/// <summary>
/// 非空字符串和空格字符串
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="build"></param>
/// <param name="str"></param>
/// <param name="rigthExpression"></param>
/// <returns></returns>
public static PredicateBuilder <T> AndIfNotEmpty <T>(this PredicateBuilder <T> build, string str, Expression <Func <T, bool> > rigthExpression) where T : class
{
if (!string.IsNullOrWhiteSpace(str))
{
build.expression = PredicateExtensions.And(build.Expression, rigthExpression);
}
return(build);
}
public static PredicateBuilder <T> AndIf <T>(this PredicateBuilder <T> build, bool condition, Expression <Func <T, bool> > rigthExpression) where T : class
{
if (condition)
{
build.expression = PredicateExtensions.And(build.Expression, rigthExpression);
}
return(build);
}
/// <summary>
/// 非空对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="build"></param>
/// <param name="obj"></param>
/// <param name="rigthExpression"></param>
/// <returns></returns>
public static PredicateBuilder <T> AndIfNotNull <T>(this PredicateBuilder <T> build, object obj, Expression <Func <T, bool> > rigthExpression) where T : class
{
if (obj != null)
{
build.expression = PredicateExtensions.And(build.Expression, rigthExpression);
}
return(build);
}
/// <summary>
/// 非空集合 not null and .Any()
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="build"></param>
/// <param name="src"></param>
/// <param name="rigthExpression"></param>
/// <returns></returns>
public static PredicateBuilder <T> AndIfNotEmpty <T>(this PredicateBuilder <T> build, IEnumerable src, Expression <Func <T, bool> > rigthExpression) where T : class
{
if (src != null && src.GetEnumerator().MoveNext())
{
build.expression = PredicateExtensions.And(build.Expression, rigthExpression);
}
return(build);
}
public PredicateBuilder <T> And(Expression <Func <T, bool> > rigthExpression)
{
this.expression = PredicateExtensions.And(this.expression, rigthExpression);
return(this);
}