如何在树视图中添加ID [英] How to add ID in a tree view

问题描述

大家好，我对树视图控件有疑问。我是C＃的新手，并坚持如何将ID添加到相应的树节点。我不确定这行代码是否包含ID，如果没有，那么我应该包括什么。我想获取所选节点的ID。我如何继续请告诉我。我的代码如下 -



提前致谢。

  private   void  PopulateTreeView（）
 {
 treeDepartments.Nodes.Clear（）; 
 
 字符串 strConn =   Server = server; Database = DB; Integrated Security = True;; 
 SqlConnection conn =  new  SqlConnection（strConn）; 
 SqlDataAdapter da =  new  SqlDataAdapter（ 选择*来自tSubDepartments，conn）; 
 SqlDataAdapter daCategories =  new  SqlDataAdapter（ 选择*来自tDepartments，conn）; 
 da.Fill（ds，  tSubDepartments）; 
 daCategories.Fill（ds，  tDepartments）; 
 
 ds.Relations.Add（  Dept_SubDept，ds.Tables [   tDepartments]。列[  dpCode]，ds.Tables [  tSubDepartments].Columns [  dpCode]）; 
  foreach （DataRow dr  in  ds.Tables [  tDepartments]。行）
 {
  int  id = Convert.ToInt32（dr [  dpCode]）; 
 TreeNode tn =  new  TreeNode（dr [  dpName]的ToString（））; 
  foreach （DataRow drChild  in  dr.GetChildRows（  Dept_SubDept））
 {
 
 tn.Nodes.Add（drChild [  sdName]。ToString（））; 
 
} 
 
 treeDepartments.Nodes.Add（tn）; 
 
} 
} 

解决方案

我倾向于将DataRow放在Tag属性中以供日后使用访问。

Hi guys, i am having a problem regarding a tree view control. I am very new to C# and stuck on how to add ID to the corresponding tree nodes. I am not sure whether this lines of code holds ID or if not then what should i include. I want to get the ID of the selected node. How do i proceed please let me know. My code is given below -

Thanks in advance.

private void PopulateTreeView()
        {
            treeDepartments.Nodes.Clear();

            String strConn = "Server =server;Database =DB;Integrated Security = True;";
            SqlConnection conn = new SqlConnection(strConn);
            SqlDataAdapter da = new SqlDataAdapter("Select * from tSubDepartments", conn);
            SqlDataAdapter daCategories = new SqlDataAdapter("Select * from tDepartments", conn);
            da.Fill(ds, "tSubDepartments");
            daCategories.Fill(ds, "tDepartments");

            ds.Relations.Add("Dept_SubDept", ds.Tables["tDepartments"].Columns["dpCode"], ds.Tables["tSubDepartments"].Columns["dpCode"]);
            foreach (DataRow dr in ds.Tables["tDepartments"].Rows)
            {
                int id = Convert.ToInt32(dr["dpCode"]);
                TreeNode tn = new TreeNode(dr["dpName"].ToString());
                foreach (DataRow drChild in dr.GetChildRows("Dept_SubDept"))
                {
       
                    tn.Nodes.Add(drChild["sdName"].ToString());
                    
                }
                
                treeDepartments.Nodes.Add(tn);
                
            }
        }

解决方案

I tend to put the DataRow in the Tag property for later access.

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