sql ceを使用してC＃のあるデータベースから別のデータベースにsdfテーブルをコピーします。

Question

sqlceの新機能です。私はこれに気づき、同様の質問のためにstackoverflowを検索するために2日間過ごしました。 sqlceを使用して1つのsdfデータベースから別のsdfデータベースにテーブル（スキーマとデータのみ）をコピーする方法を教えてください。 sqlceの主要な用語は何ですか？どんなアドバイスもありがとうございます。

Answer 1

を1つのSDFファイルからスクリプトへのVisual Studio（またはコマンドライン）にスキーマとテーブルを私のSQL Server Compactのツールボックスを使用しても他の自衛隊のファイルに対してスクリプトを実行することができますwith：SQL Serverコンパクトナゲットが必要

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Data; 
using System.Data.SqlServerCe; 

namespace ConsoleApp5 { 
    class Program { 
    static void Main(string[] args) { 
     string tableName = "ZTVC_MF_S_VALCHA"; 
     string sourceString = "Data Source = C:\\Users\\David\\source\\repos\\ConsoleApp5\\ConsoleApp5\\bin\\Debug\\XXX.sdf"; 
     string destString = "Data Source = C:\\Users\\David\\source\\repos\\ConsoleApp5\\ConsoleApp5\\bin\\Debug\\YYY.sdf"; 

     using (SqlCeConnection sourceConn = new SqlCeConnection()) { 
     SqlCeCommand sourceCmd = sourceConn.CreateCommand(); 
     sourceCmd.CommandType = CommandType.Text; 
     sourceCmd.Parameters.AddWithValue("tableName", tableName); 
     sourceConn.ConnectionString = sourceString; 
     sourceConn.Open(); 

     using (SqlCeConnection destConn = new SqlCeConnection()) { 
      destConn.ConnectionString = destString; 
      destConn.Open(); 

      DoesTableExist(tableName, destConn); 
      DataTable dt=GetDataFromTable(tableName, sourceConn); 
      CopyTableSchema(tableName, dt, destConn); 
      FillTableCopy(tableName, dt, destConn); 
      DeleteTable(tableName, destConn); 
      Console.ReadKey(); 
     } 

     } 
    } 
    private static void FillTableCopy( string tabName, DataTable dt, SqlCeConnection destConn) { 
     List<string> dTypesList = new List<string>(); 
     int dTypesListIndexCounter = 0; 
     string sqlCmd = ""; 
     foreach (DataRow row in dt.Rows) { 
      sqlCmd = "INSERT INTO " + tabName + "("; 
      int colHeadCounter = 0; 
      int colHeadLast = dt.Columns.Count; 
      foreach (DataColumn colHead in dt.Columns) { 
      string dType = colHead.DataType.ToString().ToLower().Substring(7); 
      dTypesList.Add(dType); 
      if (++colHeadCounter == colHeadLast) { 
       sqlCmd += colHead + " "; 
      } 
      else { 
       sqlCmd += colHead + ", "; 
      } 
      } 
      sqlCmd += ") VALUES("; 
      //Console.Write(sqlCmd); 
      colHeadCounter = 0; 
      colHeadLast = row.ItemArray.Length; 
      foreach (var item in row.ItemArray) { 
      var temp = item.ToString(); 
      if (temp.Count() == 0) { 
       if (++colHeadCounter == colHeadLast) { 
       sqlCmd += ("null "); 
       }else { 
       sqlCmd += ("null, "); 
       } 
      }else if (dTypesList[dTypesListIndexCounter] == "string" 
      || dTypesList[dTypesListIndexCounter] == "char" 
      || dTypesList[dTypesListIndexCounter] == "datetime" 
      || dTypesList[dTypesListIndexCounter] == "single" 
      || dTypesList[dTypesListIndexCounter] == "guid") { 
       if (++colHeadCounter == colHeadLast) { 
       sqlCmd += ("'" + item + "' "); 
       }else { 
       sqlCmd += ("'" + item + "', "); 
       } 
      }else { 
       if (++colHeadCounter == colHeadLast) { 
       sqlCmd += (item + " "); 
       }else { 
       sqlCmd += (item + ", "); 
       } 
      } 
      dTypesListIndexCounter++; 
      } 
      sqlCmd += ")"; 
      //Console.Write(sqlCmd); 
      //Console.WriteLine(); 
      SqlCeCommand cmd = new SqlCeCommand(sqlCmd, destConn); 
      cmd.ExecuteNonQuery(); 
     } 
     //Console.WriteLine(cmd); 
     Console.WriteLine("Data copy executed."); 
    } 
    private static void DeleteTable(string tableName, SqlCeConnection pathConn) { 
     string sqlCmd = "DROP TABLE " + tableName; 
     SqlCeCommand cmd = new SqlCeCommand(sqlCmd, pathConn); 
     cmd.ExecuteNonQuery(); 
     Console.WriteLine(tableName + " deleted."); 
    } 
    private static void CopyTableSchema(string tableName, DataTable dt, SqlCeConnection destConn) { 
     string sqlCmd = "Create table " + tableName + "("; 
     int colHeadCounter = 0; 
     int colHeadLast = dt.Columns.Count; 
     /*sqlce supported types: bigint, integer,smallint,tinyint,bit,numeric, money, float, real, datetime, 
     * national character, national character varying, ntext, nchar, binary,varbinary, image, uniqueidentifier, 
     * identity, rowguidcol, timestamp/rowversion */ 
     foreach (DataColumn colHead in dt.Columns) { 
      string dType = colHead.DataType.ToString().ToLower().Substring(7); 

