以编程方式将子节点添加到 TreeView

Question

我在 aspx 页面中有这段代码：

<asp:TreeView ShowCheckBoxes="All" runat="server" ID="TreeView2">
<Nodes>
    <asp:TreeNode Text="Home" NavigateUrl="~/Home.aspx" Target="_blank" />
    <asp:TreeNode Text="Employee" Value="Employee" NavigateUrl="~/Employee.aspx" Target="_blank">
        <asp:TreeNode Text="UploadResume" Value="UploadResume"   NavigateUrl="~/Upload_Resume.aspx" Target="_blank" />
        <asp:TreeNode Text="Edit Resume" NavigateUrl="~/Edit_Resume.aspx" Target="_blank" />
        <asp:TreeNode Text="View Resume" NavigateUrl="~/View_Resume.aspx" Target="_blank" />
    </asp:TreeNode>
    <asp:TreeNode Text="Employer" NavigateUrl="~/Employer.aspx" Target="_blank">
        <asp:TreeNode Text="Upload Job" NavigateUrl="~/Upload_Job.aspx" Target="_blank" />
        <asp:TreeNode Text="Edit Job" NavigateUrl="~/Edit_Job.aspx" Target="_blank" />
        <asp:TreeNode Text="View Job" NavigateUrl="~/View_Job.aspx" Target="_blank" />
    </asp:TreeNode>
    <asp:TreeNode Text="Admin" NavigateUrl="~/Admin.aspx" Target="_blank">
        <asp:TreeNode Text="Add User" NavigateUrl="~/Add_User.aspx" Target="_blank" />
        <asp:TreeNode Text="Edit User" NavigateUrl="~/Edit_Use.aspx" Target="_blank" />
        <asp:TreeNode Text="View User" NavigateUrl="~/View_User.aspx" Target="_blank" />
    </asp:TreeNode>
</Nodes>

我想将子节点添加到 Page_Load 中的 UploadResume。我使用了这段代码，但发生了运行次错误： Object reference not set to an instance of an object.

我该怎么做？

Answer 1

由于 UploadResume 是 Employee 节点的子节点更改 TreeView2.FindNode() 如下：

TreeView2.FindNode("Employee").ChildNodes[0].ChildNodes.Add(new TreeNode("majid", "majid"));

以编程方式将子节点添加到 TreeView

Add child node to TreeView programmatically

c#

asp.net

treeview