Question

如何使用过滤器将数据表值存储在另一个数据表中。

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init: function () {
this.el.addEventListener('click', function (evt) {

  console.log('I was clicked at: ', evt.detail.intersection.point);
 });
}
});
</script>
</head>  
<body>
<a-scene embedded arjs='trackingMethod: best; debugUIEnabled: false;' foo>
    <a-assets>
        <a-asset-item id="crate-obj" src="model.obj"></a-asset-item>
        <a-asset-item id="crate-mtl" src="model.mtl"></a-asset-item>
        <img id="texture" src="brick.jpg">
    </a-assets>


  <a-marker preset='hiro'>
    <a-entity ><a-obj-model class="collidable" cursor-listener id="animated-marker" src="#crate-obj" position="0 -1.6 0" mtl="#crate-mtl" rotation="-90 0 0" scale="0.004 0.004 0.004" material="" obj-model=""></a-obj-model></a-entity> 
   //onclick doesn't work
    <a-entity  material=" src: url(box.png) " class="collidable" cursor- 
  listener position="0 -1 0"></a-entity>  //onclick works here

  </a-marker>
  <a-camera-static/>
  </a-scene>
  </body>
  </html>

Answer 1

这是您想要的吗？

DataTable dt = objProfitLossDT.Select("AppBalance <= 0").CopyToDataTable();

请注意，如果源中没有行，则CopyToDataTable会引发异常。所以你应该检查一下：

DataTable dt = objProfitLossDT.Clone(); // Clone is better than assigning null if you need the columns with an empty table
DataRow[] filteredRows = objProfitLossDT.Select("AppBalance <= 0");
if(filteredRows.Length > 0)
    dt = objProfitLossDT.Select("AppBalance <= 0").CopyToDataTable();

顺便说一句，您知道您也可以使用LINQ，它比Select更强大：

var filteredRows = objProfitLossDT.AsEnumerable()
    .Where(row => row.Field<int>("AppBalance) <= 0)
    .ToArray(); // if you want a DataRow[]

如何使用过滤器将数据表值存储在另一个数据表中

1 个答案: