ASPxPopupControlBase.AllowDragging Property

Specifies whether end users can drag a control’s window.

Assembly: DevExpress.Web.v18.2.dll

Declaration

C#
VB.NET

[DefaultValue(false)]
public virtual bool AllowDragging { get; set; }

<DefaultValue(False)>
Public Overridable Property AllowDragging As Boolean

Property Value

Type	Default	Description
Boolean	false	true, if end users can drag a window; otherwise, false.

Remarks

Use the AllowDragging property to control whether end users can drag a window to another position in a web page.

Note

Adaptive mode does not support dragging.
For ASPxPopupControl only: If the ASPxPopupControl.Windows collection is empty, the AllowDragging property is applied to the default popup window. Otherwise, the AllowDragging property specifies the drag capability of all popup windows from the ASPxPopupControl.Windows collection.

Example

If a content of the ASPxPopupControl is loaded slowly, you can show a loading panel reflecting this process.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-show-the-aspxloadingpanel-while-the-content-is-loading-inside-the-aspxpopupcontrol-e1945

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="TestPage.aspx.cs" Inherits="TestPage" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h2> Page content </h2>
    </div>
    </form>
</body>
</html>

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.12.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
    Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.12.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
    Namespace="DevExpress.Web.ASPxLoadingPanel" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.12.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
    Namespace="DevExpress.Web.ASPxPopupControl" TagPrefix="dx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ASPxLoadingPanel within ASPxPopupControl</title>

    <script language="javascript" type="text/javascript">
    var showPopup = true;
    var iframe;

    function OnPopupInit (s, e) {
       iframe = popup.GetContentIFrame();

       /* the "load" event is fired when the content has been already loaded */
       ASPxClientUtils.AttachEventToElement(iframe, 'load', OnContentLoaded);
    }

    function OnPopupShown (s, e) {
        if (showPopup)
            lp.ShowInElement(iframe);
    }

    function OnContentLoaded (e) {
        showPopup = false;
        lp.Hide();
    }

    function OnButtonClick (s, e) {
       showPopup = true;
       popup.SetContentUrl(txt.GetText());

       popup.Show();
    }
    </script>

</head>
<body>
    <form id="form1" runat="server">
        <div>
            <table>
                <tr>
                    <td>
                        <b>Web site URL:</b>
                    </td>
                    <td>
                        <dx:ASPxTextBox ID="txt" ClientInstanceName="txt" runat="server" Width="250px" Text="TestPage.aspx">
                        </dx:ASPxTextBox>
                    </td>
                </tr>
            </table>
            <dx:ASPxLoadingPanel ID="lp" runat="server" ClientInstanceName="lp">
            </dx:ASPxLoadingPanel>
            <dx:ASPxPopupControl ID="popup" runat="server" AllowDragging="true" AllowResize="true"
                Height="400px" Width="600px" ClientInstanceName="popup" ContentUrl="javascript:void(0);"
                PopupHorizontalAlign="WindowCenter" PopupVerticalAlign="WindowCenter">
                <ClientSideEvents Init="OnPopupInit" Shown="OnPopupShown" />
            </dx:ASPxPopupControl>
            <dx:ASPxButton ID="btn" runat="server" Text="Show the Site" AutoPostBack="false">
                <ClientSideEvents Click="OnButtonClick" />
            </dx:ASPxButton>
        </div>
    </form>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class TestPage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Thread.Sleep(3000);

    }
}

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using DevExpress.Web.ASPxClasses;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
}

<%@ Page Language="vb" AutoEventWireup="true" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.12.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
    Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.12.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
    Namespace="DevExpress.Web.ASPxLoadingPanel" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.12.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
    Namespace="DevExpress.Web.ASPxPopupControl" TagPrefix="dx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ASPxLoadingPanel within ASPxPopupControl</title>

    <script language="javascript" type="text/javascript">
    var showPopup = true;
    var iframe;

    function OnPopupInit (s, e) {
       iframe = popup.GetContentIFrame();

       // the "load" event is fired when the content has been already loaded 
       ASPxClientUtils.AttachEventToElement(iframe, 'load', OnContentLoaded);
    }

    function OnPopupShown (s, e) {
        if (showPopup)
            lp.ShowInElement(iframe);
    }

    function OnContentLoaded (e) {
        showPopup = false;
        lp.Hide();
    }

    function OnButtonClick (s, e) {
       showPopup = true;
       popup.SetContentUrl(txt.GetText());

       popup.Show();
    }
    </script>

</head>
<body>
    <form id="form1" runat="server">
        <div>
            <table>
                <tr>
                    <td>
                        <b>Web site URL:</b>
                    </td>
                    <td>
                        <dx:ASPxTextBox ID="txt" ClientInstanceName="txt" runat="server" Width="250px" Text="TestPage.aspx">
                        </dx:ASPxTextBox>
                    </td>
                </tr>
            </table>
            <dx:ASPxLoadingPanel ID="lp" runat="server" ClientInstanceName="lp">
            </dx:ASPxLoadingPanel>
            <dx:ASPxPopupControl ID="popup" runat="server" AllowDragging="true" AllowResize="true"
                Height="400px" Width="600px" ClientInstanceName="popup" ContentUrl="javascript:void(0);"
                PopupHorizontalAlign="WindowCenter" PopupVerticalAlign="WindowCenter">
                <ClientSideEvents Init="OnPopupInit" Shown="OnPopupShown" />
            </dx:ASPxPopupControl>
            <dx:ASPxButton ID="btn" runat="server" Text="Show the Site" AutoPostBack="false">
                <ClientSideEvents Click="OnButtonClick" />
            </dx:ASPxButton>
        </div>
    </form>
</body>
</html>

Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Threading
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls

Partial Public Class TestPage
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        Thread.Sleep(3000)

    End Sub
End Class

Imports System
Imports System.Data
Imports System.Configuration
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls
Imports DevExpress.Web.ASPxClasses

Partial Public Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    End Sub
End Class

<%@ Page Language="vb" AutoEventWireup="true" CodeFile="TestPage.aspx.vb" Inherits="TestPage" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h2> Page content </h2>
    </div>
    </form>
</body>
</html>

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ASPxPopupControlBase.AllowDragging Property

Declaration

Property Value

Remarks

Example