public T Convert(IDataReader reader)
{
var item = default(T);
object boxed = item;
var columns = new GetColumns().From(reader);
var properties = typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public);
while (reader.Read())
{
foreach (var property in properties)
{
if (columns.Contains(property.Name))
{
object value = reader[property.Name];
// if dbnull change to c# null
if (value == DBNull.Value)
{
value = null;
}
property.SetValue(boxed, value);
}
}
item = (T)boxed;
break;
}
return(item);
}
public List <T> Convert(IDataReader reader)
{
var list = new List <T>();
var properties = typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public);
var columns = new GetColumns().From(reader);
while (reader.Read())
{
var item = System.Activator.CreateInstance <T>();
foreach (var property in properties)
{
if (columns.Contains(property.Name))
{
property.SetValue(item, reader[property.Name]);
}
}
list.Add(item);
}
return(list);
}
public List <T> Convert(IDataReader reader)
{
var list = new List <T>();
var properties = typeof(T).GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);
var columns = new GetColumns().From(reader);
while (reader.Read())
{
var item = default(T);
object obj = item; // box
foreach (var property in properties)
{
if (columns.Contains(property.Name))
{
property.SetValue(obj, reader[property.Name]);
}
}
item = (T)obj; // unbox
list.Add(item);
}
return(list);
}
public string BuildUpdateSql()
{
var tableName = this.tableName.Get(instance);
var properties = typeof(T).GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);
var tableColumns = new GetColumns().From(tableName, db, cache);
var setters = "";
var id = "0";
foreach (var property in properties)
{
if (property.Name.ToUpper() == "ID")
{
var objId = property.GetValue(instance);
id = objId == null ? "0" : objId.ToString();
//id = property.GetValue(instance).ToStringOr("0");
continue;
}
if (!tableColumns.Contains(property.Name))
{
continue;
}
var value = property.GetValue(instance);
if (value is null)
{
value = DBNull.Value;
}
setters += $"{property.Name} = @{property.Name}, ";
command.Parameters.AddWithValue("@" + property.Name, value);
}
setters = setters.Substring(0, setters.Length - 2);
var sql = $@"update [{tableName}] set {setters} where id = {id}";
return(sql);
}
public string BuildInsertSql()
{
var tableName = this.tableName.Get(instance);
var properties = typeof(T).GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);
var tableColumns = new GetColumns().From(tableName, db, cache);
var columnNames = "";
var values = "";
foreach (var property in properties)
{
if (property.Name.ToUpper() == "ID")
{
continue;
}
if (!tableColumns.Contains(property.Name))
{
continue;
}
var value = property.GetValue(instance);
if (value is null)
{
value = DBNull.Value;
}
columnNames += property.Name + ", ";
command.Parameters.AddWithValue("@" + property.Name, value);
values += "@" + property.Name + ", ";
}
columnNames = columnNames.Substring(0, columnNames.Length - 2);
values = values.Substring(0, values.Length - 2);
var sql = $@"INSERT INTO [{tableName}] ({columnNames}) VALUES ({values})
SELECT @@IDENTITY Id";
return(sql);
}
