树视图搜索

Question

此功能只找到在树状第一节点，包含SEARCHTEXT。

private TreeNode SearchNode(string SearchText,TreeNode StartNode) 
    { 
     TreeNode node=null; 
     while (StartNode!= null) 
     { 
      if (StartNode.Text.ToLower().Contains(SearchText.ToLower())) 
      { 
       node = StartNode; 
       break; 
      }; 
      if (StartNode.Nodes.Count != 0) 
      { 
       node=SearchNode(SearchText, StartNode.Nodes[0]);//Recursive Search 
       if (node != null) 
       { 
        break; 
       }; 
      }; 
      StartNode = StartNode.NextNode; 
     }; 
     return node; 
    } 


    private void button1_Click(object sender, EventArgs e) 
    { 
     string SearchText = this.textBox1.Text; 
     if (SearchText == "") 
     { 
      return; 
     }; 
     TreeNode SelectedNode = SearchNode(SearchText, treeView1.Nodes[0]); 
     if (SelectedNode != null) 
     { 
      this.treeView1.SelectedNode = SelectedNode; 
      this.treeView1.SelectedNode.Expand(); 
      this.treeView1.Select(); 
     }; 
    } 

我应该如何改变它，这样的功能将能够找到不仅是第一个节点，但所有这些，每次当我点击按钮1，它会寻找下一个节点，直到结束，然后它从一开始就开始。所以我不应该从TreeView1.Nodes [0]，而是从TreeView1.SelectedNode搜索...

Answer 1

像下面要细要添加到您的窗体的代码。

private List<TreeNode> CurrentNodeMatches = new List<TreeNode>(); 

    private int LastNodeIndex = 0; 

    private string LastSearchText; 


    private void button1_Click(object sender, EventArgs e) 
    { 


     string searchText = this.textBox1.Text; 
     if (String.IsNullOrEmpty(searchText)) 
     { 
      return; 
     }; 


     if (LastSearchText != searchText) 
     { 
      //It's a new Search 
      CurrentNodeMatches.Clear(); 
      LastSearchText = searchText; 
      LastNodeIndex = 0; 
      SearchNodes(searchText, treeView1.Nodes[0]); 
     } 

     if (LastNodeIndex >= 0 && CurrentNodeMatches.Count > 0 && LastNodeIndex < CurrentNodeMatches.Count) 
     { 
      TreeNode selectedNode = CurrentNodeMatches[LastNodeIndex]; 
      LastNodeIndex++; 
      this.treeView1.SelectedNode = selectedNode; 
      this.treeView1.SelectedNode.Expand(); 
      this.treeView1.Select(); 

     } 
    } 

    private void SearchNodes(string SearchText, TreeNode StartNode) 
    { 
     TreeNode node = null; 
     while (StartNode != null) 
     { 
      if (StartNode.Text.ToLower().Contains(SearchText.ToLower())) 
      { 
       CurrentNodeMatches.Add(StartNode); 
      }; 
      if (StartNode.Nodes.Count != 0) 
      { 
       SearchNodes(SearchText, StartNode.Nodes[0]);//Recursive Search 
      }; 
      StartNode = StartNode.NextNode; 
     }; 

    } 

有两个部分，

1. 收集所有的节点进入通过List<TreeNode>一个List<TreeNode>

2. 页如果搜索没有改变。如果搜索已更改，请清除列表并重置索引。

我在.NET 4下运行Windows窗体测试这一点 - 它通过网页中包含搜索文本，1 1直到它到达最后一个节点一个TreeView的每个节点。使用这种解决方案搜索

Answer 2

您需要创建一个节点集合（如List）并将每个找到的节点添加到该列表中，并返回该节点而不是单个节点。此外，你必须删除所有break语句

Answer 3

一载树节点

int currentSearch = 0; 
int loop = 0; 
int found = 0; 

private bool FilterTreeNode(TreeNodeCollection nodes, string keyword) 
{ 
    bool result = false; 
    for (int i = 0; i < nodes.Count; i++) 
    { 
     if(result) 
      break; 
     loop++; 
     if (currentSearch < loop) 
     { 
      currentSearch++; 
      if (nodes[i].Text.Contains(keyword)) 
      { 
       found++; 
       _treeView.SelectedNode = nodes[i]; 
       _treeView.SelectedNode.Expand(); 
       _treeView.SelectedNode.EnsureVisible(); 
       OnFindResult(string.Format("Current result: {0} on total {1} nodes. FilePath: {2}", 
            found, _treeView.GetNodeCount(true), nodes[i].Name)); 
       return true; 
      } 
     } 
     result = FilterTreeNode(nodes[i].Nodes, keyword); 
    } 

    return result; 
}