绑定的DropDownList使用XML [英] bind dropdownlist using XML
本文介绍了绑定的DropDownList使用XML的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是新来ASP.NET,
i am new to ASP.NET,
我想提出国家,州DropDownList的。
i am making Country, state dropdownlist.
有关如:对于特定的国家,我会从XML文件中读取该国的国家
for eg: For particular country, i will read states of that country from XML file.
下面是 XMLFile.xml
<?xml version="1.0" encoding="utf-8" ?>
<countrys>
<country>India</country>
<state>
<text>Maharashtra</text>
<text>Kashmir</text>
<text>Goa</text>
</state>
<country>Sri Lanka</country>
<state>
<text>Kanady</text>
<text>Colombo</text>
<text>Galle</text>
</state>
<country>Australia</country>
<state>
<text>Sydney</text>
<text>Perth</text>
<text>Melbourne</text>
</state>
<country>South Africa</country>
<state>
<text>Capetown</text>
<text>Johanusburg</text>
<text>Durban</text>
</state>
</countrys>
和code在 Country.aspx.cs
public partial class Country : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
LoadDropdown();
}
}
protected void LoadDropdown()
{
DataSet ds = new DataSet();
ds.ReadXml (Server.MapPath("XMLFile.xml"));
DropDownListCountry.DataTextField = "country";
DropDownListCountry.DataSource = ds;
DropDownListCountry.DataBind();
DropDownListCountry.Items.Insert(0,new ListItem(" Select ","0"));
}
}
protected void DropDownListCountry_SelectedIndexChanged(object sender, EventArgs e)
{
string st = (DropDownListCountry.SelectedIndex).ToString();
XDocument main = XDocument.Load(@"XMLFile.xml");
var query = from user in main.Descendants("country_text")
where st == user.Element("state").Value
select user;
DropDownListState.DataSource = query;
DropDownListState.DataBind();
}
}
错误:数据绑定:'System.Data.DataRowView'不包含名称为国家的属性。
ERROR : DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'country'.
推荐答案
将其绑定到country_text
Bind it to country_text
DropDownListCountry.DataTextField = "country_text";
您在您的数据集中三个表。国家,州和文本。在数据集中持有国值的字段是country_text和多数民众赞成你应该绑定到什么
You have three tables in your dataset. Country,State and Text. The field in dataset holding country value is country_text and thats what you should bind to
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