怎样判断下treeview有没有子节点

wylp_19 2009-05-29 08:08:25

public void InitTree(TreeNodeCollection Nds, string parent_id)
{
TreeNode node;
DataRow[] rows = ds.Tables[0].Select("parent_id = '" + parent_id + "'");

foreach (DataRow row in rows)
{
node = new TreeNode(row["powername"].ToString(), row["parent_id"].ToString());
Nds.Add(node);

InitTree(node.ChildNodes, row["power_id"].ToString());
}
}

我要找出父节点不对其设置URL 请问下我的这段代码改如何修改

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kevinhu520 2009-05-31

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treeView1.SelectedNode.Nodes == null || treeView1.SelectedNode.Nodes.Count <= 0

bieqing 2009-05-30

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学习了

rain_GJ 2009-05-30

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学习下

忧伤的蜗牛 2009-05-30

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新手学习中。。。。。

wuyq11 2009-05-29

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public void InitTree(TreeNode Nds, string parent_id)
{
TreeNode node;
DataRow[] rows = ds.Tables[0].Select("parent_id = '" + parent_id + "'");
foreach (DataRow row in rows)
{
node = new TreeNode(row["powername"].ToString(), row["parent_id"].ToString());
Nds.ChildNodes.Add(node);
if(node.Parent!=null)
node.Parent.NavigateUrl = "";
InitTree(node.ChildNodes, row["power_id"].ToString());
}

}
private void Bind()
{
DataSet ds = new DataSet();
DB c = new DB();
ds = c.GetAll("Tb_xt_jg");
DataTable dtb = ds.Tables[0];
TreeNode root = new TreeNode();
root.Value = "0";
root.Text = "";
root.ImageUrl = "../images/folder.gif";
root.Expanded = true;
this.TreeView1.Nodes.Add(root);
initTree(dtb, "", root);
this.TreeView1.ExpandAll();
}
protected void initTree(DataTable dt, string nFatherid, TreeNode fatherNode)
{
DataView dv = new DataView(dt);

dv.RowFilter = "parentid='"+nFatherid+"'";
foreach (DataRowView Row in dv)
{
TreeNode node = new TreeNode();
if (fatherNode.Value == "0")
{
node.Value = Row["H"].ToString();
node.Text = Row["mc"].ToString();
node.ImageUrl = "../images/folder.gif";
fatherNode.ChildNodes.Add(node);
initTree(dt, Row["BH"].ToString(), node);
}
else
{
node.Text = Row["mc"].ToString();
node.Value = Row["BH"].ToString();
node.ImageUrl = "../images/jg.gif";
fatherNode.ChildNodes.Add(node);

}
}

}

wylp_19 2009-05-29

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[Quote=引用 3 楼 mengxj85 的回复:]
引用 2 楼 lingyuanguang 的回复:
Nodes.Parent

Up

C# codepublic void InitTree(TreeNodeCollection Nds, string parent_id)
{
TreeNode node;
DataRow[] rows = ds.Tables[0].Select("parent_id = '" + parent_id + "'");

foreach (DataRow row in rows)
{
node = new TreeNode(row["powername"].ToString(), row["parent_id"].ToString());
…
[/Quote]

不对未将对象引用到实例。。。

mengxj85 2009-05-29

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[Quote=引用 2 楼 lingyuanguang 的回复:]
Nodes.Parent
[/Quote]
Up

public void InitTree(TreeNodeCollection Nds, string parent_id) 

    { 

        TreeNode node; 

        DataRow[] rows = ds.Tables[0].Select("parent_id = '" + parent_id + "'"); 



        foreach (DataRow row in rows) 

        { 

            node = new TreeNode(row["powername"].ToString(), row["parent_id"].ToString()); 

            Nds.Add(node); 

            node.Parent.NavigateUrl = "";

            InitTree(node.ChildNodes, row["power_id"].ToString()); 

        } 

    }