JavaScriptSerializer中日期序列化问题解决方案
直接进入主题：
class Student
{
public int age { get; set; }
public DateTime? date { get; set; }
public string name { get; set; }
}
当点击的时候：
private void button1_Click(object sender, EventArgs e)
{
System.Web.Script.Serialization.JavaScriptSerializer js = new System.Web.Script.Serialization.JavaScriptSerializer();
List<Student> list = new List<Student>();
list.Add(new Student()
{
age = 10,
date = DateTime.Now,
name = "宋兴柱 是个好孩\"子,这里\"有英文逗号"
});
//js.RegisterConverters(new JavaScriptConverter[] { new DateTimeConverter() });
var str = js.Serialize(list);
//str = Regex.Replace(str, @"\\/Date\((\d+)\)\\/", match =>
//{
// DateTime dt = new DateTime(1970, 1, 1);
// dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));
// dt = dt.ToLocalTime();
// return dt.ToString("yyyy-MM-dd HH:mm:ss");
//});
//var obj = js.Deserialize<List<Student>>(str);
textBox1.Text = str;
}
这个时候，显示如下内容：[{"age":10,"date":"\/Date(1404098342309)\/","name":"宋兴柱 是个好孩\"子,这里\"有英文逗号"}]
显然，这里的DateTime 类型被替换成了：\/Date(1404098342309)\/，经过分析，其实这个1404098342309数值，是1970年1月1日（DateTime的最小值）到date实际表示的日期之差的总毫秒数。
因此，这里提供2种解决方案。
方案1 ：
private void button1_Click(object sender, EventArgs e)
{
System.Web.Script.Serialization.JavaScriptSerializer js = new System.Web.Script.Serialization.JavaScriptSerializer();
List<Student> list = new List<Student>();
list.Add(new Student()
{
age = 10,
date = DateTime.Now,
name = "宋兴柱 是个好孩\"子,这里\"有英文逗号"
});
//js.RegisterConverters(new JavaScriptConverter[] { new DateTimeConverter() });
var str = js.Serialize(list);
str = Regex.Replace(str, @"\\/Date\((\d+)\)\\/", match =>
{
DateTime dt = new DateTime(1970, 1, 1);
dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));
dt = dt.ToLocalTime();
return dt.ToString("yyyy-MM-dd HH:mm:ss");
});
//var obj = js.Deserialize<List<Student>>(str);
textBox1.Text = str;
}
显示结果：[{"age":10,"date":"2014-06-30 11:22:15","name":"宋兴柱 是个好孩\"子,这里\"有英文逗号"}]
当取消var obj = js.Deserialize<List<Student>>(str);的注释之后，会发现反序列化也完全正常。因此，这算是当前的最佳方案。
方案2 ：
如果用户的日期需求中，只用到年月日，无需时分秒的情况下：如，2014-06-30 时，可以使用如下方案：
public class DateTimeConverter : JavaScriptConverter
{
public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer)
{
return new JavaScriptSerializer().ConvertToType(dictionary, type);
}
public override IDictionary<string, object> Serialize(object obj, JavaScriptSerializer serializer)
{
if (!(obj is DateTime)) return null;
return new CustomString(((DateTime)obj).ToString("yyyy-MM-dd"));
}
public override IEnumerable<Type> SupportedTypes
{
get
{
return new[] { typeof(DateTime) };
}
}
private class CustomString : Uri, IDictionary<string, object>
{
public CustomString(string str)
: base(str, UriKind.Relative)
{
}
void IDictionary<string, object>.Add(string key, object value)
{
throw new NotImplementedException();
}
bool IDictionary<string, object>.ContainsKey(string key)
{
throw new NotImplementedException();
}
ICollection<string> IDictionary<string, object>.Keys
{
get
{
throw new NotImplementedException();
}
}
bool IDictionary<string, object>.Remove(string key)
{
throw new NotImplementedException();
}
bool IDictionary<string, object>.TryGetValue(string key, out object value)
{
throw new NotImplementedException();
}
ICollection<object> IDictionary<string, object>.Values
{
get
{
throw new NotImplementedException();
}
}
object IDictionary<string, object>.this[string key]
{
get
{
throw new NotImplementedException();
}
set
{
throw new NotImplementedException();
}
}
void ICollection<KeyValuePair<string, object>>.Add(KeyValuePair<string, object> item)
{
throw new NotImplementedException();
}
void ICollection<KeyValuePair<string, object>>.Clear()
{
throw new NotImplementedException();
}
bool ICollection<KeyValuePair<string, object>>.Contains(KeyValuePair<string, object> item)
{
throw new NotImplementedException();
}
void ICollection<KeyValuePair<string, object>>.CopyTo(KeyValuePair<string, object>[] array, int arrayIndex)
{
throw new NotImplementedException();
}
int ICollection<KeyValuePair<string, object>>.Count
{
get
{
throw new NotImplementedException();
}
}
bool ICollection<KeyValuePair<string, object>>.IsReadOnly
{
get
{
throw new NotImplementedException();
}
}
bool ICollection<KeyValuePair<string, object>>.Remove(KeyValuePair<string, object> item)
{
throw new NotImplementedException();
}
IEnumerator<KeyValuePair<string, object>> IEnumerable<KeyValuePair<string, object>>.GetEnumerator()
{
throw new NotImplementedException();
}
IEnumerator IEnumerable.GetEnumerator()
{
throw new NotImplementedException();
}
}
点击按钮时，注册即可：
private void button1_Click(object sender, EventArgs e)
{
System.Web.Script.Serialization.JavaScriptSerializer js = new System.Web.Script.Serialization.JavaScriptSerializer();
List<Student> list = new List<Student>();
list.Add(new Student()
{
age = 10,
date = DateTime.Now,
name = "宋兴柱 是个好孩\"子,这里\"有英文逗号"
});
js.RegisterConverters(new JavaScriptConverter[] { new DateTimeConverter() });
var str = js.Serialize(list);
//str = Regex.Replace(str, @"\\/Date\((\d+)\)\\/", match =>
//{
// DateTime dt = new DateTime(1970, 1, 1);
// dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));
// dt = dt.ToLocalTime();
// return dt.ToString("yyyy-MM-dd HH:mm:ss");
//});
//var obj = js.Deserialize<List<Student>>(str);
textBox1.Text = str;
}
执行效果如下：[{"age":10,"date":"2014-06-30","name":"宋兴柱 是个好孩\"子,这里\"有英文逗号"}]
对于方案二来说，由于内部使用的是Uri类，因此，将日期转为字符串如：2014-06-30 11:30:00这 种样式的时候，中间的空格，会被进行Url编码：空格会被编码成：%20。因此会损坏原有的日期格式。不过方案二对于其它类型的使用，依然有借鉴之处。还忘不断探索。
------------------- 繁星小宋：宋兴柱(Sindrol)于2014-06-30：11：31分
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发表于 2021-4-15 17:43:45