我想从数据库服务器(SQL Server 2012)获取数据以写入我在本地数据库中的内容(SQL Server Compact Edition 4.0 - WinForms应用程序 - VS 2013)
.SDF
数据库文件 - >确定。.SDF
文件的本地连接 - >好。 通过代码创建表格 - >确定。
打开与数据库服务器的连接 - >不好 ! :(
我收到此错误消息:
System.ArgumentException:不支持关键字:'初始目录'
这是我的代码:
class MySqlCeEngine
{
private const string LOCAL_SDF_FILE = "LocalDB.sdf";
private const string LOCAL_CONN_STRING = "Data Source='|DataDirectory|LocalDB.sdf'; LCID=1033; Password=3C670F044A; Encrypt=TRUE;";
private const string SOURCE_CONN_STRING = "Data Source=SQL\\SERVER;Initial Catalog=myDB;Integrated Security=True;Pooling=False;
public static void CreateDB()
{
if (File.Exists(LOCAL_SDF_FILE))
{
File.Delete(LOCAL_SDF_FILE);
}
SqlCeEngine engine = new SqlCeEngine(LOCAL_CONN_STRING);
engine.CreateDatabase();
engine.Dispose();
SqlCeConnection localCnx = null;
try
{
localCnx = new SqlCeConnection(LOCAL_CONN_STRING);
localCnx.Open();
SqlCeCommand localCmd = localCnx.CreateCommand();
#region CREATE TABLE t_Address
localCmd.CommandText = @"CREATE TABLE t_Address(
Address_ID int IDENTITY(1,1) NOT NULL,
Address_Main nvarchar(4000) NULL,
Address_CityName nvarchar(50) NULL,
Address_CityZipCode nvarchar(50) NULL,
Address_CountryID int NULL,
Address_CustomerID int NULL,
Address_SiteID int NULL,
Address_IsVisible bit NOT NULL,
CONSTRAINT PK_t_AdressID PRIMARY KEY (Address_ID)
)";
localCmd.ExecuteNonQuery();
#endregion
using (SqlCeConnection sourceCnx = new SqlCeConnection(SOURCE_CONN_STRING))
{
try
{
sourceCnx.Open();
SqlCeCommand SourceCmd = sourceCnx.CreateCommand();
SourceCmd.CommandText = "SELECT * FROM t_Address";
SqlCeDataReader reader = SourceCmd.ExecuteReader();
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(LOCAL_CONN_STRING))
{
bulkCopy.DestinationTableName = "t.Address";
try
{
// Write from the source (DB server) to the destination (local wibe)
bulkCopy.WriteToServer(reader);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "An error occurred", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
reader.Close();
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "An error occurred", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
sourceCnx.Close();
}
}
}
catch(Exception ex)
{
MessageBox.Show(ex.ToString(), "An error occurred", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
localCnx.Close();
}
}
}
我在网上做了一些搜索,发现我应该添加" ProviderName = System.Data.SqlClient"但我仍有这个问题。
我也尝试过使用System.Data.Entity.Database类方法" OpenConnectionString"但它没有用(VS告诉我这个类不包含这个方法的定义)。
我不知道该怎么做,虽然我在这里和那里找到了一些东西。
谢谢,
地狱猫
答案 0 :(得分:1)
使用SOURCE_CONN_STRING
与完整 SQL Server的连接必须使用SqlConnection
- 而不是SqlCeConnection
...
所以改变这一行:
using (SqlCeConnection sourceCnx = new SqlCeConnection(SOURCE_CONN_STRING))
为:
using (SqlConnection sourceCnx = new SqlConnection(SOURCE_CONN_STRING))
并在处理完整的SQL Server实例时使用SqlCommand
(而非SqlCeCommand
)。