public string Delete(string fileName, Object obj)
{
string delete = "DELETE FROM " + library + "." + fileName + " WHERE ";
string whereCondition = "";
string query = "";
Type firstType = obj.GetType();
foreach (PropertyInfo propertyInfo in firstType.GetProperties())
{
object[] attrs = propertyInfo.GetCustomAttributes(true);
DBFieldAttribute dbField = null;
PrimaryKeyAttribute pkField = null;
foreach (object attr in attrs)
{
dbField = (attr as DBFieldAttribute) != null ? attr as DBFieldAttribute : dbField;
pkField = (attr as PrimaryKeyAttribute) != null ? attr as PrimaryKeyAttribute : pkField;
}
if (dbField != null && (propertyInfo.GetValue(obj, null).ToString() != "" && propertyInfo.GetValue(obj, null).ToString() != "0" && propertyInfo.GetValue(obj, null).ToString() != "''") && pkField == null)
{
string value = propertyInfo.PropertyType == typeof(string) ? "'" + propertyInfo.GetValue(obj, null).ToString() + "'" : propertyInfo.GetValue(obj, null).ToString();
string condition = dbField.FieldName + "=" + value;
condition = whereCondition == "" ? " " + condition : " AND " + condition;
whereCondition += condition;
}
else if (dbField != null && (propertyInfo.GetValue(obj, null).ToString() != "" && propertyInfo.GetValue(obj, null).ToString() != "0" && propertyInfo.GetValue(obj, null).ToString() != "''") && pkField != null)
{
string value = propertyInfo.PropertyType == typeof(string) ? "'" + propertyInfo.GetValue(obj, null).ToString() + "'" : propertyInfo.GetValue(obj, null).ToString();
string condition = dbField.FieldName + "=" + value;
condition = whereCondition == "" ? " " + condition : " AND " + condition;
whereCondition += condition;
}
}
query = delete + whereCondition;
int success = -1;
try
{
dbConnection.cmd.CommandText = query;
dbConnection.cmd.CommandType = System.Data.CommandType.Text;
success = dbConnection.cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.RollBack();
}
return(ex.Message + " - Query :" + query);
}
finally
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.Commit();
}
}
return((success == 1) ? "Ok - Query :" + query : "Error - Query :" + query);
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="rdr"></param>
/// <returns></returns>
public T GetItemFromReader <T>(OdbcDataReader rdr) where T : class
{
Type type = typeof(T);
T item = Activator.CreateInstance <T>();
PropertyInfo[] properties = type.GetProperties();
foreach (PropertyInfo property in properties)
{
Type type1 = property.ReflectedType;
// for each property declared in the type provided check if the property is
// decorated with the DBField attribute
if (Attribute.IsDefined(property, typeof(DBFieldAttribute)))
{
DBFieldAttribute attrib = (DBFieldAttribute)Attribute.GetCustomAttribute(property, typeof(DBFieldAttribute));
try
{
if (Convert.IsDBNull(rdr[attrib.FieldName])) // data in database is null, so do not set the value of the property
{
continue;
}
}
catch (Exception)
{
continue;
}
if (property.PropertyType == rdr[attrib.FieldName].GetType()) // if the property and database field are the same
{
property.SetValue(item, rdr[attrib.FieldName], null); // set the value of property
}
else
{
try
{
property.SetValue(item, Convert.ChangeType(rdr[attrib.FieldName], property.PropertyType), null);
}
catch (Exception)
{
property.SetValue(item, rdr[attrib.FieldName].ToString().Trim(), null);
}
// change the type of the data in table to that of property and set the value of the property
// for SQL attrib.FieldName canbe modified as ( "@" +attrib.FieldName)
}
}
}
return(item);
}
public string Insert(string fileName, Object obj)
{
string query = "INSERT INTO " + library + "." + fileName + " ";
string fields = "( ";
string values = " VALUES ( ";
Type firstType = obj.GetType();
foreach (PropertyInfo propertyInfo in firstType.GetProperties())
{
// populating firld name list
DBFieldAttribute dbField = null;
PrimaryKeyAttribute primary = null;
object[] attrs = propertyInfo.GetCustomAttributes(true);
foreach (object attr in attrs)
{
dbField = (attr as DBFieldAttribute) != null ? attr as DBFieldAttribute : dbField;
primary = (attr as PrimaryKeyAttribute) != null ? attr as PrimaryKeyAttribute : primary;
}
decimal recCount = 0;
decimal pkId = 0;
try
{
dbConnection.cmd.CommandText = "Select COUNT(*) from " + library + "." + fileName;
recCount = decimal.Parse(dbConnection.cmd.ExecuteScalar().ToString());
}
catch (Exception ex)
{
}
if (primary != null && dbField != null & recCount > 0)
{
try
{
dbConnection.cmd.CommandText = "select max(" + dbField.FieldName + ")+1 from " + library + "." + fileName;
pkId = decimal.Parse(dbConnection.cmd.ExecuteScalar().ToString());
}
catch (Exception ex)
{
pkId = 0;
}
}
string value = (propertyInfo.PropertyType == typeof(decimal)) ? propertyInfo.GetValue(obj, null).ToString() : "'" + propertyInfo.GetValue(obj, null) + "'";
