把新建的对象所有属性变成默认值

日常编码的过程中，我们经常能碰到一些小操作，有时候就是想节(tōu)约(gè)时(lǎn)间(er)，所以写好工具方法方便直接调用
 1     public static class WipeNullHelper
 2     {
 3         /// <summary>
 4         /// 把对象里的null变成相应类型的默认值
 5         /// </summary>
 6         /// <param name="entity">对象实体</param>
 7         /// <returns></returns>
 8         public static T WipeNull<T>(T entity)
 9         {
10             System.Reflection.PropertyInfo[] ps = entity.GetType().GetProperties();
11             Type type = entity.GetType();
12             foreach (PropertyInfo propertie in ps)
13             {
14                 if (propertie.PropertyType == typeof(string))
15                 {
16                     PropertyInfo propertyInfo = type.GetProperty(propertie.Name);
17                     if (propertyInfo.GetValue(entity, null) == null)
18                     {
19                         propertyInfo.SetValue(entity, "", null);
20                     }
21                 }
22                 else if (propertie.PropertyType == typeof(Int32))
23                 {
24                     PropertyInfo propertyInfo = type.GetProperty(propertie.Name);
25                     if (propertyInfo.GetValue(entity, null) == null)
26                     {
27                         propertyInfo.SetValue(entity, 0, null);
28                     }
29                 }
30                 else if (propertie.PropertyType == typeof(Nullable<int>))
31                 {
32                     PropertyInfo propertyInfo = type.GetProperty(propertie.Name);
33                     if (propertyInfo.GetValue(entity, null) == null)
34                     {
35                         propertyInfo.SetValue(entity, 0, null);
36                     }
37                 }
38                 else if (propertie.PropertyType == typeof(decimal))
39                 {
40                     PropertyInfo propertyInfo = type.GetProperty(propertie.Name);
41                     if (propertyInfo.GetValue(entity, null) == null)
42                     {
43                         propertyInfo.SetValue(entity, Convert.ToDecimal(0.0), null);
44                     }
45                 }
46                 else if (propertie.PropertyType == typeof(Nullable<decimal>))
47                 {
48                     PropertyInfo propertyInfo = type.GetProperty(propertie.Name);
49                     if (propertyInfo.GetValue(entity, null) == null)
50                     {
51                         propertyInfo.SetValue(entity, Convert.ToDecimal(0.0), null);
52                     }
53                 }
54             }
55             return entity;
56         }
57 
58     }