使用此功能创建一个ExtensionMethods类
public static IQueryable<T> Like<T>(this IQueryable<T> source, string propertyName, string keyword)
{
var type = typeof(T);
var property = type.GetProperty(propertyName);
string number = "Int";
if (property.PropertyType.Name.StartsWith(number))
return source;
var parameter = Expression.Parameter(type, "p");
var propertyAccess = Expression.MakeMemberAccess(parameter, property);
var constant = Expression.Constant("%" + keyword + "%");
MethodCallExpression methodExp = Expression.Call(null, typeof(SqlMethods).GetMethod("Like", new Type[] { typeof(string), typeof(string) }), propertyAccess, constant);
Expression<Func<T, bool>> lambda = Expression.Lambda<Func<T, bool>>(methodExp, parameter);
return source.Where(lambda);
}
然后调用它像这样:
var result = db.table_a.Like("column_a", "%search%");
http://stackoverflow.com/a/2456070/1193727 – resnyanskiy 2012-02-17 04:40:01