怎么用C#语言实现串口通讯

//
//bool xmltextreader.read(): 读取流中下一个节点，当读完最后一个节点再次调用该方法该方法返回false
//xmlnodetype xmltextreader.nodetype: 该属性返回当前节点的类型
// xmlnodetype.element 元素节点
// xmlnodetype.endelement 结尾元素节点
// xmlnodetype.xmldeclaration 文档的第一个节点
// xmlnodetype.text 文本节点
//bool xmltextreader.hasattributes: 当前节点有没有属性，返回true或false
//string xmltextreader.name: 返回当前节点的名称
//string xmltextreader.value: 返回当前节点的值
//string xmltextreader.localname: 返回当前节点的本地名称
//string xmltextreader.namespaceuri: 返回当前节点的命名空间uri
//string xmltextreader.prefix: 返回当前节点的前缀
//bool xmltextreader.movetonextattribute(): 移动到当前节点的下一个属性
//---------------------------------------------------------------------------------------------------

namespace xmlreading
{
using system;
using system.xml;
using system.windows.forms;
using system.componentmodel;

/// ＜summary＞
/// xml文件读取器
/// ＜/summary＞

public class xmlreader : idisposable
{
private string _xmlpath;
private const string _errmsg = "error occurred while reading ";
private listbox _listbox;
private xmltextreader xmltxtrd;

#region xmlreader 的构造器

public xmlreader()
{
this._xmlpath = string.empty;
this._listbox = null;
this.xmltxtrd = null;
}

/// ＜summary＞
/// 构造器
/// ＜/summary＞
/// ＜param name="_xmlpath"＞xml文件绝对路径＜/param＞
/// ＜param name="_listbox"＞列表框用于显示xml＜/param＞

public xmlreader(string _xmlpath, listbox _listbox)
{
this._xmlpath = _xmlpath;
this._listbox = _listbox;
this.xmltxtrd = null;
}

#endregion
#region xmlreader 的资源释放方法

/// ＜summary＞
/// 清理该对象所有正在使用的资源

/// ＜/summary＞

public void dispose()
{
this.dispose(true);
gc.suppressfinalize(this);
}

/// ＜summary＞
/// 释放该对象的实例变量
/// ＜/summary＞
/// ＜param name="disposing"＞＜/param＞

protected virtual void dispose(bool disposing)
{
if (!disposing)
return;
if (this.xmltxtrd != null)
{
this.xmltxtrd.close();
this.xmltxtrd = null;
}

if (this._xmlpath != null)
{
this._xmlpath = null;
}
}

#endregion
#region xmlreader 的属性

/// ＜summary＞
/// 获取或设置列表框用于显示xml
/// ＜/summary＞

public listbox listbox
{
get
{
return this._listbox;
}
set
{
this._listbox = value;
}
}

/// ＜summary＞
/// 获取或设置xml文件的绝对路径
/// ＜/summary＞

public string xmlpath
{
get
{
return this._xmlpath;
}
set
{
this._xmlpath = value;
}
}

#endregion

/// ＜summary＞
/// 遍历xml文件
/// ＜/summary＞

public void eachxml()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
this._listbox.items.add(this.xmltxtrd.value);
}
}
catch(xmlexception exp)
{
throw new xmlexception(_errmsg + this._xmlpath + exp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的节点类型
/// ＜/summary＞

public void readxmlbynodetype()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
this._listbox.items.add(this.xmltxtrd.nodetype.tostring());
}
}
catch(xmlexception exp)
{
throw new xmlexception(_errmsg + this._xmlpath + exp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 根据节点类型过滤xml文档
/// ＜/summary＞
/// ＜param name="xmlntype"＞xmlnodetype 节点类型的数组＜/param＞

public void filterbynodetype(xmlnodetype[] xmlntype)
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);
try
{
while(xmltxtrd.read())
{
for (int i = 0; i ＜ xmlntype.length; i++)
{
if (xmltxtrd.nodetype == xmlntype[i])
{
this._listbox.items.add(xmltxtrd.name + " is type " + xmltxtrd.nodetype.tostring());
}
}
}
}
catch(xmlexception exp)
{
throw new xmlexception(_errmsg + this.xmlpath + exp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的所有文本节点值