if (dbField != null & primary == null && value != "0" && value != "" && value != "''")
{
fields = fields == "( " ? (fields + dbField.FieldName) : (fields + "," + dbField.FieldName);
values = values == " VALUES ( " ? values + value : values + " , " + value;
}
else if (dbField != null & primary != null)
{
fields = fields == "( " ? (fields + dbField.FieldName) : (fields + "," + dbField.FieldName);
string primaryKey = (propertyInfo.PropertyType == typeof(decimal)) ? pkId.ToString() : "'" + pkId.ToString() + "'";
values = values == " VALUES ( " ? values + primaryKey : values + " , " + primaryKey;
}
}
query = "INSERT INTO " + library + "." + fileName + " " + fields + " ) " + values + " )";
int success = -1;
try
{
dbConnection.cmd.CommandText = query;
dbConnection.cmd.CommandType = System.Data.CommandType.Text;
success = dbConnection.cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.RollBack();
}
return(ex.Message + " - Query :" + query);
}
finally
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.Commit();
}
}
return((success == 1) ? "Ok - Query:" + query : "Error - Query:" + query);
}
public List <T> Select <T>(string fileName, Object obj) where T : class
{
string select = "SELECT * FROM " + library + "." + fileName;
string whereCondition = "";
string query = "";
Type firstType = obj.GetType();
List <T> list = new List <T>();
DataAccessObject dataAccessObject = new DataAccessObject();
foreach (PropertyInfo propertyInfo in firstType.GetProperties())
{
object[] attrs = propertyInfo.GetCustomAttributes(true);
DBFieldAttribute dbField = null;
PrimaryKeyAttribute pkField = null;
foreach (object attr in attrs)
{
dbField = (attr as DBFieldAttribute) != null ? attr as DBFieldAttribute : dbField;
}
if (dbField != null && (propertyInfo.GetValue(obj, null).ToString() != "" && propertyInfo.GetValue(obj, null).ToString() != "0"))
{
string value = propertyInfo.PropertyType == typeof(string) ? "'" + propertyInfo.GetValue(obj, null).ToString() + "'" : propertyInfo.GetValue(obj, null).ToString();
string condition = dbField.FieldName + "=" + value;
condition = whereCondition == "" ? " " + condition : " AND " + condition;
whereCondition += condition;
}
else if (dbField != null && (propertyInfo.GetValue(obj, null).ToString() != "" && pkField != null))
{
string value = propertyInfo.PropertyType == typeof(string) ? "'" + propertyInfo.GetValue(obj, null).ToString() + "'" : propertyInfo.GetValue(obj, null).ToString();
string condition = dbField.FieldName + "=" + value;
condition = whereCondition == "" ? " " + condition : " AND " + condition;
whereCondition += condition;
}
}
whereCondition = whereCondition != "" ? " WHERE " + whereCondition : whereCondition;
query = select + whereCondition;
dbConnection.cmd.CommandText = query;
dbConnection.cmd.CommandType = System.Data.CommandType.Text;
try
{
using (dbConnection.dr = dbConnection.cmd.ExecuteReader())
{
list = dataAccessObject.ReadCollection <T>(dbConnection.dr);
}
}
catch (Exception ex)
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.RollBack();
}
return(new List <T>());
}
finally
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.Commit();
}
}
return(list);
}
public string UpdateAllFields(string fileName, Object obj)
{
string update = "UPDATE " + library + "." + fileName;
string setValues = "";
string whereCondition = "";
string query = "";
Type firstType = obj.GetType();
foreach (PropertyInfo propertyInfo in firstType.GetProperties())
{
// populating firld name list
DBFieldAttribute dbField = null;
PrimaryKeyAttribute primaryKey = null;
string value = (propertyInfo.PropertyType == typeof(decimal)) ? propertyInfo.GetValue(obj, null).ToString() : "'" + propertyInfo.GetValue(obj, null) + "'";
// Go through each attribute of the property
object[] attrs = propertyInfo.GetCustomAttributes(true);
foreach (object attr in attrs)
{
dbField = (attr as DBFieldAttribute) != null ? attr as DBFieldAttribute : dbField;
primaryKey = (attr as PrimaryKeyAttribute) != null ? attr as PrimaryKeyAttribute : primaryKey;
}
if (primaryKey != null && primaryKey.IsPrimary)
{
whereCondition = dbField.FieldName + "=" + value;
continue;
}
if (dbField != null)
{
string updateValue = dbField.FieldName + "=" + value;
updateValue = setValues == "" ? updateValue : " , " + updateValue;
setValues += updateValue;
}
}
setValues = setValues != "" ? " SET " + setValues : setValues;
whereCondition = whereCondition != "" ? " WHERE " + whereCondition : whereCondition;
query = update + setValues + whereCondition;
dbConnection.cmd.CommandText = query;
dbConnection.cmd.CommandType = System.Data.CommandType.Text;
int success = -1;
try
{
success = dbConnection.cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.RollBack();
}
return(ex.Message + " - Query :" + query);
}
finally
{
if (dbConnection.con.State == System.Data.ConnectionState.Open)
{
dbConnection.Commit();
}
}
return("Ok - Query :" + query);
}
