public DataTable GetDataTable(IList items)
{
DataTable dt = new DataTable();
//Primero construimos el esquema a partir del primer elemento
if (items.Count > 0)
{
dt = this.ConstructDataTableSchema(items[0]);
if (dt != null)
{
// Creamos una fila por cada item de la lista
for (int i = 0; i < items.Count; i++)
{
DataRow dr = dt.NewRow();
Type type = items[i].GetType();
MemberInfo[] members = type.GetProperties();
foreach (MemberInfo member in members)
{
object[] attributes = member.GetCustomAttributes(true);
if (attributes.Length != 0)
{
foreach (object attribute in attributes)
{
DataTableConversionAttribute ca = attribute as
DataTableConversionAttribute;
if (ca != null)
{
if (ca.DataTableConversion)
{
string[] nameArray = member.Name.ToString().Split(Convert.ToChar(" "));
PropertyInfo prop = type.GetProperty(nameArray[0]);
Type valueType = prop.GetValue(items[i], null).GetType();
dr[nameArray[0]] = prop.GetValue(items[i], null);
}
}
}
}
}
dt.Rows.Add(dr);
}
}
}
return(dt);
}
private DataTable ConstructDataTableSchema(object item)
{
string tableName = string.Empty;
ArrayList schemaContainers = new ArrayList();
Type type = item.GetType();
MemberInfo[] members = type.GetProperties();
foreach (MemberInfo member in members)
{
object[] attributes = member.GetCustomAttributes(true);
if (attributes.Length != 0)
{
foreach (object attribute in attributes)
{
DataTableConversionAttribute ca = attribute as DataTableConversionAttribute;
if (ca != null)
{
if (ca.DataTableConversion)
{
//Usamos el nombre de la calse como nombre del DataTable resultado
string[] classNameArray = member.ReflectedType.ToString().Split(Convert.ToChar("."));
tableName = classNameArray[classNameArray.Length - 1];
string name = member.Name.ToString();
PropertyInfo prop = type.GetProperty(name);
Type valueType = prop.GetValue(item, null).GetType();
schemaContainers.Add(new DataTableConverterContainer(name,
valueType, ca.AllowDbNull, ca.KeyField));
}
}
}
}
}
if (schemaContainers.Count > 0)
{
DataTable dataTable = new DataTable(tableName);
DataColumn[] dataColumn = new DataColumn[schemaContainers.Count];
// Cuento la cantidad de columnas que forman parte de la clave de la tabla
int totalNumberofKeys = 0;
foreach (DataTableConverterContainer container in schemaContainers)
{
if (container.IsKey == true && _enforceKeys == true)
{
totalNumberofKeys = totalNumberofKeys + 1;
}
}
// Armo las columnas
DataColumn[] keyColumnArray = new DataColumn[totalNumberofKeys];
int keyColumnIndex = 0;
for (int i = 0; i < schemaContainers.Count; i++)
{
dataColumn[i] = new DataColumn();
dataColumn[i].DataType = ((DataTableConverterContainer)schemaContainers[i]).PropertyType;
dataColumn[i].ColumnName = ((DataTableConverterContainer)schemaContainers[i]).PropertyName;
dataColumn[i].AllowDBNull = ((DataTableConverterContainer)schemaContainers[i]).AllowDbNull;
dataTable.Columns.Add(dataColumn[i]);
if (((DataTableConverterContainer)schemaContainers[i]).IsKey == true && _enforceKeys == true)
{
keyColumnArray[keyColumnIndex] = dataColumn[i];
keyColumnIndex = keyColumnIndex + 1;
}
}
if (_enforceKeys)
{
dataTable.PrimaryKey = keyColumnArray;
}
return(dataTable);
}
return(null);
}
