using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

using System.Data;
using System.Data.OracleClient;
using System.IO;

using System.IO.Compression;
using System.Runtime.Serialization.Formatters.Binary;
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
private OracleConnection webConnection;
DataTable curDt = new DataTable();
DataSet curSet = new DataSet();
OracleDataAdapter curDa = new OracleDataAdapter();
OracleCommand curComm = new OracleCommand();

private string GetCurCnnStr()
{
//连接数据库并打开
OracleConnectionStringBuilder cnnStrBuilder = new OracleConnectionStringBuilder();
cnnStrBuilder.UserID = "";
cnnStrBuilder.Password = "";
cnnStrBuilder.DataSource = "";
return cnnStrBuilder.ConnectionString;
}
public Service()
{

//如果使用设计的组件，请取消注释以下行
//InitializeComponent();
}

[WebMethod(Description = "判断空值")]
private OracleParameter CreateParam(string ParamName, object ParamValue)
{
OracleParameter Result = new OracleParameter();
Result.ParameterName = ParamName;
if (ParamValue != null)
{
Result.Value = ParamValue;
}
else
{
Result.Value = DBNull.Value;
}

return Result;
}

[WebMethod(Description = "测试连接")]
public string Linking()
{
return "WebService连接成功！";
}


[WebMethod(Description = "查询信息")]
public byte[] Search(string img)
{
try
{
webConnection = new OracleConnection(GetCurCnnStr());
webConnection.Open();
//查询表中的所有的数据
OracleDataAdapter webAdapter = new OracleDataAdapter("select pic from pic where id=" + img, webConnection);
DataSet webDataTable = new DataSet();
//byte[] webDataTable = new byte[0];
webAdapter.Fill(webDataTable);
webConnection.Close();

//序列化为二进制
webDataTable.RemotingFormat = SerializationFormat.Binary;//确定序列化格式
BinaryFormatter bFormatter = new BinaryFormatter();
MemoryStream mStream = new MemoryStream();
bFormatter.Serialize(mStream, webDataTable);
byte[] bytes = mStream.ToArray();//将数据流写入字节数组
//返回数组
return bytes;

}
catch (Exception)
{
curComm.Transaction.Rollback();
return null;
}
finally
{

webConnection.Close();
}

}

[WebMethod(Description = "添加信息")]
public void Add(string id, byte[] Image)
{
try
{
webConnection = new OracleConnection(GetCurCnnStr());
curComm.Connection = webConnection;
webConnection.Open();
curComm.Transaction = webConnection.BeginTransaction();
curComm.CommandText = "insert into pic(id,pic)values(:pId,:pPic)";
curComm.Parameters.Add(CreateParam("pId", (id != null) ? id : null));
curComm.Parameters.Add(CreateParam("pPic", (Image != null) ? Image : null));

curComm.ExecuteNonQuery();
curComm.Transaction.Commit();


}
catch (Exception)
{
curComm.Transaction.Rollback();
}
finally
{
webConnection.Close();
}
}



}

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