CODEWITHSUNDEEP
asp.netcontrolsrepeater
Jacob T. Nielsen
Jacob T. Nielsen

Reputation: 2978

Dynamically adding controls in ASP.NET Repeater

I find my self having a repeater control which is being databound to an xml document. My client is now requesting that the Textbox's which are being repeater can be either a Textbox or a Checkbox.

I cannot seem to find an easyway to essentially do the following:

if ((System.Xml.XmlNode)e.Item.DataItem.Attributes["type"] == "text")
<asp:TextBox runat="server" ID="txtField" Text='<%#((System.Xml.XmlNode)Container.DataItem).InnerText %>' CssClass="std"></asp:TextBox>
else
<asp:CheckBox runat="server" ID="txtField" Text='<%#((System.Xml.XmlNode)Container.DataItem).InnerText %>' CssClass="std"></asp:TextBox>

Is there a nice way I can extend my current implementaion without have to rewrite the logic. If I could inject the control via "OnItemDataBound" that would also be fine. But I cannot seem to make it work

Upvotes: 6

Views: 24392

Answers (4)

Pavel Sem
Pavel Sem

Reputation: 1753

If there is needed to add controls based on data then there can be used this approach:

<asp:Repeater ID="ItemsRepeater" runat="server" OnItemDataBound="ItemRepeater_ItemDataBound">
    <itemtemplate>
        <div>
            <asp:PlaceHolder ID="ItemControlPlaceholder" runat="server"></asp:PlaceHolder>
        </div>
    </itemtemplate>
</asp:Repeater>

protected void ItemRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    var placeholder = e.Item.FindControl("ItemControlPlaceholder") as PlaceHolder;
    var col = (ItemData)e.Item.DataItem;

    placeholder.Controls.Add(new HiddenField { Value = col.Name });
    placeholder.Controls.Add(CreateControl(col));
}

Upvotes: 0

vmarquez
vmarquez

Reputation: 1377

I would go with mspmsp's sugestion. Here is a quick and dirty code as an example of it:

Place this in your aspx:

<asp:Repeater ID="myRepeater" runat="server" OnItemCreated="myRepeater_ItemCreated">
    <ItemTemplate>
        <asp:PlaceHolder ID="myPlaceHolder1" runat="server"></asp:PlaceHolder>
        <br />
    </ItemTemplate>
</asp:Repeater>

And this in your codebehind:

dim plh as placeholder
dim uc as usercontrol
protected sub myRepeater_ItemCreated(object sender, RepeaterItemEventArgs e)
    if TypeOf e Is ListItemType.Item Or TypeOf e Is ListItemType.AlternatingItem Then
        plh = ctype(e.item.findcontrol("myPlaceHolder1"), Placeholder)
        uc = Page.LoadControl("~/usercontrols/myUserControl.ascx")
        plh.controls.add(uc)
    end if
end sub

Upvotes: 4

mspmsp
mspmsp

Reputation: 955

In your repeater, drop a Panel, then create an event handler for the repeater's data binding event and programmatically create the TextBox or CheckBox and add it as a child control of the Panel. You should be able to get the DataItem from the event args to get information like your "type" attribute or values to feed your Text properties or css information, etc.

Upvotes: 5

Tom Ritter
Tom Ritter

Reputation: 101330

What about something similar to this in your markup in each the textbox and checkbox controls?

Visible=<%= Eval("type").tostring() == "text") %>

Upvotes: 3

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