这是.aspx.cs文件。
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Xml.Linq;
using System.Linq;
using Telerik.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI;
//using System.Web.UI.Control;
using System.Web;
using System.Web.Util;
using System.Xml;
using System.Windows.Forms;
namespace Grid.Examples.DataEditing.XmlDataSourse
{
public partial class Default : System.Web.UI.Page
{
private const string BACKUP_PATH = "~/App_Data/Xml/NewBuyerLoginRef.xml";
private const string FILE_PATH = "~/App_Data/Xml/NewBuyerLogin.xml";
private const int MAX_LENGTH = 25;
/// <summary>
/// Tracks how many times the page was requested.
/// </summary>
public int TimesRequested
{
get
{
if (this.Application["requested"] == null)
{
this.Application["requested"] = 0;
}
return (int)this.Application["requested"];
}
set
{
this.Application["requested"] = value;
}
}
/* protected void Page_Load(object sender, EventArgs e)
{
TimesRequested++;
if (TimesRequested >= 3)
{
//If the page is requested more than three times, refresh the XML file...
TimesRequested = 0;
RefreshXmlFile(BACKUP_PATH, FILE_PATH);
}
}*/
protected void RadGrid2_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
var sourceDocument = LoadDocument(FILE_PATH);
//var customers = GetCustomersEnumeration(sourceDocument, "Customers", "Customer");
// var customers = from field in sourceDocument.Descendants() select field;
var x = sourceDocument.Descendants("tasks");
var y = x.Descendants("fillPage");
var z= y.Descendants("input");
var w=z.Descendants("fields");
// XmlNodeList nodes= sourceDocument.selectNodes
// IEnumerable<XNode> nodes = sourceDocument.NodesAfterSelf().Single(XElement.Equals(Attribute("seq").Value,"3" )).FirstOrDefault;
var gridSource = (from field in w.Descendants()
select new { id = field.Attribute("id").Value, email = field.Attribute("email").Value, login_passowrd = field.Attribute("login_password").Value });
(sender as RadGrid).DataSource = gridSource;
//Rebind the upper Grid so the changes are reflected
this.RadGrid1.Rebind();
}
protected void RadGrid2_UpdateCommand(object source, GridCommandEventArgs e)
{
GridEditFormItem editForm = (GridEditFormItem)e.Item;
Hashtable newValues = new Hashtable();
//Extract the new values from the editor controls
editForm.ExtractValues(newValues);
//Get the "Primary key" value that will be used to perform CRUD operations
string id = editForm.GetDataKeyValue("id").ToString();
//Load the XML document in memory...
var sourceDocument = LoadDocument(FILE_PATH);
var x = sourceDocument.Descendants("tasks");
var y = x.Descendants("fillPage");
var z = y.Descendants("input");
var w = z.Descendants("fields");
//Get IEnumerable of the Customer elements
// var customers = GetCustomersEnumeration(sourceDocument, "Customers", "Customer");
//Get a reference to the modified record
XElement affectedElement = (from field in z.Descendants()
where field.Attribute("id").Value == id
select field).FirstOrDefault();
//Validate and update the input strings
foreach (DictionaryEntry entry in newValues)
{
affectedElement.Attribute(entry.Key.ToString()).Value = ValidateString(entry.Key.ToString(), entry);
}
//Save the new values to the document
SaveChanges(sourceDocument, FILE_PATH);
}
protected void RadGrid2_InsertCommand(object source, GridCommandEventArgs e)
{
GridEditFormItem editForm = (GridEditFormItem)e.Item;
Hashtable newValues = new Hashtable();
//Extract the new values from the editor controls
editForm.ExtractValues(newValues);
//Load the XML document in memory...
var sourceDocument = LoadDocument(FILE_PATH);
var x = sourceDocument.Descendants();
var y = x.Descendants("fillPage");
var z = y.Descendants("input");
var w = z.Descendants("fields");
//Get IEnumerable of the Customer elements
// var customers = GetCustomersEnumeration(sourceDocument, "Customers", "Customer");
XElement root = (from fields in z
select fields).LastOrDefault();
// int x = 1;
//Construct the new "Primary key"
string lastid = root.Attribute("id").Value;
int a = 1 + Int32.Parse(lastid);
//Add the "Primary key" to the attributes values that will be used to construct the new element
newValues.Add("id", a);
//Construct the new element that will be inserted
XElement element = new XElement("field");
//Validate and add the input strings
foreach (DictionaryEntry entry in newValues)
{
XAttribute attribute = new XAttribute(entry.Key.ToString(), ValidateString(entry.Key.ToString(), entry));
//Add the supplied values as attributes to the newly created element
element.Add(attribute);
}
//Add the newly created element
var b = sourceDocument.Descendants().Descendants("fillPage").Descendants("input").Descendants().LastOrDefault();
b.Add(element);
//Save the new values to the document
SaveChanges(sourceDocument, FILE_PATH);
}
protected void RadGrid2_DeleteCommand(object source, GridCommandEventArgs e)
{
GridDataItem dataItem = (GridDataItem)e.Item;
//Get the "Primary key" value that will be used to perform the Delete operation
string customerID = dataItem.GetDataKeyValue("id").ToString();
//Load the XML document in memory...
XDocument sourceDocument = LoadDocument(FILE_PATH);
var x = sourceDocument.Descendants("tasks");
var y = x.Descendants("fillPage");
var z = y.Descendants("input");
var w = z.Descendants("fields");
//Get IEnumerable of the Customer elements
// var customers = GetCustomersEnumeration(sourceDocument, "Customers", "Customer");
//Get the element that should be deleted
XElement elelemntToDelete = (from field in w.Descendants()
where field.Attribute("id").Value == customerID
select field).FirstOrDefault();
//Remove the element from the XML document
elelemntToDelete.Remove();
//Save the new values to the document
SaveChanges(sourceDocument, FILE_PATH);
}
/// <summary>
/// Load the source document
/// </summary>
/// <param name="path">Path to the source document</param>
/// <returns>XDocument</returns>
private XDocument LoadDocument(string path)
{
XDocument sourceDocument = XDocument.Load(this.Server.MapPath(path));
return sourceDocument;
}
/// <summary>
/// Save the changes to the specified document
/// </summary>
/// <param name="sourceDocument">Path where the document will be saved</param>
/// <param name="path">Path to the file where the changes will be saved</param>
private void SaveChanges(XDocument sourceDocument, string path)
{
try
{
//Save the changes back to the file
sourceDocument.Save(this.Server.MapPath(path));
}
catch (Exception ex)
{
//Notify the user if exception is raised
this.Notification1.Text = ex.Message;
this.Notification1.Show();
}
}
/// <summary>
/// Refresh the source file if more than 5 changes are made
/// </summary>
/// <param name="sourcePath">Path to the source file that will be used for the copy operation</param>
/// <param name="targetPath">Path to the file that needs to be refreshed</param>
private void RefreshXmlFile(string sourcePath, string targetPath)
{
try
{
File.Copy(
this.Server.MapPath(sourcePath),
this.Server.MapPath(targetPath),
true);
}
catch (IOException ex)
{
this.Trace.Write(ex.InnerException.Message);
this.Notification1.Text = ex.InnerException.Message;
this.Notification1.Show();
}
Notification1.Text = "The xml data file was refreshed!";
Notification1.Show();
}
/// <summary>
/// Get all the customers elements from the file
/// </summary>
/// <param name="sourceDocument">File that will be traversed</param>
/// <param name="rootNode">Root node of the document</param>
/// <param name="childNode">Child nodes that will be taken</param>
/// <returns>IEnumerable</returns>
/* private IEnumerable<XElement> GetCustomersEnumeration(XDocument sourceDocument, XName rootNode, XName childNode,XName schild,XName sschild)
{
var customers = sourceDocument.getElementById ;
return customers;
}*/
/// <summary>
/// Validates the input string before it is saved to the file
/// </summary>
/// <param name="attribute">The attribute to which the value should be saved</param>
/// <param name="entry">DictionaryEntry that stores the input value</param>
/// <returns>String</returns>
private string ValidateString(string attribute, DictionaryEntry entry)
{
int strLength = this.ConvertNullToEmpty(entry.Value.ToString()).Length;
//Split the string if it is too long
if (strLength > MAX_LENGTH)
{
return HttpUtility.HtmlEncode(this.ConvertNullToEmpty(entry.Value).Substring(0, MAX_LENGTH));
}
else
{
return HttpUtility.HtmlEncode(this.ConvertNullToEmpty(entry.Value).Substring(0, strLength));
}
}
/// <summary>
/// Converts null value to empty string
/// </summary>
/// <param name="obj">Object that will be converted</param>
/// <returns>String</returns>
private String ConvertNullToEmpty(Object obj)
{
if (obj == null)
{
return String.Empty;
}
else
{
return obj.ToString();
}
}
}
}
这是数据源，即xml文件
<?xml version="1.0" encoding="utf-8"?>
<tasks xmlns="http://xxxxxx.com/systemic/testflow" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xxxxxx.com/systemic/testflow ../../testflow.xsd">
<!-- Seller Login -->
<loadPage seq="1" deleteCookies="true">
<taskName>Load login</taskName>
<location url="/cgi-bin/webscr?cmd=_login-run" relative="true" />
</loadPage>
<clickElement seq="2" optional="true">
<taskName>Click LogIn Button</taskName>
<input>
<fields>
<field id="login-button" waitInSecs="5"/>
</fields>
</input>
</clickElement>
<fillPage seq="3">
<taskName>FillLogin</taskName>
<input>
<fields>
<field id="1" email="guestEmail" login_password="allxo123!"/>
<field id="3" email="guestEmail3" login_password="allxo123!3"/>
<field id="2" email="guestEmail2" login_password="allxo123!2"/>
</fields>
</input>
</fillPage>
<clickElement seq="4">
<taskName>Login</taskName>
<input>
<fields>
<field id="btnLogin" submit="true" submitWait="120"
waitInSecs="25" />
</fields>
</input>
</clickElement>
</tasks>
错误消息显示
名为＆＃39; Value＆＃39;的列已经属于这个DataTable。
但是没有列名称＆＃39;值＆＃39;。在RadGrid2_UpdateCommand函数的第二行抛出异常。
我是新手。所以请帮忙。谢谢。