vb.net - vb.net - 将字符串传递给函数并替换该字符串中的几个单词

Question

请帮忙，我需要将字符串传递给函数，其中包含几个需要在字符串中替换的可选参数。有人可以帮助如何做到这一点，因为我不是 vb.net

String - "The <field1> is mandatory"
Variable - Employee Id
Output should be - "The Employee Id is mandatory"

问候

Answer 1

您将查看String.Replace 方法。像这样的东西。由于字符串是不可变的，因此它会返回一个带有更正值的新字符串，然后您需要将其分配给旧字符串。

Module Module1

    Sub Main()
        Dim test As String = "The <field1> is mandatory"
        Dim variable As String = "Employee Id"
        test = test.Replace("<field1>", variable)
        Console.WriteLine(test)
        Console.ReadLine()
    End Sub

End Module

您还可以使用使用复合格式的String.Format方法，该方法允许您在字符串中嵌入字段，然后用变量替换它们。像这样的东西。

Dim test As String = "The {0} is a mandatory {1}"
Dim variable As String = "Employee Id"
Dim variable2 As String = "Field"

test = String.Format(test, variable, variable2)

Answer 2

你可以用这个

Public Function cal(Byref id)
Dim str as String
str= "The "+id+" is mandatory"
return str
End Function

并通过调用此函数

s=cal(id) //id is the value to be passed and s is the result