上/下功能在listcontrol中不起作用 [英] Up/down functionality not working in listcontrol

问题描述

我的列表中有一些项目（动态数据）

当我在列表中选择一个项目并点击向上时。按钮正确地向上移动（fisrt time click）但是如果再次点击向上按钮则会恢复更改（我的意思是如果再点击一次按钮就不会发生它正在发生的恢复）

你能不能帮我这里



我尝试过的事情：

i have some items in my list(dynamic data)
when i selected an item in the list and clicked on 'up'. button its wmoving up correctly(fisrt time clicking)but if click up button again then it is reverting changes( i mean if click one more time up button it not happening up its happening reverting)
could you please help me here

What I have tried:

int item2 = m_clistctrl.GetNextItem(-1, LVNI_SELECTED);// i think problem is in this line because its always considering selected one is intially selected thing
int columns = m_clistctrl.GetHeaderCtrl()->GetItemCount();

for (int i = 1; i < columns; i++)
{
  CString str1 = m_clistctrl.GetItemText(item2 - 1, i);
  CString str2 = m_clistctrl.GetItemText(item2, i);
  
  m_clistctrl.SetItemText(item2 - 1, i, str2);
  m_clistctrl.SetItemText(item2, i, str1);
}

首先点击它的工作正常但是如果我再次点击它不会上升它的下来

可以请告诉我在这段代码中有什么问题

for first clicking its working fine but if i click it again its not going up its coming down
could please tell me anything wrong in this code

推荐答案

您还必须更改选择，因为在交换内容后，仍然会选择较低的项目。



在处理程序的末尾添加：

You have to change also the selection because after exchanging the content the lower item is still selected.

Add this at the end of your handler:

// Unselect item2 (the lower one)
m_clistctrl.SetItemState(item2, ~LVIS_SELECTED, LVIS_SELECTED);
// Select the upper item
m_clistctrl.SetItemState(item2 - 1, LVIS_SELECTED, LVIS_SELECTED);
// This is only necessary if there are multiple items selected
m_clistctrl.SetSelectionMark(item2 - 1);

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