对象转储程序类
我正在寻找一个可以输出对象及其所有叶值的类,其格式类似于:
User
- Name: Gordon
- Age : 60
- WorkAddress
- Street: 10 Downing Street
- Town: London
- Country: UK
- HomeAddresses[0]
...
- HomeAddresses[1]
...
(或更清晰的格式).这相当于:
public class User
{
public string Name { get;set; }
public int Age { get;set; }
public Address WorkAddress { get;set; }
public List<Address> HomeAddresses { get;set; }
}
public class Address
{
public string Street { get;set; }
public string Town { get;set; }
public string Country { get;set; }
}
一种PropertyGrid控件的字符串表示形式,减去必须为每种类型实现大量设计器.
PHP有一些叫做var_dump的东西.我不想使用手表,因为这是用于打印出来的.
如果它存在,有人能指出这样的事吗？或者,写一个赏金.
Chr*_*s S 51
在sgmoore的链接中发布的对象转储器:
//Copyright (C) Microsoft Corporation. All rights reserved.
using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
// See the ReadMe.html for additional information
public class ObjectDumper {
public static void Write(object element)
{
Write(element, 0);
}
public static void Write(object element, int depth)
{
Write(element, depth, Console.Out);
}
public static void Write(object element, int depth, TextWriter log)
{
ObjectDumper dumper = new ObjectDumper(depth);
dumper.writer = log;
dumper.WriteObject(null, element);
}
TextWriter writer;
int pos;
int level;
int depth;
private ObjectDumper(int depth)
{
this.depth = depth;
}
private void Write(string s)
{
if (s != null) {
writer.Write(s);
pos += s.Length;
}
}
private void WriteIndent()
{
for (int i = 0; i < level; i++) writer.Write(" ");
}
private void WriteLine()
{
writer.WriteLine();
pos = 0;
}
private void WriteTab()
{
Write(" ");
while (pos % 8 != 0) Write(" ");
}
private void WriteObject(string prefix, object element)
{
if (element == null || element is ValueType || element is string) {
WriteIndent();
Write(prefix);
WriteValue(element);
WriteLine();
}
else {
IEnumerable enumerableElement = element as IEnumerable;
if (enumerableElement != null) {
foreach (object item in enumerableElement) {
if (item is IEnumerable && !(item is string)) {
WriteIndent();
Write(prefix);
Write("...");
WriteLine();
if (level < depth) {
level++;
WriteObject(prefix, item);
level--;
}
}
else {
WriteObject(prefix, item);
}
}
}
else {
MemberInfo[] members = element.GetType().GetMembers(BindingFlags.Public | BindingFlags.Instance);
WriteIndent();
Write(prefix);
bool propWritten = false;
foreach (MemberInfo m in members) {
FieldInfo f = m as FieldInfo;
PropertyInfo p = m as PropertyInfo;
if (f != null || p != null) {
if (propWritten) {
WriteTab();
}
else {
propWritten = true;
}
Write(m.Name);
Write("=");
Type t = f != null ? f.FieldType : p.PropertyType;
if (t.IsValueType || t == typeof(string)) {
WriteValue(f != null ? f.GetValue(element) : p.GetValue(element, null));
}
else {
if (typeof(IEnumerable).IsAssignableFrom(t)) {
Write("...");
}
else {
Write("{ }");
}
}
}
}
if (propWritten) WriteLine();
if (level < depth) {
foreach (MemberInfo m in members) {
FieldInfo f = m as FieldInfo;
PropertyInfo p = m as PropertyInfo;
if (f != null || p != null) {
Type t = f != null ? f.FieldType : p.PropertyType;