/// ＜/summary＞

public void readxmltextvalue()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.text)
{
this._listbox.items.add(xmltxtrd.value);
}
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的属性
/// ＜/summary＞

public void readxmlattributes()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.element)
{
if (xmltxtrd.hasattributes)
{
this._listbox.items.add("the element " + xmltxtrd.name + " has " + xmltxtrd.attributecount + " attributes");

this._listbox.items.add("the attributes are:");

while(xmltxtrd.movetonextattribute())
{
this._listbox.items.add(xmltxtrd.name + " = " + xmltxtrd.value);
}
}
else
{
this._listbox.items.add("the element " + xmltxtrd.name + " has no attribute");
}
this._listbox.items.add("");
}
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的命名空间
/// ＜/summary＞

public void readxmlnamespace()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);
try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.element && xmltxtrd.prefix != "")
{
this._listbox.items.add("the prefix " + xmltxtrd.prefix + " is associated with namespace " + xmltxtrd.namespaceuri);

this._listbox.items.add("the element with the local name " + xmltxtrd.localname + " is associated with" + " the namespace " + xmltxtrd.namespaceuri);
}

if (xmltxtrd.nodetype == xmlnodetype.element && xmltxtrd.hasattributes)
{
while(xmltxtrd.movetonextattribute())
{
if (xmltxtrd.prefix != "")
{
this._listbox.items.add("the prefix " + xmltxtrd.prefix + " is associated with namespace " + xmltxtrd.namespaceuri);

this._listbox.items.add("the attribute with the local name " + xmltxtrd.localname + " is associated with the namespace " + xmltxtrd.namespaceuri);

}
}
}
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取整个xml文件
/// ＜/summary＞

public void readxml()
{
string attandele = string.empty;
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.xmldeclaration)
this._listbox.items.add(string.format("＜?{0} {1} ?＞",xmltxtrd.name,xmltxtrd.value));
else if (xmltxtrd.nodetype == xmlnodetype.element)
{
attandele = string.format("＜{0} ",xmltxtrd.name);
if (xmltxtrd.hasattributes)
{
while(xmltxtrd.movetonextattribute())
{
attandele = attandele + string.format("{0}='{1}' ",xmltxtrd.name,xmltxtrd.value);
}
}

attandele = attandele.trim() + "＞";
this._listbox.items.add(attandele);
}
else if (xmltxtrd.nodetype == xmlnodetype.endelement)
this._listbox.items.add(string.format("＜/{0}＞",xmltxtrd.name));
else if (xmltxtrd.nodetype == xmlnodetype.text)
this._listbox.items.add(xmltxtrd.value);
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}
}
}

窗体代码如下：

namespace xmlreading

{

using system;

using system.drawing;

using system.collections;

using system.componentmodel;

using system.windows.forms;

using system.data;

using system.xml;

public class form1 : system.windows.forms.form

{

private system.windows.forms.listbox listbox1;

private system.windows.forms.button button1;

private system.windows.forms.button button2;

private system.windows.forms.button button3;

private system.windows.forms.button button4;

private system.windows.forms.button button5;

private system.windows.forms.button button6;

private system.windows.forms.button button7;

private string xmlpath;

private xmlreader xread;

/// ＜summary＞

/// 必需的设计器变量。

/// ＜/summary＞

private system.componentmodel.container components = null;

public form1()

{

initializecomponent();

}

/// ＜summary＞

/// 清理所有正在使用的资源。

/// ＜/summary＞

protected override void dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.dispose();

}

}

base.dispose( disposing );

}

#region windows 窗体设计器生成的代码

/// ＜summary＞

/// 设计器支持所需的方法 - 不要使用代码编辑器修改

/// 此方法的内容。

/// ＜/summary＞

private void initializecomponent()

