delegates to load user control

Rishi Narula

13y2kC#

If there are 4 user controls Draged & Droped on a Page , then They all are loaded even if we need to show one user control at a time.

I have 1 page ... Fresh Request.aspx
and 4 user controls all are called on this page.
a) ucFreshRequestSeniorOfficers.ascx
b) ucFreshRequestJuniorOfficers.ascx
c) ucChangePassword.ascx
d) ucGenerateLicenses.ascx

When this page is loaded ... then one - by one all the user controls are called ... but i want to show only one means only "ucFreshRequestJuniorOfficers.ascx"

4 Replies

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Iftikar Hussain13y ago
Hi,
You can load user control dynamically depend on your condition.

Dont register any user control in your aspx code
declare one place holder in your aspx

in your code
I have considered all user control are inside UserControl folder

protected void Page_Load(object sender, EventArgs e)
{
var controlId = 1;
if (!String.IsNullOrWhiteSpace(Request.QueryString["ControlId"]))
{
controlId = Convert.ToInt32(Request.QueryString["ControlId"]);
}
LoadUserControl(controlId);
}

private void LoadUserControl(int tabId)
{
UserControl userControl = null;
switch (tabId)
{
case 1:
userControl = (UserControl)Page.LoadControl("~/UserControls/ucFreshRequestSeniorOfficers.ascx");
break;
case 2:
userControl = (UserControl)Page.LoadControl("~/UserControls/ucFreshRequestJuniorOfficers.ascx");
break;
case 3:
userControl = (UserControl)Page.LoadControl("~/UserControls/ucChangePassword.ascx");
break;
case 4:
userControl = (UserControl)Page.LoadControl("~/UserControls/ucGenerateLicenses.ascx");
break;
}
if (userControl == null) return;
userControl.InitializeAsUserControl(Page);
UserControlPlaceHolder.Controls.Add(userControl);
}

Regards,
Iftikar
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Rishi Narula13y ago
Can I use Delegates on the .aspx page to load only the necessary user control ?
0
Sivaraman Dhamodaran13y ago
Since you placed all 4 user controls in the page Fresh Request.aspx, this page will try to make a call to all ascx file. Have one control per page or provide more information on what you are trying to achieve...
0
Sanjeeb Lenka13y ago
place each user controls within separate separate panel and make the panel visible to false and true according to your requirement.
0