TypeError:document.getElementB...

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hi guys,

i am stuck here. i don't know jquery. please help me.

actually what happens when i click on button it displays jquery popup. but it doesn't display. when i do ctrl+shift+J i found "TypeError:document.getElementById("ctl00_ContentPlaceHolder1_txtJobDetails") is null" and "ReferenceError:DoubleBookingPopUp is not defined". here is my code:

C#

public void cmdSubmit_Click(object sender, EventArgs e)
{
   System.Text.StringBuilder sb = new System.Text.StringBuilder();
   sb.Append("<script type = 'text/javascript' language = 'javascript'>");
   lblMessage.Text = "";
   sb.Append("DoubleBookingPopUp()");
   sb.Append("</script>");
}

C#

function DoubleBookingPopUp()
{
    //window.open('SubmitNewBooking.aspx','CustomPopUp','width=350, height=200, menubar=no, resizable=no ');

    $(function() {
        // a workaround for a flaw in the demo system (http://dev.jqueryui.com/ticket/4375), ignore!
        $( "#dialog:ui-dialog" ).dialog( "destroy" );


        $( "#dialog-confirm1" ).dialog({
            resizable: false,
            height:500,
            width:800,
            modal: true,
            closeOnEscape: false,
            open: function(event, ui) { $(".ui-dialog-titlebar-close").hide(); },

            buttons: {
                "Continue": function() {
                    __doPostBack('', 'DBLBooking');
                    //$( this ).dialog( "close" );
                },
                Cancel: function() {

                    $( this ).dialog( "close" );
                }
            }


        });


    })
    document.getElementById('ctl00_ContentPlaceHolder1_lblMessage').innerHTML = "";
    document.getElementById('ctl00_ContentPlaceHolder1_lblMessage2').innerHTML = "";
    return false;
}

thanks,
krunal

Posted 28-Jul-12 0:58am

kk2014

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woutercx · Answer 1 · 2012-07-28T01:19:00

I think that you should place the code that is now in cmdSubmit_Click in the Page_Load like this:

http://msdn.microsoft.com/en-us/library/ms178207.aspx[^]

and then

public void cmdSubmit_Click(object sender, EventArgs e)
{
   lblMessage.Text = "";
}

void Page_Load(object sender, EventArgs e)
{
   System.Text.StringBuilder sb = new System.Text.StringBuilder();
   sb.Append("<script type = 'text/javascript' language = "'javascript'">");
   sb.Append("DoubleBookingPopUp()");
   sb.Append("</script>");

if (!ClientScript.IsClientScriptBlockRegistered("exampleScript"))
    ClientScript.RegisterStartupScript(this.GetType(), "exampleScript",
sb.ToString());

cmdSubmit.Attributes.Add("onclick", "DoubleBookingPopUp();");
}

Or a simpler version of this would be:

C#

void Page_Load(object sender, EventArgs e)
{
   System.Text.StringBuilder sb = new System.Text.StringBuilder();
   sb.Append("<script type = 'text/javascript' language = "'javascript'">");
   sb.Append("DoubleBookingPopUp()");
   sb.Append("</script>");

cmdSubmit.Attributes.Add("onclick", sb.ToString());
}

But your function would have to return true (if you want to submit) or false (if you don't want to submit).
But I see that you already do __doPostBack, so that would not be necessary I think.