{

this.listbox1 = new system.windows.forms.listbox();

this.button1 = new system.windows.forms.button();

this.button2 = new system.windows.forms.button();

this.button3 = new system.windows.forms.button();

this.button4 = new system.windows.forms.button();

this.button5 = new system.windows.forms.button();

this.button6 = new system.windows.forms.button();

this.button7 = new system.windows.forms.button();

this.suspendlayout();

//

// listbox1

//

this.listbox1.anchor = ((system.windows.forms.anchorstyles)((((system.windows.forms.anchorstyles.top | system.windows.forms.anchorstyles.bottom)

| system.windows.forms.anchorstyles.left)

| system.windows.forms.anchorstyles.right)));

this.listbox1.itemheight = 12;

this.listbox1.location = new system.drawing.point(8, 8);

this.listbox1.name = "listbox1";

this.listbox1.size = new system.drawing.size(716, 460);

this.listbox1.tabindex = 0;

//

// button1

//

this.button1.anchor = ((system.windows.forms.anchorstyles)((system.windows.forms.anchorstyles.bottom | system.windows.forms.anchorstyles.left)));

this.button1.location = new system.drawing.point(8, 488);

this.button1.name = "button1";

this.button1.tabindex = 1;

this.button1.text = "example1";

this.button1.click += new system.eventhandler(this.button1_click);

//

// button2

//

this.button2.anchor = ((system.windows.forms.anchorstyles)((system.windows.forms.anchorstyles.bottom | system.windows.forms.anchorstyles.left)));

this.button2.location = new system.drawing.point(96, 488);

this.button2.name = "button2";

this.button2.tabindex = 2;

this.button2.text = "example2";

this.button2.click += new system.eventhandler(this.button2_click);

//

// button3

//

this.button3.anchor = ((system.windows.forms.anchorstyles)((system.windows.forms.anchorstyles.bottom | system.windows.forms.anchorstyles.right)));

this.button3.location = new system.drawing.point(648, 488);

this.button3.name = "button3";

this.button3.tabindex = 3;

this.button3.text = "example7";

this.button3.click += new system.eventhandler(this.button3_click);

//

// button4

//

this.button4.anchor = ((system.windows.forms.anchorstyles)((system.windows.forms.anchorstyles.bottom | system.windows.forms.anchorstyles.left)));

this.button4.location = new system.drawing.point(184, 488);

this.button4.name = "button4";

this.button4.tabindex = 4;

this.button4.text = "example3";

this.button4.click += new system.eventhandler(this.button4_click);

//

// button5

//

this.button5.anchor = ((system.windows.forms.anchorstyles)((system.windows.forms.anchorstyles.bottom | system.windows.forms.anchorstyles.left)));

this.button5.location = new system.drawing.point(272, 488);

this.button5.name = "button5";

this.button5.tabindex = 5;

this.button5.text = "example4";

this.button5.click += new system.eventhandler(this.button5_click);

//

// button6

//

this.button6.anchor = ((system.windows.forms.anchorstyles)((system.windows.forms.anchorstyles.bottom | system.windows.forms.anchorstyles.left)));

this.button6.location = new system.drawing.point(360, 488);

this.button6.name = "button6";

this.button6.tabindex = 6;

this.button6.text = "example5";

this.button6.click += new system.eventhandler(this.button6_click);

//

// button7

//

this.button7.anchor = ((system.windows.forms.anchorstyles)((system.windows.forms.anchorstyles.bottom | system.windows.forms.anchorstyles.left)));

this.button7.location = new system.drawing.point(448, 488);

this.button7.name = "button7";

this.button7.tabindex = 7;

this.button7.text = "example6";

this.button7.click += new system.eventhandler(this.button7_click);

//

// form1

//

this.autoscalebasesize = new system.drawing.size(6, 14);

this.clientsize = new system.drawing.size(728, 517);

this.controls.add(this.button7);

this.controls.add(this.button6);

this.controls.add(this.button5);

this.controls.add(this.button4);

this.controls.add(this.button3);

this.controls.add(this.button2);

this.controls.add(this.button1);

this.controls.add(this.listbox1);

this.name = "form1";

this.text = "xmlreader";

this.resumelayout(false);

