low key 低调
I've been back and forth.我犹豫不定。
squeezed juice 鲜榨的果汁
juice with pulp 带果肉的果汁
side effect 副作用
he can't come to the phone now.他现在不能接电话
herbal tea 花草茶
ready for a refill?我再给你倒一杯吧？
I love what u have done with this place.我喜欢这里的布置。
what was tonight?今晚本来要做什么？
I have a table of Database, one item string "a" of this table can be set as null. Now I want to insert a row to this database, and use 'null' to assign variable "a". the codes can be :
string a=null;
.......
new SqlParameter("@a", a),
.......
Unluckly, I got an error: "expects parameter '@a' , which was not supplied
the reason of it is because the difference of C# datatype and SQLserver datatype
we must use the null formate of SQLserver and not C#, so the code should be:
new SqlParameter("@a", ObjString(a))
which ObjString function is:
private object ObjString(string param)
{
return param == null ? (object)DBNull.Value : (object)param;
}
