我在aspx页面中有这个代码:
<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>
我想在UploadResume
中将子节点添加到Page_Load
。我使用此代码但运行时发生错误:
Object reference not set to an instance of an object.
我该怎么做?
答案 0 :(得分:2)
由于UploadResume
是Employee
节点更改TreeView2.FindNode()
的孩子,因为这样:
TreeView2.FindNode("Employee").ChildNodes[0].ChildNodes.Add(new TreeNode("majid", "majid"));