输出成CSV报表

做OA的时候，客户需要把结果输出成CSV文件!CSV文件是可以用Excel打开，其可以换行的字号是回车，在C#中是 \n

下面是代码把一个Table转换成字符串，一个CSV可以解析的字符串！

CSVConvert.aspx后台代码

    protected void Page_Load(object sender, EventArgs e)
    {
        DataTable dt = (DataTable)Session["Source"];
        ConvertCSV(dt, "a");
        //Response.Redirect();
    }
    /// <summary>
    /// 导出cvs文件
    /// </summary>
    /// <param name="dt"></param>
    /// <param name="reportFileName"></param>
    private void ConvertCSV(DataTable dt, string reportFileName)
    {
        StringBuilder sBuilder = new StringBuilder("");
        //string strCSV = string.Empty;
        for (int i = 0; i < dt.Columns.Count; i++)
        {
            if (i == 0)
            {
                sBuilder = sBuilder.Append("\"").Append(dt.Columns[i].ColumnName).Append("\"");
                //strCSV += "\"" + dt.Columns[i].ColumnName + "\"";
            }
            else
            {
                sBuilder = sBuilder.Append(",\"").Append(dt.Columns[i].ColumnName).Append("\"");
                //strCSV += ",\"" + dt.Columns[i].ColumnName + "\"";
            }
        }
        sBuilder = sBuilder.Append("\r\n");
        //strCSV += "\r\n";

        for (int i = 0; i < dt.Rows.Count; i++)
        {
            for (int j = 0; j < dt.Columns.Count; j++)
            {
                if (j == 0)
                {
                    sBuilder = sBuilder.Append("\"").Append(ConvertObject(dt.Rows[i][j])).Append("\"");
                    //strCSV += "\"" + ConvertObject(dt.Rows[i][j]) + "\"";
                }
                else
                {
                    sBuilder = sBuilder.Append(",\"").Append(ConvertObject(dt.Rows[i][j])).Append("\"");
                    //strCSV += ",\"" + ConvertObject(dt.Rows[i][j]) + "\"";
                }
            }
            sBuilder = sBuilder.Append("\r\n");
            //strCSV += "\r\n";
        }

        byte[] bFile = System.Text.Encoding.GetEncoding("GB2312").GetBytes(sBuilder.ToString());
        Session["ReporFrom"] = bFile;
        Session["reporFileName"] = reportFileName;
        Response.Redirect("ReportForm.aspx");
        //Response.Write("<script language='javascript'>window.open('ReportForm.aspx');</script>");
        //Response.Write("<script language='javascript'>window.open('ReportForm.aspx');</script>");
    }

    protected string ConvertObject(object obj)
    {
        if (obj != null)
        {
            return obj.ToString();
        }
        return string.Empty;
    }

下面是ReportForm.aspx 页面代码

protected void Page_Load(object sender, EventArgs e)
    {
        byte[] bFile = (byte[]) Session["ReporFrom"];
        string reportFileName = Session["reporFileName"].ToString();
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        Response.AddHeader("Content-Disposition", "attachment; filename=" + reportFileName + ".csv");
        Response.ContentType = "application/octet-stream;charset=GB2312";
        Response.AddHeader("Content-length", bFile.Length.ToString());
        Response.BinaryWrite(bFile);
        Response.End();
        Response.Close();
        Session.Remove("ReporFrom");
        Session.Remove("reporFileName");
    }

下面是具体的实例用法：

 Session["Source"] = dt;
 Response.Write("<script language='javascript'>window.open('CSVConvert.aspx');</script>");

CSV Pages Download