolder>
</div>
</ItemTemplate>
</asp:Repeater>
and in the code behind
protected void ResultsRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
Panel PlaceHolder1 = (Panel)e.Item.FindControl("PlaceHolder1");
// declare/obtain the value of i given the DataItem
// e.g.,
int i = ((int)e.Item.DataItem); // or however you're getting i
if (i == 1)
{
var uc = LoadControl("~/DraftList.ascx");
PlaceHolder1.Controls.Add(uc);
}
else if (i == 2)
{
var uc = LoadControl("~/FinalList.ascx");
PlaceHolder1.Controls.Add(uc);
}
}
}
Judging by your last comment (to the question) you might need to also make sure you've attached and bound your datasource to the repeater as well. I.e.,
ResultsRepeater.DataSource = dataSource; //whatever your datasource is e.g., datatable, IEnumerable list etc
ResultsRepeater.DataBind();

Accessing Textboxes in Repeater Control

All the ways I can think to do this seem very hackish. What is the right way to do this, or at least most common?
I am retrieving a set of images from a LINQ-to-SQL query and databinding it and some other data to a repeater. I need to add a textbox to each item in the repeater that will let the user change the title of each image, very similar to Flickr.
How do I access the textboxes in the repeater control and know which image that textbox belongs to?
Here is what the repeater control would look like, with a submit button which would update all the image rows in Linq-to-SQL:
alt text http://casonclagg.com/layout.jpg
Edit:
This code works
Just make sure you don't blow your values away by Binding outside of if(!Page.IsPostBack) like me.. Oops.
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<div class="itemBox">
<div class="imgclass">
<a title='<%# Eval("Name") %>' href='<%# Eval("Path") %>' rel="gallery">
<img alt='<%# Eval("Name") %>' src='<%# Eval("Path") %>' width="260" />
</a>
</div>
<asp:TextBox ID="TextBox1" Width="230px" runat="server"></asp:TextBox>
</div>
</ItemTemplate>
</asp:Repeater>
And Submit Click:
protected void Button1_Click(object sender, EventArgs e)
{
foreach (RepeaterItem item in Repeater1.Items)
{
TextBox txtName = (TextBox)item.FindControl("TextBox1");
if (txtName != null)
{
string val = txtName.Text;
//do something with val
}
}
}

Have you tried something like following on the button click:-
foreach (RepeaterItem item in Repeater1.Items)
{
TextBox txtName= (TextBox)item.FindControl("txtName");
if(txtName!=null)
{
//do something with txtName.Text
}
Image img= (Image)item.FindControl("Img");
if(img!=null)
{
//do something with img
}
}
/* Where txtName and Img are the Ids of the textbox and the image controls respectively in the repeater.*/
Hope this helps.

.aspx
<asp:Repeater ID="rpt" runat="server" EnableViewState="False">
<ItemTemplate>
<asp:TextBox ID="txtQty" runat="server" />
</ItemTemplate>
</asp:Repeater>
.cs
foreach (RepeaterItem rptItem in rpt.Items)
{
TextBox txtQty = (TextBox)rptItem.FindControl("txtQty");
if (txtQty != null) { Response.Write(txtQty.Text); }
}
Be sure to add EnableViewState="False" to your repeater, otherwise you will get empty string. (That wasted my time, dont waste yours :) )

On postback, you can iterate over the collection of RepeaterItems in repeater.Items. You could then retrieve each TextBox with code such as
TextBox tbDemo = (TextBox)rptr.Items[index].FindControl("textBox");

Hide an element in ASP.net based on an if inside a Repeater

I know how to use a simple If statement wrapped in the <%# tags to hide something, but I don't know how to do it in a repeater when I need to access Container.DataItem, as in I need the dataItem currently being 'repeated'
eg
if (CurrentValidationMessage.Link != "")
{
show a hyperlink
}
Markup:
<asp:Repeater ID="repValidationResults" runat="server">
<HeaderTemplate>
</HeaderTemplate>
<ItemTemplate>
<a href='<%# ((MttImportValidationMessage)Container.DataItem).EditLink %>'> Link to erroneous Milestone </a>
<%# ((MttImportValidationMessage)Container.DataItem).Message %>
<br />
</ItemTemplate>
</asp:Repeater>

It might be more maintainable if you just tagged the controls in the repeater with id's and runat='server' and reference the DataItem in the ItemDataBound event by using e.Item.DataItem.
Then use e.Item.FindControl to reference your controls in the ItemTemplate and perform your logic.
protected void repeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
{
Domain.Employee employee = (Domain.Employee)e.Item.DataItem;
Control myControl = (Control)e.Item.FindControl("controlID");
//Perform logic
}
}

use ItemDataBound Event with repeater, and make the "a" tag with a runat="server" property and ID
protected void repValidationResults_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
RepeaterItem item = e.Item;
if (item.ItemType == ListItemType.AlternatingItem || item.ItemType == ListItemType.Item)
{
HyperLink link = (HyperLink) item.FindControl("link");
//Do all your logic here :)
}
}
MarkUp:
<asp:Repeater ID="repValidationResults" runat="server">
<HeaderTemplate>
</HeaderTemplate>
<ItemTemplate>
<a runat="server" ID="link"> Link to erroneous Milestone </a>
<%# ((MttImportValidationMessage)Container.DataItem).Message %>
<br />
</ItemTemplate>
</asp:Repeater>