Autopostback提示“该对象不支持此属性或方法”(Object doesn’t support this property or method)

在公司调试没有问题,回家改了些许东西,居然DropDownList的Autopostback不起作用了。。。郁闷,google了下。。。 google到的一个解决方法:
问题找到了,原来是最后第二行有个 <asp:button id="submit" runat="server" text="添   加"></asp:button> <asp:button ..="" id="submit"> ====&gt; 变成 <asp:button..>了 晕死,后台里又有 protected System.Web.UI.WebControls.Button submit; 这个东西的,而且 submit 按钮功能一切正常,谁会想到是这个原因。 </asp:button..></asp:button>
和我的情况不符合,只能自己尝试了之了。一一比较两段程序,发现问题了。
  <asp:label forecolor="Aqua" id="Label1" runat="server" text="Label"></asp:label>
 

  Test Project:
  <asp:dropdownlist autopostback="true" id="listTestProj" runat="server"><pre lang="html4strict">  </pre></asp:dropdownlist> Test Plan: <asp:dropdownlist autopostback="true" id="listTestPlan" runat="server"> </asp:dropdownlist> <asp:button id="submit" onclick="Do_Click" runat="server" text="Submit"> </asp:button>
问题出在Button上,我定义其ID为submit,修改为Do就没有问题了。
<asp:label forecolor="Aqua" id="Label1" runat="server" text="Label"></asp:label>

  Test Project:
  <asp:dropdownlist autopostback="true" id="listTestProj" runat="server">
  </asp:dropdownlist>
 

  Test Plan:
  <asp:dropdownlist autopostback="true" id="listTestPlan" runat="server">
  </asp:dropdownlist>
 

  <asp:button id="Do" onclick="Do_Click" runat="server" text="Submit">
</asp:button></pre></div>
<p>估摸着应该是asp.net要求asp.net空间需要放在runat server的form,而form的提交默认为button的submit的缘故。莫名死了。。。</p>
 


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