how to create a DataAccessLayer ?
- by NIGHIL DAS
hi,
i am creating a database applicatin in .Net. I am using a DataAccessLayer for communicating .net objects with database but i am not sure that this class is correct or not Can anyone cross check it and rectify any mistakes
namespace IDataaccess
{
#region Collection Class
public class SPParamCollection : List<SPParams>
{
}
public class SPParamReturnCollection : List<SPParams>
{
}
#endregion
#region struct
public struct SPParams
{
public string Name
{
get;
set;
}
public object Value
{
get;
set;
}
public ParameterDirection ParamDirection
{
get;
set;
}
public SqlDbType Type
{
get;
set;
}
public int Size
{
get;
set;
}
public string TypeName
{
get;
set;
}
// public string datatype;
}
#endregion
/// <summary>
/// Interface DataAccess Layer implimentation New version
/// </summary>
public interface IDataAccess
{
DataTable getDataUsingSP(string spName);
DataTable getDataUsingSP(string spName, SPParamCollection spParamCollection);
DataSet getDataSetUsingSP(string spName);
DataSet getDataSetUsingSP(string spName, SPParamCollection spParamCollection);
SqlDataReader getDataReaderUsingSP(string spName);
SqlDataReader getDataReaderUsingSP(string spName, SPParamCollection spParamCollection);
int executeSP(string spName);
int executeSP(string spName, SPParamCollection spParamCollection, bool addExtraParmas);
int executeSP(string spName, SPParamCollection spParamCollection);
DataTable getDataUsingSqlQuery(string strSqlQuery);
int executeSqlQuery(string strSqlQuery);
SPParamReturnCollection executeSPReturnParam(string spName, SPParamReturnCollection spParamReturnCollection);
SPParamReturnCollection executeSPReturnParam(string spName, SPParamCollection spParamCollection, SPParamReturnCollection spParamReturnCollection);
SPParamReturnCollection executeSPReturnParam(string spName, SPParamCollection spParamCollection, SPParamReturnCollection spParamReturnCollection, bool addExtraParmas);
int executeSPReturnParam(string spName, SPParamCollection spParamCollection, ref SPParamReturnCollection spParamReturnCollection);
object getScalarUsingSP(string spName);
object getScalarUsingSP(string spName, SPParamCollection spParamCollection);
}
}
using IDataaccess;
namespace Dataaccess
{
/// <summary>
/// Class DataAccess Layer implimentation New version
/// </summary>
public class DataAccess : IDataaccess.IDataAccess
{
#region Public variables
static string Strcon;
DataSet dts = new DataSet();
public DataAccess()
{
Strcon = sReadConnectionString();
}
private string sReadConnectionString()
{
try
{
//dts.ReadXml("C:\\cnn.config");
//Strcon = dts.Tables[0].Rows[0][0].ToString();
//System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
//Strcon = config.ConnectionStrings.ConnectionStrings["connectionString"].ConnectionString;
// Add an Application Setting.
