本文介绍了Treelistview在用户控制中不可见的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我设计了Treelistview，但没有出现在用户控制中 我尝试过：
I have designed Treelistview ,but not appearing in user control What I have tried:
private void InitializeData() { SqlDataAdapter adp = new SqlDataAdapter("select acdesc,acno,speactype,acremarks from chartaccount where ParentAcNo is null order by AcNo", cn); DataTable dt = new DataTable(); adp.Fill(dt); foreach (DataRow dataRow in dt.Rows) { Node parent = new Node(dataRow["acdesc"].ToString(), dataRow["acno"].ToString(), dataRow["speactype"].ToString(), dataRow["acremarks"].ToString()); string acno = dataRow["acno"].ToString(); if (acno != "" && acno != null) { SqlDataAdapter adp1 = new SqlDataAdapter("select acdesc,acno,speactype,acremarks from chartaccount where ParentAcNo ='" + acno + "'", cn); DataTable dt1 = new DataTable(); adp1.Fill(dt1); foreach (DataRow dataRow1 in dt1.Rows) { parent.Children.Add(new Node(dataRow1["acdesc"].ToString(), dataRow1["acno"].ToString(), dataRow1["speactype"].ToString(), dataRow1["acremarks"].ToString())); } } data.Add(parent); } //foreach (ListViewItem item in treeListView.Items) //{ // item.BackColor = Color.AntiqueWhite; //} for (int i = 0; i < treeListView.Items.Count; i++) { treeListView.Items[i].BackColor = Color.YellowGreen; //for (int j = 0; j < listView2.Items[i].SubItems.Count; j++) //{ // listView2.Items[i].SubItems[j].BackColor = Color.Black; ; //} } }推荐答案
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="TreeViewControl.ascx.cs" Inherits="TreeViewControl" %> <asp:TreeView ID="TreeView1" runat="server" ImageSet="XPFileExplorer" NodeIndent="15"> <HoverNodeStyle Font-Underline="True" ForeColor="#6666AA" /> <NodeStyle Font-Names="Tahoma" Font-Size="8pt" ForeColor="Black" HorizontalPadding="2px" NodeSpacing="0px" VerticalPadding="2px"></NodeStyle> <ParentNodeStyle Font-Bold="False" /> <SelectedNodeStyle BackColor="#B5B5B5" Font-Underline="False" HorizontalPadding="0px" VerticalPadding="0px" /> </asp:TreeView>
树控代码文件：
Tree Control Code File:
public partial class TreeViewControl : System.Web.UI.UserControl { protected void Page_Load(object sender, EventArgs e) { if (!this.IsPostBack) { DataTable dt = this.GetData("SELECT Id, Name FROM VehicleTypes"); this.PopulateTreeView(dt, 0, null); } } private void PopulateTreeView(DataTable dtParent, int parentId, TreeNode treeNode) { foreach (DataRow row in dtParent.Rows) { TreeNode child = new TreeNode { Text = row["Name"].ToString(), Value = row["Id"].ToString() }; if (parentId == 0) { TreeView1.Nodes.Add(child); DataTable dtChild = this.GetData("SELECT Id, Name FROM VehicleSubTypes WHERE VehicleTypeId = " + child.Value); PopulateTreeView(dtChild, int.Parse(child.Value), child); } else { treeNode.ChildNodes.Add(child); } } } private DataTable GetData(string query) { DataTable dt = new DataTable(); string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString; using (SqlConnection con = new SqlConnection(constr)) { using (SqlCommand cmd = new SqlCommand(query)) { using (SqlDataAdapter sda = new SqlDataAdapter()) { cmd.CommandType = CommandType.Text; cmd.Connection = con; sda.SelectCommand = cmd; sda.Fill(dt); } } return dt; } } }我们要使用UserControl的父页面：
Parent Page where we want to use the UserControl:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CS.aspx.cs" Inherits="CS" %> <%@ Register TagPrefix="My" TagName="UserInfoBoxControl" Src="~/TreeViewControl.ascx" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "www.w3/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="www.w3/1999/xhtml"> <head runat="server"> <title></title> <style type="text/css"> body { font-family: Arial; font-size: 10pt; } </style> </head> <body> <form id="form1" runat="server"> <h3> Vehicle Details</h3> <hr /> <My:UserInfoBoxControl runat="server" ID="MyUserInfoBoxControl" /> </form> </body> </html>
更多推荐
Treelistview在用户控制中不可见
发布评论