您必须覆盖数据源的 filterPredicate.

You have to override the filterPredicate of your dataSource.

这是一个如何做的例子:工作演示

Here's an example of how to do it: Working demo

本质上，您希望指定过滤器应用于数据中的哪些属性:

Essentially, you want to specify what properties in your data the filter is applied to:

this.dataSource.filterPredicate = function(data, filter: string): boolean {
    return data.name.toLowerCase().includes(filter) || data.symbol.toLowerCase().includes(filter) || data.position.toString().includes(filter);
};