if (!(t.IsValueType || t == typeof(string))) {
object value = f != null ? f.GetValue(element) : p.GetValue(element, null);
if (value != null) {
level++;
WriteObject(m.Name + ": ", value);
level--;
}
}
}
}
}
}
}
}
private void WriteValue(object o)
{
if (o == null) {
Write("null");
}
else if (o is DateTime) {
Write(((DateTime)o).ToShortDateString());
}
else if (o is ValueType || o is string) {
Write(o.ToString());
}
else if (o is IEnumerable) {
Write("...");
}
else {
Write("{ }");
}
}
}
2015年更新
YAML也很好地实现了这个目的,这就是YamlDotNet可以做到的
install-package YamlDotNet
private static void DumpAsYaml(object o)
{
var stringBuilder = new StringBuilder();
var serializer = new Serializer();
serializer.Serialize(new IndentedTextWriter(new StringWriter(stringBuilder)), o);
Console.WriteLine(stringBuilder);
}
- `ObjectDumper`不显示数组的内容. (4认同)
- 如果有一种方法可以将其反序列化为一个对象,那将是非常棒的.:) (3认同)
Vde*_*dex 31
您可以使用JSON序列化程序,对于使用JSON的任何人来说都应该易于阅读
User theUser = new User();
theUser.Name = "Joe";
System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(myPerson.GetType());
MemoryStream ms = new MemoryStream();
serializer.WriteObject(ms, theUser );
string json = Encoding.Default.GetString(ms.ToArray());
- 另外一个很好的选择应该是使用Newtonsoft Json库,我们很多人都已经知道这些库并且它非常容易使用.`JsonConvert.SerializeObject(items,Formatting.Indented)`用于格式化输出.关于nuget:http://www.nuget.org/packages/Newtonsoft.Json (5认同)
- 我的代码可以使JSON输出更容易阅读(使用换行符)http://stackoverflow.com/questions/5881204/how-to-set-formatting-with-javascriptserializer-when-json-serializing (3认同)
Dan*_*ugg 13
如果您正在使用标记,System.Web.ObjectInfo.Print(ASP.NET Web Pages 2)将完成此任务,格式良好的HTML格式.
例如:
@ObjectInfo.Print(new {
Foo = "Hello",
Bar = "World",
Qux = new {
Number = 42,
},
})
在网页中,生成:
Oma*_*abd 12
这是我为此写的视觉工作室扩展:
https://visualstudiogallery.msdn.microsoft.com/c6a21c68-f815-4895-999f-cd0885d8774f
在行动:
- 这是一个很好的扩展谢谢. (4认同)
- 如果C#对象生成的东西是一个单独的dll/nuget-package会很酷,所以我们可以在LinqPad中使用它来进行动态的对象到代码转储.经过近十年的.net开发,我仍然想念perl`Data :: Dumper`. (3认同)
我知道这是一个老问题,但我想我会抛弃一个对我有用的替代方案,花了我两分钟左右的时间.
安装Newtonsoft Json.NET: http://james.newtonking.com/json
(或nuget版本)http://www.nuget.org/packages/newtonsoft.json/
参考大会:
using Newtonsoft.Json;
转储JSON字符串到日志:
txtResult.Text = JsonConvert.SerializeObject(testObj);
你可以通过一点反思很容易地写出来.有点像:
public void Print(object value, int depth)
{
foreach(var property in value.GetType().GetProperties())
{
var subValue = property.GetValue(value);
if(subValue is IEnumerable)
{
PrintArray(property, (IEnumerable)subValue);
}
else
{
PrintProperty(property, subValue);
}
}
}
您可以编写PrintArray和PrintProperty方法.
- 我最近看到的是ObjectDumper.请参阅此问题http://stackoverflow.com/questions/360277/what-is-the-best-way-to-dump-entire-objects-to-a-log-in-c (6认同)
我有一个方便的T.Dump()扩展方法,应该非常接近你正在寻找的结果.作为一种扩展方法,它的非侵入性应该适用于所有POCO对象.
示例用法
var model = new TestModel();
Console.WriteLine(model.Dump());
示例输出
{
Int: 1,
String: One,
DateTime: 2010-04-11,
Guid: c050437f6fcd46be9b2d0806a0860b3e,
EmptyIntList: [],
IntList:
[
1,
2,
3
],
StringList:
[
one,
two,
three
],
StringIntMap:
{
a: 1,
b: 2,
c: 3
}
}