public static DataTable GetDataReader <T>(this DbContext context, IEnumerable <T> entities)
{
var propertyMaps = context.Db <T>().Properties;
var table = propertyMaps.CreateTable();
var columns = propertyMaps.Select(o => new
{
o.ColumnName,
GetValue = o.IsDiscriminator
? x => typeof(T).Name
: ExpressHelper.GetPropGetter <T>(o.PropertyName).Compile()
}).ToArray();
foreach (var entity in entities)
{
var dataRow = table.Rows.Add();
foreach (var column in columns)
{
dataRow[column.ColumnName] = column.GetValue(entity) ?? DBNull.Value;
}
}
return(table);
}
private static DataTable GetDataTable <T>(this IContextAdapter contextAdapter, IEnumerable <T> entities)
{
var propertyMaps = contextAdapter.GetProperties <T>().ToArray();
var table = propertyMaps.CreateTable();
var columns = propertyMaps.Select(o => new
{
o.ColumnName,
GetValue = o.IsDiscriminator
? x => contextAdapter.GetDiscriminatorValue(x.GetType())
: ExpressHelper.GetPropGetter <T>(o.PropertyName).Compile(),
o.ValueTransform
}).ToArray();
foreach (var entity in entities)
{
var dataRow = table.Rows.Add();
foreach (var column in columns)
{
dataRow[column.ColumnName] = column.ValueTransform(column.GetValue(entity)) ?? DBNull.Value;
}
}
return(table);
}