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Dec 2, 2006

Here is the big problem:

I am using ASP.NET 2.0 login control. this control connect to ASPNET.MDF database.
I built another application using windows service, and this application also connects to ASPNET.MDF database.

problem is that the first application that connects to the database, locks the database, and so the other application cannot use the database untill the other application is closed.

I am going on circles about this, and just don't know what to do.

Please please please. love me do.

 

 

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 using System;

namespace BaResearch.Data.msSql
{
interface ISqlDataObject
{
System.Data.SqlClient.SqlConnection Connection { get; }
string ConnectionString { get; set; }
}
}

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

namespace BaResearch.Data.msSql
{

public class SqlDataObject : ISqlDataObject
{

private string _ConnectionString;

public SqlConnection Connection
{
get { return new SqlConnection(_ConnectionString); }
}

public string ConnectionString
{
get
{
return _ConnectionString;
}
set
{
_ConnectionString = value;
}
}

}

}

 __________________________________using System;

namespace BaResearch.Data
{
interface IBid
{
string Client { get; set; }
string Contact { get; set; }
string Sponsor { get; set; }
string Priority { get; set; }
string BidStatus { get; set; }
}
}

 _____________________________________________using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace BaResearch.Data.msSql
{

public class Bid : SqlDataObject, IBid
{

#region private member & variables

private int _BidID;
private string _DateCreated;
private string _CreatedBy;

private string _Client;
private string _Contact;
private string _Sponsor;
private string _Priority;
private string _BidStatus;

private SqlDataAdapter sqlda = new SqlDataAdapter();
private SqlCommand _command;
private SqlParameter[] _parameters =
{
new SqlParameter("@client",SqlDbType.NVarChar),
new SqlParameter("@contact",SqlDbType.NVarChar),
new SqlParameter("@sponsor",SqlDbType.NVarChar),
new SqlParameter("@priority",SqlDbType.NVarChar),
new SqlParameter("@bidstatus",SqlDbType.NVarChar),
};

#endregion

#region public member variables - stored procedures

//private string sp_Create = "bids_sp_insert";
//private string sp_Update_ByID = "bids_sp_updatebyid";
//private string sp_Delete_ByID = "bids_sp_deletebyid";
//private string sp_Select_All = "bids_sp_selectall";
//private string sp_Select_ByID = "bids_sp_selectbyid";
//private string sp_Select_ByValue = "bids_sp_selectbyvalue";

#endregion

#region constructors and destructors

public Bid()
{
if (this.ConnectionString == null)
{
this.ConnectionString = ConfigurationManager.ConnectionStrings["SQL.ConnectionString"].ConnectionString;
}
else
{
new Bid(this.ConnectionString);
}
}

public Bid(string ConnectionString)
{
this.ConnectionString = ConnectionString;
}

#endregion

#region methods & events

/// <summary>
/// Attach parameters to an SqlCommand
/// </summary>
/// <param name="sqlcmd">SqlCommand</param>
private void attachparameters(SqlCommand sqlcmd)
{
sqlcmd.Parameters.Clear();
foreach (SqlParameter param in _parameters)
{
sqlcmd.Parameters.Add(param);
}
}

/// <summary>
/// Assign value to the parameters
/// </summary>
/// <param name="sqlcmd">SqlCommand</param>
/// <param name="value">Client object</param>
private void assignparametervalues(SqlCommand sqlcmd, Bid value)
{
this.attachparameters(sqlcmd);
// todo: assign parameter values here
sqlcmd.Parameters[0].Value = value.Client;
sqlcmd.Parameters[1].Value = value.Contact;
sqlcmd.Parameters[2].Value = value.Sponsor;
sqlcmd.Parameters[3].Value = value.Priority;
sqlcmd.Parameters[4].Value = value.BidStatus;
}

public virtual void Create(Bid value)
{
_command = new SqlCommand();
_command.Connection = this.Connection;
_command.CommandText = @"INSERT INTO bids (client, contact, sponsor, priority, bidstatus, createdby)
VALUES (@client, @contact, @sponsor, @priority, @bidstatus, @createdby);";
_command.CommandType = CommandType.Text;

