public override ISqlParam Insert()
{
base.Insert();
// 主键如果有值，则需要 SET IDENTITY_INSERT ON
if (ExpBuilder.Map.FieldMap.PrimaryState.Key != null && !string.IsNullOrWhiteSpace(ExpBuilder.Map.FieldMap.PrimaryState.Value.FieldAtt.Name))
{
var indexHaveValue = new GetMemberVisitor().Visit(ExpBuilder.ExpAssign).Any(o => o.Member as PropertyInfo == ExpBuilder.Map.FieldMap.PrimaryState.Key);
if (indexHaveValue)
{
Sql.AppendFormat("SET IDENTITY_INSERT {0} ON ; {1} ; SET IDENTITY_INSERT {0} OFF;", Name, Sql);
}
}
return(this);
}
/// <summary>
/// 合并NewExpression
/// </summary>
/// <param name="exps">要合并的NewExpression</param>
public static Expression MergeNewExpression(params Expression[] exps)
{
// 获取表达式树中实体类型
var parentType = new GetParamVisitor().Visit(exps[0]).Select(o => o.Type).First();
// 取得所有PropertyInfo
var lst = new GetMemberVisitor().Visit(exps).Select(o => (PropertyInfo)o.Member);
// 构造函数参数类型
var lstPropertyType = lst.Select(o => o.PropertyType).ToArray();
// 根据取得的PropertyInfo列表，创建新类型
var classType = CacheManger.CreateClass(null, lstPropertyType, parentType);
// 获取新类型的构造函数
var constructor = classType.GetConstructor(lstPropertyType);
// 创建构造函数的参数表达式数组
var constructorParam = BuildConstructorsParameters(classType, lst);
return(Expression.New(constructor, constructorParam));
}
