STRING：如何從此輸入字符串獲取字符串輸出？

Question

您如何從以下輸入中獲取消息

輸入的格式為字段名，以逗號分隔，后跟冒號，空格，然后顯示錯誤消息。

<FieldName1>, <FieldName2>, <FieldName3>: <ErrorMessage>"     

輸入范例

"ConsumerSecret, ConsumerKey: Invalid application credentials" 
"Password: Invalid Must contain at least one alpha, one numeric, and one special character"

方法

string Message GetErrorByField (string FieldName, string InputString);

1

ErrorMessage = GetErrorByField("ConsumerSecret", "ConsumerSecret, ConsumerKey: Invalid application credentials");

現在，ErrorMessage應該等於

"Invalid application credentials".

2

ErrorMessage = GetErrorByField("ConsumerKey", "ConsumerSecret, ConsumerKey: Invalid application credentials");

現在，ErrorMessage應該等於

"Invalid application credentials".

3

ErrorMessage = GetErrorByField("Password", "Password: Invalid Must contain at least one alpha, one numeric, and one special character");

現在，ErrorMessage應該等於

"Invalid Must contain at least one alpha, one numeric, and one special character".

Answer 1

通過以下方法拆分InputString即GetErrorByField()方法中的第二個參數:然后，您將通過考慮索引為1的拆分字符串來獲得結果

string Message = InputString.Split(':')[1].Trim();

Answer 2

您可以簡單地使用字符串類的Split方法，並獲取適當的值：

GetErrorByField(string str)
{
   var splited = str.Split(":".ToCharArray());
   if (splited != null && splited.Length == 2)
      return splited[1].TrimStart().TrimEnd();
   return string.Empty;
}