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// insert data to xml file
protected void Button1_Click(object sender, EventArgs e)
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(Server.MapPath(@"App_Data\smallfools.xml"));
//Create a new node
XmlElement newelement = xmldoc.CreateElement("poems");
XmlElement xmlAuthor = xmldoc.CreateElement("author");
XmlElement xmlTitle = xmldoc.CreateElement("title");
XmlElement xmlContent = xmldoc.CreateElement("content");
xmlAuthor.InnerText = this.TextBox1.Text.Trim();
xmlTitle.InnerText = this.TextBox2.Text.Trim();
xmlContent.InnerText = this.TextBox3.Text.Trim();
newelement.AppendChild(xmlAuthor);
newelement.AppendChild(xmlTitle);
newelement.AppendChild(xmlContent);
xmldoc.DocumentElement.AppendChild(newelement);
//xmlDoc.DocumentElement.InsertAfter(newElement,xmlDoc.DocumentElement.ChildNodes.Item(0));
//xmlDoc.DocumentElement.InsertBefore(newElement,xmlDoc.DocumentElement.ChildNodes.Item(0));
//save
xmldoc.Save(Server.MapPath(@"App_Data\smallfools.xml"));
loadXmlData();
}
// modify one xml data based on selecteditem
protected void Button2_Click(object sender, EventArgs e)
{
if (selectIndex == -1)
{
this.RegisterClientScriptBlock("alertmessage", "<script>alert('please select one modify data item.')</script>");
}
else
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(Server.MapPath(@"App_Data\smallfools.xml"));
XmlNode xmlnode = xmldoc.DocumentElement.ChildNodes.Item(selectIndex);
xmlnode["author"].InnerText = this.TextBox1.Text.Trim();
xmlnode["title"].InnerText = this.TextBox2.Text.Trim();
xmlnode["content"].InnerText = this.TextBox3.Text.Trim();
xmldoc.Save(Server.MapPath(@"App_Data\smallfools.xml"));
loadXmlData();
}
}
// Delete one xml data base on selecteditem
protected void Button3_Click(object sender, EventArgs e)
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(Server.MapPath(@"App_Data\smallfools.xml"));
XmlNode xmlnode = xmldoc.DocumentElement.ChildNodes.Item(selectIndex);
xmlnode.ParentNode.RemoveChild(xmlnode);
xmldoc.Save(Server.MapPath(@"App_Data\smallfools.xml"));
loadXmlData();
this.TextBox1.Text = "";
this.TextBox2.Text = "";
this.TextBox3.Text = "";
}
// clear textbox value
protected void Button4_Click(object sender, EventArgs e)
{
this.TextBox1.Text = "";
this.TextBox2.Text = "";
this.TextBox3.Text = "";
}
// load xml data from xml file
private void loadXmlData()
{
DataSet myDs = new DataSet();
myDs.ReadXml(Server.MapPath(@"App_Data\smallfools.xml"));
if (myDs.Tables.Count > 0)
{
this.GridView1.DataSource = myDs;
this.GridView1.DataBind();
}
}
//select one data and fill data to textbox
private void FindXmlData(int selectedIndex)
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(Server.MapPath(@"App_Data\smallfools.xml"));
XmlNodeList xmlnodelist = xmldoc.DocumentElement.ChildNodes;
XmlNode xmlnode = xmlnodelist.Item(selectedIndex);
this.TextBox1.Text = xmlnode["author"].InnerText;
this.TextBox2.Text = xmlnode["title"].InnerText;
this.TextBox3.Text = xmlnode["content"].InnerText;
}
//get selectedItem index
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
selectIndex = this.GridView1.SelectedIndex;
FindXmlData(selectIndex);
} |