基于C#的PISDK研究，代码

2023-05-14 09:53•java•阅读 216

本篇文章主要利用PISDK从PI服务器取数，介绍多种取数方法。

首先需要一些基础的代码，比如获取PI服务的：

/// <summary>

/// 获取PI服务/// </summary>

/// <param name="servername">//UID=PIUser;PWD=PIUserPassWord

</param>

/// <returns></returns>

privateServer GetServer(stringservername)

{

try

{

if(!string.IsNullOrEmpty(servername))

{

//采用认证方式登录

server = pi.Servers[servername];

server.Open(connStr);

}

else

{

//采用默认方式登录

server = pi.Servers.DefaultServer;

server.Open();

}

if(server.Connected)

{

returnserver;

}

else

{

returnnull;

}

catch(Exception ex)

{

MessageBox.Show(ex.Message);

returnnull;

}

　　还有到PI服务器中找点的方法：

/// <summary>

/// 搜索PI中对应的数据点

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="condition">选择tag的条件</param>

/// <returns></returns>

privatePointList SearchPIPoints(Server server, String condition)

{

returnserver.GetPoints(condition);

}

下面介绍取数方法：

1. 取得单个tag快照值

/// <summary>

/// 取得单个tag快照值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringGetSingleSnap(Server server,stringtag)

{

stringoutput=string.Empty;

PIPoints piPoints = server.PIPoints;

//采用标签名称的方式取得对象

PIPoint piPoint = piPoints[tag];

//调用方法取得快照值

PIValue piValue = piPoint.Data.Snapshot;

//取到该快照值时PI服务器时间

PITimeServer.PITime piTime = piValue.TimeStamp;

output = piTime.LocalDate.ToString() +" "+ piValue.Value + Environment.NewLine;

returnoutput;

}

　　2. 取得单个tag一段时间内的历史值

/// <summary>

/// 取得单个tag段时间内的历史值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringGetSingleHistory(Server server,stringtag)

{

stringoutput =string.Empty;

PIPoints piPoints = server.PIPoints;

PIPoint piPoint = piPoints[tag];

//取得分钟前到当前时间的历史值

PIValues piValues = piPoint.Data.RecordedValues(DateTime.Now.AddMinutes(-5).ToString(),

DateTime.Now.ToString());

foreach(PIValue piValueinpiValues)

{

PITimeServer.PITime piTime = piValue.TimeStamp;//PI时间

output += piTime.LocalDate.ToString() +" "+ piValue.Value + Environment.NewLine;

}

returnoutput;

}

　　3. 取得多个tag快照值

/// <summary>

/// 取得多个tag取快照值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag值(tag='' or tag='')</param>

/// <returns></returns>

privatestringMultipleSnap(Server server,stringtag)

{

stringoutput =string.Empty;

//取tag

PointList ptlist = SearchPIPoints(server, tag);

PISDKCommon.NamedValues nvErrs =newPISDKCommon.NamedValues();

PointValues ptvalues = ptlist.Data.get_Snapshot(outnvErrs);

foreach(PointValue myValueinptvalues)

{

PITimeServer.PITime piTime = myValue.PIValue.TimeStamp;//PI时间

if(myValue.PIValue.Value.GetType().IsCOMObject)

{

//状态值

DigitalState myDigState = (DigitalState)myValue.PIValue.Value;

output += myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ myDigState.Name + Environment.NewLine;

}

else

{

//模拟值

output += myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ Convert.ToString(Math.Round(double.Parse(Convert.ToString(myValue.PIValue.Value)), 2)) + Environment.NewLine;

}

returnoutput;

}

　　4. 取得多个tag一段历史时间所有值

/// <summary>

/// 取得多个tag段历史时间所有值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringMultipleHistory1(Server server,stringtag)

{

stringoutput =string.Empty;

PointList ptlist = SearchPIPoints(server, tag);

stringoutPut =string.Empty;

