GridView 保存 XML 一例

作者：孟宪会阅读：481 发表于：2011-11-01 14:10:00

下面是一个使用GridView控件添加数据，并保存到 XML 文件的例子。初始化时文件可以不存在，可以为空内容

ClientEmails.xml 内容格式


<?xml version="1.0" standalone="yes"?>

<c>

  <e id="1">

    <name>xx</name>

    <email>xx.com</email>

  </e>

  <e id="2">

    <name>xx</name>

    <email>xx.com</email>

  </e>

</c>

完整的实现代码

ASPX 代码


<%@ Page Language="C#" Trace="false" AutoEventWireup="true" %>



<%@ Import Namespace="System.IO" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">



  protected void Page_Load(object sender, EventArgs e)

  {

    if (!Page.IsPostBack)

    {

      String file = Server.MapPath("~/App_Data/ClientEmails.xml");

      if (!System.IO.File.Exists(file))

      {

        HiddenField1.Value = "Blank";

        return;

      }

      String xml = System.IO.File.ReadAllText(file);

      if (xml.Trim().Equals(String.Empty))

      {

        HiddenField1.Value = "Blank";

        return;

      }

      bind();

    }

  }



  void bind()

  {

    System.Data.DataSet ds = new System.Data.DataSet();

    ds.ReadXml(Server.MapPath("~/App_Data/ClientEmails.xml"));

    grvEmail.DataSource = ds.Tables[0];

    grvEmail.DataBind();



    grvEmail.HeaderRow.Cells[0].Text = "姓名";

    grvEmail.HeaderRow.Cells[1].Text = "电子邮件";

    grvEmail.HeaderRow.Cells[2].Visible = false;

    grvEmail.FooterRow.Cells[2].Visible = false;

    for (int i = 0; i < grvEmail.Rows.Count; i++)

    {

      grvEmail.Rows[i].Cells[2].Visible = false;

    }

  }

  protected void Button1_Click(object sender, EventArgs e)

  {

    if (HiddenField1.Value.Equals("Blank"))

    {

      // 首次添加。创建新文件

      String file = Server.MapPath("~/App_Data/ClientEmails.xml");

      if (System.IO.File.Exists(file))

      {

        System.IO.File.Delete(file);

      }



      System.Xml.XmlDocument doc = new System.Xml.XmlDocument();

      //创建xml声明

      System.Xml.XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "utf-8", "yes");

      doc.AppendChild(dec);

      System.Xml.XmlNode root = doc.CreateElement("c");

      System.Xml.XmlNode ee = doc.CreateElement("e");

      System.Xml.XmlAttribute id = doc.CreateAttribute("id");

      id.Value = "-100";

      ee.Attributes.Append(id);

      System.Xml.XmlNode name = doc.CreateElement("name");

      System.Xml.XmlNode email = doc.CreateElement("email");

      ee.AppendChild(name);

      ee.AppendChild(email);

      root.AppendChild(ee);

      doc.AppendChild(root);

      doc.Save(file);

    }



    System.Data.DataSet ds = new System.Data.DataSet();

    ds.ReadXml(Server.MapPath("~/App_Data/ClientEmails.xml"));

    System.Data.DataTable table = ds.Tables[0];

    System.Data.DataRow[] rs = table.Select("", "id desc");

    String MaxId = rs[0]["id"].ToString();

    int maxId = MaxId == "-100" ? 0 : Int32.Parse(MaxId);

    for (int i = 0; i < Request.Form.AllKeys.Length; i++)

    {

      string id = "";

      if (Request.Form.AllKeys[i].StartsWith("xm"))

      {

        maxId++;

        id = Request.Form.AllKeys[i].Substring(2);

        String xm = Request.Form["xm" + id];

        String yj = Request.Form["yj" + id];

        System.Data.DataRow dr = table.NewRow();

        dr["name"] = xm;

        dr["email"] = yj;

        dr["id"] = maxId;

        table.Rows.Add(dr);

      }

    }

    if (MaxId == "-100")

    {

      table.Rows.RemoveAt(0);

      table.AcceptChanges();

    }

    ds.WriteXml(Server.MapPath("~/App_Data/ClientEmails.xml"));



    Response.Redirect(Request.UrlReferrer.ToString());

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

  <title>无标题页</title>

  <script type="text/javascript">

    var xm = '<%=TextBox1.ClientID %>';

    var yj = '<%=TextBox2.ClientID %>';

    var tb = '<%=grvEmail.ClientID %>';

    var button1 = '<%=Button1.ClientID %>';

    var i = 0;    

    function Add() {

      x = document.getElementById(xm).value;

      y = document.getElementById(yj).value;

      t = document.getElementById(tb);

      

      if (!t) {

        t = document.createElement("table");

        t.setAttribute("cellspacing",0);

        t.setAttribute("rules","all");

        t.setAttribute("border","1");

        t.setAttribute("style","border-collapse:collapse");

        t.id = "grvEmail";

        tbody = document.createElement("tbody");

        tr = document.createElement("tr");

        th = document.createElement("th");

        th.setAttribute("scope","col");

        th.innerHTML = "姓名";

        tr.appendChild(th)

        th = document.createElement("th");

        th.setAttribute("scope","col");

        th.innerHTML = "电子邮件";

        tr.appendChild(th)

        tbody.appendChild(tr)

        t.appendChild(tbody)



        button1 = document.getElementById(button1);

        button1.parentNode.insertBefore(t, button1);

      }

      tr = document.createElement("tr");

      td = document.createElement("td");

      td.innerHTML = x + "<input name=xm" + i + " value='" + x + "' type='hidden'>";

      tr.appendChild(td);

      td = document.createElement("td");

      td.innerHTML = y + "<input name=yj" + i + " value='" + y + "' type='hidden'>"; ;

      tr.appendChild(td);

      t.tBodies[0].appendChild(tr);

      i++;

      return false;

    }

  </script>

</head>

<body>

  <form id="form1" runat="server">

  姓名：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

  邮件：<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

  <asp:Button ID="Button2" runat="server" Text="添加" OnClientClick="return Add()" />

  <asp:GridView ID="grvEmail" runat="server">

  </asp:GridView>

  <asp:HiddenField ID="HiddenField1" runat="server" />

  <asp:Button ID="Button1" runat="server" Text="保存" OnClick="Button1_Click" />

  </form>

</body>

</html>

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