MVC model验证 获取验证错误信息

public static class ModelStateExtensions ???{ ???????/// <summary> ???????/// 获取model验证错误信息 ???????/// </summary> ???????/// <param name="controller"></param> ???????/// <returns></returns> ???????public static string ExpendErrors(this System.Web.Mvc.Controller controller) ???????{ ???????????StringBuilder strBuild = new StringBuilder(); ???????????foreach (var item in controller.ModelState.Values) ???????????{ ???????????????if (item.Errors.Count > 0) ???????????????{ ???????????????????int itemErrorCount = item.Errors.Count; ???????????????????for (int i = 0; i < itemErrorCount; i++) ???????????????????{ ???????????????????????strBuild.Append(item.Errors[i].ErrorMessage); ???????????????????????strBuild.Append("<br/>"); ???????????????????} ???????????????} ???????????} ???????????return strBuild.ToString(); ???????} ???}