Question

我正在尝试从Internet Explorer写出一个Excel .xls文件。一种方法是工作，就是让asp：ImageButton的click事件完成工作。就是这样：

    protected void imgExport_Click(object sender, EventArgs e)
    {

        GridView gv = new GridView();
        gv.DataSource = list; // assume this has my data
        gv.DataBind();

        Response.Clear();
        Response.ContentType = "application/ms-excel";
        Response.AddHeader("content-disposition", "attachment;filename=RoamingPartners.xls");

        StringWriter swriter = new StringWriter();
        HtmlTextWriter hwriter = new HtmlTextWriter(swriter);

        gv.RenderControl(hwriter);

        Response.Write(swriter.ToString().Replace("&lt;br/&gt;", " "));
        swriter.Close();
        hwriter.Close();
        Response.End();
    }

如上所述，这可行，并写出我的文件。

但是，我不想使用asp服务器控件。相反，我将上面的内容转换为WebMethod并通过jQuery进行ajax调用。请注意这一点类似于上面的方法，除了我必须使用HttpContext.Current.Response而不是Response：

    [WebMethod]
    public static void ExportData()
    {

        GridView gv = new GridView();
        gv.DataSource = list; // assume this has my data (I use country param to get it)
        gv.DataBind(); 

        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.ContentType = "application/ms-excel";
        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=RoamingPartners.xls");

        StringWriter swriter = new StringWriter();
        HtmlTextWriter hwriter = new HtmlTextWriter(swriter);

        gv.RenderControl(hwriter);

        HttpContext.Current.Response.Write(swriter.ToString().Replace("&lt;br/&gt;", " "));
        swriter.Close();
        hwriter.Close();

        HttpContext.Current.Response.End();
    }

为了更好的衡量，我的ajax电话：

 $.ajax({
        type: "POST",
        url: "Default.aspx/ExportData",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (response) {
            alert("success");
        },
        failure: function (response) {
            alert("failure");
        }
    });

问题是这会引发“线程被中止”。例外。有人建议捕获异常，但我仍然没有得到我的文件。另一个建议是使用HttpContext.Current.ApplicationInstance.CompleteRequest（）而不是HttpContext.Current.Response.End（），但这也不会写出文件。我如何让它工作？

WebMethod通过Ajax异常：线程被中止

0 个答案: