C#, how to generate new html Div during foreach loop?

Question

Depend of number of results I got like 3 results and I want to assign each result to label text and put to new Div each new line. How I do that?

Collection<PSObject> output = pipeline.Invoke(); is where I stored results.

Here a sample C# codes,

foreach(PSObject psObject in output)
        {
            Label ipLabel = new Label();
            ipLabel.Text = psObject + "\r\n";
            div1.Controls.Add(ipLabel);
        }

Here a asp.net codes,

<div id="div1" runat="server"></div>

I got the right Label results but it all displayed in 1 div line instead of every div new line .

The Repeater control sounds like what you're looking for... — David
– David, Commented Nov 20, 2013 at 19:51

Dai · Accepted Answer · 2013-11-20 19:51:10Z

20

Ideally, markup manipulation should be done using data-binding within your .aspx file rather than in your codebehind, but anyway:

foreach(PSObject psObject in output) {
    HtmlGenericControl div = new HtmlGenericControl("div");
    div.Controls.Add( new Label() { Text = psObject + "\r\n"; } );
    div1.Controls.Add( div );
}

This is how I would do it in the aspx file:

<div id="div1">
<% foreach(PSObject psObject in output) { %>
    <div>
    <%: psObject %>
    </div>
<% } //foreach %>
</div>

Note the use of <%: foo %> which is equivalent to <%= Server.HtmlEncode( foo ) %>.

answered Nov 20, 2013 at 19:51

Dai

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7 Comments

Dai Over a year ago

@StudentIT "labels" don't exist in rendered HTML, the id="" attribute is applied to some other markup. Please explain what you ultimately want to accomplish.

StudentIT Over a year ago

I wanted to add textBox ID in div.Controls.Add(new TextBox() { Text = "" }); empty textboxes during foreach loop because after user fill out name on each textbox, I want to be able to grab those specific textboxes to get values and pass back to server to update.

Dai Over a year ago

@StudentIT Using dynamically-created controls in ASP.NET WebForms is more complicated, you'll need to override the CreateChildControls method. The approach I put into my post is not suitable for adding input controls to a page, sorry.

codeMonkey Over a year ago

It would appear that if you're trying to add an attribute like <div id="someid" runat="server" some-attribute="<%: foo %>"></div> you get some-attribute="<%: foo %>" in the HTML--only if you're placing it on another control. Why is that? Is there a way around that?

Dai Over a year ago

@codeMonkey You shouldn't ever get that: you'll get a compiler error (from the runtime compiler). Are you confusing .aspx with .cshtml?

|

McGarnagle · Accepted Answer · 2013-11-20 19:52:25Z

2

The "Panel" control outputs a div, so maybe you'd like to wrap the Label there:

foreach(PSObject psObject in output)
{
    Panel ipPanel = new Panel();
    Label ipLabel = new Label();
    ipLabel.Text = psObject;
    ipPanel.Controls.Add(ipLabel);
    div1.Controls.Add(ipPanel);
}

You could also put a "
" (newline for HTML, roughly) inside the label:

foreach(PSObject psObject in output)
{
    Label ipLabel = new Label();
    ipLabel.Text = psObject + "<br/>";
    div1.Controls.Add(ipLabel);
}

answered Nov 20, 2013 at 19:52

McGarnagle

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