PISDKCommon.NamedValues nvErrs =newPISDKCommon.NamedValues();

foreach(PIPoint piPointinptlist)

{

//获取5分钟前到当前时间的历史值

PIValues piValues = piPoint.Data.RecordedValues(DateTime.Now.AddMinutes(-5).ToString(),

DateTime.Now.ToString());

foreach(PIValue piValueinpiValues)

{

PITimeServer.PITime piTime = piValue.TimeStamp;//PI时间

output+= piPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ piValue.Value + Environment.NewLine;

}

returnoutput;

}

　　5. 取得多个tag历史时刻值

/// <summary>

/// 取得多个tag段历史时间点值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringMultipleHistory2(Server server,stringtag)

{

stringoutput =string.Empty;

PointList ptlist = SearchPIPoints(server, tag);

PISDKCommon.NamedValues nvErrs =newPISDKCommon.NamedValues();

PITimeServer.PITimeFormat piTime1 =newPITimeServer.PITimeFormat();

piTime1.InputString ="*-2h";//or "2012-2-2 2:2:2"

//获取两小时前的时刻值

PointValues ptvalues = ptlist.Data.ArcValue(piTime1, RetrievalTypeConstants.rtAuto,outnvErrs);

foreach(PointValue myValueinptvalues)

{

PITimeServer.PITime piTime = myValue.PIValue.TimeStamp;//PI时间

if(myValue.PIValue.Value.GetType().IsCOMObject)

{

//状态值

DigitalState myDigState = (DigitalState)myValue.PIValue.Value;

output+= myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ myDigState.Name + Environment.NewLine;

}

else

{

//模拟值

output+= myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ Convert.ToString(Math.Round(double.Parse(Convert.ToString(myValue.PIValue.Value)), 2)) + Environment.NewLine;

}

returnoutput;

}

转载自：https://www.cnblogs.com/Johnny_Z/p/3234849.html

首先需要一些基础的代码，比如获取PI服务的：

/// <summary>

/// 获取PI服务/// </summary>

/// <param name="servername">//UID=PIUser;PWD=PIUserPassWord

</param>

/// <returns></returns>

privateServer GetServer(stringservername)

{

try

{

if(!string.IsNullOrEmpty(servername))

{

//采用认证方式登录

server = pi.Servers[servername];

server.Open(connStr);

}

else

{

//采用默认方式登录

server = pi.Servers.DefaultServer;

server.Open();

}

if(server.Connected)

{

returnserver;

}

else

{

returnnull;

}

catch(Exception ex)

{

MessageBox.Show(ex.Message);

returnnull;

}

　　还有到PI服务器中找点的方法：

/// <summary>

/// 搜索PI中对应的数据点

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="condition">选择tag的条件</param>

/// <returns></returns>

privatePointList SearchPIPoints(Server server, String condition)

{

returnserver.GetPoints(condition);

}

下面介绍取数方法：

1. 取得单个tag快照值

/// <summary>

/// 取得单个tag快照值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringGetSingleSnap(Server server,stringtag)

{

stringoutput=string.Empty;

PIPoints piPoints = server.PIPoints;

//采用标签名称的方式取得对象

PIPoint piPoint = piPoints[tag];

//调用方法取得快照值

PIValue piValue = piPoint.Data.Snapshot;

//取到该快照值时PI服务器时间

PITimeServer.PITime piTime = piValue.TimeStamp;

output = piTime.LocalDate.ToString() +" "+ piValue.Value + Environment.NewLine;

returnoutput;

}

　　2. 取得单个tag一段时间内的历史值

/// <summary>

/// 取得单个tag段时间内的历史值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringGetSingleHistory(Server server,stringtag)

{

stringoutput =string.Empty;

PIPoints piPoints = server.PIPoints;

PIPoint piPoint = piPoints[tag];

