使用 C# 将对象属性分配给 SAP 中的字符串变量

Assign object attribute to a String variable in SAP using c#

假设我创建了一个名为 oItem 的对象。而且这个有很多属性比如ItemCode,ItemName.......(300左右)。我想为我的应用程序用户选择的其中一些属性分配新值。用户将这些属性名称作为字符串。

例如:string attribute1 = "ItemCode".

现在我要做的是为这个属性赋值,例如:

oItem.attribute1 = "01234";

有没有办法做这样的事情?我知道您可以将 c# 函数调用转换为字符串。因此我认为这也应该是可能的。任何帮助将不胜感激。谢谢!

更新:这是我的 SAP 插件的一部分。所以这些属性来自数据库 table。困难的部分是用户可以向其中添加更多列(用户定义的字段),这会增加属性的数量,而且我只知道原来的 300 个属性。

如果你有 300 个属性,你真的应该重构这个 class。我认为您可以在这种情况下使用 Dictionarystring, string>

Dictionary<string, string> Items = new Dictionary<string, string> 
{
    {"attribute1", "01234"}, {"attribute2", "56789"}, {"attribute3", "76543"}, // ...
};

您可以非常有效地访问这些值:

string attribute1 = Items["attribute1"];

或add/modify他们以类似的方式:

Items["attribute4"] = "23456";

为了方便您,C# 中有一个 "dynamic" 关键字。 来自 msdn dynamic object article 的示例:

// The class derived from DynamicObject.
public class DynamicDictionary : DynamicObject
{
    // The inner dictionary.
    Dictionary<string, object> dictionary
        = new Dictionary<string, object>();

    // This property returns the number of elements
    // in the inner dictionary.
    public int Count
    {
        get
        {
            return dictionary.Count;
        }
    }

    // If you try to get a value of a property 
    // not defined in the class, this method is called.
    public override bool TryGetMember(
        GetMemberBinder binder, out object result)
    {
        // Converting the property name to lowercase
        // so that property names become case-insensitive.
        string name = binder.Name.ToLower();

        // If the property name is found in a dictionary,
        // set the result parameter to the property value and return true.
        // Otherwise, return false.
        return dictionary.TryGetValue(name, out result);
    }

    // If you try to set a value of a property that is
    // not defined in the class, this method is called.
    public override bool TrySetMember(
        SetMemberBinder binder, object value)
    {
        // Converting the property name to lowercase
        // so that property names become case-insensitive.
        dictionary[binder.Name.ToLower()] = value;

        // You can always add a value to a dictionary,
        // so this method always returns true.
        return true;
    }
}

class Program
{
    static void Main(string[] args)
    {
        // Creating a dynamic dictionary.
        dynamic person = new DynamicDictionary();

        // Adding new dynamic properties. 
        // The TrySetMember method is called.
        person.FirstName = "Ellen";
        person.LastName = "Adams";

        // Getting values of the dynamic properties.
        // The TryGetMember method is called.
        // Note that property names are case-insensitive.
        Console.WriteLine(person.firstname + " " + person.lastname);

        // Getting the value of the Count property.
        // The TryGetMember is not called, 
        // because the property is defined in the class.
        Console.WriteLine(
            "Number of dynamic properties:" + person.Count);

        // The following statement throws an exception at run time.
        // There is no "address" property,
        // so the TryGetMember method returns false and this causes a
        // RuntimeBinderException.
        // Console.WriteLine(person.address);
    }
}

// This example has the following output:
// Ellen Adams
// Number of dynamic properties: 2

使用带有提供的库函数的 c# 为 SAP B1 插件执行此操作真的很容易。只需包含 using SAPbobsCOM;

然后可以按如下方式进行

yourobject.UserFields.Fields.Item("attribute").Value = "value";