JQuery Cascade dropdown problem?

Posted by omoto on Stack Overflow See other posts from Stack Overflow or by omoto
Published on 2009-07-05T19:43:04Z Indexed on 2010/05/13 17:24 UTC
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Hi All!

I'm using JQuery based Cascade plugin probably it's working, but I found a lot of problems with it

Maybe somebody already faced with this plugin and maybe could help.

So, I using this plugin for location filtration

location location

Here comes my CS code:

public JsonResult getChildren(string val)
	{
		if (val.IsNotNull())
		{
			int lId = val.ToInt();
			Cookie.Location = val.ToInt();
			var forJSON = from h in Location.SubLocationsLoaded(val.ToInt())
						  select new { When = val, Id = h.Id, Name = h.Name, LocationName = h.LocationType.Name };
			return this.Json(forJSON.ToArray());
		}
		else
			return null;
	}

Here comes my JS code:

<script type="text/javascript">
function commonMatch(selectedValue) {
	$("#selectedLocation").val(selectedValue);
	return this.When == selectedValue;
};
function commonTemplate(item) {
	return "<option value='" + item.Id + "'>" + item.Name + "</option>";
};


$(document).ready(function() {
	$("#chained_child").cascade("#Countries", {
		ajax: {
			url: '/locations/getChildren'
		},
		template: commonTemplate,
		match: commonMatch
	}).bind("loaded.cascade", function(e, target) {
		$(this).prepend("<option value='empty' selected='true'>------[%Select] Län------</option>");
		$(this).find("option:first")[0].selected = true;
	});
	$("#chained_sub_child").cascade("#chained_child", {
		ajax: {
			url: '/locations/getChildren'
		},
		template: commonTemplate,
		match: commonMatch
	}).bind("loaded.cascade", function(e, target) {
		$(this).prepend("<option value='empty' selected='true'>------[%Select] Kommun------</option>");
		$(this).find("option:first")[0].selected = true;
	});
	$("#chained_sub_sub_child").cascade("#chained_sub_child", {
		ajax: {
			url: '/locations/getChildren'
		},
		template: commonTemplate,
		match: commonMatch
	}).bind("loaded.cascade", function(e, target) {
		$(this).prepend("<option value='empty' selected='true'>------[%Select] Stad------</option>");
		$(this).find("option:first")[0].selected = true;

	});

});

I added one condition to jquery.cascade.ext.js

if (opt.getParentValue(parent) != "empty")
			$.ajax(_ajax);

To prevent Ajax request without selected value, but I faced with problem, when I reset selection in first box 3d box and bellow does not refresh: WTF?

And second issue: I would like to know where is best place to inject my own function that will do something, with one requirement - I need to know that all boxes finished work.

If somebody worked within let me know maybe we could together find solution. Thanks in advice...

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