如何添加一个取消按钮，我jqGrid的？ [英] How do I add a cancel button to my jqgrid?

问题描述

我有我的网站上它会从一个Web服务调用Ajax其结果jqGrid的（3.5.3版本）。经常查询是复杂，它需要几秒钟的加载结果。虽然它加载的是用户将看到一个对话框[载入中...]。

I've got a jqgrid (version 3.5.3) on my site which gets its results from an ajax call to a web service. Often the query is complicated and it takes a few seconds to load the result. While it is loading the user sees a box [Loading...].

在情况下，用户意识到，他们正在寻找错误的东西，客户已经要求添加一个取消按钮到电网，这将：

In case the users realise they're searching for the wrong thing, the client has asked to add a cancel button to the grid, which would:

1. 请电网忘掉它只是要求的数据
2. 在保留的结果已经由previous搜索下载

似乎没有被任何内置了这一点，所以我可能寻找一个黑客位来实现这一点。

There doesn't seem to be anything built in for this, so I'm probably looking for a bit of a hack to achieve this.

任何想法？

推荐答案

下面是我们的解决方案，这是非常相似，奥列格的，主要的区别是，我们跟踪XHRs的清单，以确保我们清理所有的请求了

Here's our solution, which is very similar to Oleg's, the main difference is that we keep track of a list of XHRs to make sure we clean all requests up

var handlerUrl = '';

jQuery(document).ready(function() {
    var xhrList = [];

    var beforeSendHandler = function() {

        var cancelPendingRequests = function() {
            jQuery.each(xhrList, function() { this.abort(); });
            xhrList = [];
            return false;
        };

        var hideLoadingUI = function() {
            $(this).hide();
            $("#load_list").hide();
        };

        cancelPendingRequests();

        $("#load_list").show();

// some faffing around to ensure we only show one cancel button at a time
        if (jQuery("#cancelrequest").length == 0) {
            jQuery(".ui-jqgrid-titlebar").append(jQuery("<button   id='cancelrequest'>Cancel</button>").click(cancelPendingRequests).click(hideLoadingUI));
        } else {
            jQuery("#cancelrequest").show();
        };  
    }


    jQuery("#list").jqGrid({
        datatype: function(postdata) {

            GetSearchCriteria(); //needed for the grid's filtering

            var xhr = $.ajax({
                //we override the beforeSend so we can get at the XHRs, but this means we have to implement the default behaviour, like showing the loading message ourselves
                beforeSend: beforeSendHandler,
                dataType: "xml",
                data: postdata,
                success: function(xmlDoc) {
                    //
                    jQuery("#cancelrequest").hide();
                    $("#load_list").hide();
                    jQuery("#list")[0].addXmlData(xmlDoc);
                    xhrList = [];
                }

...

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