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制作一个简单的服务器端控制
作者:采集员 文章来源:来源于网络 点击数: 更新时间:2005/9/10 14:20:13
2000082805.aspx
-------------------------------------------------------------
<%@ Register TagPrefix="CJ" Namespace="cjServerControls" %>
<html>
  <head>
  </head>
  <body>

    <form method="post" action="2000082605.aspx" runat="server">
<CJ:xmlDocReader  listText="au_id" listValue="au_id" runat="server"
path="C:InetpubwwwrootmyASP utorialsauthors.xml" />
    </form>

  </body>
</html>


2000082805a.cs
-------------------------------------------------------------
using System;
using System.Data;
using System.IO;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace cjServerControls
{
public class xmlDocReader : Control, INamingContainer
{
string _xmlPath;
string _listID;
string _listValue;

public string Path
{
get { return _xmlPath; }
set { _xmlPath = value; }
}

public string listText
{
get { return _listID; }
set { _listID = value; }
}

public string listValue
{
get {return _listValue; }
set {_listValue = value; }
}

//Were are creating a member here so we can access it throughout the class
DropDownList _DDL;
DataGrid _DG;
FileStream fs;
StreamReader sr;
DataSet ds;
protected override void PreRender()
{
if (Page.IsPostBack) {
DataView dv = new DataView(ds.Tables[0]);
dv.RowFilter = listValue + "='" + _DDL.SelectedItem.Text + "'";
_DG = new DataGrid();
_DG.DataSource = dv;
_DG.DataBind();
Controls.Add(_DG);
}
}


protected override void CreateChildControls()
{
fs = new FileStream(Path, FileMode.Open, FileAccess.Read);
sr = new StreamReader(fs);
ds = new DataSet();
ds.ReadXml(sr);
fs.Close();

_DDL = new DropDownList();
_DDL.DataTextField = listText;
_DDL.DataValueField = listValue;
_DDL.AutoPostBack = true;
_DDL.DataSource = ds.Tables[0].DefaultView;
_DDL.DataBind();
Controls.Add(_DDL);


}
}
}

authors.xml
-------------------------------------------------------------
<root>
<schema id="DocumentElement" targetNamespace="" xmlns="http://www.w3.org/1999/XMLSchema"
xmlns:xdo="urn:schemas-microsoft-com:xml-xdo" xdo:DataSetName="DocumentElement">
    <element name="Table">
        <complexType content="elementOnly">
            <element name="au_id" type="string"></element>
            <element name="au_lname" type="string"></element>
            <element name="au_fname" type="string"></element>
            <element name="phone" type="string"></element>
            <element name="address" minOccurs="0" type="string"></element>
            <element name="city" minOccurs="0" type="string"></element>
            <element name="state" minOccurs="0" type="string"></element>
            <element name="zip" minOccurs="0" type="string"></element>
            <element name="contract" type="boolean"></element>
        </complexType>
        <unique name="Constraint1" xdo:PrimaryKey="True">
            <selector>.</selector>
            <field>au_id</field>
        </unique>
    </element>
</schema>
<DocumentElement>
    <Table>
        <au_id>000-00-0000</au_id>
        <au_lname>Doe</au_lname>
        <au_fname>John</au_fname>
        <phone>foo         </phone>
        <address>One Microsoft Way</address>
        <city>Redmond</city>
        <state>CA</state>
        <zip>98005</zip>
        <contract>True</contract>
    </Table>
    <Table>
        <au_id>000-00-0123</au_id>
        <au_lname>Millington</au_lname>
        <au_fname>John</au_fname>
        <phone>808 555-5555</phone>
        <address>One Microsoft Way</address>
        <city>Redmond</city>
        <state>CA</state>
        <zip>98005</zip>
        <contract>False</contract>
    </Table>
    <Table>
        <au_id>172-32-1176</au_id>
        <au_lname>White</au_lname>
        <au_fname>Johnson</au_fname>
        <phone>408 496-7223</phone>
        <address>10932 Bigge Rd.</address>
        <city>Menlo Park</city>
        <state>CA</state>
        <zip>94025</zip>
        <contract>True</contract>
    </Table>
    <Table>
        <au_id>213-46-8915</au_id>
        <au_lname>Green</au_lname>
        <au_fname>Marjorie</au_fname>
        <phone>415 986-7020</phone>
        <address>309 63rd St. #411</address>
        <city>Oakland</city>
        <state>CA</state>
        <zip>94618</zip>
        <contract>True</contract>
    </Table>
    <Table>
        <au_id>238-95-7766</au_id>
        <au_lname>Carson</au_lname>
        <au_fname>Cheryl</au_fname>
        <phone>415 548-7723</phone>
        <address>589 Darwin Ln.</address>
        <city>Berkeley</city>
        <state>CA</state>
        <zip>94705</zip>
        <contract>True</contract>
    </Table>
    <Table>
        <au_id>267-41-2

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