public string BulkInsertCmd <T>(List <T> items)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.AppendLine($"INSERT INTO {typeof(T).Name}({BulkHelper.CommaSeparatedPropertiesNameFromType(typeof(T))})");
items.ForEach(item =>
{
stringBuilder.AppendLine($"SELECT {BulkHelper.CommaSeparatedPropertiesValueFromObject(item)}{BulkHelper.CmdLineDelimiter(items, item)}");
});
return(stringBuilder.ToString());
}
public string BulkDeleteCmd <T>(List <T> items, Expression <Func <T, int> > entityPropertyName) where T : class
{
string targetPropertyName = BulkHelper.GetPropertyName(entityPropertyName);
var ids = items.Select(i =>
BulkHelper.PropertiesToSql(i)
.Where(w => w.Name == targetPropertyName)
.Select(s => s.GetValue(i))
.FirstOrDefault()
)
.ToList()
.Where(w => w != null)
.ToList();
string cmd = default(string);
if (ids.Count > 0)
{
cmd = $"DELETE FROM {typeof(T).Name} WHERE {targetPropertyName} IN ({String.Join(",", ids)});";
}
return(cmd);
}