//Strcon = "Data Source=192.168.50.103;Initial Catalog=erpDB;User ID=ipixerp1;Password=NogoXVc3";
Strcon = System.Configuration.ConfigurationManager.AppSettings["connection"];
//Strcon = System.Configuration.ConfigurationSettings.AppSettings[0].ToString();
}
catch (Exception)
{
}
return Strcon;
}
public SqlConnection connection;
public SqlCommand cmd;
public SqlDataAdapter adpt;
public DataTable dt;
public int intresult;
public SqlDataReader sqdr;
#endregion
#region Public Methods
public DataTable getDataUsingSP(string spName)
{
return getDataUsingSP(spName, null);
}
public DataTable getDataUsingSP(string spName, SPParamCollection spParamCollection)
{
try
{
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(spName, connection))
{
int count, param = 0;
if (spParamCollection == null)
{ param = -1; }
else
{
param = spParamCollection.Count;
}
for (count = 0; count < param; count++)
{
cmd.Parameters.AddWithValue(spParamCollection[count].Name, spParamCollection[count].Value);
}
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandTimeout = 60;
adpt = new SqlDataAdapter(cmd);
dt = new DataTable();
adpt.Fill(dt);
return (dt);
}
}
}
finally
{
connection.Close();
}
}
public DataSet getDataSetUsingSP(string spName)
{
return getDataSetUsingSP(spName, null);
}
public DataSet getDataSetUsingSP(string spName, SPParamCollection spParamCollection)
{
try
{
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(spName, connection))
{
int count, param = 0;
if (spParamCollection == null)
{
param = -1;
}
else
{
param = spParamCollection.Count;
}
for (count = 0; count < param; count++)
{
cmd.Parameters.AddWithValue(spParamCollection[count].Name, spParamCollection[count].Value);
}
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandTimeout = 60;
adpt = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
adpt.Fill(ds);
return ds;
}
}
}
finally
{
connection.Close();
}
}
public SqlDataReader getDataReaderUsingSP(string spName)
{
return getDataReaderUsingSP(spName, null);
}
public SqlDataReader getDataReaderUsingSP(string spName, SPParamCollection spParamCollection)
{
try
{
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(spName, connection))
{
int count, param = 0;
if (spParamCollection == null)
{ param = -1; }
else
{
param = spParamCollection.Count;
}
for (count = 0; count < param; count++)
{
cmd.Parameters.AddWithValue(spParamCollection[count].Name, spParamCollection[count].Value);
}
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandTimeout = 60;
sqdr = cmd.ExecuteReader();
return (sqdr);
}
}
}
finally
{
connection.Close();
}
}
public int executeSP(string spName)
{
return executeSP(spName, null);
}
public int executeSP(string spName, SPParamCollection spParamCollection, bool addExtraParmas)
{
try
{
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(spName, connection))
{
int count, param = 0;
if (spParamCollection == null)
{ param = -1; }
else
{
param = spParamCollection.Count;
}
for (count = 0; count < param; count++)
{
SqlParameter par = new SqlParameter(spParamCollection[count].Name, spParamCollection[count].Value);
if (addExtraParmas)
{
par.TypeName = spParamCollection[count].TypeName;
par.SqlDbType = spParamCollection[count].Type;
}
cmd.Parameters.Add(par);
}
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandTimeout = 60;
return (cmd.ExecuteNonQuery());
}
}
}
finally
{
connection.Close();
}
}
public int executeSP(string spName, SPParamCollection spParamCollection)
{
return executeSP(spName, spParamCollection, false);
}
public DataTable getDataUsingSqlQuery(string strSqlQuery)
{
try
{
using (connection = new SqlConnection(Strcon))
connection.Open();
{
using (cmd = new SqlCommand(strSqlQuery, connection))
{
cmd.CommandType = CommandType.Text;
cmd.CommandTimeout = 60;
adpt = new SqlDataAdapter(cmd);
dt = new DataTable();
adpt.Fill(dt);
return (dt);
}
}
}
finally
{
connection.Close();
}
}
public int executeSqlQuery(string strSqlQuery)
{
try
{
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(strSqlQuery, connection))
{
cmd.CommandType = CommandType.Text;
cmd.CommandTimeout = 60;
intresult = cmd.ExecuteNonQuery();
return (intresult);
}
}
}
finally
{
