c# - objectlistview 如何更改组标题中的文本？

Question

我想更改组标题的名称，但我无法在文档或谷歌上找到任何解决方案。

标题中的文本应该是在组中汇总的时间。

它应该是这样的:

Answer 1

the text in the header should be a time which is summed up in the group.

没问题:)

olv.AboutToCreateGroups += delegate(object sender, CreateGroupsEventArgs args) {
    foreach (OLVGroup olvGroup in args.Groups) {
        int totalTime = 0;

        foreach (OLVListItem item in olvGroup.Items) {
            // change this block accordingly
             MyRowObjectType rowObject = item.RowObject as MyRowObjectType;
             totalTime += rowObject.MyNumericProperty;
            // change this block accordingly
        }

        olvGroup.Header += String.Format(" (Total time = {0})", totalTime);
    }
};