//

// xmlpath

//

this.xmlpath = "sample.xml";

}

#endregion

/// ＜summary＞

/// 应用程序的主入口点。

/// ＜/summary＞

[stathread]

static void main()

{

application.run(new form1());

}

private void button1_click(object sender, system.eventargs e)

{

xread = new xmlreader(this.xmlpath,this.listbox1);

try

{

xread.eachxml();

}

catch(xmlexception xmlexp)

{

messagebox.show(xmlexp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

catch(exception exp)

{

messagebox.show(exp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

finally

{

xread.dispose();

}

}

private void button2_click(object sender, system.eventargs e)

{

xread = new xmlreader(this.xmlpath,this.listbox1);

try

{

xread.readxmlbynodetype();

}

catch(xmlexception xmlexp)

{

messagebox.show(xmlexp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

catch(exception exp)

{

messagebox.show(exp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

finally

{

xread.dispose();

}

}

private void button3_click(object sender, system.eventargs e)

{

xmlnodetype[] xmlntype = {xmlnodetype.element, xmlnodetype.endelement, xmlnodetype.xmldeclaration};

xread = new xmlreader(this.xmlpath, this.listbox1);

try

{

xread.filterbynodetype(xmlntype);

}

catch(xmlexception xmlexp)

{

messagebox.show(xmlexp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

catch(exception exp)

{

messagebox.show(exp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

finally

{

xread.dispose();

}

}

private void button4_click(object sender, system.eventargs e)

{

xread = new xmlreader(this.xmlpath, this.listbox1);

try

{

xread.readxmltextvalue();

}

catch(xmlexception xmlexp)

{

messagebox.show(xmlexp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

catch(exception exp)

{

messagebox.show(exp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

finally

{

xread.dispose();

}

}

private void button5_click(object sender, system.eventargs e)

{

xread = new xmlreader(this.xmlpath, this.listbox1);

try

{

xread.readxmlattributes();

}

catch(xmlexception xmlexp)

{

messagebox.show(xmlexp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

catch(exception exp)

{

messagebox.show(exp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

finally

{

xread.dispose();

}

}

private void button6_click(object sender, system.eventargs e)

{

xread = new xmlreader(this.xmlpath, this.listbox1);

try

{

xread.readxmlnamespace();

}

catch(xmlexception xmlexp)

{

messagebox.show(xmlexp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

catch(exception exp)

{

messagebox.show(exp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

finally

{

xread.dispose();

}

}

private void button7_click(object sender, system.eventargs e)

{

xread = new xmlreader(this.xmlpath, this.listbox1);

try

{

xread.readxml();

}

catch(xmlexception xmlexp)

{

messagebox.show(xmlexp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

catch(exception exp)

{

messagebox.show(exp.tostring(),"error",messageboxbuttons.ok,messageboxicon.error);

}

finally

{

xread.dispose();

}

}

}

}

//
//bool xmltextreader.read(): 读取流中下一个节点，当读完最后一个节点再次调用该方法该方法返回false
//xmlnodetype xmltextreader.nodetype: 该属性返回当前节点的类型
// xmlnodetype.element 元素节点
// xmlnodetype.endelement 结尾元素节点
// xmlnodetype.xmldeclaration 文档的第一个节点
// xmlnodetype.text 文本节点
//bool xmltextreader.hasattributes: 当前节点有没有属性，返回true或false
//string xmltextreader.name: 返回当前节点的名称
//string xmltextreader.value: 返回当前节点的值
//string xmltextreader.localname: 返回当前节点的本地名称
//string xmltextreader.namespaceuri: 返回当前节点的命名空间uri
//string xmltextreader.prefix: 返回当前节点的前缀
//bool xmltextreader.movetonextattribute(): 移动到当前节点的下一个属性
//---------------------------------------------------------------------------------------------------

namespace xmlreading
{
using system;
using system.xml;
using system.windows.forms;
using system.componentmodel;

