/// <summary>
/// 更新
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
public async Task <bool> UpdateAsync(TEntity entity)
{
using (var ctx = new OpsManageDbContext())
{
ctx.Set <TEntity>().Update(entity);
return(await ctx.SaveChangesAsync() > 0);
}
}
/// <summary>
/// 删除(按条件)
/// </summary>
/// <param name="predicate"></param>
/// <returns></returns>
public async Task <bool> RemoveAsync(Expression <Func <TEntity, bool> > predicate)
{
using (var ctx = new OpsManageDbContext())
{
var entity = ctx.Set <TEntity>();
var items = await entity.Where(predicate).ToListAsync();
entity.RemoveRange(items);
return(await ctx.SaveChangesAsync() > 0);
}
}
/// <summary>
/// 跟新指定的字段
/// </summary>
/// <param name="entity"></param>
/// <param name="propertyExpression"></param>
/// <returns></returns>
public async Task <bool> UpdateSpecificPropertyAsync(TEntity entity, params Expression <Func <TEntity, Object> >[] propertyExpression)
{
using (var ctx = new OpsManageDbContext())
{
ctx.Set <TEntity>().Attach(entity);
foreach (Expression <Func <TEntity, Object> > expression in propertyExpression)
{
ctx.Entry(entity).Property(expression).IsModified = true;
}
return(await ctx.SaveChangesAsync() > 0);
}
}