在运行时更新 XmlDataSource
我将此 DropDownList 绑定到 XmlDataSource，但 XPath 必须依赖于另一个输入（另一个 DropDownList）。我修改了 XPath 并在父 DDL 的 SelectedIndexChanged 内重新绑定，但页面没有刷新。我应该怎么做才能显示更新？
protected void ProductDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
CompMapping.XPath = "//couple[@product='" + ProductDropDownList.SelectedValue + "']";
CompMapping.DataBind();
ComponentDropDown.DataBind();
}
ComponentDropDown 设置为 AutoPostBack=True，但这还不够。有什么想法吗？这可能与两个 DropDownList 都在 UserControl 中有关吗？
I have this DropDownList bound to a XmlDataSource, but the XPath must depend on another input (another DropDownList). I modify the XPath and rebind inside the parent DDL's SelectedIndexChanged, but the page does not refresh. What should I do to display the update?
protected void ProductDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
CompMapping.XPath = "//couple[@product='" + ProductDropDownList.SelectedValue + "']";
CompMapping.DataBind();
ComponentDropDown.DataBind();
}
ComponentDropDown is set to AutoPostBack=True, but that's not enough. Any idea? Could it be related to the fact both DropDownLists are in a UserControl?
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该问题必须与它是一个用户控件这一事实有关，因为链接它外部的下拉列表没有问题。意识到我绝对不需要将它们放在用户控件中，我只是将它们移到了外面。这并不能真正解决问题，但至少这不再是我关心的了。
The issue must be linked to the fact that it's a user control, since linking the dropdowns outside it has no problem. Realizing I don't absolutely need these to be in a user control, I just moved them outside. That don't really solves the issue, but at least it's not my concern anymore.