/// ＜summary＞
/// xml文件读取器
/// ＜/summary＞

public class xmlreader : idisposable
{
private string _xmlpath;
private const string _errmsg = "error occurred while reading ";
private listbox _listbox;
private xmltextreader xmltxtrd;

#region xmlreader 的构造器

public xmlreader()
{
this._xmlpath = string.empty;
this._listbox = null;
this.xmltxtrd = null;
}

/// ＜summary＞
/// 构造器
/// ＜/summary＞
/// ＜param name="_xmlpath"＞xml文件绝对路径＜/param＞
/// ＜param name="_listbox"＞列表框用于显示xml＜/param＞

public xmlreader(string _xmlpath, listbox _listbox)
{
this._xmlpath = _xmlpath;
this._listbox = _listbox;
this.xmltxtrd = null;
}

#endregion
#region xmlreader 的资源释放方法

/// ＜summary＞
/// 清理该对象所有正在使用的资源

/// ＜/summary＞

public void dispose()
{
this.dispose(true);
gc.suppressfinalize(this);
}

/// ＜summary＞
/// 释放该对象的实例变量
/// ＜/summary＞
/// ＜param name="disposing"＞＜/param＞

protected virtual void dispose(bool disposing)
{
if (!disposing)
return;
if (this.xmltxtrd != null)
{
this.xmltxtrd.close();
this.xmltxtrd = null;
}

if (this._xmlpath != null)
{
this._xmlpath = null;
}
}

#endregion
#region xmlreader 的属性

/// ＜summary＞
/// 获取或设置列表框用于显示xml
/// ＜/summary＞

public listbox listbox
{
get
{
return this._listbox;
}
set
{
this._listbox = value;
}
}

/// ＜summary＞
/// 获取或设置xml文件的绝对路径
/// ＜/summary＞

public string xmlpath
{
get
{
return this._xmlpath;
}
set
{
this._xmlpath = value;
}
}

#endregion

/// ＜summary＞
/// 遍历xml文件
/// ＜/summary＞

public void eachxml()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
this._listbox.items.add(this.xmltxtrd.value);
}
}
catch(xmlexception exp)
{
throw new xmlexception(_errmsg + this._xmlpath + exp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的节点类型
/// ＜/summary＞

public void readxmlbynodetype()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
this._listbox.items.add(this.xmltxtrd.nodetype.tostring());
}
}
catch(xmlexception exp)
{
throw new xmlexception(_errmsg + this._xmlpath + exp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 根据节点类型过滤xml文档
/// ＜/summary＞
/// ＜param name="xmlntype"＞xmlnodetype 节点类型的数组＜/param＞

public void filterbynodetype(xmlnodetype[] xmlntype)
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);
try
{
while(xmltxtrd.read())
{
for (int i = 0; i ＜ xmlntype.length; i++)
{
if (xmltxtrd.nodetype == xmlntype[i])
{
this._listbox.items.add(xmltxtrd.name + " is type " + xmltxtrd.nodetype.tostring());
}
}
}
}
catch(xmlexception exp)
{
throw new xmlexception(_errmsg + this.xmlpath + exp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的所有文本节点值

/// ＜/summary＞

public void readxmltextvalue()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.text)
{
this._listbox.items.add(xmltxtrd.value);
}
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的属性
/// ＜/summary＞

public void readxmlattributes()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.element)
{
if (xmltxtrd.hasattributes)
{
this._listbox.items.add("the element " + xmltxtrd.name + " has " + xmltxtrd.attributecount + " attributes");

this._listbox.items.add("the attributes are:");

while(xmltxtrd.movetonextattribute())
{
this._listbox.items.add(xmltxtrd.name + " = " + xmltxtrd.value);
}
}
else
{
this._listbox.items.add("the element " + xmltxtrd.name + " has no attribute");
}
this._listbox.items.add("");
}
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取xml文件的命名空间
/// ＜/summary＞

public void readxmlnamespace()
{
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);
try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.element && xmltxtrd.prefix != "")
{
this._listbox.items.add("the prefix " + xmltxtrd.prefix + " is associated with namespace " + xmltxtrd.namespaceuri);

