Checklistbox问题在消息框中显示选择(Checklistbox issue displaying selection in message box)

我有一个问题，让checkedlistbox显示Windows应用程序的消息框中的所有选择。我只选择了最后一个显示。例如，我选择“一，三和五”，只有五个显示。

这是我的代码：

string display = ""; foreach (object selectedItems in clb.CheckedItems) { if (clb.SelectedItems.Count != 0) { display = "Items needed\n-----------\n\n\n" + selectedItems.ToString(); } else { display = "No items selected"; } } MessageBox.Show(display, "Title");

任何想法指出我正确的方向来实现这一点是值得赞赏的。

I am having an issue getting the checkedlistbox to display all selections in a message box for a windows application. I am only getting the last one selected to display. For example, I select "one, three, and five", only five displays.

Here is my code:

string display = ""; foreach (object selectedItems in clb.CheckedItems) { if (clb.SelectedItems.Count != 0) { display = "Items needed\n-----------\n\n\n" + selectedItems.ToString(); } else { display = "No items selected"; } } MessageBox.Show(display, "Title");

Any ideas to point me in the right direction to accomplish this is appreciated.

最满意答案

您的错误是在选择/检查项目数测试之前开始的循环中。您的循环继续在每个循环中更改变量显示的值。最后，变量仅包含最后检查/选择的项目。

所以，我假设您要显示checkitems，而不是selecteditems。在任何情况下，您都需要遍历集合（在本例中为ChekedItems）并在stringbuilder中累积要显示的项目文本。

string display = ""; // Every item in this collection is an item // with CheckState = Checked or Indeterminate if (clb.CheckedItems.Count != 0) { StringBuilder sb = new StringBuilder(); foreach(string item in clb.CheckedItems) sb.AppendLine(item); display = "Items needed\n-----------\n\n\n" + sb.ToString(); } else { display = "No items checked"; } MessageBox.Show(display, "Title");

如果你真的想在选择项上循环，代码是相同的，但只需使用SelectedItems集合

Your error is in the loop that starts before the test of the number of items selected/checked. Your loop continues changing the value of the variable display at each loop. At the end the variable contains only the last item checked/selectd.

So, I assume that you want to display the checkeditems, not the selecteditems. In any case you need to loop over the collection (ChekedItems in this case) and accumulate in a stringbuilder the item texts that you want to display.

string display = ""; // Every item in this collection is an item // with CheckState = Checked or Indeterminate if (clb.CheckedItems.Count != 0) { StringBuilder sb = new StringBuilder(); foreach(string item in clb.CheckedItems) sb.AppendLine(item); display = "Items needed\n-----------\n\n\n" + sb.ToString(); } else { display = "No items checked"; } MessageBox.Show(display, "Title");

If you really want to loop on the selecteditems, the code is the same, but just use the SelectedItems collection

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