如何获取列表框中项目的索引? [英] How Can I Get the Index of An Item in a ListBox?

问题描述

我正在像这样向ListBox添加项目:

I am adding items to a ListBox like so:

myListBox.Items.addRange(myObjectArray);

，我还想通过以下方法选择添加的一些项目:

and I also want to select some of the items I add by the following:

foreach(MyObject m in otherListOfMyObjects) 
{
    int index = myListBox.Items.IndexOf(m);
    myListBox.SelectedIndices.Add(index);
}

但是index始终是-1.

是否有其他方法可以获取ListBox中的对象的索引?

Is there a different way to get the index of an object in a ListBox?

推荐答案

您应确保MyObject覆盖Equals()，GetHashCode()和ToString()，以便IndexOf()方法可以正确找到该对象.

You should make sure that MyObject overrides Equals(), GetHashCode() and ToString() so that the IndexOf() method can find the object properly.

从技术上讲，ToString()不需要覆盖相等性测试，但对于调试很有用.

Technically, ToString() doesn't need to be overridden for equality testing, but it is useful for debugging.

这篇关于如何获取列表框中项目的索引?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！