(精华)2020年6月27日 C#类库 DbProviderFactoryHelper(Ado.net数据库封装)

using EFCore.Sharding;
using MySql.Data.MySqlClient;
using Npgsql;
using Oracle.ManagedDataAccess.Client;
using System;
using System.Data.Common;
using System.Data.SqlClient;
using System.Linq;

namespace Core.Util
{
    /// <summary>
    /// 数据库操作提供源工厂帮助类
    /// </summary>
    public class DbProviderFactoryHelper
    {
        #region 外部接口

        /// <summary>
        /// 获取提供工厂
        /// </summary>
        /// <param name="dbType">数据库类型</param>
        /// <returns></returns>
        public static DbProviderFactory GetDbProviderFactory(DatabaseType dbType)
        {
            DbProviderFactory factory = null;
            switch (dbType)
            {
                case DatabaseType.SqlServer: factory = SqlClientFactory.Instance; break;
                case DatabaseType.MySql: factory = MySqlClientFactory.Instance; break;
                case DatabaseType.PostgreSql: factory = NpgsqlFactory.Instance; break;
                case DatabaseType.Oracle: factory = OracleClientFactory.Instance; break;

                default: throw new Exception("请传入有效的数据库！");
            }

            return factory;
        }

        /// <summary>
        /// 获取DbConnection
        /// </summary>
        /// <param name="dbType">数据库类型</param>
        /// <returns></returns>
        public static DbConnection GetDbConnection(DatabaseType dbType)
        {
            var con = GetDbProviderFactory(dbType).CreateConnection();

            return con;
        }

        /// <summary>
        /// 获取DbCommand
        /// </summary>
        /// <param name="dbType">数据库类型</param>
        /// <returns></returns>
        public static DbCommand GetDbCommand(DatabaseType dbType)
        {
            return GetDbProviderFactory(dbType).CreateCommand();
        }

        /// <summary>
        /// 获取DbParameter
        /// </summary>
        /// <param name="dbType">数据库类型</param>
        /// <returns></returns>
        public static DbParameter GetDbParameter(DatabaseType dbType)
        {
            return GetDbProviderFactory(dbType).CreateParameter();
        }

        /// <summary>
        /// 获取DataAdapter
        /// </summary>
        /// <param name="dbType">数据库类型</param>
        /// <returns></returns>
        public static DataAdapter GetDataAdapter(DatabaseType dbType)
        {
            return GetDbProviderFactory(dbType).CreateDataAdapter();
        }

        /// <summary>
        /// 将数据库类型字符串转换为对应的数据库类型
        /// </summary>
        /// <param name="dbTypeStr">数据库类型字符串</param>
        /// <returns></returns>
        public static DatabaseType DbTypeStrToDbType(string dbTypeStr)
        {
            if (dbTypeStr.IsNullOrEmpty())
                throw new Exception("请输入数据库类型字符串！");
            else
            {
                switch (dbTypeStr.ToLower())
                {
                    case "sqlserver": return DatabaseType.SqlServer;
                    case "mysql": return DatabaseType.MySql;
                    case "oracle": return DatabaseType.Oracle;
                    case "postgresql": return DatabaseType.PostgreSql;
                    default: throw new Exception("请输入合法的数据库类型字符串！");
                }
            }
        }

        /// <summary>
        /// 将数据库类型转换为对应的数据库类型字符串
        /// </summary>
        /// <returns></returns>
        public static string DbTypeToDbTypeStr(DatabaseType dbType)
        {
            if (dbType.IsNullOrEmpty())
                throw new Exception("请输入数据库类型！");
            else
            {
                switch (dbType)
                {
                    case DatabaseType.SqlServer: return "SqlServer";
                    case DatabaseType.MySql: return "MySql";
                    case DatabaseType.Oracle: return "Oracle";
                    case DatabaseType.PostgreSql: return "PostgreSql";
                    default: throw new Exception("请输入合法的数据库类型！");
                }
            }
        }

        #endregion
    }
}

  
 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
  
27
  
28
  
29
  
30
  
31
  
32
  
33
  
34
  
35
  
36
  
37
  
38
  
39
  
40
  
41
  
42
  
43
  
44
  
45
  
46
  
47
  
48
  
49
  
50
  
51
  
52
  
53
  
54
  
55
  
56
  
57
  
58
  
59
  
60
  
61
  
62
  
63
  
64
  
65
  
66
  
67
  
68
  
69
  
70
  
71
  
72
  
73
  
74
  
75
  
76
  
77
  
78
  
79
  
80
  
81
  
82
  
83
  
84
  
85
  
86
  
87
  
88
  
89
  
90
  
91
  
92
  
93
  
94
  
95
  
96
  
97
  
98
  
99
  
100
  
101
  
102
  
103
  
104
  
105
  
106
  
107
  
108
  
109
  
110
  
111
  
112
  
113
  
114
  
115
  
116
  
117
  
118
  
119
  
120
  
121
  
122
  
123
  
124
  
125
  
126
  
127
 

文章来源: codeboy.blog.csdn.net，作者：愚公搬代码，版权归原作者所有，如需转载，请联系作者。

原文链接：codeboy.blog.csdn.net/article/details/106980137