前几天用WebService写了传数据的接口。
要求是 传XML数据 并用Schema（即xsd文件）验证 并且伴有图片传输。
做这个项目首先要理解
WebService 传数据本身是通过XML格式传的，所传的数据最后都被包装在一个XML里了
基于这点，需要准备以下几个知识点。
1. XML Schema 的编写 （命名空间 ，数据类型，定义属性类型，定义多个相同标签方法）
2.用Xsd验证XML的程序代码
3.将文件以什么形式放到xml里
4.如何从xml里取出文件并保存到本地
ps：我用正则声称XML的时候用1做后向引用不成功，原因是。C#根js一样都用的是类似$1这样引用的，坑爹的教程啊。
好了。我们把几个知识点罗列一下就OK啦。
1.列出XML于XML Schema的样本
a.xml
<?xml version="1.0" encoding="utf-8" ?>
<!---->
<myxml xmlns="http://www.aaa.com">
<!---->
<Type>01</Type>
<!--varchar(50), 附件类型
-->
<Name></Name>
<!--varchar(200),附件名称
-->
<Time></eaTime>
<!--varchar(50),时间
-->
<file fileName=""></file>
<file fileName=""></file>
<!--varbinary 上传文件
-->
</myxml >
a.xsd
<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="EmrAcce"
targetNamespace="http://www.cnstroke.com"
elementFormDefault="qualified"
xmlns="http://www.cnstroke.com"
xmlns:mstns="http://www.cnstroke.com"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
<xs:element name="myxml ">
<xs:complexType>
<xs:sequence>
<xs:element name="Type" type="TypeT"/>
<xs:element name="Name" type="xs:string"/>
<xs:element name="Time" type="xs:dateTime"/>
<xs:element name="file" maxOccurs="unbounded" >
<xs:complexType>
<xs:attribute name="fileName" type="xs:string"></xs:attribute>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:simpleType name="TypeT">
<xs:restriction base="xs:string">
<xs:pattern value="01|02|03|09|10|11|99"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="ClassT">
<xs:restriction base="xs:string">
<xs:pattern value="01|02|03|04|99"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="fileNameT">
<xs:restriction base="xs:string">
<xs:pattern value=".+[.]{1,1}.+"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
2..用Xsd验证XML的程序代码
private void ValidationEventCallBack(Object sender, ValidationEventArgs e)
{
if (e.Severity == XmlSeverityType.Warning)//区分是警告还是错误
{
xmlErr += "<br/>验证成功!警告：" + e.Message;
}
else
{
xmlErr += "<br/>Err:" + e.Message;
}
}
private void CheckXmlValidate(string strRequestXML)
{
string ErrString = string.Empty;
StringReader sRead = null;
XmlReader xmlRead = null;
XmlSchemaSet schemaSet;
try
{
schemaSet = new XmlSchemaSet();
sRead = new StringReader(strRequestXML);
schemaSet.Add(null, AppDomain.CurrentDomain.BaseDirectory + "/XML/" + xsdFile + ".xsd");
XmlReaderSettings settings = new XmlReaderSettings();
settings.ValidationEventHandler += new ValidationEventHandler(this.ValidationEventCallBack);
settings.ValidationType = ValidationType.Schema;
settings.Schemas = schemaSet;
xmlRead = XmlReader.Create(sRead, settings);
// xmlRead = XmlReader.Create(xmlUrl, settings);//此处是通过传路径获取xml
while (xmlRead.Read())
{
}
if (ErrString.ToString() == String.Empty)
{
xmlErr += "验证成功!";
}
else
{
xmlErr += "验证失败！原因可能是：" + ErrString;
}
}
catch (XmlException exec)
{
xmlErr += exec.Message;
}
finally
{
if (xmlRead != null)
{
xmlRead.Close();
}
}
}
3.将文件以什么形式放到xml里
/// <param name="filePath">相对路径</param>
/// <param name="fileName"></param>
protected void setXmlNodeFile(XmlDocument xmldoc, XmlElement xmlelem, string filePath,string fileName)
{
XmlElement file = xmldoc.CreateElement("", "file", "");
file.SetAttribute("fileName",fileName);
string data = null;
int readByte = 0; //
int bytesToRead = 900000;
FileStream fs = new FileStream(Server.MapPath(filePath), FileMode.Open);
bytesToRead = (int)fs.Length;
BinaryReader br = new BinaryReader(fs);
byte[] base64buffer = new byte[bytesToRead];
do
{
readByte = br.Read(base64buffer, 0, bytesToRead); //将数据读入字节数组
// xmlTxtWt.WriteBase64(base64buffer, 0, readByte); //将数组中二进制值编码为Base64并写出到XML文件
} while (bytesToRead <= readByte);
MemoryStream mem = new MemoryStream(base64buffer);
data = Convert.ToBase64String(mem.ToArray());
file.InnerText = data;
xmlelem.AppendChild(file);
}
4.如何从xml里取出文件并保存到本地
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(Server.MapPath("~/XML/ceshi1.xml"));
string PicByte = xmldoc.GetElementsByTagName("file")[0].InnerText;
byte[] b = Convert.FromBase64String(PicByte);
// System.IO.MemoryStream sm = new MemoryStream();
// sm.Write(b, 0, b.Length);
using( FileStream fs = new FileStream(Server.MapPath("~/XML/yts.jpg"), FileMode.Create))
{
fs.Write(b,0,b.Length);
}
return Content("ok");
这样就好了其他细节 就不用说了
-----------------------------------------以下内容摘自网络
1.通过byte传输
把文件转换
public static byte[] ConvertToBinary(string Path)
{
FileStream stream = new FileInfo(Path).OpenRead();
byte[] buffer = new byte[stream.Length];
Console.WriteLine("The lenght of the file is
"+buffer.Length);
stream.Read(buffer, 0, Convert.ToInt32(stream.Length));
return buffer;
}
static byte[] buffer;
buffer = ConvertToBinary(path);
webService
FileStream fstream = new FileStream(filePath + fileName, FileMode.Append);
try
{
//MemoryStream m = new MemoryStream(fileBt);
//m.WriteTo(fstream);
fstream.Write(fileBt, 0,
fileBt.Length);
//二进制转换成文件
fstream.Close();
//rst += "
";
rst += "File Name is:" + fstream.Name + "
";
rst += "File Lenght is:" + fstream.Length + "
";
rst += "File Position is:" + fstream.Position +
"
";
}
catch (Exception ex)
{
//抛出异常信息
rst = ex.ToString();
}
finally
{
fstream.Close();
}