//取得分钟前到当前时间的历史值

PIValues piValues = piPoint.Data.RecordedValues(DateTime.Now.AddMinutes(-5).ToString(),

DateTime.Now.ToString());

foreach(PIValue piValueinpiValues)

{

PITimeServer.PITime piTime = piValue.TimeStamp;//PI时间

output += piTime.LocalDate.ToString() +" "+ piValue.Value + Environment.NewLine;

}

returnoutput;

}

　　3. 取得多个tag快照值

/// <summary>

/// 取得多个tag取快照值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag值(tag='' or tag='')</param>

/// <returns></returns>

privatestringMultipleSnap(Server server,stringtag)

{

stringoutput =string.Empty;

//取tag

PointList ptlist = SearchPIPoints(server, tag);

PISDKCommon.NamedValues nvErrs =newPISDKCommon.NamedValues();

PointValues ptvalues = ptlist.Data.get_Snapshot(outnvErrs);

foreach(PointValue myValueinptvalues)

{

PITimeServer.PITime piTime = myValue.PIValue.TimeStamp;//PI时间

if(myValue.PIValue.Value.GetType().IsCOMObject)

{

//状态值

DigitalState myDigState = (DigitalState)myValue.PIValue.Value;

output += myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ myDigState.Name + Environment.NewLine;

}

else

{

//模拟值

output += myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ Convert.ToString(Math.Round(double.Parse(Convert.ToString(myValue.PIValue.Value)), 2)) + Environment.NewLine;

}

returnoutput;

}

　　4. 取得多个tag一段历史时间所有值

/// <summary>

/// 取得多个tag段历史时间所有值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringMultipleHistory1(Server server,stringtag)

{

stringoutput =string.Empty;

PointList ptlist = SearchPIPoints(server, tag);

stringoutPut =string.Empty;

PISDKCommon.NamedValues nvErrs =newPISDKCommon.NamedValues();

foreach(PIPoint piPointinptlist)

{

//获取5分钟前到当前时间的历史值

PIValues piValues = piPoint.Data.RecordedValues(DateTime.Now.AddMinutes(-5).ToString(),

DateTime.Now.ToString());

foreach(PIValue piValueinpiValues)

{

PITimeServer.PITime piTime = piValue.TimeStamp;//PI时间

output+= piPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ piValue.Value + Environment.NewLine;

}

returnoutput;

}

　　5. 取得多个tag历史时刻值

/// <summary>

/// 取得多个tag段历史时间点值

/// </summary>

/// <param name="server">PI服务对象</param>

/// <param name="tag">tag名称</param>

/// <returns></returns>

privatestringMultipleHistory2(Server server,stringtag)

{

stringoutput =string.Empty;

PointList ptlist = SearchPIPoints(server, tag);

PISDKCommon.NamedValues nvErrs =newPISDKCommon.NamedValues();

PITimeServer.PITimeFormat piTime1 =newPITimeServer.PITimeFormat();

piTime1.InputString ="*-2h";//or "2012-2-2 2:2:2"

//获取两小时前的时刻值

PointValues ptvalues = ptlist.Data.ArcValue(piTime1, RetrievalTypeConstants.rtAuto,outnvErrs);

foreach(PointValue myValueinptvalues)

{

PITimeServer.PITime piTime = myValue.PIValue.TimeStamp;//PI时间

if(myValue.PIValue.Value.GetType().IsCOMObject)

{

//状态值

DigitalState myDigState = (DigitalState)myValue.PIValue.Value;

output+= myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ myDigState.Name + Environment.NewLine;

}

else

{

//模拟值

output+= myValue.PIPoint.Name +" "+ piTime.LocalDate.ToString() +" "+ Convert.ToString(Math.Round(double.Parse(Convert.ToString(myValue.PIValue.Value)), 2)) + Environment.NewLine;

}

returnoutput;

}

转载自：https://www.cnblogs.com/Johnny_Z/p/3234849.html

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基于C#的PISDK研究，代码

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