197 lines
6.8 KiB
C#
197 lines
6.8 KiB
C#
using CYQ.Data.Table;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.Common;
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using System.IO;
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using System.Text;
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namespace CYQ.Data
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{
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internal sealed class NoSqlConnection : DbConnection
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{
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public NoSqlConnection(string conn)
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{
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_Conn = conn;
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}
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protected override DbCommand CreateDbCommand()
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{
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return null;
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}
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protected override DbTransaction BeginDbTransaction(IsolationLevel isolationLevel)
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{
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return null;
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}
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public override void ChangeDatabase(string databaseName)
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{
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//
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}
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public override void Close()
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{
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//重新写回数据。
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}
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private string _Conn;
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public override string ConnectionString
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{
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get
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{
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return _Conn;
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}
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set
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{
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_Conn = value;
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}
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}
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private string filePath;
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public override string DataSource
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{
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get
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{
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if (string.IsNullOrEmpty(filePath))
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{
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filePath = GetFilePath(_Conn);
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}
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return filePath;
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}
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}
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private string folderName;
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public override string Database
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{
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get
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{
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if (string.IsNullOrEmpty(folderName))
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{
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folderName = DataSource.Replace("/", "\\").TrimEnd('\\');
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folderName = folderName.Substring(folderName.LastIndexOf('\\') + 1);
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}
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return folderName;
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}
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}
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public override void Open()
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{
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if (!Directory.Exists(DataSource))
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{
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Error.Throw("Error for this directory:" + DataSource);
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}
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}
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public override string ServerVersion
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{
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get
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{
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return "CYQ.Data.NoSql";
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}
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}
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public override ConnectionState State
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{
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get
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{
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return ConnectionState.Closed;
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}
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}
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public override DataTable GetSchema(string collectionName, string[] restrictionValues)
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{
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DataTable dt = new DataTable(collectionName);
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dt.Columns.Add("TABLE_NAME");
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switch (collectionName.ToLower())
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{
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case "tables":
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string[] tsList = Directory.GetFiles(DataSource, "*.ts", SearchOption.TopDirectoryOnly);
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if (tsList != null && tsList.Length > 0)
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{
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string dalType = ".txt";
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if (restrictionValues != null && restrictionValues.Length > 0)
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{
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if (restrictionValues[0] != null && Convert.ToString(restrictionValues[0]).ToLower() == "xml")
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{
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dalType = ".xml";
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}
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}
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DataRow row = null;
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string tName = string.Empty;
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foreach (string tsName in tsList)
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{
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tName = Path.GetFileNameWithoutExtension(tsName);//获得表名。
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string[] tableList = Directory.GetFiles(DataSource, tName + ".*", SearchOption.TopDirectoryOnly);
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foreach (string tableName in tableList)
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{
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if (tableName.EndsWith(dalType))
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{
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continue;
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}
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row = dt.NewRow();
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row[0] = tableName.EndsWith(".ts") ? Path.GetFileNameWithoutExtension(tableName) : Path.GetFileName(tableName);
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dt.Rows.Add(row);
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}
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}
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}
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break;
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case "columns":
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dt.Columns.Add("COLUMN_NAME");
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dt.Columns.Add("COLUMN_LCID", typeof(int));
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dt.Columns.Add("DATA_TYPE", typeof(int));
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dt.Columns.Add("TABLE_MaxSize", typeof(int));
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dt.Columns.Add("COLUMN_ISREADONLY", typeof(bool));
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dt.Columns.Add("TABLE_ISCANNULL", typeof(bool));
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dt.Columns.Add("COLUMN_DEFAULT");
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tsList = Directory.GetFiles(DataSource, "*.ts");
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if (tsList != null && tsList.Length > 0)
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{
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DataRow row = null;
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string tName = string.Empty;
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foreach (string tsName in tsList)
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{
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MDataColumn mdc = MDataColumn.CreateFrom(tsName);
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if (mdc.Count > 0)
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{
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tName = Path.GetFileNameWithoutExtension(tsName);
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MCellStruct cs = null;
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for (int i = 0; i < mdc.Count; i++)
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{
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cs = mdc[i];
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row = dt.NewRow();
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row[0] = tName;
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row[1] = cs.ColumnName;
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row[2] = i;
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row[3] = (int)cs.SqlType;
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row[4] = cs.MaxSize;
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row[5] = cs.IsAutoIncrement;
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row[6] = cs.IsCanNull;
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row[7] = Convert.ToString(cs.DefaultValue);
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dt.Rows.Add(row);
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}
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}
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}
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}
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break;
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}
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return dt;
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}
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internal static string GetFilePath(string conn)
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{
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if (conn.IndexOf("{0}") > -1)
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{
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conn = string.Format(conn, AppConfig.WebRootPath);//链接相关的用WebRootPath，支持ASPNETCore
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}
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int start = conn.IndexOf('=') + 1;//1=2;3 -- 1
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int end = conn.IndexOf(";");//3
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string filePath = conn.Substring(start, end > 0 ? end - start : conn.Length - start);
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if (!Directory.Exists(filePath))
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{
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Directory.CreateDirectory(filePath);//
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}
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if (!filePath.EndsWith("\\"))
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{
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filePath = filePath.TrimEnd('/') + "\\";
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}
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return filePath;
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}
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}
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}
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