C# 组态王

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.Runtime.InteropServices;
namespace kingview
{
public partial class Form1 : Form
{
/// <summary>
/// 与组态王建立连接
/// 每次应用程序启动时，必须用该函数与组态王建立连接
/// </summary>
/// <param name="node">node为节点(IP)，如果是本机，其值为空</param>
/// <returns>返回错误码，见附录。</returns>
[DllImport("kingvewcliend.dll")]
public static extern int StartCliend(string node);

/// <summary>
/// 得到组态王SDK中列出的项目（包括变量及其域）总数
/// </summary>
[DllImport("kingvewcliend.dll")]
public static extern int ReadItemNo();

/// <summary>
/// 得到某个项目的名称
/// <param name="sName">将返回组态王的项目的名称</param>
/// <param name="wItemId">为用户写入的其要取的变量的索引号，其为ReadItemNo返回的范围内的某个数</param>
/// <returns>返回错误码，见附录</returns>
/// </summary>
[DllImport("kingvewcliend.dll")]
//[SecurityPermission(SecurityAction.Assert, Unrestricted = true)]

public static extern int GetItemNames(StringBuilder sName, int wItemId);

/// <summary>
/// 将某个项目添加到采集列中
/// <param name="sRegName">是要加入采集的项目名</param>
/// <param name="TagId">TagId项目采集的标识号</param>
/// <param name="TagDataType">项目的数据类型</param>
/// <returns>返回错误码，见附录</returns>
/// </summary>
[DllImport("kingvewcliend.dll")]
public static extern int AddTag(string sRegName, ref int TagId, ref int TagDataType);

/// <summary>
/// 向某个项目中有应用程序向组态王方向写数据
/// </summary>
/// <param name="TagId">为要采集项目的标识号</param>
/// <param name="bVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <param name="lVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <param name="fVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <param name="sVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <returns>返回错误码,见附录</returns>
[DllImport("kingvewcliend.dll")]
public static extern int WriteTag(ushort TagId, bool bVal, long lVal, float fVal, ref char sVal);

/// <summary>
/// 从组态王中读某个项目的数据
/// </summary>
/// <param name="TagId">要采集的变量的表示号</param>
/// <param name="bVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <param name="lVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <param name="fVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <param name="sVal">bVal、lVal、fVal、sVal为设定的数值，用户将根据变量的类型设定数值</param>
/// <returns>返回错误码,见附录</returns>
[DllImport("kingvewcliend.dll")]
public static extern int ReadTag(int TagId, ref bool bVal, ref long lVal, ref Single fVal, StringBuilder sVal);

/// <summary>
/// 断开与组态王OPC的连接
/// </summary>
/// <returns>返回错误码,见附录</returns>
[DllImport("kingvewcliend.dll")]
public static extern int StopCliend();

// 错误码含义
//0
//连接成功
//-1
//OPC SERVER已经被非法关闭
//-2
//找不到OPC SERVER的PROGID
//-3
//连接OPC SERVER不成功
//-4
//枚举ITEMS错误
//-5
//OPC SERVER没有定义ITEMS
//-6
//内存分配错误
//-7
//在向GROUP中加入ITEMS时出现错误
//-8
//未使用
//-9
//读ITEMS时出现错误
//-10
//不能识别的数据类型
//-11
//读ITEMS的质量戳时出现错误
//-12
//向ITEMS中写入数据时出现错误
//-13
//用户添加变量的变量名错误
//-14
//用户读取的变量序号越界

public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
Console.WriteLine("连接到本地服务器···");
StartCliend("");
Console.WriteLine("得到项的个数");
int itemCount = ReadItemNo();
Console.WriteLine("得到项的个数为："+itemCount.ToString());
StringBuilder regname = new StringBuilder(256);
string[] name = new string[itemCount];
Console.WriteLine("得到所有的Item····");
for (int i = 0; i < itemCount - 1; i++)
{
GetItemNames(regname, i);
name[i] = regname.ToString();
}
Console.WriteLine("输出所有的Item····");
for (int i = 0; i < itemCount - 1; i++)
{
Console.WriteLine(name[i].ToString());
}

int[] tagId =new int[itemCount];
int[] tagType =new int[itemCount];
Console.WriteLine("开始将要监控的Item添加····");
for (int i = 0; i < itemCount - 1; i++)
{
AddTag(name[i].ToString(), ref tagId[i], ref tagType[i]);
}

bool[] bVal = new bool[itemCount];
long[] lVal = new long[itemCount];
Single[] fVal = new Single[itemCount];
StringBuilder sVal =new StringBuilder(255);
string[] sValString = new string[itemCount];
Console.WriteLine("开始读取数据····");
for (int x = 1; x <5; x++)
{
Console.WriteLine("第"+x.ToString()+"次读取数据：");
for (int i = 0; i < itemCount - 1; i++)
{
ReadTag(tagId[i], ref bVal[i], ref lVal[i], ref fVal[i], sVal);
sValString[i] = sVal.ToString();
Console.WriteLine("item:" + name[i].ToString() + "值：" + sValString[i].ToString());
}
}
}

}
}

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