如何在复制和粘贴多个文件时使FileSystemWatcher更改事件只执行一次？ C＃

Question

情况是这样的，我有一个datagridview从xml文件加载一些数据，所以，我使用一个函数加载这个信息，并在这个函数中第一行清理完整的datagridview，我正在使用FileSystemWatcher用于处理将新文件插入特定文件夹并刷新表时的事件，当我只移动或创建一个文件时它可以正常工作，但是当我将文件移动到文件夹或复制＆amp;粘贴，程序抛出一条错误消息，我认为这是因为事件是为每个复制或​​移动的文件触发，并且当它再次清理时它不允许完成get files方法，我不确定我是不是清楚，我将在这里告诉你代码的各个部分，它在包含GetFiles方法的类的构造函数中初始化的FileWatcher实例

GetFiles方法：

html,
body {
  font: 400 16px/1.2 Consolas;
  font-variant: small-caps;
  width: 100%;
  height: 100%;
}

.chx {
  display: none
}

.lab {
  display: inline-block;
  margin: 10px;
  cursor: pointer;
}

.lab::before {
  content: '\1f518';
  box-shadow: 0px 1.5px 1px 2.5px rgba(51, 51, 51, 0.3);
  border-radius: 50%;
}

#c1:checked~.header .options .c1::before,
#c2:checked~.header .options .c2::before,
#c3:checked~.header .options .c3::before,
#c4:checked~.header .options .c4::before {
  content: '\1f535';
  box-shadow: 0px 1.5px 1px 2.5px rgba(15, 102, 241, 0.5);
}

#c0:checked~.header .c0::before,
#c0:checked+#c1:checked~.header .options .c1::before,
#c0:checked~#c2:checked~.header .options .c2::before,
#c0:checked~#c3:checked~.header .options .c3::before,
#c0:checked~#c4:checked~.header .options .c4::before {
  content: '\1f534';
  box-shadow: 0px 1.5px 1px 2.5px rgba(241, 102, 15, 0.5);
}

#c1:checked+#c2:checked+#c3:checked+#c4:checked+.header .c0::after {
  content: ' Selected';
  color: rgba(15, 102, 241, 1);
  text-shadow: 1.5px 2px 1.75px rgba(15, 102, 241, 0.7);
}

#c0:checked+#c1:checked+#c2:checked+#c3:checked+#c4:checked+.header.header .c0::after {
  content: ' Selected';
  color: rgba(241, 102, 15, 1);
  text-shadow: 1.5px 2px 1.75px rgba(241, 102, 15, 0.7);
}

#c1:not(:checked)~.header .c0::after,
#c2:not(:checked)~.header .c0::after,
#c3:not(:checked)~.header .c0::after,
#c4:not(:checked)~.header .c0::after {
  content: '';
}

#c1:not(:checked)~.header .c0::before,
#c2:not(:checked)~.header .c0::before,
#c3:not(:checked)~.header .c0::before,
#c4:not(:checked)~.header .c0::before {
  content: '\1f518';
  box-shadow: 0px 1.5px 1px 2.5px rgba(51, 51, 51, 0.3);
}

.header {
  border: 3px inset rgba(51, 51, 51, 0.51);
  border-radius: 5px;
  -webkit-padding-before: 0.0em;
  -webkit-padding-start: 0.15em;
  -webkit-padding-end: 0.15em;
  -webkit-padding-after: 0.15em;
  box-shadow: 0px 1.5px 1px 2.5px rgba(51, 51, 51, 0.3);
  width: 380px;
}

legend {
  height: 35px
}

legend h3 {
  font-size: 1.55rem;
  line-height: 2;
  transform: translateY(-35px);
}

.options {
  background: rgba(3, 9, 27, 0.1);
  border: 3px inset rgba(51, 51, 51, 0.15);
  border-radius: 5px;
  box-shadow: 0px -2px -1px 0px rgba(51, 51, 51, 0.15);
}

summary {
  padding: 3px 5px;
  font-size: 1.2rem;
  cursor: pointer;
}

FileWatcherClass：

<form id='card'>

  <input type="checkbox" class="chx" id="c0" />
  <input type="checkbox" class="chx" id='c1' />
  <input type="checkbox" class="chx" id='c2' />
  <input type="checkbox" class="chx" id='c3' />
  <input type="checkbox" class="chx" id='c4' />

  <fieldset class='header' name="header">
    <legend>
      <h3>List of Checkboxes</h3>
    </legend>
    <label for='c0' class='c0 lab'> All Options</label>

    <details class="options">
      <summary>Select Options</summary>
      <label for='c1' class='c1 lab'> One </label>
      <label for='c2' class='c2 lab'> Two </label>
      <label for='c3' class='c3 lab'> Three </label>
      <label for='c4' class='c4 lab'> Four </label>
    </details>

  </fieldset>

</form>