Question

当我在列表视图中按任意链接按钮时，它根本不会启动

<div>
   <%
      String[] d1 = { "1", "2", "3" };
      String[] d2 = { "4", "5", "6", "7" };
      ListView1.DataSource = d1;
      ListView1.DataBind();
      ListView2.DataSource = d2;
      ListView2.DataBind();
   %>
   <asp:ListView ID="ListView1" runat="server" OnItemCommand="lv_command">
      <LayoutTemplate>
          <ul>
              <asp:PlaceHolder ID="itemPlaceholder" runat="server" />
          </ul>
      </LayoutTemplate>
      <ItemTemplate>
          <asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
      </ItemTemplate>
   </asp:ListView>
   <asp:ListView ID="ListView2" runat="server" OnItemCommand="lv_command">
      <LayoutTemplate>
          <ul>
              <asp:PlaceHolder ID="itemPlaceholder" runat="server" />
          </ul>
      </LayoutTemplate>
      <ItemTemplate>
          <asp:LinkButton ID="LinkButton2" runat="server">LinkButton</asp:LinkButton>
      </ItemTemplate>
   </asp:ListView>
</div>

protected void lv_command(object sender, ListViewCommandEventArgs e)
{
  int i = 0;
}

Answer 1

设置每个LinkButtons的CommandName属性，例如：

 <asp:LinkButton ID="LinkButton1" runat="server" CommandName="MyCommand">LinkButton</asp:LinkButton>

因此，当引发ItemCommand事件时，您可以检测是否从链接按钮触发它，如下所示：

     protected void lv_command(object sender, ListViewCommandEventArgs e)
    {
  if(e.CommandName == "MyCommand")
  {
    //do something
  }
}

此外，仅在初始加载时绑定listview并在需要时再次从某些事件处理程序绑定它更具性能：

    protected void Page_Load(object sender, EventArgs e)
{
   if(!Page.IsPostBack)
   {
    String[] d1 = { "1", "2", "3" };
    String[] d2 = { "4", "5", "6", "7" };
    ListView1.DataSource = d1;
    ListView1.DataBind();
    ListView2.DataSource = d2;
    ListView2.DataBind();
   }
}

Answer 2

将执行数据绑定的逻辑移动到代码隐藏中：

protected void Page_Load(object sender, EventArgs e)
{
    String[] d1 = { "1", "2", "3" };
    String[] d2 = { "4", "5", "6", "7" };
    ListView1.DataSource = d1;
    ListView1.DataBind();
    ListView2.DataSource = d2;
    ListView2.DataBind();
}

protected void lv_command(object sender, ListViewCommandEventArgs e)
{
  int i = 0;
}

listview ItemCommand不启动

2 个答案: