我试图根据下拉列表中选择的值将xml文档中的数据绑定到文本框。 !Page.IsPostBack的默认值是xml文件的第一个节点。我不确定如何将xml数据的数据绑定到文本框。任何帮助将不胜感激。
XML:registrations.xml:
<?xml version="1.0" encoding="UTF-8"?>
<RegistrationCollection>
<registrations>
<Registration>
<id>1</id>
<fullName>Keiran Bernal</fullName>
<emailAddress>k.bernal@gmail.com</emailAddress>
<registrationType>Conference Only</registrationType>
<attendingSocialEvent>Yes</attendingSocialEvent>
</Registration>
<Registration>
<id>2</id>
<fullName>Cordelia Pierce</fullName>
<emailAddress>c.pierce@outlook.com</emailAddress>
<registrationType>Conference and Dinner</registrationType>
<attendingSocialEvent>No</attendingSocialEvent>
</Registration>
<Registration>
<id>3</id>
<fullName>Zachery Guy</fullName>
<emailAddress>z.guy@yahoo.com</emailAddress>
<registrationType>Conference Only</registrationType>
<attendingSocialEvent>Yes</attendingSocialEvent>
</Registration>
<Registration>
<id>4</id>
<fullName>Kiana Hawworth</fullName>
<emailAddress>k.hawworth@bigpond.com</emailAddress>
<registrationType>Conference and Dinner</registrationType>
<attendingSocialEvent>No</attendingSocialEvent>
</Registration>
</registrations>
</RegistrationCollection>
ASP.NET背后的代码:edit.aspx.cs:
public partial class edit : System.Web.UI.Page
{
const string FILENAME = "registrations.xml";
string file = "";
protected void Page_Load(object sender, EventArgs e)
{
file = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, FILENAME);
if (!Page.IsPostBack)
{
bindXmlForm();
}
}
protected void bindXmlForm()
{
//Code to deserialize and populate dropdownlist ddlIDEdit
XmlSerializer xmlSerializer = new XmlSerializer(typeof(RegistrationCollection));
FileStream fileStream = new FileStream(file, FileMode.Open);
RegistrationCollection registrationCollection = (RegistrationCollection)xmlSerializer.Deserialize(fileStream);
fileStream.Close();
ddlIdEdit.DataSource = registrationCollection.registrations;
ddlIdEdit.DataValueField = "id";
ddlIdEdit.DataTextField = "id";
ddlIdEdit.DataBind();
txtFullNameEdit.Text = Registration.fullName;//error happens here object reference required.
}
我不确定要使用什么来创建对象引用。 foreach无法正常工作。