无法初始化OLEDB提供程序的数据源对象;对于链接服务器"(null)"
本文关键字:quot 于链接 服务器 null 链接 OLEDB 初始化 程序 对象 数据源 | 更新日期: 2023-09-27 18:06:47
出现如下错误
'无法初始化链接服务器"(null)"的OLEDB提供程序"Microsoft.Jet.OLEDB.4.0"的数据源对象。链接服务器的OLEDB提供程序"Microsoft.Jet.OLEDB.4.0" (null)"返回消息"无法找到可安装的ISAM "。
我已经写了这个代码
try
{
DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
DataTable userTables = null;
using (connection)
{
string mappath = dataGridView1.CurrentRow.Cells["Path"].Value.ToString();
string[] filePaths = Directory.GetFiles(@"" + mappath + "", "*.mdb", SearchOption.TopDirectoryOnly);
// c:'test'test.mdb
foreach (string tr in filePaths)
{
connection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + tr + "";
string[] restrictions = new string[4];
restrictions[3] = "Table";
connection.Open();
userTables = connection.GetSchema("Tables", restrictions);
List<string> tableNames = new List<string>();
for (int i = 0; i < userTables.Rows.Count; i++)
tableNames.Add(userTables.Rows[i][2].ToString());
try
{
foreach (string tableName in tableNames)
{
cn1 = new SqlConnection(con);
if (cn1.State != ConnectionState.Open) { cn1.Open(); }
SqlCommand cmd = new SqlCommand("select * into [" + tableName + "] from OPENROWSET('Microsoft.Jet.OLEDB.4.0','" + tr + "',[" + tableName + "])");
cmd.Connection = cn1;
cmd.ExecuteNonQuery();---Got error Here
}
}
catch (Exception Ex) { connection.Close(); }
connection.Close();
}
}
}
catch (Exception Ex) { }
请解决这个错误
我在我的本地环境中做了一个简单的测试,下面的工作就像一个魅力(这是来自c#控制台应用程序):
static void Main(string[] args)
{
string accessConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:''Temp''StackOverflowDemo''MyAccessDb.mdb;User Id=admin;Password =; ";
using (DbConnection accessConnection = new OleDbConnection(accessConnectionString))
{
accessConnection.Open();
using (DbCommand accessCommand = new OleDbCommand())
{
string accessQuery =
"SELECT * INTO [MySqlTable] IN '' [ODBC;Driver={SQL Server};Server=(local);Database=MySqlDb;Uid=username;Pwd=password;] FROM [MyAccessTable]";
accessCommand.CommandText = accessQuery;
accessCommand.Connection = accessConnection;
accessCommand.ExecuteNonQuery();
}
}
}
我已经测试了这与MS Access 2002数据库作为我的源和SQL Server 2014数据库作为我的目标。
看起来你正在尝试使用错误的连接字符串连接到SQL服务器(我假设你正试图从MS Access复制信息到MS SQL server)。
一个有效的MS SQL Server连接字符串看起来像这样:Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;
有关连接字符串的更多信息,请查看:http://www.connectionstrings.com