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  • SQLServer 根据表名生成实体类

    //来源:https://www.cnblogs.com/jhli/p/11552105.html  

    declare @TableName sysname = 'T1'
    declare @Result varchar(max) = '
    /// <summary>
    /// ' + @TableName +

    '
    /// </summary>
    public class ' + @TableName + '
    {'

    select @Result = @Result + '
    /// <summary>
    /// ' + CONVERT(NVARCHAR(500), ISNULL(ColName, '无')) +

    '
    /// </summary>
    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

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  • 原文地址:https://www.cnblogs.com/TNSSTAR/p/13158039.html
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