/// <summary>
/// 4.x扩展修改方法（把不须要修改的列用LAMBDA数组表示出来）
/// </summary>
/// <param name="model">要修改的实体对象</param>
/// <param name="ignoreProperties">不须要修改的相关字段</param>
/// <returns>受影响的行数</returns>
public int UpdateEntity(T model, params Expression <Func <T, object> >[] ignoreProperties)
{
int iret = -1;
//Logger("修改" + typeof(T).Name + "中的数据", () =>
//{
using (DbContext db = new Model.Entities()) //DBContextFactory().GetDbContext()
{
db.Entry <T>(model).State = EntityState.Detached;
db.Set <T>().Attach(model);
DbEntityEntry entry = db.Entry <T>(model);
entry.State = System.Data.EntityState.Unchanged;
Type t = typeof(T);
List <PropertyInfo> proInfos = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).ToList();
Dictionary <string, PropertyInfo> dicPros = new Dictionary <string, PropertyInfo>();
proInfos.ForEach(
p => dicPros.Add(p.Name, p)
);
if (ignoreProperties != null)
{
foreach (var ignorePropertyExpression in ignoreProperties)
{
//根据表达式得到对应的字段信息
var ignorePropertyName = new PropertyExpressionParser <T>(ignorePropertyExpression).Name;
dicPros.Remove(ignorePropertyName);
}
}
foreach (string proName in dicPros.Keys)
{
entry.Property(proName).IsModified = true;
}
iret = db.SaveChanges();
}
return(iret);
}
/// <summary>
/// 修改实
/// </summary>
/// <param name="entity">修改对象</param>
/// <param name="pNas">要修改的属性名称集体</param>
/// <returns></returns>
public int UpdateEntity(T entity, params string[] pNas)
{
try
{
using (DbContext _dbx = new Model.Entities())
{
_dbx.Entry <T>(entity).State = EntityState.Detached;//oracle数据库没这一句不能修改
DbEntityEntry upEntity = _dbx.Entry <T>(entity);
upEntity.State = System.Data.EntityState.Unchanged;
foreach (string pNa in pNas)
{
upEntity.Property(pNa).IsModified = true;
}
return(_dbx.SaveChanges());
}
}
catch (Exception ex)
{
throw ex;
}
}