c# - 运行时编译错误

Question

我正在尝试将下拉列表绑定(bind)到查询结果，我认为我已经按照我应该的方式进行了所有设置，但是在我的页面加载之前我得到了一个错误。这是我得到的错误

编译错误

描述:

An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

编译器错误消息:

CS1061: 'ASP.pages_firstloaded_aspx' does not contain a definition for 'ddlMembers_SelectedIndexChanged' and no extension method 'ddlMembers_SelectedIndexChanged' accepting a first argument of type 'ASP.pages_firstloaded_aspx' could be found (are you missing a using directive or an assembly reference?)

这是更详细的信息:

<div class="WhiteBackgroundForDataGrids">
  <font class="BoldTextBlack">Member Names:</font>
    <asp:DropDownList runat="server" ID="ddlMembers" CssClass="DropDownLists" 
        Width="120px" onselectedindexchanged="ddlMembers_SelectedIndexChanged">
    </asp:DropDownList>

但在我背后的 C# 代码中，我有这个(我认为这是它正在搜索的内容)

protected void ddlMembers_OnSelectedIndexChanged(object sender, EventArgs e)
{
}

编辑 - -
即使将事件处理程序添加到 SelectedIndexChanged 后，它仍然会出现相同的错误。

Answer 1

您的代码背后的问题如下:

protected void ddlMembers_OnSelectedIndexChanged(object sender, EventArgs e)
{

}

由于它是一个事件处理程序，因此您需要确保控件可以发送数据和上下文。