将CSV文件导出到Excel 2007

Question

I have some code for sending a data result to the user as CSV. This works fine with Excel 2013 but in Excel 2007, it won't split into columns, but rather as data inserted into only one column.

Is there a way of telling Excel how to split the text (it's separated by ; ) ? Here is my code:

    public async Task ExcelResultList(int id)
    {
        var asString = await Resolver.Resolve<IHandoutManager>().GetResultListAsStringAsync(id);
        var handout = await Resolver.Resolve<IHandoutManager>().GetHandout(id);

        var filename = string.Format("{0} registrations - {1:yyyy-MM-dd}.csv", handout.Name, DateTime.Now);
        var contenttype = "application/csv";
        Response.Clear();
        Response.ContentType = contenttype;
        Response.AddHeader("content-disposition", "attachment;filename=" + filename);            
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        Response.ContentEncoding = Encoding.Unicode; 
        Response.Write(asString);
        Response.End();
    }

Answer 1

To make sure that you are using the correct ListSeparator ("," or ";") use this

System.Globalization.CultureInfo.CurrentCulture.TextInfo.ListSeparator

But since you only have access to the server side, then you can include this javascript in any of your pages,

function getListSeparator() {
    var list = ['a', 'b'], str;
    if (list.toLocaleString) {
        str = list.toLocaleString();
        if (str.indexOf(';') > 0 && str.indexOf(',') == -1) {
            return ';';
        }
    }
    return ',';
}

The key is in the toLocaleString method that uses the system list separator of the client side

You could use JavaScript to get the list separator and set it in a cookie which you could then detect from your server to generate the file as needed

And also have you try changing the contenttype to

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

or

application/vnd.ms-excel