在昨天作业的基础上添加 ：删除按钮，修改并保存按钮 和 添加按钮。完成这些按钮所对应的功能/新建页面DataXML,使用GridView显示book.xm中的图书信息
1. 在昨天作业的基础上添加 ：删除按钮，修改并保存按钮 和 添加按钮。完成这些按钮所对应的功能（XmlDocument）。
前台：
后台：
namespace SML21
{
public partial class Demo3 : System.Web.UI.Page
{
XmlDocument xdoc;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
xdoc = new XmlDocument();//声明一个xml文档实例,xdoc代表一个xml文档，但是代表谁现在没有定
xdoc.Load(Server.MapPath("books.xml"));//把books这个xml文档copy一份给xdoc
XmlNodeList list = xdoc.GetElementsByTagName("name");
foreach (XmlNode node in list)
{
this.DropDownList1.Items.Add(node.InnerText);
}
Session["doc"] = xdoc;
}
else
{
xdoc = Session["doc"] as XmlDocument;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
XmlNode node=xdoc.DocumentElement.SelectSingleNode("book[name='"+this.DropDownList1.Text+"']");
//方法一：
foreach (XmlNode item in node.ChildNodes)
{
if (item.LocalName == "author")
{
this.TextBox1.Text = item.InnerText;
}
if (item.LocalName == "publisher")
{
this.TextBox2.Text = item.InnerText;
}
if (item.LocalName == "date")
{
this.TextBox3.Text = item.InnerText;
}
if (item.LocalName == "isbn")
{
this.TextBox4.Text = item.InnerText;
}
if (item.LocalName == "price")
{
this.TextBox5.Text = item.InnerText;
}
}
//方法二：
TextBox1.Text = node.SelectSingleNode("author").InnerText;
TextBox2.Text = node.SelectSingleNode("publisher").InnerText;
TextBox3.Text = node.SelectSingleNode("date").InnerText;
TextBox4.Text = node.SelectSingleNode("isbn").InnerText;
TextBox5.Text = node.SelectSingleNode("price").InnerText;
}
protected void Button2_Click(object sender, EventArgs e)
{//删除
XmlNode node= xdoc.DocumentElement.SelectSingleNode("book[name'"+this.DropDownList1.Text+"']");//找到要删除的节点
xdoc.DocumentElement.RemoveChild(node);//把该节点在xml document实例中移除
this.DropDownList1.Items.RemoveAt(this.DropDownList1.SelectedIndex);
xdoc.Save(Server.MapPath("books_new.xml"));
this.Response.Write("删除");
}
protected void Button3_Click(object sender, EventArgs e)
{//修改并保存
XmlNode node = xdoc.DocumentElement.SelectSingleNode("book[name'" + this.DropDownList1.Text+"']");
node.SelectSingleNode("author").InnerText = this.TextBox1.Text;
node.SelectSingleNode("publisher").InnerText = this.TextBox2.Text;
node.SelectSingleNode("date").InnerText = this.TextBox3.Text;
node.SelectSingleNode("isbn").InnerText = this.TextBox4.Text;
node.SelectSingleNode("price").InnerText = this.TextBox5.Text;
xdoc.Save(Server.MapPath("books.xml"));
this.ClientScript.RegisterClientScriptBlock(this.GetType(), "key2", "");
// Page.RegisterClientScriptBlock("key1","");
}
protected void Button4_Click(object sender, EventArgs e)
{//添加
XmlElement book= xdoc.CreateElement("book");
XmlElement na = xdoc.CreateElement("name");
na.AppendChild(xdoc.CreateTextNode(this.TextBox6.Text));
XmlElement au = xdoc.CreateElement("author");
au.AppendChild(xdoc.CreateTextNode(this.TextBox1.Text));
XmlElement pu = xdoc.CreateElement("publisher");
au.AppendChild(xdoc.CreateTextNode(this.TextBox2.Text));
XmlElement da = xdoc.CreateElement("date");
au.AppendChild(xdoc.CreateTextNode(this.TextBox3.Text));
XmlElement isd = xdoc.CreateElement("isbn");
au.AppendChild(xdoc.CreateTextNode(this.TextBox4.Text));
XmlElement pr = xdoc.CreateElement("price");
au.AppendChild(xdoc.CreateTextNode(this.TextBox5.Text));
book.AppendChild(na);
book.AppendChild(au);
book.AppendChild(pu);
book.AppendChild(da);
book.AppendChild(isd);
book.AppendChild(pr);
xdoc.DocumentElement.AppendChild(book);
this.DropDownList1.Items.Add(this.TextBox6.Text);
xdoc.Save(Server.MapPath("books_new2.xml"));
this.ClientScript.RegisterClientScriptBlock(this.GetType(), "kk", "");
}
}
}
2.新建页面DataXML,使用GridView显示book.xm中的图书信息（将books.xml文档和dataSet交互。注意：DataView的使用。ds.Tables[0].defaultView）。添加 删除、编辑、修改并保存、添加、查找、生成XML按钮并完成对应的功能（如视频所示）
前台：
后台：
namespace DataListSetAndXml
{
public partial class Demo1 : System.Web.UI.Page
{
DataSet ds;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ds = new DataSet();
ds.ReadXml(Server.MapPath("books.xml")); //读出数据
Session["ds"] = ds;
bindXML();
}
else
{
ds = Session["ds"] as DataSet;
}
}
private void bindXML()
{
this.GridView1.DataSource = ds.Tables[0].DefaultView;
this.GridView1.DataBind();
}
protected void Button4_Click(object sender, EventArgs e)
{
//添加
DataRow row =ds.Tables[0].NewRow();
row["name"] = this.TextBox6.Text;
row["author"] = this.TextBox1.Text;
row["publisher"] = this.TextBox2.Text;
row["date"] = this.TextBox3.Text;
row["isbn"] = this.TextBox4.Text;
row["price"] = this.TextBox5.Text;
ds.Tables[0].Rows.Add(row);
this.bindXML();
}
protected void Button5_Click(object sender, EventArgs e)
{//查找
ds.Tables[0].DefaultView.RowFilter = "name like '%" + this.TextBox7.Text + "%'";//这个写法和sql语句中的where 条件一样。
this.bindXML();
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{//删除
//1.在视图里完成删除
//ds.Tables[0].DefaultView.Delete(e.RowIndex);
//2.直接在DataTable中删除
ds.Tables[0].Rows.RemoveAt(e.RowIndex);
this.bindXML();//删完了进行再次绑定
}
protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
{//编辑
DataRowView row= ds.Tables[0].DefaultView[e.NewSelectedIndex];
this.TextBox6.Text=row["name"].ToString();
this.TextBox1.Text = row["author"].ToString();
this.TextBox2.Text = row["publisher"].ToString();
this.TextBox3.Text = row["date"].ToString();
this.TextBox4.Text = row["isbn"].ToString();
this.TextBox5.Text = row["price"].ToString();
}
protected void Button3_Click(object sender, EventArgs e)
{//修改并保存
int index= this.GridView1.SelectedIndex;
DataRowView row= ds.Tables[0].DefaultView[index];
row["name"]= this.TextBox6.Text;
row["author"]= this.TextBox1.Text ;
row["publisher"]= this.TextBox2.Text;
row["date"]= this.TextBox3.Text;
row["isbn"] = this.TextBox4.Text;
row["price"] =this.TextBox5.Text ;
this.bindXML();
}
protected void Button6_Click(object sender, EventArgs e)
{//写入数据 生成xml文档
ds.WriteXml(Server.MapPath("books2.xml"), XmlWriteMode.IgnoreSchema);
ds.WriteXmlSchema(Server.MapPath("shema2.xml"));
this.Response.Write("over!");
}
}
}