What is the easiest way to set the contents of an <asp:ContentPlaceHolder>
programmatically? I imagine ill have to do a Master.FindControl
call?
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问题:
回答1:
If your page inherits from a MasterPage, then you should have an asp:Content control on your page with some id, like so:
<asp:Content runat="server" ID="myContent" ContentPlaceHolderID="masterContent">
</asp:Content>
You should be able to reference this in your codebehind and add whatever you want to it.
public void Page_Load( object sender, EventArgs e )
{
HtmlContainerControl div = new HtmlGenericControl( "DIV" );
div.innerHTML = "....whatever...";
myContent.Controls.Clear();
myContent.Controls.Add(div);
}
回答2:
If you are adding controls to a blank page then you do Page.Controls.Add()....no?
回答3:
I use a custom extension method that searches a control (a placeholder for example) recursively to find the control you're looking for by Id and return it. You can then populate the returned control as required. Call this in a foreach loop iterating over your list of controls to populate.
public static class ControlExtensions
{
/// <summary>
/// recursive control search (extension method)
/// </summary>
public static Control FindControl(this Control control, string Id, ref Control found)
{
if (control.ID == Id)
{
found = control;
}
else
{
if (control.FindControl(Id) != null)
{
found = control.FindControl(Id);
return found;
}
else
{
foreach (Control c in control.Controls)
{
if (found == null)
c.FindControl(Id, ref found);
else
break;
}
}
}
return found;
}
}