c# - 您可以/应该在 c# switch 语句中抛出异常吗？

Question

我有一个返回 int 的插入查询。基于那个 int 我可能希望抛出一个异常。这适合在 switch 语句中执行吗？

 switch (result)
        {

            case D_USER_NOT_FOUND:
                throw new ClientException(string.Format("D User Name: {0} , was not found.", dTbx.Text));
            case C_USER_NOT_FOUND:
                throw new ClientException(string.Format("C User Name: {0} , was not found.", cTbx.Text));
            case D_USER_ALREADY_MAPPED:
                throw new ClientException(string.Format("D User Name: {0} , is already mapped.", dTbx.Text));
            case C_USER_ALREADY_MAPPED:
                throw new ClientException(string.Format("C User Name: {0} , is already mapped.", cTbx.Text));
            default:

                break;
        }

我通常会在开关中添加 break 语句，但它们不会被击中。这是一个糟糕的设计吗？请与我分享任何意见/建议。

谢谢，~ck 在圣地亚哥

Answer 1

为什么不呢？

来自 The C# Programming Language, Third Ed.，Anders Hejlsberg 等人，第 362 页:

The statement list of a switch section typically ends in a break, goto case, or goto default statement, but any construct that renders the end point of the statement list unreachable is permitted. [...] Likewise, a throw or return statement always transfers control elsewhere and never reaches its end point. Thus the following example is valid:

switch(i) {
case 0:
    while(true) F();
case 1:
    throw new ArgumentException();
case 2:
    return;
}