Question

这是TextBox，是事件处理程序：

<asp:Repeater ID="rpt_users" runat="server" OnItemCommand="rpt_users_ItemCommand" OnItemDataBound="rpt_users_ItemDataBound"><ItemTemplate>
        <tr class="c0">
            <td>
                <asp:TextBox runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "daysleft") %>' OnTextChanged="Unnamed_TextChanged" AutoPostBack="true"/>
            </td>
        </tr>
    </ItemTemplate></asp:Repeater>

protected void Unnamed_TextChanged(object sender, EventArgs e)
{
    var repeaterItem = (sender as TextBox).NamingContainer as RepeaterItem;
    var hiddenFieldKey = repeaterItem.FindControl("LoginField") as HiddenField;
    DataTable data = ViewState["Data"] as DataTable;
    var dataRow = data.Rows.Find(hiddenFieldKey.Value);
    var userName = (dataRow[0].ToString()).Replace("'", "''");
    ... //more actions below
}

现在无法触发此事件处理程序。它有时候工作得很好，但最近我从代码隐藏中删除了Page_Init事件处理程序并用Page_Load事件处理程序替换它。这些事实可以联系起来吗？应该遵守哪些条件才能使此处理程序可访问？

Answer 1

转发器数据绑定应该在内部而不是回发条件

public class Test
{
    public string daysleft { get; set; }
}

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindRepeaterItems();
        }
    }

    private void BindRepeaterItems()
    {
         var items = new List<Test>
         {
                new Test {daysleft = "Deepu"},
                new Test {daysleft = "Darsh"}
         };
         rpt_users.DataSource = items;
         rpt_users.DataBind();
    }

    protected void Unnamed_TextChanged(object sender, EventArgs e)
    {
        var repeaterItem = (sender as TextBox).NamingContainer as RepeaterItem;
        var hiddenFieldKey = repeaterItem.FindControl("LoginField") as HiddenField;
    }
}

<asp:Repeater ID="rpt_users" runat="server">
<ItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "daysleft") %>' OnTextChanged="Unnamed_TextChanged" AutoPostBack="true"/><br />
</ItemTemplate>
</asp:Repeater>

无法在ASP.NET应用程序中触发事件处理程序

1 个答案: