Question

任何人都可以解释当我抛出HttpException时会出现什么原因，当它冒出来时，无法从Exception中获取。给了一个更多的上下文，我有一个通用的剃刀视图与try..catch的异常，调用子视图，并在子视图中我抛出HttpException。问题是在通用视图中，Exception无法在引发时被转换为HttpException。这只发生在一个测试环境中，在我的本地机器中这是有效的（如预期的那样）。

代码：

儿童观点：

...
 }
    else
    {
        throw new HttpException(400,"Not Found");

    }

通用视图

try
{
    @Html.CachedPartial(moduleItem.DocumentTypeAlias, moduleItem, 60 * 60 * 24 * 365,
                                                                           contextualKeyBuilder: (model, viewData) => { return string.Format("{0}|{1}", moduleItem.Id, Request.QueryString); },
                                                                           viewData: ViewData)
}
catch (Exception ex)
{
    //the ex.GetType() is Exception when HttpException is raised 
    if (ex != null && ex.GetType()== typeof(HttpException))
    {
        var httpExp = ex as HttpException;
        var code = httpExp.GetHttpCode();
        if (code == 400)
        {
            HttpContext.Current.Response.StatusCode = (int)HttpStatusCode.NotFound;
            var xpathQuery = String.Format("//error404");
            var umbracoHelper = new UmbracoHelper(UmbracoContext.Current);
            var contentService = umbracoHelper.TypedContentAtXPath(xpathQuery);
            var culture = System.Threading.Thread.CurrentThread.CurrentUICulture.TwoLetterISOLanguageName;
            var moduleItem404 = contentService.FirstOrDefault(x=> x.GetCulture().TwoLetterISOLanguageName== culture);
            @Html.CachedPartial(moduleItem404.DocumentTypeAlias, moduleItem404, 60 * 60 * 24 * 365,
                                                                           contextualKeyBuilder: (model, viewData) => { return string.Format("{0}|{1}", moduleItem404.Id, Request.QueryString); },
                                           viewData: ViewData)
}
else
{
    throw ex;
}
}
else
{
    throw ex;
}

任何想法，提前谢谢。

Answer 1

您可以使用此代码来捕获不同类型的异常

try {
// code
}
catch (HttpException ex){
// code
}
catch (Exception ex){
// code
}

异常不能转换为HttpException

1 个答案: