class ReadExcelToTree
{
public ReadExcelToTree()
{
}
/**//// <summary>
/// 读取Excel文件,内容存储在DataSet中
/// </summary>
/// <param name="opnFileName">Excel文件路径</param>
/// <returns>DataSet</returns>
public static DataSet ExcelToDataSet(string FileName)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + FileName + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"";
OleDbConnection conn = new OleDbConnection(strConn);
string strExcel ="select * from [sheet1$]";
OleDbDataAdapter XlsCommand = null;
DataSet ds = new DataSet();
try
{
conn.Open();
XlsCommand = new OleDbDataAdapter(strExcel, strConn);
XlsCommand.Fill(ds, "sheet1");
}
catch (Exception ex)
{
Console.WriteLine("错误!:" + ex.Message.ToString());
}
finally
{
conn.Close();
conn.Dispose();
}
return ds;
}
}主程序中调用：
DataSet ds = ReadExcelToTree.ExcelToDataSet(@"CC08Help.xls");
生成树：
1 private void InitTreeView(DataTable dt, TreeView tv)
2 {
3 TreeNode curNodeLevel0 = null, curNodeLevel1 = null, curNodeLevel2 = null,
4 curNodeLevel3 = null, curNodeLevel4 = null, curNodeLevel5 = null,
5 curNodeLevel6 = null, curNodeLevel7 = null;
6
7 //对第一层节点初始化.
8 //就是Excel的 A1 单元格 我们定义该层节点为0层节点
9 curNodeLevel0 = new TreeNode("联机帮助");
10
11 for (int i = 0; i < dt.Rows.Count; i++)
12 {
13 DataRow dr = dt.Rows[i];
14
15 // 如果dr[1]不为空,则说明这是一个新的一层节点.该层节点为 1 层
16 if (dr[1].ToString() != string.Empty)
17 {
18 //创建一个节点.
19 TreeNode t = new TreeNode(dr[1].ToString());
20
21 //将该节点放到0层节点的子节点上,即一层节点
22 curNodeLevel0.Nodes.Add(t);
23
24 //设置当前的一层节点为刚刚生成的节点.
25 curNodeLevel1 = t;
26 //开始处理下一行.
27 continue;
28 }
29
30
31 // 如果循环走到这儿,则说明dr[1].ToString() == String.Empty;
32 if (dr[2].ToString() != String.Empty)
33 {
34 TreeNode t = new TreeNode(dr[2].ToString());
35 curNodeLevel1.Nodes.Add(t);
36 curNodeLevel2 = t;
37 continue;
38 }
39
40 if (dr[3].ToString() != string.Empty)
41 {
42 TreeNode t = new TreeNode(dr[3].ToString());
43 curNodeLevel2.Nodes.Add(t);
44 curNodeLevel3 = t;
45 continue;
46 }
47
48 if (dr[4].ToString() != string.Empty)
49 {
50 TreeNode t = new TreeNode(dr[4].ToString());
51 curNodeLevel3.Nodes.Add(t);
52 curNodeLevel4 = t;
53 continue;
54 }
55 if (dr[5].ToString() != string.Empty)
56 {
57 TreeNode t = new TreeNode(dr[5].ToString());
58 curNodeLevel4.Nodes.Add(t);
59 curNodeLevel5 = t;
60 continue;
61 }
62 if (dr[6].ToString() != string.Empty)
63 {
64 TreeNode t = new TreeNode(dr[6].ToString());
65 curNodeLevel5.Nodes.Add(t);
66 curNodeLevel6 = t;
67 continue;
68 }
69 if (dr[7].ToString() != string.Empty)
70 {
71 TreeNode t = new TreeNode(dr[7].ToString());
72 curNodeLevel6.Nodes.Add(t);
73 curNodeLevel7 = t;
74 continue;
75 }
76 }
77
78 tv.Nodes.Add(curNodeLevel1);
79 tv.CollapseAll();
80 }
程序中调用：
private void Help_Load(object sender, EventArgs e)
{
this.tvHelp.ImageList = this.imgLHelp;
DataSet ds = ReadExcelToTree.ExcelToDataSet(@"CC08Help.xls");
if (ds != null)
{
InitTreeView(ds.Tables[0], this.tvHelp);
}
foreach (TreeNode tn in tvHelp.Nodes)
{
SetLeafNodeImageIndex(tn);
}
this.webBrowser1.Url = new Uri(GetTNHtmlName(new TreeNode("(命令联机帮助)")));
}
private void TVHelp_MouseClick(object sender, MouseEventArgs e)
{
TreeNode selTreenode = tvHelp.GetNodeAt(e.Location); //注意不要用tvHelp.selected
if (e.Button == MouseButtons.Left)
{
if (selTreenode != null
&& selTreenode.Nodes.Count == 0)//代表此节点是叶节点
{
this.webBrowser1.Url = new Uri(GetTNHtmlName(selTreenode)) ;
}
}
}
1
2 //设置叶子节点的图标
3 private void SetLeafNodeImageIndex(TreeNode tn)
4 {
5 if (tn.Nodes.Count == 0)
6 {
7 tn.ImageIndex = 1;
8 return;
9 }
10 else
11 {
12 tn.ImageIndex = 0;
13 }
14 foreach (TreeNode childNode in tn.Nodes)
15 {
16 SetLeafNodeImageIndex(childNode);
17 }
18 }
1 private string GetTNHtmlName(TreeNode tn)
2 {
3 int startIndex = tn.Text.LastIndexOf('(');
4 int startIndex1 = tn.Text.LastIndexOf('（'); ;
5 int endIndex = tn.Text.LastIndexOf(')');
6 int endIndex1 = tn.Text.LastIndexOf('）');
7
8 if(startIndex1 > startIndex)
9 {
10 startIndex = startIndex1;
11 }
12 if (endIndex1 > endIndex)
13 {
14 endIndex = endIndex1;
15 }
16
17 if (startIndex < 0 || endIndex < 0)
18 {
19 return "res://" + System.Environment.SystemDirectory + @"\system32\shdoclc.dll/http_404.htm";
20 }
21
22 string url = "file://" + Application.StartupPath + "/document/" + tn.Text.Substring(startIndex + 1, endIndex - startIndex - 1) + ".htm";
23 return url;
24 }
生成树节点的简化代码——改版！
private void InitTreeView(DataTable dt, TreeView tv)
{
int colums = dt.Columns.Count;
TreeNode[] curNodeLevel = new TreeNode[colums];
//对第一层节点初始化.
//就是Excel的 A1 单元格 我们定义该层节点为0层节点
for (int i = 0; i < dt.Rows.Count; i++)
{
DataRow dr = dt.Rows[i];
for (int j = 1; j <= colums; j++)
{
if (j == 1 && dr[j].ToString()!=String.Empty)
{
TreeNode t = new TreeNode(dr[j].ToString());
curNodeLevel[0] = t;
break;
}
else if(j >= 2)
{
if (dr[j].ToString() != string.Empty)
{
TreeNode t = new TreeNode(dr[j].ToString());
curNodeLevel[j - 2].Nodes.Add(t);
curNodeLevel[j - 1] = t;
break;
}
}
}
}
tv.Nodes.Add(curNodeLevel[0]);
tv.Nodes[0].Expand();
}
posted on 2008-09-19 20:25
天书 阅读(1000)
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