我才接触半年C#,前断时间写个MIS系统`我用ACCESS数据库保存数据`当数据库不设置密码的时候一切正常,但是设置密码以后完全不能使用`我参考了黑魔方的书按照书上的设置添加了user = admin ;password = "12334" ; 但是不成功`请高手指点一下`我的成功连接代码如下:
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;" +
@"Data source = czc.mdb";
try
{
conn.Open();
// Insert code to process data.
}
catch (Exception)
{
MessageBox.Show("Failed to connect to data source");
}
finally
{
conn.Close();
}
}//end创建Access数据库连接的代码*/
请帮忙改一下实现带密码访问`谢谢各位了`
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;" +
@"Data source = czc.mdb";
try
{
conn.Open();
// Insert code to process data.
}
catch (Exception)
{
MessageBox.Show("Failed to connect to data source");
}
finally
{
conn.Close();
}
}//end创建Access数据库连接的代码*/
请帮忙改一下实现带密码访问`谢谢各位了`
strConnection+=@"Data Source=C:\BegASPNET\Northwind.mdb;User ID=Admin;Jet OLEDB:New Database Password=;";
strConnection+=@"Data Source=C:\BegASPNET\Northwind.mdb;User ID=Admin;Jet OLEDB:password=yourpwd;";//replace "yourpwd"
OleDbConnection dataconn = new OleDbConnection();
dataconn.ConnectionString = Lkdatabase;
dataconn.Open();
OleDbDataAdapter chez = new OleDbDataAdapter("SELECT * FROM 车主信息表",dataconn); //查找车主信息表
OleDbDataAdapter shezhR = new OleDbDataAdapter("SELECT * FROM 日间模式收费表",dataconn); //查找日间收费模式信息表
OleDbDataAdapter shezhY = new OleDbDataAdapter("SELECT * FROM 夜间模式收费表",dataconn); //查找夜间收费模式信息表
终止`
有密码并填上密码测试连接失败`显示错误消息:"测试连接失败:因为初始化提供程序时发生错误.工作组信息文件丢失,或是已被其它用户以独占方式打开."
我没用用独占方式打开`如果工作组信息文件丢失`空密码为什么可以成功连接?大家帮帮解决下`谢谢
/// 公有枚举成员-----数据库类型
/// </summary>
public enum DataBaseType{ACCESS97 = 0,ACCESS2KX = 1,SQLSERVER = 2,ORACLE = 3,ODBC = 4};
/// <summary>
/// 打开并返回 OleDbConnection 联接
/// </summary>
/// <Info>
/// <作者>周方勇</作者>
/// <创建日期>2002-10-05</创建日期>
/// <修改日期>2003-04-15</修改日期>
/// <其它说明>无</其它说明>
/// </Info>
/// <Input>
/// <param name="DataBase">数据库类型enum DataBaseType{ACCESS97 = 0,ACCESS2KX = 1,SQLSERVER = 2,ORACLE = 3,ODBC = 4}</param>
/// <param name="StrDataSourceOrAccessPath">数据源。装有SqlServer数据库的计算机名/Oracel的Net8连接串/Access文件路径/ODBC数据源</param>
/// <param name="strDefaultDataBaseOrAccessDatabasePassword">SqlServer默认数据库/Access数据库的密码</param>
/// <param name="strUserID">用户名</param>
/// <param name="strPWD">密码</param>
/// </Input>
/// <Other>
/// 要独立运行，定义 public enum DataBaseType{ACCESS97 = 0,ACCESS2KX = 1,SQLSERVER = 2,ORACLE = 3,ODBC = 4};
/// </Other>
/// <returns>返回 OleDbConnection 联接</returns>
public System.Data.OleDb.OleDbConnection GetOleDbConnection(DataBaseType DataBase,string StrDataSourceOrAccessPath,string strDefaultDataBaseOrAccessDatabasePassword,string strUserID,string strPWD)
{
//定义连接字符串
string strConn="";
//定义OleDb数据库连接
System.Data.OleDb.OleDbConnection oleDbConn=new System.Data.OleDb.OleDbConnection();
switch (DataBase)
{
case DataBaseType.ACCESS97:
strConn = "Provider=Microsoft.Jet.OLEDB.3.51;" + "Password=" + strPWD + ";User ID=" + strUserID + ";Data Source=" + StrDataSourceOrAccessPath + ";Jet OLEDB:Database Password=" + strDefaultDataBaseOrAccessDatabasePassword;
break;
case DataBaseType.ACCESS2KX:
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Password=" + strPWD + ";User ID=" + strUserID + ";Data Source=" + StrDataSourceOrAccessPath + ";Jet OLEDB:Database Password=" + strDefaultDataBaseOrAccessDatabasePassword;
break;
case DataBaseType.SQLSERVER:
strConn = "Provider=SQLOLEDB.1;Password=" + strPWD + ";User ID=" + strUserID + ";Data Source=" + StrDataSourceOrAccessPath + ";Initial Catalog=" + strDefaultDataBaseOrAccessDatabasePassword + ";Persist Security Info=True";
break;
case DataBaseType.ORACLE:
strConn = "Provider=MSDAORA.1;Password=" + strPWD + ";User ID=" + strUserID + ";Data Source=" + StrDataSourceOrAccessPath + ";Persist Security Info=True";
break;
case DataBaseType.ODBC:
strConn = "DSN=" + StrDataSourceOrAccessPath + ";UID=" + strUserID + ";PWD=" + strPWD;
break;
//default:
}//结束switch // '清空错误
// Err.Clear() //打开数据库
try
{
oleDbConn.ConnectionString=strConn;
oleDbConn.Open();
}
catch(System.Exception ex)
{
System.Windows.Forms.MessageBox.Show("错误提示：数据库打开失败，请与管理员联系！" + "\n" + "详细信息：" + ex.Message.ToString(), "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Warning);
oleDbConn=null; //对应VB的Nothing，null 关键字是表示不引用任何对象的空引用的文字值。null 是引用类型变量的默认值。
} //返回
return oleDbConn;
}//GetOleDbConn()结束
string Lkdatabase = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source = c:\\test\\Webapplication1\\czc.mdb;Jet OLEDB:Database Password=tanhui;";