关闭WinForm时将触发Combox SelectedIndexChanged [英] Combox SelectedIndexChanged fires when close the WinForm

问题描述

我正在使用Combobox SelectedIndexChanged事件执行一些任务.运行良好.但是，当我关闭窗体时，SelectedIndexChanged被解雇，并且出现对象引用未设置为对象的实例".例外.我的代码如下-

I am using Combobox SelectedIndexChanged event to perform few tasks. It is working nice. But when i am closing the form, SelectedIndexChanged gets fired and i get "Object reference not set to an instance of an object." exception. My code is following-

private void cmbProductName_SelectedIndexChanged(object sender, EventArgs e)
  {
      try
      {
          Product p =(Product) cmbProductName.SelectedItem;

          RawItems = RawItem.GetEntityList(p.Id, ConnectionString);

      }
      catch (Exception ex)
      {
          CustomMessageBox.ShowSystemException(ex);
      }
  }

如何避免在窗体关闭时引发SelectedIndexChanged事件?

谢谢
SKPaul.

How to avoid the SelectedIndexChanged event being fired when form is closing?

Thanks
SKPaul.

推荐答案

与表单关闭事件中与cmbProductName相关的任何设置吗?否则可能会在Combo中出现焦点.

anything your setting related to cmbProductName in Form Closing event? or may be focus will be there in Combo.

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