toJSON

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public static string ToJSON(IEnumerable array, params string[] propertyNames)
{
Guard<ArgumentNullException>(array == null || propertyNames == null);
if (propertyNames.Length > 0)
{
IEnumerator tor = array.GetEnumerator();
if (tor.MoveNext())
{
StringBuilder json = new StringBuilder("[{");
object entity = tor.Current;
Type type = entity.GetType();
PropertyInfo property;
foreach (string name in propertyNames)
{
property = type.GetProperty(name, BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty);
if (property != null)
{
json.Append(property.Name).Append(':');
AppendJSONValue(json, property, GetPropertyAccess(property).GetValue(entity));
json.Append(',');
}
}
json.Length--;
json.Append('}');
while (tor.MoveNext())
{
entity = tor.Current;
type = entity.GetType();
json.Append(",{");
foreach (string name in propertyNames)
{
property = type.GetProperty(name, BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty);
if (property != null)
{
json.Append(property.Name).Append(':');
AppendJSONValue(json, property, GetPropertyAccess(property).GetValue(entity));
json.Append(',');
}
}
json.Length--;
json.Append('}');
}
return json.Append("]").ToString();
}
}
return "[]";
}

private static void AppendJSONValue(StringBuilder buffer, PropertyInfo property, object value)
{
switch (Type.GetTypeCode(property.PropertyType))
{
case TypeCode.Boolean:
buffer.Append(value.ToString().ToLower());
break;
case TypeCode.DateTime:
DateTime time = Convert.ToDateTime(value);
buffer.Append("new Date(")
.Append(time.Year).Append(',')
.Append(time.Month - 1).Append(',')
.Append(time.Day).Append(',')
.Append(time.Hour).Append(',')
.Append(time.Minute).Append(',')
.Append(time.Second).Append(')');
break;
case TypeCode.String:
buffer.Append('"').Append(value).Append('"');
break;
default:
buffer.Append(value);
break;
}
}

转载于:https://www.cnblogs.com/Googler/archive/2011/02/15/1955439.html