c# - 将数据网格导出到 excel asp

Question

将 Datagrid 导出到 excel 的最佳方法是什么？我没有任何将数据网格导出到 excel 的经验，所以我想知道你们如何将数据网格导出到 excel。我读到有很多方法，但我想做一个简单的导出 excel 到数据网格函数。我正在使用 asp.net C#

干杯..

Answer 1

最简单的方法是简单地将 csv 或 html(特别是 <table><tr><td>...</td></tr>...</table>)写入输出，并通过内容类型 header 假装它是 excel 格式。 Excel 会很乐意加载其中之一； csv 更简单...

这是一个类似的示例(它实际上采用 IEnumerable，但它与任何来源(例如 DataTable，遍历行)都是相似的。

        public static void WriteCsv(string[] headers, IEnumerable<string[]> data, string filename)
        {
            if (data == null) throw new ArgumentNullException("data");
            if (string.IsNullOrEmpty(filename)) filename = "export.csv";

            HttpResponse resp = System.Web.HttpContext.Current.Response;
            resp.Clear();
            // remove this line if you don't want to prompt the user to save the file
            resp.AddHeader("Content-Disposition", "attachment;filename=" + filename);
            // if not saving, try: "application/ms-excel"
            resp.ContentType = "text/csv";
            string csv = GetCsv(headers, data);
            byte[] buffer = resp.ContentEncoding.GetBytes(csv);
            resp.AddHeader("Content-Length", buffer.Length.ToString());
            resp.BinaryWrite(buffer);
            resp.End();
        }
        static void WriteRow(string[] row, StringBuilder destination)
        {
            if (row == null) return;
            int fields = row.Length;
            for (int i = 0; i < fields; i++)
            {
                string field = row[i];
                if (i > 0)
                {
                    destination.Append(',');
                }
                if (string.IsNullOrEmpty(field)) continue; // empty field

                bool quote = false;
                if (field.Contains("\""))
                {
                    // if contains quotes, then needs quoting and escaping
                    quote = true;
                    field = field.Replace("\"", "\"\"");
                }
                else
                {
                    // commas, line-breaks, and leading-trailing space also require quoting
                    if (field.Contains(",") || field.Contains("\n") || field.Contains("\r")
                        || field.StartsWith(" ") || field.EndsWith(" "))
                    {
                        quote = true;
                    }
                }
                if (quote)
                {
                    destination.Append('\"');
                    destination.Append(field);
                    destination.Append('\"');
                }
                else
                {
                    destination.Append(field);
                }

            }
            destination.AppendLine();
        }
        static string GetCsv(string[] headers, IEnumerable<string[]> data)
        {
            StringBuilder sb = new StringBuilder();
            if (data == null) throw new ArgumentNullException("data");
            WriteRow(headers, sb);
            foreach (string[] row in data)
            {
                WriteRow(row, sb);

            }
            return sb.ToString();
        }