选择一个3gb的文件，提交动作触发器，超过3gb的提交动作不再工作

真的很困惑，为什么这个不工作…

我有一个输入和一个按钮，我用它来获取文件路径，以便稍后处理一些工作。我遇到的问题是，如果我选择一个~3gb的文件，我的提交操作就像预期的那样工作。如果我选择一个~4gb或~5gb的文件，我的提交动作就不再起作用了。没有东西会返回到服务器。我不做上传。我只是使用选定的文件路径。知道是怎么回事吗?这是使用IE。

更新:这在Chrome中工作，但因为我不能得到正确的路径我的功能失败。

文件选择代码:

 public CmtMediaUiGenerator<TModel> video(
            Expression<Func<TModel, MediaFileViewModel>> fileExpression,
            Expression<Func<TModel, bool>> widescreenExpression,
            Expression<Func<TModel, int?>> formatExpression,
            Expression<Func<TModel, bool>> encryptedExpression = null,
            bool stacked = false,
            object htmlAttributes = null)
        {
            string id = Guid.NewGuid().ToString("n");
            MvcHtmlString label = HtmlHelper.LabelFor(fileExpression, htmlAttributes: new { @class = "label" });
            //MvcHtmlString id = HtmlHelper.IdFor(expression);
            StringBuilder validationMessages = new StringBuilder();
            validationMessages.Append(HtmlHelper.ValidationMessageFor(fileExpression).ToHtmlString());
            validationMessages.Append(HtmlHelper.ValidationMessageFor(widescreenExpression).ToHtmlString());
            validationMessages.Append(HtmlHelper.ValidationMessageFor(formatExpression).ToHtmlString());
            StringBuilder html = new StringBuilder();
            html.AppendFormat("<div class='"video-container'" id='"{0}'">", id);
            html.Append("<div class='"video-file-container'">");
            string fileId = HtmlHelper.IdFor(fileExpression).ToHtmlString();
            MediaFileViewModel fileValue = fileExpression.Compile().Invoke(Model);
            html.AppendFormat("<input type='"hidden'" id='"{0}.FilePath'" name='"{0}.FilePath'" value='"{2}'" />"
                + "<input type='"hidden'" id='"{0}.MediaFileId'" name='"{0}.MediaFileId'" value='"{3}'" />"
                + "<button id='"{0}-button'" class='"button button-small'">Select File</button>"
                + "<span id='"{0}-value'" class='"display-value file-name-display'">{1}</span>",
                fileId,
                (fileValue == null ? null : Path.GetFileName(fileValue.FilePath)),
                (fileValue == null ? null : fileValue.FilePath),
                (fileValue == null ? 0 : fileValue.MediaFileId));
            html.Append("</div>");
            html.Append("<div>");
            string widescreenId = HtmlHelper.IdFor(widescreenExpression).ToHtmlString();
            bool widescreenValue = widescreenExpression.Compile().Invoke(Model);
            html.AppendFormat("<div class='"checkbox-value'">"
                + "<input type='"checkbox'" id='"{0}'" name='"{0}'" value='"true'" disabled {1} />"
                + "<label for='"{0}'">Widescreen</label>"
                + "</div>",
                widescreenId, (widescreenValue ? "checked" : ""));
            string formatId = HtmlHelper.IdFor(formatExpression).ToHtmlString();
            int? formatValue = formatExpression.Compile().Invoke(Model);
            html.AppendFormat("<input type='"hidden'" id='"{0}'" name='"{0}'" value='"{1}'" />"
                + "<div class='"label'">Format:</div><span id='"{0}-value'" class='"format-value'">{2}</span>",
                formatId, formatValue,
                (formatValue == null ? "n/a" : string.Format("MPEG {0}", formatValue)));
            string encryptedId = (encryptedExpression == null ? null
                : HtmlHelper.IdFor(encryptedExpression).ToHtmlString());
            if (encryptedExpression != null)
            {
                bool encryptedValue = encryptedExpression.Compile().Invoke(Model);
                html.AppendFormat("<div class='"checkbox-value'">"
                + "<input type='"checkbox'" id='"{0}'" name='"{0}'" value='"true'" disabled {1} />"
                    + "<label for='"{0}'">Encrypted</label>"
                    + "</div>",
                    encryptedId, (encryptedValue ? "checked" : ""));
                validationMessages.Append(HtmlHelper.ValidationMessageFor(encryptedExpression).ToHtmlString());
            }
            html.Append("</div>");
            html.AppendFormat("<script>$(function() {{ setUpVideoUpload('{0}', '{1}', '{2}', '{3}', {4}); }});</script>",
                id,
                fileId,
                widescreenId,
                formatId,
                (encryptedId == null ? "null" : "'" + encryptedId + "'"));
            html.Append("</div>");
            GenerateEditItemSet(id, label.ToHtmlString(), html.ToString(), validationMessages.ToString(),
                stacked: stacked,
                valueCssClass: "file-value");
            return (this);
            //new string[] { "1", "2", "4" }
        }

public CmtMediaUiGenerator<TModel> saveCancelButtons()
        {
            Output.Append("<hr />"
                + "<p>"
                    + "<a href='"/Media/'" class='"button'">Cancel</a>"
                    + "<input type='"submit'" name='"PostAction'" value='"Save'" class='"button button-primary'" />"
                    + "<input type='"submit'" name='"PostAction'" value='"Save & Close'" class='"button button-primary'" />"
                + "</p>");
            return (this);
        }

提前感谢!