      ////still needs all type conversions mapped 
      if (dType == "int16") { 
      dType = "smallint"; 
      } 
      else if (dType == "int32") { 
      dType = "int"; 
      } 
      else if (dType == "int64") { 
      dType = "bigint"; 
      } 
      else if (dType == "string") { 
      dType = "nvarchar(4000)"; 
      } 
      else if (dType == "boolean") { 
      dType = "bit"; 
      } 
      else if (dType == "byte") { 
      dType = "tinyint"; 
      } 
      else if (dType == "byte[]") { 
      dType = "binary"; 
      } 
      else if (dType == "char") { 
      dType = "nchar"; 
      } 
      else if (dType == "datetime") { 
      dType = "datetime"; 
      } 
      else if (dType == "decimal") { 
      dType = "money"; 
      } 
      else if (dType == "double") { 
      dType = "float"; 
      } 
      else if (dType == "sbyte") { 
      dType = "tinyint"; 
      } 
      else if (dType == "single") { 
      dType = "real"; 
      } 
      else if (dType == "guid") { 
      dType = "uniqueidentifier"; 
      } 
      else { 
      Console.WriteLine(); 
      Console.WriteLine("Add new type to type conversion"); 
      Console.ReadKey(); 
      Environment.Exit(0); 
      } 

      if (++colHeadCounter == colHeadLast) { 
      sqlCmd += colHead + " " + dType; 
      } 
      else { 
      sqlCmd += colHead + " " + dType + ", "; 
      } 
     } 
     sqlCmd += ")"; 
     //Console.WriteLine(sqlCmd); 
     SqlCeCommand cmd = new SqlCeCommand(sqlCmd, destConn); 
     cmd.ExecuteNonQuery(); 
     Console.WriteLine("Copy of " + tableName + " created."); 
    } 
    private static DataTable GetDataFromTable(string tableName, SqlCeConnection sourceConn) { 
     SqlCeCommand sourceCmd = sourceConn.CreateCommand(); 
     sourceCmd.CommandText = "Select * from " + tableName; 
     SqlCeDataAdapter sourceAdp = new SqlCeDataAdapter(sourceCmd); 
     DataTable dt = new DataTable(); 
     sourceAdp.Fill(dt); 
     //Console.WriteLine("The SqlCeDataAdapter succesfully filled " + dt.Rows.Count + " rows in the DataSet!"); 
     return dt; 
    } 
    private static bool DoesTableExist(string tableName, SqlCeConnection destConn) { 
     bool doesIt = false; 
     SqlCeCommand destCmd = destConn.CreateCommand(); 
     destCmd.CommandType = CommandType.Text; 
     destCmd.CommandType = CommandType.Text; 
     destCmd.CommandText = "SELECT 1 FROM Information_Schema.Tables WHERE TABLE_NAME = @tableName"; 
     destCmd.Parameters.AddWithValue("tableName", tableName); 
     object result = destCmd.ExecuteScalar(); 
     if (result != null) { 
     doesIt = true; 
     } 
     return doesIt; 
    } 
    } 
} 

Answer 2

あなたは、これは私が思いついたものです