Question

我根据以下条件将一些字符串附加到我的字符串构建器对象：

StringBuilder Sb_Appearance = new StringBuilder();

if (Details.IsNeat == true) 
    Sb_Appearance.Append("Neat");

if (Details.IsDressed == true) 
    Sb_Appearance.Append(",Dressed");

if (Details.IsDisheveled == true) 
    Sb_Appearance.Append(",Disheveled");

if (Details.IsInappropriatelyDressed == true) 
    Sb_Appearance.Append(",Inappropriately Dressed");

if (Details.IsAppearanceOther == true) 
    Sb_Appearance.Append(",Other");

如果第一个和第四个条件出错，我的最终字符串可以变为::

,Dressed,Disheveled,Other

在这里我可以得到一个额外的逗号。我必须找到该逗号，如果它存在于第一个索引的Sb_Appearance中并且必须删除它。我怎么能这样做。

Answer 1

我建议使用List<string>并在之后加入：

var list = new List<string>();

if (Details.IsNeat)
    list.Add("Neat");

if (Details.IsDressed)
    list.Add("Dressed");

if (Details.IsDisheveled)
    list.Add("Disheveled");

if (Details.IsInappropriatelyDressed)
    list.Add("Inappropriately Dressed");

if (Details.IsAppearanceOther)
    list.Add("Other");

var result = string.Join(", ", list);

我知道那不是你问的（你想要StringBuilder）..但这就是你想要的。

Answer 2

这是一种方式：

StringBuilder Sb_Appearance = new StringBuilder();
if (Details.IsNeat) Sb_Appearance.Append(",Neat");
if (Details.IsDressed) Sb_Appearance.Append(",Dressed");
if (Details.IsDisheveled) Sb_Appearance.Append(",Disheveled");
if (Details.IsInappropriatelyDressed) Sb_Appearance.Append(",Inappropriately Dressed");
if (Details.IsAppearanceOther) Sb_Appearance.Append(",Other");

var NewString = Sb_Appearance.ToString().TrimStart(',');

Answer 3

您先添加逗号然后再添加值的原因是什么？如果可以，我会交换逗号。

StringBuilder Sb_Appearance = new StringBuilder();

if (Details.IsNeat == true) 
    Sb_Appearance.Append("Neat,");

if (Details.IsDressed == true) 
    Sb_Appearance.Append("Dressed,");

if (Details.IsDisheveled == true) 
    Sb_Appearance.Append("Disheveled,");

if (Details.IsInappropriatelyDressed == true) 
    Sb_Appearance.Append("Inappropriately Dressed,");

if (Details.IsAppearanceOther == true) 
    Sb_Appearance.Append("Other");

if(Sb_Appearance[Sb_Appearance.Length - 1] == ',')
    Sb_Appearance.Remove(Sb_Appearance.Length - 1, 1);

以正确的方式处理字符串构建器

3 个答案: