public static BoolResult <TEntity> RefToSingle <TEntity>(this DataBase db, string strSql, params IDataParameter[] parameters) where TEntity : class, new()
{
ValidationResults validationResults = new ValidationResults();
TEntity item = default(TEntity);
IDataReader dataReader = null;
try
{
dataReader = db.ExecuteReader(db.ConnectionString, CommandType.Text, strSql, parameters);
DynamicBuilder <TEntity> dynamicBuilder = DynamicBuilder <TEntity> .CreateBuilder(dataReader);
if (dataReader.Read())
{
item = dynamicBuilder.Build(dataReader);
}
}
catch (Exception ex)
{
validationResults.Add(ex.Message);
}
finally
{
if (dataReader != null)
{
dataReader.Close();
}
}
return(new BoolResult <TEntity>(item, validationResults.IsValid, string.Empty, validationResults));
}
public static BoolResult <IList <TEntity> > RefSPToList <TEntity>(this DataBase db, string spName, params IDataParameter[] parameters) where TEntity : class, new()
{
ValidationResults validationResults = new ValidationResults();
IList <TEntity> list = new List <TEntity>();
IDataReader dataReader = null;
try
{
dataReader = db.ExecuteSPReader(db.ConnectionString, spName, parameters);
DynamicBuilder <TEntity> dynamicBuilder = DynamicBuilder <TEntity> .CreateBuilder(dataReader);
while (dataReader.Read())
{
TEntity item = dynamicBuilder.Build(dataReader);
list.Add(item);
}
}
catch (Exception ex)
{
validationResults.Add(ex.Message);
}
finally
{
if (dataReader != null)
{
dataReader.Close();
}
}
return(new BoolResult <IList <TEntity> >(list, validationResults.IsValid, string.Empty, validationResults));
}
public static DynamicBuilder <T> CreateBuilder(IDataRecord dataRecord)
{
Type typeFromHandle = typeof(T);
DynamicBuilder <T> dynamicBuilder = new DynamicBuilder <T>();
DynamicMethod dynamicMethod = new DynamicMethod("DynamicCreate", typeFromHandle, new Type[]
{
typeof(IDataRecord)
}, typeFromHandle, true);
ILGenerator iLGenerator = dynamicMethod.GetILGenerator();
LocalBuilder local = iLGenerator.DeclareLocal(typeFromHandle);
iLGenerator.Emit(OpCodes.Newobj, typeFromHandle.GetConstructor(Type.EmptyTypes));
iLGenerator.Emit(OpCodes.Stloc, local);
for (int i = 0; i < dataRecord.FieldCount; i++)
{
PropertyInfo property = typeFromHandle.GetProperty(dataRecord.GetName(i));
Label label = iLGenerator.DefineLabel();
if (property != null && property.GetSetMethod() != null)
{
iLGenerator.Emit(OpCodes.Ldarg_0);
iLGenerator.Emit(OpCodes.Ldc_I4, i);
iLGenerator.Emit(OpCodes.Callvirt, DynamicBuilder <T> .isDBNullMethod);
iLGenerator.Emit(OpCodes.Brtrue, label);
iLGenerator.Emit(OpCodes.Ldloc, local);
iLGenerator.Emit(OpCodes.Ldarg_0);
iLGenerator.Emit(OpCodes.Ldc_I4, i);
iLGenerator.Emit(OpCodes.Callvirt, DynamicBuilder <T> .getValueMethod);
bool flag = false;
if (property.PropertyType.Name.ToLower().Contains("nullable"))
{
flag = true;
}
Type fieldType = dataRecord.GetFieldType(i);
if (flag)
{
iLGenerator.Emit(OpCodes.Unbox_Any, DynamicBuilder <T> .types[fieldType]);
}
else
{
iLGenerator.Emit(OpCodes.Unbox_Any, fieldType);
}
iLGenerator.Emit(OpCodes.Callvirt, property.GetSetMethod());
iLGenerator.MarkLabel(label);
}
}
iLGenerator.Emit(OpCodes.Ldloc, local);
iLGenerator.Emit(OpCodes.Ret);
dynamicBuilder.handler = (DynamicBuilder <T> .Load)dynamicMethod.CreateDelegate(typeof(DynamicBuilder <T> .Load));
return(dynamicBuilder);
}
