VB.NET Repeater Simple Data Binding Without Datasource - asp.net

Im a ASP.NET beginner. I previously asked how to do some databinding to a repeater without a datasourse. Here. VB.NET Repeater Simple Data Binding Without Datasource
here is the solution someone got for me
Dim repeatTimes((TotalAdInsured)) As Integer
myRepeater.DataSource = repeatTimes
myRepeater.DataBind()
However, I now need to know how to get an index for each item in the repeater. ie
<% #index %>

<asp:Repeater runat="server" ID="rptAwesome">
<ItemTemplate>
<%# Container.DataItem %> <%# Container.ItemIndex %><br />
</ItemTemplate>
</asp:Repeater>

Related

Using c# in Web Forms to passing parameter to user control

From an aspx page, I am trying to display a user control for each item in a collection, but the C# seems to be ignored when tryign to set the UserControl parameter:
<%foreach (Fetus item in this.pregnancy.Fetus) {%>
//this returns a GUID:
"<%= item.Id.ToString() %>"
//this does not work, returns the characters between "" like < %= item.Id.ToString()%>:
<uc1:AntepartumCTGChart runat="server" ID="AntepartumCTGChart" FetusId="<%= item.Id.ToString()%>" />
<% } %>
I would expect this to work, what's wrong?
You have to use a data binding expression
<uc1:AntepartumCTGChart runat="server" ID="AntepartumCTGChart" FetusId='<%# item.Id.ToString()%>' />
But you have to call DataBind() in code behind for that to work.
You can also use a Repeater
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<uc1:AntepartumCTGChart runat="server" ID="AntepartumCTGChart" FetusId='<%# Eval("id").ToString()%>' />
</ItemTemplate>
</asp:Repeater>
And then bind data to it in code behind
Repeater1.DataSource = pregnancy.Fetus;
Repeater1.DataBind();

Repeater PageCount and PageIndex

is there pageindex or pagecount for repeater? i able to do with gridview and could not find much with repeater and not in code-behind too, how would i do PageIndex and PageCount in Repeater?
Page <%# rpt.PageIndex + 1 %> of <%# rpt.PageCount %>
<asp:Repeater ID="rpt" runat="server" OnItemCommand="rpt_OnItemCommand" OnItemDataBound="rpt_OnItemDataBound">
<HeaderTemplate>
<div >
<div >
Page <%# rpt.PageIndex + 1 %> of <%# rpt.PageCount %>
</div>
</div>
</HeaderTemplate>
<ItemTemplate ......
</asp:Repeater>
Repeater control does not support paging out of the box, which means you have to implement it yourself. One way (and the easiest probably) is to use PagedDataSource object, which encapsulates paging-related properties and logic. There is a couple of examples in web on how to accomplish this: example one, example two, example three.

How to get parent datasource Eval() inside a nested Repeater? [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Accessing parent data in nested repeater, in the HeaderTemplate
I have a nested repeater being databound... let's say the top level repeater is an OrderRow and the inner repeaters are bound to LineItem rows from my DB. ASPX is something like this:
<asp:Repeater ID="rptOrder" runat="server">
<ItemTemplate>
<%# Eval("OrderID") %>:<br/>
<asp:Repeater ID="rptLineItems" runat="server">
<ItemTemplate>
<%# Eval("SomeColumn1"); %>
<%# Eval("SomeColumn2"); %>
<%# Eval("SomeColumn3"); %>
</ItemTemplate>
<FooterTemplate>
<asp:Button ID="btnAddLine" runat="server" CommandArgument=<%# ???? %> />
</FooterTemplate>
</asp:Repeater>
</ItemTemplate
</asp:Repeater>
Now the button on the inner footer will be used to add a new line item... but the command argument needs to be the OrderID from the outer repeater, so we know which order to add to. Obviously a regular Eval() call won't work here, because it will have the inner repeater's DataRowView as a source [actually, it won't, since it's in the footer]. How do I get this value? Am I going to have to set this dynamically in the ItemDataBound event of the outside repeater?
Since the call are serial you can use the code behind to save the last order id and use it later.
Here is the idea.
<asp:Repeater ID="rptOrder" runat="server">
<ItemTemplate>
<%#GetOrderID(Container.DataItem)%><br />
<asp:Repeater ID="rptLineItems" runat="server">
<ItemTemplate>
<%# Eval("SomeColumn1"); %>
<%# Eval("SomeColumn2"); %>
<%# Eval("SomeColumn3"); %>
</ItemTemplate>
<FooterTemplate>
<asp:Button ID="btnAddLine" runat="server" CommandArgument=<%=cLastOrderID%> />
</FooterTemplate>
</asp:Repeater>
</ItemTemplate
</asp:Repeater>
and on call behind
public int cLastOrderID = -1;
protected string GetOrderID(object oItem)
{
cLastOrderID = (int)DataBinder.Eval(oItem, "OrderID");
return cLastOrderID.ToString();
}
What I do here is that I call the GetOrderID to return the OrderID and I save it in a global value, and then later in the footer I use this global value. Hope this helps you.

