Question

我在内容页面中使用了treeview。 Treeview正确填充。（即子节点和父节点）我在获取树视图的CheckedNodes.Count属性时遇到问题。下面是我的asp.net treeview标签：

 <asp:TreeView ID="TreeView1" runat="server" ShowCheckBoxes="Leaf" class="ztree">
             <ParentNodeStyle Font-Bold="True" />
<SelectedNodeStyle BackColor="#B5B5B5" Font-Underline="False" HorizontalPadding="0px"
    VerticalPadding="0px" />
        </asp:TreeView>

将日期绑定到TreeView的代码

private void PopulateTreeView(DataTable dtParent, int parentId, TreeNode treeNode)
    {
        foreach (DataRow masterRow in dtParent.Rows)
        {
            TreeNode masterNodes = new TreeNode
            {
                Text = masterRow["questionText"].ToString(),
                Value = masterRow["questionId"].ToString()
            };
            if (parentId == 0)
            {
                TreeView1.Nodes.Add(masterNodes);
                DataTable dtChild = this.GetData("SELECT choiceIndex, choiceName FROM dbo.VWDummy WHERE questionId  = " + masterNodes.Value);
                PopulateChildTreeView(dtChild, int.Parse(masterNodes.Value), masterNodes);
            }

        }
    }

    private void PopulateChildTreeView(DataTable dtChild, int parentId, TreeNode treeNode)
    {

        foreach (DataRow row in dtChild.Rows)
        {
            TreeNode child = new TreeNode
            {
                Text = row["choiceName"].ToString(),
                Value = row["choiceIndex"].ToString()
            };

            treeNode.ChildNodes.Add(child);

        }

    }

在页面后面点击以下按钮代码。

<asp:LinkButton ID="LinkButton1" runat="server" OnClick="test">Done</asp:LinkButton>

protected void test(object sender, EventArgs e)
    {

        string childValue;
        string childtext;
        string parentval;
        int counter = 0;

        if (TreeView1.CheckedNodes.Count > 0)
        {
            foreach (TreeNode node in TreeView1.CheckedNodes)
            {
                if (node.Parent != null)
                {
                    parentval = node.Parent.Value.ToString();
                    childtext = node.Text.ToString();
                    childValue = node.Value.ToString();
                    questId.Add(parentval);
                    choiceIndex.Add(childValue);
                    counter++;
                }

在调试时，我发现“TreeView1.CheckedNodes.Count”返回0计数，即使我选择了3个子节点。

我该如何解决这个问题？

复选框树视图asp.net的onclick事件无法正常工作

0 个答案: