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@coldhawaiian
Forked from jferguson/gist:1681480
Created October 16, 2015 12:29
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SqlBulkCopy Generic List<T>
public static void BulkInsert<T>(string connection, string tableName, IList<T> list)
{
using (var bulkCopy = new SqlBulkCopy(connection))
{
bulkCopy.BatchSize = list.Count;
bulkCopy.DestinationTableName = tableName;
var table = new DataTable();
var props = TypeDescriptor.GetProperties(typeof(T))
//Dirty hack to make sure we only have system data types
//i.e. filter out the relationships/collections
.Cast<PropertyDescriptor>()
.Where(propertyInfo => propertyInfo.PropertyType.Namespace.Equals("System"))
.ToArray();
foreach (var propertyInfo in props)
{
bulkCopy.ColumnMappings.Add(propertyInfo.Name, propertyInfo.Name);
table.Columns.Add(propertyInfo.Name, Nullable.GetUnderlyingType(propertyInfo.PropertyType) ?? propertyInfo.PropertyType);
}
var values = new object[props.Length];
foreach (var item in list)
{
for (var i = 0; i < values.Length; i++)
{
values[i] = props[i].GetValue(item);
}
table.Rows.Add(values);
}
bulkCopy.WriteToServer(table);
}
}
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