Program.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Text;

namespace BuildMd
{
    class Program
    {
        static void Main(string[] args)
        {
            string pathBase = AppDomain.CurrentDomain.BaseDirectory;

            string mdPath = pathBase;
            File.Delete(mdPath + "test.md");
            DataTable tables = ExecuteDataTable("select * from INFORMATION_SCHEMA.TABLES");
            foreach (DataRow tableName in tables.Rows)
            {
                string tablename = (string)tableName["TABLE_NAME"];
                //if (tablename.StartsWith("WX_"))
                //{
                List<string> Rows = new List<string>();
                Rows.Add("### " + tablename + "(*快来修改我*)");
                Rows.Add("");
                Rows.Add("| 列名 | 字段 | 数据类型 | PK | NULL | DEFAULT | 描述 |");
                Rows.Add("|----------------|----------------------------|--------------------|------|-------|--------------|------------------------------------------------------------------------------------|");
                DataTable tableColumns = ExecuteDataTable("select * from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME=@tablename",new SqlParameter("tablename",tablename));
                foreach (DataRow column in tableColumns.Rows)
                {
                    string column_name = (string)column["COLUMN_NAME"];
                    string data_type = (string)column["DATA_TYPE"];
                    string character_maximum_length = column["CHARACTER_MAXIMUM_LENGTH"].ToString();
                    string column_default = column["COLUMN_DEFAULT"].ToString();
                    string is_nullable = column["IS_NULLABLE"].ToString();

                    MDTableRow mdtablerow = new MDTableRow();
                    mdtablerow.column_name = column_name;
                    mdtablerow.data_type = data_type;
                    mdtablerow.character_maximum_length = character_maximum_length;
                    mdtablerow.column_default = column_default;
                    mdtablerow.is_nullable = is_nullable;

                    Rows.Add(WriteTableRow(mdtablerow));
                }
                //File.Delete(mdPath + "test.md");
                File.AppendAllLines(mdPath + string.Format("{0}.md",tableName["TABLE_CATALOG"]),Rows);
                Console.WriteLine(tablename + " 生成完成");
                //}
            }
            Console.WriteLine();
            Console.WriteLine("生成结束！");
            Console.ReadKey();
        }

        public static string WriteTableRow(MDTableRow mdtablerow)
        {
            string datatype = mdtablerow.character_maximum_length == "" || mdtablerow.character_maximum_length == "2147483647"
                ? "`" + mdtablerow.data_type.ToUpper() + "`" : "`" + mdtablerow.data_type.ToUpper() + "(" + mdtablerow.character_maximum_length + ")`";

            string data_tp = "`" + System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(SqlDataTypeToNetDataType(mdtablerow.data_type)) + "`";

            string str = string.Format("|{0}|{1}|{2}|{3}|{4}|{5}|{6}|",Pad("","----------------".Length,false),Pad(mdtablerow.column_name,"----------------------------".Length),Pad(mdtablerow.character_maximum_length == "-1" ? "`" + mdtablerow.data_type.ToUpper() + "(MAX)`" : datatype,"--------------------".Length),Pad(mdtablerow.column_name == "ID" ? "PK" : "","------".Length),Pad(mdtablerow.is_nullable == "NO" ? "" : "NULL","-------".Length),Pad(mdtablerow.column_default,"--------------".Length),"------------------------------------------------------------------------------------".Length)
                );
            return str;
        }

        public static string Pad(string basestr,int padlength,bool isCN = false)
        {
            int baselength = (int)(basestr.Length * (isCN ? 2 : 1));
            int length = padlength - baselength;
            return basestr.PadLeft(2).PadRight(padlength - (isCN ? basestr.Length : 0));
        }


        public static DataTable ExecuteDataTable(string cmdText,params SqlParameter[] parameters)
        {
            using (SqlConnection conn = new SqlConnection(@"server=WZY-PC;database=HibernateBlog;uid=sa;pwd=xxxxxx;"))
            {
                conn.Open();
                using (SqlCommand cmd = conn.CreateCommand())
                {
                    cmd.CommandText = cmdText;
                    cmd.Parameters.AddRange(parameters);
                    DataTable dt = new DataTable();
                    SqlDataAdapter adapter = new SqlDataAdapter(cmd);
                    adapter.Fill(dt);
                    return dt;
                }
            }
        }

        private static string SqlDataTypeToNetDataType(string datatype)
        {
            switch (datatype)
            {
                case "int":
                    return "int";

                case "nvarchar":
                case "varchar":
                case "nchar":
                case "char":
                    return "string";

                case "bit":
                    return "bool";

                case "datetime":
                case "datetime2":
                    return "DateTime";

                case "decimal":
                    return "decimal";

                default:
                    return "object";

            }
        }
    }

    class MDTableRow
    {
        public string column_name { get; set; }
        public string data_type { get; set; }
        public string character_maximum_length { get; set; }
        public string column_default { get; set; }
        public string is_nullable { get; set; }
    }
}

运行结果如图:

UsersBlogs(快来修改)