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Common ExtraParams for all DirectEvents

  1. #1
    Mar 24, 2011, 8:38 AM

    Common ExtraParams for all DirectEvents

    Hi all!
    I have multiple buttons and comboboxes, which uses DirectEvents. All that events requires ExtraParams, and many of them are same. Is there way to avoid copy-paste of this params?
  2. #2
    Mar 25, 2011, 12:18 AM
    Hi,

    I can suggest this way:

    Example
    <%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Button1_Click(object sender, DirectEventArgs e)
    {
        string s = e.ExtraParams["param1"] + " " + e.ExtraParams["param2"] + " " + e.ExtraParams["param3"];
        X.Msg.Alert("Button1_Click", s).Show();
    }

    protected void Button2_Click(object sender, DirectEventArgs e)
    {
        string s = e.ExtraParams["param1"] + " " + e.ExtraParams["param2"] + " " + e.ExtraParams["param3"];
        X.Msg.Alert("Button1_Click", s).Show();
    }
</script>

<!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>Ext.Net Example</title>

    <script type="text/javascript">
        var setDefaultExtraParams = function (extraParams) {
            extraParams.param1 = "Param1";
            extraParams.param2 = "Param2";
        }
    </script>

</head>
<body>
    <form runat="server">
    <ext:ResourceManager runat="server" />
    <ext:Button runat="server" Text="Button1">
        <DirectEvents>
            <Click OnEvent="Button1_Click" Before="setDefaultExtraParams(extraParams);">
                <ExtraParams>
                    <ext:Parameter Name="param3" Value="Button1" Mode="Value" />
                </ExtraParams>
            </Click>
        </DirectEvents>
    </ext:Button>
    <ext:Button runat="server" Text="Button2">
        <DirectEvents>
            <Click OnEvent="Button2_Click" Before="setDefaultExtraParams(extraParams);">
                <ExtraParams>
                    <ext:Parameter Name="param3" Value="Button2" Mode="Value" />
                </ExtraParams>
            </Click>
        </DirectEvents>
    </ext:Button>
    </form>
</body>
</html>
  3. #3
    Mar 25, 2011, 3:41 AM
    That's cool, thanks!
  4. #4
    Mar 25, 2011, 11:01 AM
    How can I retrieve Ext.NET control name in setDefaultExtraParams function, like I did in ExtraParam Value: "#{cbGroup}.value"?
  5. #5
    Mar 25, 2011, 1:41 PM
    Please wrap <scipt> in <ext:XScript> control and use #{} syntax.
  6. #6
    Mar 28, 2011, 2:31 AM
    Thanks, it works.
  7. #7
    Apr 04, 2012, 5:12 PM
    Also you can use the ResourceManager BeforeAjaxRequest listener. In this case you will avoid setting up a Before handler for each DirectEvent.

    Example
    <%@ Page Language="C#" %>
 
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
 
<script runat="server">
    protected void Button_Click(object sender, DirectEventArgs e)
    {
        string s = e.ExtraParams["param1"] + " " + e.ExtraParams["param2"] + " " + e.ExtraParams["param3"];
        X.Msg.Alert("Button_Click", s).Show();
    }
</script>
 
<!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>Ext.NET Example</title>
 
    <script type="text/javascript">
        var setDefaultExtraParams = function (extraParams) {
            extraParams.param1 = "Param1";
            extraParams.param2 = "Param2";
        };
    </script>
 
</head>
<body>
    <ext:ResourceManager runat="server">
        <Listeners>
            <BeforeAjaxRequest Handler="setDefaultExtraParams(extraParams);" />
        </Listeners>
    </ext:ResourceManager>
    <ext:Button runat="server" Text="Button 1">
        <DirectEvents>
            <Click OnEvent="Button_Click">
                <ExtraParams>
                    <ext:Parameter Name="param3" Value="Button1" Mode="Value" />
                </ExtraParams>
            </Click>
        </DirectEvents>
    </ext:Button>
    <ext:Button runat="server" Text="Button 2">
        <DirectEvents>
            <Click OnEvent="Button_Click">
                <ExtraParams>
                    <ext:Parameter Name="param3" Value="Button2" Mode="Value" />
                </ExtraParams>
            </Click>
        </DirectEvents>
    </ext:Button>
</body>
</html>
  8. #8
    Apr 05, 2012, 2:26 AM
    That's awesome, thanks!

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