connection.Close();
}
}
public SPParamReturnCollection executeSPReturnParam(string spName, SPParamReturnCollection spParamReturnCollection)
{
return executeSPReturnParam(spName, null, spParamReturnCollection);
}
public int executeSPReturnParam()
{
return 0;
}
public int executeSPReturnParam(string spName, SPParamCollection spParamCollection, ref SPParamReturnCollection spParamReturnCollection)
{
try
{
SPParamReturnCollection spParamReturned = new SPParamReturnCollection();
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(spName, connection))
{
int count, param = 0;
if (spParamCollection == null)
{ param = -1; }
else
{
param = spParamCollection.Count;
}
for (count = 0; count < param; count++)
{
cmd.Parameters.AddWithValue(spParamCollection[count].Name, spParamCollection[count].Value);
}
cmd.CommandType = CommandType.StoredProcedure;
foreach (SPParams paramReturn in spParamReturnCollection)
{
SqlParameter _parmReturn = new SqlParameter(paramReturn.Name, paramReturn.Size);
_parmReturn.Direction = paramReturn.ParamDirection;
if (paramReturn.Size > 0) _parmReturn.Size = paramReturn.Size;
else _parmReturn.Size = 32;
_parmReturn.SqlDbType = paramReturn.Type;
cmd.Parameters.Add(_parmReturn);
}
cmd.CommandTimeout = 60;
intresult = cmd.ExecuteNonQuery();
connection.Close();
//for (int i = 0; i < spParamReturnCollection.Count; i++)
//{
// spParamReturned.Add(new SPParams
// {
// Name = spParamReturnCollection[i].Name,
// Value = cmd.Parameters[spParamReturnCollection[i].Name].Value
// });
//}
}
}
return intresult;
}
finally
{
connection.Close();
}
}
public SPParamReturnCollection executeSPReturnParam(string spName, SPParamCollection spParamCollection, SPParamReturnCollection spParamReturnCollection)
{
return executeSPReturnParam(spName, spParamCollection, spParamReturnCollection, false);
}
public SPParamReturnCollection executeSPReturnParam(string spName, SPParamCollection spParamCollection, SPParamReturnCollection spParamReturnCollection, bool addExtraParmas)
{
try
{
SPParamReturnCollection spParamReturned = new SPParamReturnCollection();
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(spName, connection))
{
int count, param = 0;
if (spParamCollection == null)
{ param = -1; }
else
{
param = spParamCollection.Count;
}
for (count = 0; count < param; count++)
{
//cmd.Parameters.AddWithValue(spParamCollection[count].Name, spParamCollection[count].Value);
SqlParameter par = new SqlParameter(spParamCollection[count].Name, spParamCollection[count].Value);
if (addExtraParmas)
{
par.TypeName = spParamCollection[count].TypeName;
par.SqlDbType = spParamCollection[count].Type;
}
cmd.Parameters.Add(par);
}
cmd.CommandType = CommandType.StoredProcedure;
foreach (SPParams paramReturn in spParamReturnCollection)
{
SqlParameter _parmReturn = new SqlParameter(paramReturn.Name, paramReturn.Value);
_parmReturn.Direction = paramReturn.ParamDirection;
if (paramReturn.Size > 0) _parmReturn.Size = paramReturn.Size;
else _parmReturn.Size = 32;
_parmReturn.SqlDbType = paramReturn.Type;
cmd.Parameters.Add(_parmReturn);
}
cmd.CommandTimeout = 60;
cmd.ExecuteNonQuery();
connection.Close();
for (int i = 0; i < spParamReturnCollection.Count; i++)
{
spParamReturned.Add(new SPParams
{
Name = spParamReturnCollection[i].Name,
Value = cmd.Parameters[spParamReturnCollection[i].Name].Value
});
}
}
}
return spParamReturned;
}
catch (Exception ex)
{
return null;
}
finally
{
connection.Close();
}
}
public object getScalarUsingSP(string spName)
{
return getScalarUsingSP(spName, null);
}
public object getScalarUsingSP(string spName, SPParamCollection spParamCollection)
{
try
{
using (connection = new SqlConnection(Strcon))
{
connection.Open();
using (cmd = new SqlCommand(spName, connection))
{
int count, param = 0;
if (spParamCollection == null)
{ param = -1; }
else
{
param = spParamCollection.Count;
}
for (count = 0; count < param; count++)
{
cmd.Parameters.AddWithValue(spParamCollection[count].Name, spParamCollection[count].Value);
cmd.CommandTimeout = 60;
}
cmd.CommandType = CommandType.StoredProcedure;
return cmd.ExecuteScalar();
}
}
}
finally
{
connection.Close();
cmd.Dispose();
}
}
#endregion
}
}
