C#同步SQL Server数据库Schema

1. 先写一个sql加工类：

using System;

using System.Collections.Generic;

using System.Data;

using System.Data.SqlClient;

using System.Text;

namespace PinkDatabaseSync

{

    class DBUtility : IDisposable

    {

        private string Server;

        private string Database;

        private string Uid;

        private string Password;

        private string connectionStr;

        private SqlConnection sqlConn;

        public void EnsureConnectionIsOpen()

        {

            if (sqlConn == null)

            {

                sqlConn = new SqlConnection(this.connectionStr);

                sqlConn.Open();

            }

            else if (sqlConn.State == ConnectionState.Closed)

            {

                sqlConn.Open();

            }

        }

        public DBUtility(string server, string database, string uid, string password)

        {

            this.Server = server;

            this.Database = database;

            this.Uid = uid;

            this.Password = password;

            this.connectionStr = "Server=" + this.Server + ";Database=" + this.Database + ";User Id=" + this.Uid + ";Password=" + this.Password;

        }

        public int ExecuteNonQueryForMultipleScripts(string sqlStr)

        {

            EnsureConnectionIsOpen();

            SqlCommand cmd = sqlConn.CreateCommand();

            cmd.CommandType = CommandType.Text;

            cmd.CommandText = sqlStr;

            return cmd.ExecuteNonQuery();

        }

        public int ExecuteNonQuery(string sqlStr)

        {

            EnsureConnectionIsOpen();

            SqlCommand cmd = new SqlCommand(sqlStr, sqlConn);

            cmd.CommandType = CommandType.Text;

            return cmd.ExecuteNonQuery();

        }

        public object ExecuteScalar(string sqlStr)

        {

            EnsureConnectionIsOpen();

            SqlCommand cmd = new SqlCommand(sqlStr, sqlConn);

            cmd.CommandType = CommandType.Text;

            return cmd.ExecuteScalar();

        }

        public DataSet ExecuteDS(string sqlStr)

        {

            DataSet ds = new DataSet();

            EnsureConnectionIsOpen();

            SqlDataAdapter sda= new SqlDataAdapter(sqlStr,sqlConn);

            sda.Fill(ds);

            return ds;

        }

        public void Dispose()

        {

            if (sqlConn != null)

                sqlConn.Close();

        }

    }

}

2. 再写个数据库类型类：

using System;

using System.Collections.Generic;

using System.Text;

namespace PinkDatabaseSync

{

    public class SQLDBSystemType

    {

        public static Dictionary<string, string> systemTypeDict

        {

            get{

            var systemTypeDict = new Dictionary<string, string>();

            systemTypeDict.Add("34", "image");

            systemTypeDict.Add("35", "text");

            systemTypeDict.Add("36", "uniqueidentifier");

            systemTypeDict.Add("40", "date");

            systemTypeDict.Add("41", "time");

            systemTypeDict.Add("42", "datetime2");

            systemTypeDict.Add("43", "datetimeoffset");

            systemTypeDict.Add("48", "tinyint");

            systemTypeDict.Add("52", "smallint");

            systemTypeDict.Add("56", "int");

            systemTypeDict.Add("58", "smalldatetime");

            systemTypeDict.Add("59", "real");

            systemTypeDict.Add("60", "money");

            systemTypeDict.Add("61", "datetime");

            systemTypeDict.Add("62", "float");

            systemTypeDict.Add("98", "sql_variant");

            systemTypeDict.Add("99", "ntext");

            systemTypeDict.Add("104", "bit");

            systemTypeDict.Add("106", "decimal");

            systemTypeDict.Add("108", "numeric");

            systemTypeDict.Add("122", "smallmoney");

            systemTypeDict.Add("127", "bigint");

            systemTypeDict.Add("240-128", "hierarchyid");

            systemTypeDict.Add("240-129", "geometry");

            systemTypeDict.Add("240-130", "geography");

            systemTypeDict.Add("165", "varbinary");

            systemTypeDict.Add("167", "varchar");

            systemTypeDict.Add("173", "binary");

            systemTypeDict.Add("175", "char");

            systemTypeDict.Add("189", "timestamp");

            systemTypeDict.Add("231", "nvarchar");

            systemTypeDict.Add("239", "nchar");

            systemTypeDict.Add("241", "xml");

            systemTypeDict.Add("231-256", "sysname");

            return systemTypeDict;

            }

        }

    }

}

3. 写个同步数据库表结构schema：

public void SyncDBSchema(string server, string dbname, string uid, string password,

            string server2, string dbname2, string uid2, string password2)

        {

            DBUtility db = new DBUtility(server, dbname, uid, password);

            DataSet ds = db.ExecuteDS("SELECT sobjects.name FROM sysobjects sobjects WHERE sobjects.xtype = 'U'");

            DataRowCollection drc = ds.Tables[0].Rows;

            string test = string.Empty;

            string newLine = " ";

            foreach (DataRow dr in drc)

            {

                string tableName = dr[0].ToString();

                test += "if NOT exists (select * from sys.objects where name = '" + tableName + "' and type = 'u')";

                test += "CREATE TABLE [dbo].[" + tableName + "](" + newLine;

                DataSet ds2 = db.ExecuteDS("SELECT * FROM sys.columns WHERE object_id = OBJECT_ID('dbo." + tableName + "')");

                DataRowCollection drc2 = ds2.Tables[0].Rows;

                foreach (DataRow dr2 in drc2)

                {

                    test += "[" + dr2["name"].ToString() + "] ";

                    string typeName = SQLDBSystemType.systemTypeDict[dr2["system_type_id"].ToString()];

                    test += "[" + typeName + "]";

                    string charLength = string.Empty;

                    if (typeName.Contains("char"))

                    {

                        charLength = (Convert.ToInt32(dr2["max_length"].ToString()) / 2).ToString();

                        test += "(" + charLength + ")" + newLine;

                    }

                    bool isIdentity = bool.Parse(dr2["is_identity"].ToString());

                    test += isIdentity ? " IDENTITY(1,1)" : string.Empty;

                    bool isNullAble = bool.Parse(dr2["is_nullable"].ToString());

                    test += (isNullAble ?

" NULL," : " NOT NULL,") + newLine;

                }

                test += "CONSTRAINT [PK_" + tableName + "] PRIMARY KEY CLUSTERED ";

                string primaryKeyName = drc2[0]["name"].ToString();

                test += @"(

                    	[" + primaryKeyName + @"] ASC

                        )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

                        ) ON [PRIMARY]" + newLine;

            }

            test = "use [" + dbname2 + "]" + newLine + test;

            DBUtility db2 = new DBUtility(server2, dbname2, uid2, password2);

            db2.ExecuteNonQueryForMultipleScripts(test);

        }

4. 最后运行同步函数：

private void SyncDB_Click(object sender, EventArgs e)

        {

            string server = "localhost";

            string dbname = "testdb1";

            string uid = "sa";

            string password = "password1";

            string server2 = "servername2";

            string dbname2 = "testdb2";

            string uid2 = "sa";

            string password2 = "password2";

            try

            {

                SyncDBSchema(server, dbname, uid, password, server2, dbname2, uid2, password2);

                MessageBox.Show("Done sync db schema successfully!");

            }

            catch (Exception exc)

            {

                MessageBox.Show(exc.ToString());

            }

        }

注： 这仅仅是做个简单的DB schema同步。还能够非常多地方要继续完好，例如，约束。双主密钥。外键等。。