存储过程生成POCO

       下面我们演示使用T-SQL写的一个存储过程，生成C#的POCO代码：

CREATE PROCEDURE usp_TableToClass
/*
Generates C# class code for a table
and fields/properties for each column.

Run as "Results to Text" or "Results to File" (not Grid)

Example: EXEC usp_TableToClass 'MyTable'
*/
@table_name SYSNAME

AS

SET NOCOUNT ON

DECLARE @temp TABLE
(
sort INT,
code TEXT
)

INSERT INTO @temp
SELECT 1, 'public class ' + @table_name + CHAR(13) + CHAR(10) + '{'

INSERT INTO @temp
SELECT 2, CHAR(13) + CHAR(10) + '#region Constructors' + CHAR(13) + CHAR(10)
INSERT INTO @temp
SELECT 3, CHAR(9) + 'public ' + @table_name + '()'
+ CHAR(13) + CHAR(10) + CHAR(9) + '{'
+ CHAR(13) + CHAR(10) + CHAR(9) + '}'

INSERT INTO @temp
SELECT 4, '#endregion' + CHAR(13) + CHAR(10)

INSERT INTO @temp
SELECT 5, '#region Private Fields' + CHAR(13) + CHAR(10)
INSERT INTO @temp
SELECT 6, CHAR(9) + 'private ' +
CASE
WHEN DATA_TYPE LIKE '%CHAR%' THEN 'string '
WHEN DATA_TYPE LIKE '%INT%' THEN 'int '
WHEN DATA_TYPE LIKE '%DATETIME%' THEN 'DateTime '
WHEN DATA_TYPE LIKE '%BINARY%' THEN 'byte[] '
WHEN DATA_TYPE = 'BIT' THEN 'bool '
WHEN DATA_TYPE LIKE '%TEXT%' THEN 'string '
ELSE 'object '
END + '_' + COLUMN_NAME + ';' + CHAR(9)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = @table_name
ORDER BY ORDINAL_POSITION

INSERT INTO @temp
SELECT 7, '#endregion' +
CHAR(13) + CHAR(10)

INSERT INTO @temp
SELECT 8, '#region Public Properties' + CHAR(13) + CHAR(10)
INSERT INTO @temp
SELECT 9, CHAR(9) + 'public ' +
CASE
WHEN DATA_TYPE LIKE '%CHAR%' THEN 'string '
WHEN DATA_TYPE LIKE '%INT%' THEN 'int '
WHEN DATA_TYPE LIKE '%DATETIME%' THEN 'DateTime '
WHEN DATA_TYPE LIKE '%BINARY%' THEN 'byte[] '
WHEN DATA_TYPE = 'BIT' THEN 'bool '
WHEN DATA_TYPE LIKE '%TEXT%' THEN 'string '
ELSE 'object '
END + COLUMN_NAME +
CHAR(13) + CHAR(10) + CHAR(9) + '{' +
CHAR(13) + CHAR(10) + CHAR(9) + CHAR(9) +
'get { return _' + COLUMN_NAME + '; }' +
CHAR(13) + CHAR(10) + CHAR(9) + CHAR(9) +
'set { _' + COLUMN_NAME + ' = value; }' +
CHAR(13) + CHAR(10) + CHAR(9) + '}'
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = @table_name
ORDER BY ORDINAL_POSITION

INSERT INTO @temp
SELECT 10, '#endregion' +
CHAR(13) + CHAR(10) + '}'

SELECT code FROM @temp
ORDER BY sort

在DB中创建好后，怎么用呢？例如下面我们以 aspnet_Membership表为例： 

EXEC usp_TableToClass aspnet_Membership

接着生成这样的CSharp代码，不包含行号：

public class aspnet_Membership
{

#region Constructors
    public aspnet_Membership()
    {
    }
#endregion
#region Private Fields
    private object _ApplicationId;
    private object _UserId;
    private string _Password;
    private int _PasswordFormat;
    private string _PasswordSalt;
    private string _MobilePIN;
    private string _Email;
    private string _LoweredEmail;
    private string _PasswordQuestion;
    private string _PasswordAnswer;
    private bool _IsApproved;
    private bool _IsLockedOut;
    private DateTime _CreateDate;
    private DateTime _LastLoginDate;
    private DateTime _LastPasswordChangedDate;
    private DateTime _LastLockoutDate;
    private int _FailedPasswordAttemptCount;
    private DateTime _FailedPasswordAttemptWindowStart;
    private int _FailedPasswordAnswerAttemptCount;
    private DateTime _FailedPasswordAnswerAttemptWindowStart;
    private string _Comment;
#endregion
#region Public Properties
    public object ApplicationId
    {
        get { return _ApplicationId; }
        set { _ApplicationId = value; }
    }
    public object UserId
    {
        get { return _UserId; }
        set { _UserId = value; }
    }
    public string Password
    {
        get { return _Password; }
        set { _Password = value; }
    }
    public int PasswordFormat
    {
        get { return _PasswordFormat; }
        set { _PasswordFormat = value; }
    }
    public string PasswordSalt
    {
        get { return _PasswordSalt; }
        set { _PasswordSalt = value; }
    }
    public string MobilePIN
    {
        get { return _MobilePIN; }
        set { _MobilePIN = value; }
    }
    public string Email
    {
        get { return _Email; }
        set { _Email = value; }
    }
    public string LoweredEmail
    {
        get { return _LoweredEmail; }
        set { _LoweredEmail = value; }
    }
    public string PasswordQuestion
    {
        get { return _PasswordQuestion; }
        set { _PasswordQuestion = value; }
    }
    public string PasswordAnswer
    {
        get { return _PasswordAnswer; }
        set { _PasswordAnswer = value; }
    }
    public bool IsApproved
    {
        get { return _IsApproved; }
        set { _IsApproved = value; }
    }
    public bool IsLockedOut
    {
        get { return _IsLockedOut; }
        set { _IsLockedOut = value; }
    }
    public DateTime CreateDate
    {
        get { return _CreateDate; }
        set { _CreateDate = value; }
    }
    public DateTime LastLoginDate
    {
        get { return _LastLoginDate; }
        set { _LastLoginDate = value; }
    }
    public DateTime LastPasswordChangedDate
    {
        get { return _LastPasswordChangedDate; }
        set { _LastPasswordChangedDate = value; }
    }
    public DateTime LastLockoutDate
    {
        get { return _LastLockoutDate; }
        set { _LastLockoutDate = value; }
    }
    public int FailedPasswordAttemptCount
    {
        get { return _FailedPasswordAttemptCount; }
        set { _FailedPasswordAttemptCount = value; }
    }
    public DateTime FailedPasswordAttemptWindowStart
    {
        get { return _FailedPasswordAttemptWindowStart; }
        set { _FailedPasswordAttemptWindowStart = value; }
    }
    public int FailedPasswordAnswerAttemptCount
    {
        get { return _FailedPasswordAnswerAttemptCount; }
        set { _FailedPasswordAnswerAttemptCount = value; }
    }
    public DateTime FailedPasswordAnswerAttemptWindowStart
    {
        get { return _FailedPasswordAnswerAttemptWindowStart; }
        set { _FailedPasswordAnswerAttemptWindowStart = value; }
    }
    public string Comment
    {
        get { return _Comment; }
        set { _Comment = value; }
    }
#endregion
}

这篇文章只是抛砖引玉，你可以创建更强大的功能SP, 或许这是一个思路。

希望对您开发有帮助。

作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。