public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
public class SQLDAL:IDAL
{
public IList<Model> GetCategories()
{
IList<Model> categories = new List<Model>();
using (SqlDataReader rdr = DBUtility.ExecuteReader(DBUtility.ConnectStr, CommandType.Text, "select * from Category", null))
{
while (rdr.Read())
{
Model cat = new Model(rdr.GetString(0), rdr.GetString(1), rdr.GetString(2));
categories.Add(cat);
}
}
return categories;
}
public Model GetCategory(string categoryId)
{
Model category = null;
SqlParameter parm = new SqlParameter("@categoryid", SqlDbType.VarChar, 10);
parm.Value = categoryId;
using (SqlDataReader rdr = DBUtility.ExecuteReader(DBUtility.ConnectStr, CommandType.Text, "select * from Category where categoryid=@categoryid", parm))
{
if (rdr.Read())
category = new Model(rdr.GetString(0), rdr.GetString(1), rdr.GetString(2));
else
category = new Model();
}
return category;
}
}
public interface IDAL
{
IList<Model> GetCategories();
Model GetCategory(string categoryId);
}
public class Model
{
private string categoryid;
private string categoryname;
private string categorytemp;
public Model()
{}
public Model(string categoryid,string categoryname,string categorytemp) {
this.categoryid = categoryid;
this.categoryname = categoryname;
this.categorytemp = categorytemp;
}
public string CategoryId
{
get { return this.categoryid; }
}
public string CategoryName
{
get { return this.categoryname; }
}
public string CategoryTemp
{
get { return this.categorytemp; }
}
}
public abstract class DBUtility
{
public static readonly string ConnectStr = "server=.;uid=sa;pwd=";
private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) {
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connectionString)) {
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) {
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) {
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) {
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connectionString);
try {
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch {
conn.Close();
throw;
}
}
public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) {
SqlCommand cmd = new SqlCommand();
using (SqlConnection connection = new SqlConnection(connectionString)) {
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) {
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters) {
parmCache[cacheKey] = commandParameters;
}
public static SqlParameter[] GetCachedParameters(string cacheKey) {
SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
if (cachedParms == null)
return null;
SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
for (int i = 0, j = cachedParms.Length; i < j; i++)
clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
return clonedParms;
}
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms) {
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null) {
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
}