129 lines
3.6 KiB
C#
129 lines
3.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Web;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Data;
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using System.Text;
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namespace FineUI.Examples.tree.databind
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{
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public partial class tree_datatable : PageBase
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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if (!IsPostBack)
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{
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LoadData();
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}
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}
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private void LoadData()
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{
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// 模拟从数据库返回数据表
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DataTable table = CreateDataTable();
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DataSet ds = new DataSet();
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ds.Tables.Add(table);
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ds.Relations.Add("TreeRelation", ds.Tables[0].Columns["Id"], ds.Tables[0].Columns["ParentId"]);
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foreach (DataRow row in ds.Tables[0].Rows)
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{
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if (row.IsNull("ParentId"))
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{
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TreeNode node = new TreeNode();
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node.Text = row["Text"].ToString();
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node.Expanded = true;
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Tree1.Nodes.Add(node);
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ResolveSubTree(row, node);
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}
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}
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}
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private void ResolveSubTree(DataRow dataRow, TreeNode treeNode)
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{
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DataRow[] rows = dataRow.GetChildRows("TreeRelation");
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if (rows.Length > 0)
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{
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treeNode.Expanded = true;
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foreach (DataRow row in rows)
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{
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TreeNode node = new TreeNode();
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node.Text = row["Text"].ToString();
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treeNode.Nodes.Add(node);
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ResolveSubTree(row, node);
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}
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}
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}
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#region CreateDataTable
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private DataTable CreateDataTable()
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{
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DataTable table = new DataTable();
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DataColumn column1 = new DataColumn("Id", typeof(string));
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DataColumn column2 = new DataColumn("Text", typeof(String));
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DataColumn column3 = new DataColumn("ParentId", typeof(string));
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table.Columns.Add(column1);
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table.Columns.Add(column2);
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table.Columns.Add(column3);
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DataRow row = table.NewRow();
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row[0] = "china";
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row[1] = "中国";
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row[2] = DBNull.Value;
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table.Rows.Add(row);
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row = table.NewRow();
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row[0] = "henan";
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row[1] = "河南省";
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row[2] = "china";
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table.Rows.Add(row);
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row = table.NewRow();
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row[0] = "zhumadian";
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row[1] = "驻马店市";
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row[2] = "henan";
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table.Rows.Add(row);
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row = table.NewRow();
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row[0] = "luohe";
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row[1] = "漯河市";
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row[2] = "henan";
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table.Rows.Add(row);
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row = table.NewRow();
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row[0] = "anhui";
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row[1] = "安徽省";
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row[2] = "china";
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table.Rows.Add(row);
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row = table.NewRow();
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row[0] = "hefei";
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row[1] = "合肥市";
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row[2] = "anhui";
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table.Rows.Add(row);
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row = table.NewRow();
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row[0] = "golden";
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row[1] = "金色池塘小区";
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row[2] = "hefei";
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table.Rows.Add(row);
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row = table.NewRow();
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row[0] = "ustc";
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row[1] = "中国科学技术大学";
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row[2] = "hefei";
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table.Rows.Add(row);
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return table;
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}
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#endregion
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}
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}
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