通过列表框的索引强制选择或取消相同的值(Force selection by index of listbox or take apart same values)

 我使用文本框和按钮将项目添加到列表框： 
 
if (tbName.Text != "")
{
     listBox.Items.Add(tbName.Text);
     //Let user add another new items
     tbName.Text = "";
}
 
 并尝试选择执行某些操作的项目（因为我编辑它）。 
 
 但问题是用户可以添加相同的项目值，而当我尝试选择其中一个项目时，会导致失败。 它会自动选择两个相同名称的项目，操作不正确。 
 
 
 我可以使用某种方法强制列表框按索引选择项目（因为索引不应该相同）？ 或者我如何通过编程分割相同的项目值（它不会选择相同的项目，只是选择我点击的内容，这是否意味着我应该通过选择项目拦截MouseDown或SelectChanged的事件参考鼠标点击的位置，像线的高度是18px，所以如果我点击的位置在18~36px之间，那么选择项的索引应该是1，0是0~18px）？ 
 
 我的listBox是： 
 
<ListBox Height="248" HorizontalAlignment="Left" Margin="141,223,0,0" Name="listBox" VerticalAlignment="Top" Width="378" />

I use textbox and button to add items to listbox:
 
if (tbName.Text != "")
{
     listBox.Items.Add(tbName.Text);
     //Let user add another new items
     tbName.Text = "";
}
 
And try to select items doing something (as I edit it).
 
But the trouble is the user can add same value of item, and while I try to select one of the item, it will result in failure. It will auto-select two items by same name, and the operation will be improper.
 
 
Can I use some method to force the listbox select items by index( since the index shouldn't be same)? Or how can I take apart the same value of items by programming(it won't select same item but just select what I click, is it means I should intercept the event of MouseDown or SelectChanged by select items refer to the position of mouse click, like height of the line is 18px, so if the position I click is between 18~36px, then the index of select item should be 1, and 0 is 0~18px)?
 
My listBox is:
 
<ListBox Height="248" HorizontalAlignment="Left" Margin="141,223,0,0" Name="listBox" VerticalAlignment="Top" Width="378" />

原文：https://stackoverflow.com/questions/19680996