将数据库表导出为C#实体对象

数据库方式

use 数据库;


declare @TableName sysname = '表名'
declare @Result varchar(max) = '
/// 

///  ' +  @TableName +

'
/// 
public class ' + @TableName + '
{'

select @Result = @Result + '
    /// 

    /// ' +  CONVERT(NVARCHAR(500), ISNULL(ColName, '无')) +

'
    /// 
    public ' + ColumnType + NullableSign + ' ' + ColumnName + ' { get; set; }
'
from
(
    SELECT
        replace(col.name, ' ', '_') ColumnName,
        column_id ColumnId,
        prop.value ColName,
        case typ.name
            when 'bigint' then 'long'
            when 'binary' then 'byte[]'
            when 'bit' then 'bool'
            when 'char' then 'string'
            when 'date' then 'DateTime'
            when 'datetime' then 'DateTime'
            when 'datetime2' then 'DateTime'
            when 'datetimeoffset' then 'DateTimeOffset'
            when 'decimal' then 'decimal'
            when 'float' then 'float'
            when 'image' then 'byte[]'
            when 'int' then 'int'
            when 'money' then 'decimal'
            when 'nchar' then 'char'
            when 'ntext' then 'string'
            when 'numeric' then 'decimal'
            when 'nvarchar' then 'string'
            when 'real' then 'double'
            when 'smalldatetime' then 'DateTime'
            when 'smallint' then 'short'
            when 'smallmoney' then 'decimal'
            when 'text' then 'string'
            when 'time' then 'TimeSpan'
            when 'timestamp' then 'DateTime'
            when 'tinyint' then 'byte'
            when 'uniqueidentifier' then 'Guid'
            when 'varbinary' then 'byte[]'
            when 'varchar' then 'string'
            else 'UNKNOWN_' + typ.name
        end ColumnType,
        case
            when col.is_nullable = 1 and typ.name in ('bigint', 'bit', 'date', 'datetime', 'datetime2', 'datetimeoffset', 'decimal', 'float', 'int', 'money', 'numeric', 'real', 'smalldatetime', 'smallint', 'smallmoney', 'time', 'tinyint', 'uniqueidentifier')
            then '?'
            else ''
        end NullableSign
    from sys.columns col
        join sys.types typ on
            col.system_type_id = typ.system_type_id AND col.user_type_id = typ.user_type_id
            LEFT JOIN sys.extended_properties prop ON col.object_id = prop.major_id AND col.column_id = prop.minor_id
    where object_id = object_id(@TableName)
) t
--order by ColumnId

set @Result = @Result  + '
}'

print @Result

sqlsugar

using SqlSugar;

namespace ConsoleApp3
{
    internal class Program
    {
        static void Main(string[] args)
        {
            var dbName = "数据库名字";
            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
            {
                ConnectionString = $"Server=localhost;uid=sa;pwd=123456789;Database={dbName};MultipleActiveResultSets=true;pooling=true;min pool size=5;max pool size=32767;connect timeout=20;Encrypt=True;TrustServerCertificate=True;",
                DbType = DbType.SqlServer,
                IsAutoCloseConnection = true,
                InitKeyType = InitKeyType.Attribute
            });
            var path = AppDomain.CurrentDomain.BaseDirectory;
            db.DbFirst.Where("TableName", "Student")
                .CreateClassFile(path, "Test.Models");
            Console.WriteLine("生成成功");
        }
    }
}

参考

https://www.cnblogs.com/123525-m/p/18704699