[2028]<feature> add C# connector for windows

cmake/install.inc

@@ -13,6 +13,7 @@ ELSEIF (TD_WINDOWS)
   INSTALL(DIRECTORY ${TD_COMMUNITY_DIR}/src/connector/go     DESTINATION connector)
   INSTALL(DIRECTORY ${TD_COMMUNITY_DIR}/src/connector/nodejs DESTINATION connector)
   INSTALL(DIRECTORY ${TD_COMMUNITY_DIR}/src/connector/python DESTINATION connector)
+  INSTALL(DIRECTORY ${TD_COMMUNITY_DIR}/src/connector/C# DESTINATION connector)
   INSTALL(DIRECTORY ${TD_COMMUNITY_DIR}/tests/examples DESTINATION .)
   INSTALL(DIRECTORY ${TD_COMMUNITY_DIR}/packaging/cfg DESTINATION .)
   INSTALL(FILES ${TD_COMMUNITY_DIR}/src/inc/taos.h DESTINATION include)

src/connector/C#/TDengineDriver.cs

+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace TDengineDriver
+{
+  enum TDengineDataType {
+    TSDB_DATA_TYPE_NULL = 0,     // 1 bytes
+    TSDB_DATA_TYPE_BOOL = 1,     // 1 bytes
+    TSDB_DATA_TYPE_TINYINT = 2,  // 1 bytes
+    TSDB_DATA_TYPE_SMALLINT = 3, // 2 bytes
+    TSDB_DATA_TYPE_INT = 4,      // 4 bytes
+    TSDB_DATA_TYPE_BIGINT = 5,   // 8 bytes
+    TSDB_DATA_TYPE_FLOAT = 6,    // 4 bytes
+    TSDB_DATA_TYPE_DOUBLE = 7,   // 8 bytes
+    TSDB_DATA_TYPE_BINARY = 8,   // string
+    TSDB_DATA_TYPE_TIMESTAMP = 9,// 8 bytes
+    TSDB_DATA_TYPE_NCHAR = 10    // unicode string
+  }
+
+  enum TDengineInitOption
+  {
+    TSDB_OPTION_LOCALE = 0,
+    TSDB_OPTION_CHARSET = 1,
+    TSDB_OPTION_TIMEZONE = 2,
+    TDDB_OPTION_CONFIGDIR = 3,
+    TDDB_OPTION_SHELL_ACTIVITY_TIMER = 4
+  }
+
+  class TDengineMeta
+  {
+    public string name;
+    public short size;
+    public byte type;
+    public string TypeName()
+    {
+      switch ((TDengineDataType)type)
+      {
+        case TDengineDataType.TSDB_DATA_TYPE_BOOL:
+          return "BOOLEAN";
+        case TDengineDataType.TSDB_DATA_TYPE_TINYINT:
+          return "BYTE";
+        case TDengineDataType.TSDB_DATA_TYPE_SMALLINT:
+          return "SHORT";
+        case TDengineDataType.TSDB_DATA_TYPE_INT:
+          return "INT";
+        case TDengineDataType.TSDB_DATA_TYPE_BIGINT:
+          return "LONG";
+        case TDengineDataType.TSDB_DATA_TYPE_FLOAT:
+          return "FLOAT";
+        case TDengineDataType.TSDB_DATA_TYPE_DOUBLE:
+          return "DOUBLE";
+        case TDengineDataType.TSDB_DATA_TYPE_BINARY:
+          return "STRING";
+        case TDengineDataType.TSDB_DATA_TYPE_TIMESTAMP:
+          return "TIMESTAMP";
+        case TDengineDataType.TSDB_DATA_TYPE_NCHAR:
+          return "NCHAR";
+        default:
+          return "undefine";
+      }
+    }
+  }
+
+  class TDengine
+  {
+    public const int TSDB_CODE_SUCCESS = 0;
+
+    [DllImport("taos.dll", EntryPoint = "taos_init", CallingConvention = CallingConvention.Cdecl)]
+    static extern public void Init();
+
+    [DllImport("taos.dll", EntryPoint = "taos_cleanup", CallingConvention = CallingConvention.Cdecl)]
+    static extern public void Cleanup();
+
+    [DllImport("taos.dll", EntryPoint = "taos_options", CallingConvention = CallingConvention.Cdecl)]
+    static extern public void Options(int option, string value);
+
+    [DllImport("taos.dll", EntryPoint = "taos_connect", CallingConvention = CallingConvention.Cdecl)]
+    static extern public IntPtr Connect(string ip, string user, string password, string db, short port);
+
+    [DllImport("taos.dll", EntryPoint = "taos_errstr", CallingConvention = CallingConvention.Cdecl)]
+    static extern private IntPtr taos_errstr(IntPtr res);
+    static public string Error(IntPtr res)
+    {
+      IntPtr errPtr = taos_errstr(res);
+      return Marshal.PtrToStringAnsi(errPtr);
+    }
+
+    [DllImport("taos.dll", EntryPoint = "taos_errno", CallingConvention = CallingConvention.Cdecl)]
+    static extern public int ErrorNo(IntPtr res);
+
+    [DllImport("taos.dll", EntryPoint = "taos_query", CallingConvention = CallingConvention.Cdecl)]
+    static extern public IntPtr Query(IntPtr conn, string sqlstr);
+
+    [DllImport("taos.dll", EntryPoint = "taos_affected_rows", CallingConvention = CallingConvention.Cdecl)]
+    static extern public int AffectRows(IntPtr res);
+
+    [DllImport("taos.dll", EntryPoint = "taos_field_count", CallingConvention = CallingConvention.Cdecl)]
+    static extern public int FieldCount(IntPtr res);
+
+    [DllImport("taos.dll", EntryPoint = "taos_fetch_fields", CallingConvention = CallingConvention.Cdecl)]
+    static extern private IntPtr taos_fetch_fields(IntPtr res);
+    static public List<TDengineMeta> FetchFields(IntPtr res)
+    {
+      const int fieldSize = 68;
+
+      List<TDengineMeta> metas = new List<TDengineMeta>();
+      if (res == IntPtr.Zero)
+      {
+        return metas;
+      }
+
+      int fieldCount = FieldCount(res);
+      IntPtr fieldsPtr = taos_fetch_fields(res);
+  
+      for (int i = 0; i < fieldCount; ++i)
+      {
+        int offset = i * fieldSize;
+        
+        TDengineMeta meta = new TDengineMeta();
+        meta.name = Marshal.PtrToStringAnsi(fieldsPtr + offset);
+        meta.type = Marshal.ReadByte(fieldsPtr + offset + 65);
+        meta.size = Marshal.ReadInt16(fieldsPtr + offset + 66);
+        metas.Add(meta);
+      }
+
+      return metas;
+    }
+
+    [DllImport("taos.dll", EntryPoint = "taos_fetch_row", CallingConvention = CallingConvention.Cdecl)]
+    static extern public IntPtr FetchRows(IntPtr res);
+
+    [DllImport("taos.dll", EntryPoint = "taos_free_result", CallingConvention = CallingConvention.Cdecl)]
+    static extern public IntPtr FreeResult(IntPtr res);
+
+    [DllImport("taos.dll", EntryPoint = "taos_close", CallingConvention = CallingConvention.Cdecl)]
+    static extern public int Close(IntPtr taos);
+  }
+}
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