C# 利用反射动态将字符串转换成属性对应的类型值

最新推荐文章于 2024-02-03 00:15:00 发布

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最新推荐文章于 2024-02-03 00:15:00 发布

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///
/// 为指定对象分配参数
///
/// 对象类型
/// 字段/值
///
public static T Assign(Dictionary<string, string> dic) where T : new()
{
Type myType = typeof(T);
T entity = new T();
var fields = myType.GetProperties();
string val = string.Empty;
object obj = null;

        foreach (var field in fields)
        {
            if (!dic.Keys.Contains(field.Name))
                continue;
            val = dic[field.Name];

            object defaultVal;
            if (field.PropertyType.Name.Equals("String"))
                defaultVal = "";
            else if (field.PropertyType.Name.Equals("Boolean"))
            {
                defaultVal = false;
                val = (val.Equals("1") || val.Equals("on")).ToString();
            }
            else if (field.PropertyType.Name.Equals("Decimal"))
                defaultVal = 0M;
            else
                defaultVal = 0;

            if (!field.PropertyType.IsGenericType)
                obj = string.IsNullOrEmpty(val) ? defaultVal : Convert.ChangeType(val, field.PropertyType);
            else
            {
                Type genericTypeDefinition = field.PropertyType.GetGenericTypeDefinition();
                if (genericTypeDefinition == typeof(Nullable<>))
                    obj = string.IsNullOrEmpty(val) ? defaultVal : Convert.ChangeType(val, Nullable.GetUnderlyingType(field.PropertyType));
            }

            field.SetValue(entity, obj, null);
        }

        return entity;
    }