如何获取 ListBox 中项目的索引?

How Can I Get the Index of An Item in a ListBox?(如何获取 ListBox 中项目的索引?)

问题描述

我正在向 ListBox 添加项目，如下所示:

I am adding items to a ListBox like so:

myListBox.Items.addRange(myObjectArray);

我还想通过以下方式选择我添加的一些项目:

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 总是 -1.

有没有其他方法可以在 ListBox 中获取对象的索引?

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

推荐答案

你应该确保 MyObject 覆盖 Equals(), GetHashCode() 和 ToString() 以便 IndexOf() 方法可以正确找到对象.

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() 对于相等性测试不需要被覆盖，但它对于调试很有用.

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

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