我的categories.xml文件在下面给出
<categories>
<root name="Cars -Vehicles" id="CV"></root>
<root name="Personals" id="PER"></root>
<root name="Real Estate" id="RE"></root>
<root name="Property For Rent" id="PFR"></root>
<root name="Community" id="COM"></root>
</categories>
和我的attibutes.xml文件在下面给出
<attributes>
<attribute value="ethnicity=ethnicity_african_american" name ="American Indian" categoryid="PER"/>
<attribute value="ethnicity=ethnicity_asian_pacific_islander" name ="Asian - Pacific Islander" categoryid="PER"/>
<attribute value="ethnicity=ethnicity_caucasian" name ="Caucasian" categoryid="PER"/>
<attribute value="amenities=amenities_ac" name ="AC" categoryid="RE, PFR"/>
<attribute value="amenities=amenities_alarm" name ="Alarm" categoryid="RE, PFR"/>
</attributes>
我将attributeDropdown
绑定在categoriesDropDown
的选择上。代码如下:
protected void ddCategories_SelectedIndexChanged(object sender, EventArgs e)
{
XmlDataSource xd = new XmlDataSource();
xd.DataFile = Server.MapPath("Xmls") + "\\attributes.xml";
xd.XPath = "/attributes/attribute[@categoryid='" +
categoriesDropDown.SelectedValue.ToString() + "']";
attributeDropdown.DataSource = xd;
attributeDropdown.DataTextField = "name";
attributeDropdown.DataValueField = "value";
attributeDropdown.DataBind();
// categoriesDropDown.DataTextField = "name";
// categoriesDropDown.DataValueField = "id";
}
现在问题是名为 AC 的两个属性和警报分为两类 房地产 和 物业出租 。如何在选择这些类别时绑定这些属性?
如果属性属于多个类别,请说明我的Xpath Expression应该是什么?
答案 0 :(得分:1)
也许这不是一个好的解决方案,但你可以使用contains
函数,例如:
/attributes/attribute[contains(@categoryid, 'category')]
根据你的代码:
xd.XPath = string.Format("/attributes/attribute[contains(@categoryid, '{0}')]",
categoriesDropDown.SelectedValue);