我如何通过编程&QUOT产生;插入"从数据库表中数据的脚本文件？ [英] how i can generate programmatically "insert into" data script file from a database table?

问题描述

有一个优雅的对象的东方基础的框架？

is there an elegant object-orient based framework?

推荐答案

下面是一些代码，我写了产生插入存储在数据库中的每个表的过程。它也处理返回新的ID为那些具有标识列的表。它使用SQL SMO。有些是有点具体到我的项目，所以请让我知道，如果你有任何问题。

Here is some code that I wrote for generating 'insert' stored procedures for every table in a database. It also handles returning the new id for those tables that have an identity column. It uses SQL SMO. Some of it is a bit specific to my project so please let me know if you have any questions.

    void InsertScripts(Database db)
    {
        var tables = db.Tables.ToIEnumerable(); //this is an extension method to convert Database.Tables into an IEnumerable<Table>             
        {

            foreach (var t in tables)
            {
                var sb = new StringBuilder();
                var sp = new StoredProcedure(db, "gen_insert_" + t.Name);

                sp.AnsiNullsStatus = false;
                sp.QuotedIdentifierStatus = false;
                sp.TextMode = false;                    

                var columns = t.Columns.ToIEnumerable().Where(c => !c.Identity && !c.IsReadOnly()).ToList();

                foreach (var c in columns)
                {
                    var p = new StoredProcedureParameter(sp, "@" + t.Name + "_" + c.Name, c.DataType);                        

                    p.IsCursorParameter = false;


                    if(c.Default != null && c.Default.Length > 0)
                        p.DefaultValue = c.Default;

                    if (c.Nullable)
                        p.DefaultValue = "NULL";


                    sp.Parameters.Add(p);                        

                }


                var cols = string.Join(",", columns.Select(c => c.Name).ToArray());
                var vals = string.Join(",", columns.Select(c => "@" + t.Name + "_" + c.Name).ToArray());


                var sql = string.Format("insert into {0} ({1}) values ({2});", t.Name, cols, vals);

                sb.AppendLine(sql);

                if (t.Columns.ToIEnumerable().Any(c => c.Identity))
                {
                    var declaration = "declare @newid int;\r\n";
                    var ret = "select @newid = scope_identity();\r\nselect @newid;\r\nreturn @newid";

                    sb.Insert(0, declaration);
                    sb.AppendLine(ret);

                }

                sp.TextBody = sb.ToString();

                if(cols.Length > 0 && sp.Parent.StoredProcedures[sp.Name] == null)
                    sp.Create();

            }


        }
    }

public static class Utils //Extension methods...
{
    public static IEnumerable<Table> ToIEnumerable(this TableCollection tables)
    {
        var list = new List<Table>();

        foreach (Table t in tables)
            list.Add(t);

        return list;
    }

    public static IEnumerable<View> ToIEnumerable(this ViewCollection views)
    {
        var list = new List<View>();

        foreach (View v in views)
            list.Add(v);

        return list;
    }

    public static IEnumerable<Column> ToIEnumerable(this ColumnCollection columns)
    {
        var list = new List<Column>();

        foreach (Column c in columns)
            list.Add(c);

        return list;
    }


    public static IEnumerable<ForeignKey> ToIEnumerable(this ForeignKeyCollection columns)
    {
        var list = new List<ForeignKey>();

        foreach (ForeignKey c in columns)
            list.Add(c);

        return list;
    }


    public static IEnumerable<string> ToIEnumerable(this ForeignKeyColumnCollection columns)
    {
        var list = new List<string>();

        foreach (ForeignKeyColumn c in columns)
            list.Add(c.Name);

        return list;
    }
}

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