Transaction Management in asp.net - asp.net

Question

I am doing a web application in asp.net.
I have a class CommonDB to save data.
public class CommonDB
{
private static string GetConnectionString = ConfigurationManager.ConnectionStrings["Db"].ToString();
public static SqlConnection GetConnection()
{
SqlConnection Con = new SqlConnection(GetConnectionString);
if (Con.State == ConnectionState.Open)
{
Con.Close();
}
return Con;
}
public static int ExecuteNonquery(SqlCommand cmd)
{
SqlConnection Con = GetConnection();
Con.Open();
try
{
cmd.Connection = Con;
Con.Close();
return ReturnVal;
}
catch
{
Con.Close();
return 0;
}
}
}
}
I am using the following function to save data
public int AddGroupMaster() //Inserting
{
try
{
SqlCommand cmd = new SqlCommand();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "NV_Group_Master_Add";
cmd.Parameters.AddWithValue("#Group_ID", iGroupId);
cmd.Parameters.AddWithValue("#Group_Code", strGroupName);
cmd.Parameters.AddWithValue("#Group_Name", strGroupName);
cmd.Parameters.AddWithValue("#Created_On", strCreatedOn);
cmd.Parameters.AddWithValue("#Modified_On", strModifiedOn);
iReturn = CommonDB.ExecuteNonquery(cmd);
return iReturn;
}
catch { return 0; }
}
This function is called from code behind like :
protected void btnSave_Click(object sender, EventArgs e)
{
try
{
objGroup.strGroupName = txtGroupName.Text.Trim();
objGroup.strCreatedOn = DateTime.Today.ToString();
objGroup.strModifiedOn = "";
objGroup.AddGroupMaster();
}
catch
{
}
}
I want to use Commit and rollback. How it is possible in my coding??
Please suggest a solution

Answer 1

In your scenario, you will have to do that in your CommonDB library.
For example, your ExecuteNonQuery method would look like this:
public static int ExecuteNonquery(SqlCommand cmd) {
int retVal;
SqlConnection Con = GetConnection();
DbTransaction tran;
try {
cmd.Connection = Con;
cmd.Connection.Open();
tran = cmd.Connection.BeginTransaction;
cmd.Transaction = tran;
retVal = cmd.ExecuteNonQuery;
tran.Commit()
} catch {
tran.Rollback();
throw;
} finally {
cmd.Connection.Close()
}
return retVal;
}
And yes, do not forget to get a reference to System.Data.Common.