asp.net repeater with usercontrol - setting commandargument

I have the following repeater code:
<asp:Repeater ID="repMain" runat="server" OnItemCommand="repMain_ItemCommand" EnableViewState="false">
<ItemTemplate>
<dmg:testcontrol runat="server" MyData=<%#Container.DataItem %>>
</dmg:testcontrol>
</ItemTemplate>
</asp:Repeater>
The testcontrol usercontrol looks like:
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="TestControl.ascx.cs" Inherits="TestRepeater.TestControl" %>
<asp:Literal runat="server" ID="litMain" Text="<%#MyData.MyValue %>"></asp:Literal>
<asp:DropDownList runat="server" ID="dropdownMain"></asp:DropDownList>
<asp:Button runat="server" ID="btnMain" Text="Click Me" CommandName="Update" CommandArgument="<%#dropdownMain.SelectedValue%>"/>
Is it possible for me to send through the dropdownMain.SelectedValue as the CommandArgument?
Just now it is an empty string.
Thanks
Duncan
PS This is related to ASP.NET Repeater not binding after ItemCommand but I thought the two sufficiently different to keep apart.
A bit old question but I just my self found the answer to this one.
CommandArgument="<%#dropdownMain.SelectedValue%>"
Needs to look like this instead with single quotes! All inline codes within a asp.net controls have to be done this way instead.
CommandArgument='<%#dropdownMain.SelectedValue%>'
Why not get the selected value, and use it inside the Command function ?
(why to try to send it as argument, from the moment you can get it inside the command called function and its the same)

nested repeater pass value in header template

I have a nested repeater and i want to pass value in its header. Here is my code so far..
The main problem is the id of the control in header template is also coming from code behind.
<asp:Repeater ID="RptrProgCategory" runat="server">
<ItemTemplate>
<asp:Repeater ID="RptrPrograms" runat="server">
<HeaderTemplate><input type="hidden" id="<%= questvalue%>"/></HeaderTemplate>
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "cat") %>
</ItemTemplate>
</asp:Repeater>
</ItemTemplate>
</asp:Repeater>
I want value in questvalue from code behind. Any idea how to achieve this?
Edit: I wanted to put this value in a DataTable and bind that value in Repeater bcoz i want output like this may be <%# DataBinder.Eval(Container.DataItem, "questvalue") %> instead of <%= questvalue%>..but in tht case i am not able to find the control
Category1(id of hidden field )
subcat1
subcat2
subcat3
Category2(id of hidden field)
subcat4
subcat5..and so on..
Repeater mainRepeater = this.Page.FindControl("RptrProgCategory") as Repeater;
Repeater nestedRepeater = mainRepeater.FindControl("RptrProgCategory") as Repeater;
You can then do a FindControl in nestedRepeater for questValue.
Add a runat='server' to questvalue so that you can access it in code behind.
I am writing this from memory, syntax might not be correct but it should get you off in the right direction.
set the id of the control in the repeater to something like mycontrolId - and then on OnItemDataBound - (or even OnItemCreated) use findcontrol("mycontrolId") - and then change the id of the control to your questvalue param.

Resources