try
{
sqlda.InsertCommand = _command;
this.assignparametervalues(sqlda.InsertCommand, value);
sqlda.InsertCommand.Parameters.AddWithValue("@createdby", value.CreatedBy);
sqlda.InsertCommand.Parameters.Add("@bidid", SqlDbType.Int);
sqlda.InsertCommand.Parameters["@bidid"].Direction = ParameterDirection.ReturnValue;
sqlda.InsertCommand.Connection.Open();
sqlda.InsertCommand.ExecuteNonQuery();
sqlda.InsertCommand.Connection.Close();
sqlda.InsertCommand.Connection.Dispose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
}

public virtual int Update(Bid value)
{
int result;

_command = new SqlCommand();
_command.Connection = this.Connection;
_command.CommandText = @"UPDATE bids SET client=@client, contact=@contact, sponsor=@sponsor,
priority=@priority, bidstatus=@bidstatus
WHERE bidid=@bidid";
_command.CommandType = CommandType.Text;

try
{
sqlda.UpdateCommand = _command;
using (SqlCommand _cmd = sqlda.UpdateCommand)
{
this.assignparametervalues(_cmd, value);
_cmd.Parameters.AddWithValue("@bidid", value.BidID);
_cmd.Connection.Open();
result = _cmd.ExecuteNonQuery();
_cmd.Connection.Close();
_cmd.Connection.Dispose();
}
}
catch (Exception e)
{
throw new Exception(e.Message);
}

return result;
}

public virtual void Delete(Bid value)
{
_command = new SqlCommand();
_command.Connection = this.Connection;
_command.CommandText = @"DELETE bids WHERE bidid=@bidid;";
_command.CommandType = CommandType.Text;

try
{
sqlda.DeleteCommand = _command;
using (SqlCommand _cmd = sqlda.DeleteCommand)
{
_cmd.Parameters.AddWithValue("@bidid", value.BidID);
_cmd.Connection.Open();
_cmd.ExecuteNonQuery();
_cmd.Connection.Close();
_cmd.Connection.Dispose();
}
}
catch (Exception e)
{
throw new Exception(e.Message);
}
}

public virtual DataSet List(string filter)
{
DataSet result = new DataSet();

_command = new SqlCommand();
_command.Connection = this.Connection;
_command.CommandText = @"SELECT * FROM bids_view_listall
WHERE (clientname like @value) or (contactname like @value)
or (sponsor like @value) ORDER BY datecreated DESC";
_command.CommandType = CommandType.Text;

try
{
if (filter != null)
{
filter = filter.Replace(" ", "%");
}
sqlda.SelectCommand = _command;
sqlda.SelectCommand.Parameters.AddWithValue("@value", "%" + filter + "%");
sqlda.Fill(result);
}
catch (Exception e)
{
throw new Exception(e.Message);
}

return (DataSet)result;
}

#endregion

#region IBid Members

public string Client
{
get
{
return _Client;
}
set
{
_Client = value;
}
}

public string Contact
{
get
{
return _Contact;
}
set
{
_Contact = value;
}
}

public string Sponsor
{
get
{
return _Sponsor;
}
set
{
_Sponsor = value;
}
}

public string Priority
{
get
{
return _Priority;
}
set
{
_Priority = value;
}
}

public string BidStatus
{
get
{
return _BidStatus;
}
set
{
_BidStatus = value;
}
}

#endregion

#region Properties

public int BidID
{
get
{ return _BidID; }
set
{ _BidID = value; }
}

public string DateCreated
{
get
{
return _DateCreated;
}
set
{
_DateCreated = value;
}
}

public string CreatedBy
{
get
{
return _CreatedBy;
}
set
{
_CreatedBy = value;
}
}

#endregion

}

}

 _____________________________________________
 
Am I on a right path? I will greatly appreciate in any comments or suggestions for a design. I am creating an n-tier application and i don't know if my design is right. I dont have the proper schooling for creating this kind of applications and I am still on layer of data access and business logic.

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