我认为错误的原因在于未创建数据透视表（因为 Ajax 和构建数据透视表的时间太短），但在创建之前调用了删除分组，这当然会失败。要纠正此问题，我建议您使用最后几个命令的 setTimeout - 即：

grid.jqGrid('jqPivot',
...
);  
setTimeout(function() {
    $('#gridPartNumberSearchGridView').jqGrid('groupingRemove');
    $("#gridPartNumberSearchGridView").hideCol("MaterialID");
}, 800);

我们需要从 Pivot 中删除分组，因此我们使用 groupingRemove 方法。除了使用“MyFormatterI”将数字格式化为字符串外，还有其他方法可以获取文本吗？ 是否可以直接通过 Pivot JQgrid 进行 ajax 调用（我试过，但没有成功），而不是从外部调用？

var MyConverter = function (val) 
{ return (val.replace(/"/g, "")).replace(/'/g, "").replace(/\s/g, '_'); 
}


var MyFormatterI = function (cellvalue, options, rowObject) {
    //debugger;
    var storedString = localStorage.getItem('myEventsArray');
    var parsedObject = JSON.parse(storedString);
    if (options.rowId != "") {
        if (cellvalue === undefined) { return ''; }
        else if (cellvalue.toString().length > 10) { window.IsMultiple = true; return "*"; }
        else if (isNaN(cellvalue) && cellvalue != undefined && parsedObject!=null) {
            for (var i = 0; i < parsedObject.length ; i++) {
                if ((parsedObject[i].MaterialDescription == rowObject["MaterialDescription"])
                    && (parsedObject[i].ZDESMaterialID == rowObject["ZDESMaterialID"])
                    && ((parsedObject[i].DimensionCodeWithDescription.replace(/\s/g, '_') == options.colModel.name) || (parsedObject[i].DimensionCodeWithDescription.replace(/\s/g, '_') + '_sum_0' == options.colModel.name))
                    && (parsedObject[i].ImperialCount == 1)) {
                    var str = parsedObject[i].ImperialWithoutUnit;
                    return retValue(str);
                }
            }
        }
        else {
            return cellvalue;
        }
    }
}

JSON 数据 (getData)：

{ MaterialID = "000000000000000079", MaterialDescription = "38/NC;A", DimensionCodes = "AA3", DimensionDescription = "RACE", ImperialWithoutUnit = "1.58", MetricWithoutUnit = "9089", ZDESMaterialID = "000000000000000079", DimensionCodeWithDescription = "RACE" <br/> AA" }
{ MaterialID = "000000000000000079", MaterialDescription = "38/NC;A", DimensionCodes = "AA6", DimensionDescription = "LARGE", ImperialWithoutUnit = "2.93", MetricWithoutUnit = "9080", ZDESMaterialID = "000000000000000079", DimensionCodeWithDescription = "LARGE RIB<br/> AA" }
{ MaterialID = "000000000000000069", MaterialDescription = "38/NC;B", DimensionCodes = "AA7", DimensionDescription = "RACE BF", ImperialWithoutUnit = "3.775", MetricWithoutUnit = "19808", ZDESMaterialID = "000000000000000069", DimensionCodeWithDescription = "RACE BF<br/> AA" }
{ MaterialID = "000000000000000069", MaterialDescription = "38/NC;B", DimensionCodes = "AA9", DimensionDescription = "BORE", ImperialWithoutUnit = "4.1654", MetricWithoutUnit = "1980", ZDESMaterialID = "000000000000000069", DimensionCodeWithDescription = "BORE<br/> AA" }
{ MaterialID = "000000000000000059", MaterialDescription = "38/NC;C", DimensionCodes = "AA10", DimensionDescription = "SMALL RIB", ImperialWithoutUnit = "8.6250", MetricWithoutUnit = "1909", ZDESMaterialID = "000000000000000059", DimensionCodeWithDescription = "SMALL RIB<br/> AA" }
{ MaterialID = "000000000000000059", MaterialDescription = "38/NC;C", DimensionCodes = "AA11", DimensionDescription = "WIDTH", ImperialWithoutUnit = "10.8640", MetricWithoutUnit = "2290", ZDESMaterialID = "000000000000000059", DimensionCodeWithDescription = "WIDTH<br/> AA" }
{ MaterialID = "000000000000000049", MaterialDescription = "38/NC;D", DimensionCodes = "AA12", DimensionDescription = "LARGE WIDTH", ImperialWithoutUnit = "0.1600", MetricWithoutUnit = "9080", ZDESMaterialID = "000000000000000049", DimensionCodeWithDescription = "LARGE<br/> AA" }
{ MaterialID = "000000000000000049", MaterialDescription = "38/NC;D", DimensionCodes = "AA13", DimensionDescription = "LG HEIGHT", ImperialWithoutUnit = "0.1100", MetricWithoutUnit = "9080", ZDESMaterialID = "000000000000000049", DimensionCodeWithDescription = "LG<br/> AA" }
{ MaterialID = "000000000000000039", MaterialDescription = "38/NC;E", DimensionCodes = "AA14", DimensionDescription = "RACE FF", ImperialWithoutUnit = "0.1270", MetricWithoutUnit = "9097", ZDESMaterialID = "000000000000000039", DimensionCodeWithDescription = "RACE FF<br/> AA" }
{ MaterialID = "000000000000000039", MaterialDescription = "38/NC;E", DimensionCodes = "AA15", DimensionDescription = "LG RIB", ImperialWithoutUnit = "0.0500", MetricWithoutUnit = "8090", ZDESMaterialID = "000000000000000039", DimensionCodeWithDescription = "LG LENGTH<br/> AA" }

首先是一些常见的评论：jqGrid 4.6.0 已有 3.5 年的历史了！很久以来它都不再受支持。我另外写信给您说，只有发布 测试数据 和更完整的代码（ MyFormatterI 、 MyConverter 和 gridData 未在您当前代码中定义）才能分析问题。我建议您升级到免费的 jqGrid 4.15.2。它包含 jqPivot 的完整重写实现，但大多数选项是相同的。请参阅 wiki 文章 中的更多详细信息。

关于您的主要问题。可以看出，错误存在于 groupingRemove 方法中。您的代码使用 grid.jqGrid('jqPivot', ...) 创建网格（数据透视表），但您稍后使用 $('#gridPartNumberSearchGridView') 而不是 grid （请参阅 groupingRemove 和 hideCol 的调用）。我认为 $('#gridPartNumberSearchGridView') 不是 jqGrid，因此 groupingRemove 方法的调用失败。

更新： 如果您只想防止分组，您可以将 grouping: false 添加为 jqGrid 的附加参数（例如，在 rowNum: 50 附近）。

更新 2： Retro 版本 4.6 使用与免费 jqGrid 不同的参数顺序（比较 该行 和 这个 ）。如果您不想升级到免费的 jqGrid，那么您可以使用 onInitGrid 作为解决方法：

onInitGrid: function () {
    this.p.grouping = false; // reset grouping before it will be processed
}