this._listbox.items.add("the element with the local name " + xmltxtrd.localname + " is associated with" + " the namespace " + xmltxtrd.namespaceuri);
}

if (xmltxtrd.nodetype == xmlnodetype.element && xmltxtrd.hasattributes)
{
while(xmltxtrd.movetonextattribute())
{
if (xmltxtrd.prefix != "")
{
this._listbox.items.add("the prefix " + xmltxtrd.prefix + " is associated with namespace " + xmltxtrd.namespaceuri);

this._listbox.items.add("the attribute with the local name " + xmltxtrd.localname + " is associated with the namespace " + xmltxtrd.namespaceuri);

}
}
}
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}

/// ＜summary＞
/// 读取整个xml文件
/// ＜/summary＞

public void readxml()
{
string attandele = string.empty;
this._listbox.items.clear();
this.xmltxtrd = new xmltextreader(this._xmlpath);

try
{
while(xmltxtrd.read())
{
if (xmltxtrd.nodetype == xmlnodetype.xmldeclaration)
this._listbox.items.add(string.format("＜?{0} {1} ?＞",xmltxtrd.name,xmltxtrd.value));
else if (xmltxtrd.nodetype == xmlnodetype.element)
{
attandele = string.format("＜{0} ",xmltxtrd.name);
if (xmltxtrd.hasattributes)
{
while(xmltxtrd.movetonextattribute())
{
attandele = attandele + string.format("{0}='{1}' ",xmltxtrd.name,xmltxtrd.value);
}
}

attandele = attandele.trim() + "＞";
this._listbox.items.add(attandele);
}
else if (xmltxtrd.nodetype == xmlnodetype.endelement)
this._listbox.items.add(string.format("＜/{0}＞",xmltxtrd.name));
else if (xmltxtrd.nodetype == xmlnodetype.text)
this._listbox.items.add(xmltxtrd.value);
}
}
catch(xmlexception xmlexp)
{
throw new xmlexception(_errmsg + this._xmlpath + xmlexp.tostring());
}
finally
{
if (this.xmltxtrd != null)
this.xmltxtrd.close();
}
}
}
}

窗体代码如下：

namespace xmlreading

{

using system;

using system.drawing;

using system.collections;

using system.componentmodel;

using system.windows.forms;

using system.data;

using system.xml;

public class form1 : system.windows.forms.form

{

private system.windows.forms.listbox listbox1;

private system.windows.forms.button button1;

private system.windows.forms.button button2;

private system.windows.forms.button button3;

private system.windows.forms.button button4;

private system.windows.forms.button button5;

private system.windows.forms.button button6;

private system.windows.forms.button button7;

private string xmlpath;

private xmlreader xread;

/// ＜summary＞

/// 必需的设计器变量。

/// ＜/summary＞

private system.componentmodel.container components = null;

public form1()

{

initializecomponent();

}

/// ＜summary＞

/// 清理所有正在使用的资源。

/// ＜/summary＞

protected override void dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.dispose();

}

}

base.dispose( disposing );

}

#region windows 窗体设计器生成的代码

/// ＜summary＞

/// 设计器支持所需的方法 - 不要使用代码编辑器修改

/// 此方法的内容。

/// ＜/summary＞

private void initializecomponent()

{

this.listbox1 = new system.windows.forms.listbox();

this.button1 = new system.windows.forms.button();

this.button2 = new system.windows.forms.button();

this.button3 = new system.windows.forms.button();

this.button4 = new system.windows.forms.button();

this.button5 = new system.windows.forms.button();

this.button6 = new system.windows.forms.button();

this.button7 = new system.windows.forms.button();

this.suspendlayout();

//

// listbox1

//

this.listbox1.anchor = ((system.windows.forms.anchorstyles)((((system.windows.forms.anchorstyles.top | system.windows.forms.anchorstyles.bottom)

| system.windows.forms.anchorstyles.left)

| system.windows.forms.anchorstyles.right)));

this.listbox1.itemheight = 12;

this.list