vb.net – 验证对象是否具有某个属性

发布时间：2020-12-17 00:08:46 所属栏目：大数据来源：网络整理

导读：我找到了它的C#代码 here 所以我试过了 Public Function checkProperty(ByVal objectt As Object,ByVal propertyy As String) As Boolean Dim type As Type = objectt.GetType Return type.GetMethod(propertyy)End Function 但它在type.GetMethod(propertyy

我找到了它的C#代码 here

所以我试过了

Public Function checkProperty(ByVal objectt As Object,ByVal propertyy As String) As Boolean
    Dim type As Type = objectt.GetType
    Return type.GetMethod(propertyy)
End Function

但它在type.GetMethod(propertyy)上抛出一个错误,说“类型’System.Reflection.MethodInfo’的值不能转换为’Boolean’.”

该怎么办？

首先,C#代码检查方法的存在,而不是属性.其次,C#代码将return与null进行比较：

Public Function checkProperty(ByVal objectt As Object,ByVal propertyy As String) As Boolean
    Dim type As Type = objectt.GetType
    Return type.GetProperty(propertyy) IsNot Nothing
End Function

编辑要检查字段,请按如下所示更改方法：

Public Function checkField(ByVal objectt As Object,ByVal fieldName As String) As Boolean
    Dim type As Type = objectt.GetType
    Return type.GetField(fieldName) IsNot Nothing
End Function

（编辑：李大同）

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