Question

我有一个简单的asp:menu-item使用Web.sitemap来获取菜单项。页面将回发但无法获取与所单击项目关联的页面。我会提到导航条码在主页文件中。

<div>
  <asp:SiteMapDataSource ID="SiteMapDataSource1"  ShowStartingNode="false" runat="server" />
  <asp:Menu ID="Menu1" Orientation="horizontal"  runat="server" BackColor="#a0a080" DataSourceID="SiteMapDataSource1"
      DynamicHorizontalOffset="2" Font-Names="Verdana" Font-Size="0.8em" ForeColor="#a00000"
      StaticSubMenuIndent="10px" Style="z-index: 2; left: 390px; position: absolute;
      top: 281px" Height="20px" Width="311px">
      <StaticSelectedStyle BackColor="#a0a080" />
      <StaticMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
      <DynamicHoverStyle BackColor="#a0a080" ForeColor="White" />
      <DynamicMenuStyle BackColor="#a0a080" />
      <DynamicSelectedStyle BackColor="#a0a080" />
      <DynamicMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
      <DataBindings>
          <asp:MenuItemBinding DataMember="SiteMapNode" EnabledField="Title" TextField="Title" />
      </DataBindings>
      <StaticHoverStyle BackColor="#666666" ForeColor="White" />
  </asp:Menu>
</div>    

<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >  
  <siteMapNode url="" title=""  description="">  
    <siteMapNode title="Home"  description="Zombie (be)Warehouse" url="index.aspx" />  
    <siteMapNode title="Armor" description="Anti-Zombie Armor" url="Armor.aspx" />  
    <siteMapNode title="Weapons" description="Anti-Zombie Weapons" url="Weapons.aspx" />  
    <siteMapNode title="Manuals" description="Survival Manuals" url="Manuals.aspx" />  
    <siteMapNode title="Sustenance" description="Prepared food for survival" url="Sustenance.aspx" />  
    <siteMapNode title="Contacts"  description="Contact Us"  url="Contacts.aspx" />  
    <siteMapNode title="About" description="About Zombie (be)Warehouse" url="About.aspx" />  
  </siteMapNode>  
</siteMap>

更新问题出现在菜单项的DataBindings部分。注意这一行：

<asp:MenuItemBinding DataMember="SiteMapNode" EnabledField="Title" Text="Title" />

Text="Title"从Web.sitemap的文本字段设置菜单显示的文本。我注意到MenuItemBinding项目有一个名为NavigateUrlField的字段。

因此，要解决此问题，您只需更改/添加到asp:MenuItemBinding

即可

<asp:MenuItemBinding DataMember="SiteMapNode" NavigateUrlField="url" EnabledField="Title" TextField="Title" />

Answer 1

您需要像这样E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.app.myapp, PID: 15400 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference at com.example.app.myapp.fragments.myFragment.setInfo(myFragment.java:53) at com.example.app.myapp.MainActivity.onOptionsItemSelected(MainActivity.java:195) at android.app.Activity.onMenuItemSelected(Activity.java:3543) at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:407) at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:195) at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108) at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108) at android.support.v7.app.ToolbarActionBar$2.onMenuItemClick(ToolbarActionBar.java:63) at android.support.v7.widget.Toolbar$1.onMenuItemClick(Toolbar.java:203) at android.support.v7.widget.ActionMenuView$MenuBuilderCallback.onMenuItemSelected(ActionMenuView.java:780) at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822) at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:171) at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:973) at android.support.v7.view.menu.MenuPopup.onItemClick(MenuPopup.java:127) at android.widget.AdapterView.performItemClick(AdapterView.java:318) at android.widget.AbsListView.performItemClick(AbsListView.java:1159) at android.widget.AbsListView$PerformClick.run(AbsListView.java:3136) at android.widget.AbsListView$3.run(AbsListView.java:4052) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)那样将NavigateUrlField字段添加到MenuItemBinding

你如何获得asp：菜单以遵循Web.sitemap中提供的URL？

1 个答案: