【C#】.net 导出Excel功能

将DataSet对象导出成Excel文档

一、不带格式控制

void btnExport_Click(object sender, EventArgs e)
        {
            IList<string> fields = new List<string>();
            IList<string> headers = new List<string>();
            fields.Add("数据库字段名1");
            headers.Add("Excel字段名1");
            fields.Add("数据库字段名2");
            headers.Add("Excel字段名2");

            StringBuilder strFlag = new StringBuilder();
            foreach (string head in headers)
            {
                strFlag.Append(head + ",");
                if (head == headers[headers.Count - 1])
                {
                    strFlag = strFlag.Remove(strFlag.Length - 1, 1);
                    strFlag.Append("\r\n");
                }
            }

            DataSet dt = new DataSet();//从数据库获取到数据
            if (dt != null && dt.Tables[0].Rows.Count > 0)
            {
                foreach (DataRow row in dt.Tables[0].Rows)
                {
                    foreach (string field in fields)
                    {
                        strFlag.Append(row[field]).Append(",");
                        if (field == fields[headers.Count - 1])
                        {
                            strFlag = strFlag.Remove(strFlag.Length - 1, 1);
                            strFlag.Append("\r\n");
                        }
                    }
                }

                Page.Response.Clear();
                Page.Response.Buffer = false;
                Page.Response.Charset = "GB2312";

                Page.Response.AppendHeader("Content-Disposition", "attachment;filename=Excel文件名.csv");
                Page.Response.ContentType = "application/octet-stream";

                Page.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
                Page.EnableViewState = false;
                Page.Response.Write(strFlag.ToString());
                Page.Response.End();
            }
        }

简洁版