Question

我正在尝试使用复合滤镜（即多个滤镜条件）过滤对象列表视图，但默认的高亮文本渲染器仅渲染第一个滤镜的文本。

有没有办法让它适用于所有过滤器，或者更好的是为每个过滤器使用多个文本渲染器？

我正在使用控制字符（＆amp;＆amp;和||）来分隔搜索字词

一些C＆amp; P代码来说明

public void Filter (string txt, MatchKind matchKind) {
     bool filterByAll;
     IEnumerable<string> terms = SplitSearchTerms(txt, out filterByAll);
     List<IModelFilter> modelFilters = new List<IModelFilter>();
     foreach (string term in terms) {
        IModelFilter filter;
        switch (matchKind) {
              case MatchKind.Contains:
              default:
                 filter = TextMatchFilter.Contains(_olv, term);
                 break;
              case MatchKind.Prefix:
                 filter = TextMatchFilter.Prefix(_olv, term);
                 break;
              case MatchKind.Regex:
                 filter = TextMatchFilter.Regex(_olv, term);
                 break;
           }
        modelFilters.Add(filter);
     }

     CompositeFilter compositeFilter;
     if (filterByAll) {
        compositeFilter = new CompositeAllFilter(modelFilters);
     } else {
        compositeFilter = new CompositeAnyFilter(modelFilters);
     }
     //Only highlights text from the first filter
     HighlightTextRenderer renderer = _olv.DefaultRenderer as HighlightTextRenderer;
     if (renderer != null) {
        SolidBrush brush = renderer.FillBrush as SolidBrush ?? new SolidBrush(Color.Transparent);
        if (brush.Color != Color.LightSeaGreen) {
           brush.Color = Color.LightSeaGreen;
           renderer.FillBrush = brush;
           _olv.DefaultRenderer = renderer;
        }
     } else {
        MessageBox.Show(@"Renderer is null!");
     }
     _olv.ModelFilter = compositeFilter;
  }

Answer 1

此解决方案适合我。多列支持仍支持突出显示。

var filters = new List<IModelFilter>();
TextMatchFilter highlightingFilter = null;
if (!String.IsNullOrEmpty(txtSearch.Text))
{
    var words = txtSearch.Text.Trim().Split(null);
    highlightingFilter = TextMatchFilter.Contains(ListView, words);
    foreach (var word in words)
    {
        var filter = TextMatchFilter.Contains(ListView, word);
        filters.Add(filter);
    }
}
var compositeFilter = new CompositeAllFilter(filters);

ListView.ModelFilter = highlightingFilter;
ListView.AdditionalFilter = compositeFilter;
ListView.DefaultRenderer = new HighlightTextRenderer(highlightingFilter);

对象列表视图使用复合滤镜突出显示渲染器

1 个答案: