最近在开发东莞国税网上办税报表系统，用到Infopath service作为表单服务器，后台数据存储采用Oracle，其中涉及了从数据库中取值写入Infopath 表单的需求，代码如下：
/// <summary>
/// 取本年累计
/// </summary>
/// <param name="strTableName">表名</param>
/// <param name="xpn"></param>
/// <param name="xnm"></param>
/// <param name="bizDateBegin">业务期始</param>
/// <param name="NSRSBH">纳税人号</param>
/// <returns></returns>
public static string GetSumValue(XPathNavigator xpn, XmlNamespaceManager xnm, string NSRSBH, int thisYear)
{
ILog log = LogManager.GetLogger("InfoPath");
string SQL;
//int thisyear = DateTime.Now.Year;
SQL = @"select ";
XPathNavigator Xpn = null;
Xpn = xpn.SelectSingleNode("/my:root/my:SumValue1", xnm);
string tablename = Xpn.GetAttribute(@"TableName", Xpn.NamespaceURI);
List<string> Columns = new List<string>();
if (xpn != null)
{
XPathNodeIterator itor = Xpn.SelectChildren(XPathNodeType.Element);
int j = 0;
while (itor.MoveNext())
{
SQL += " sum(" + itor.Current.Name.Substring(0, itor.Current.Name.Length - 2).Replace("my:", "") + ") " + itor.Current.Name.Substring(0, itor.Current.Name.Length - 2).Replace("my:", "") + ",";
Columns.Add(itor.Current.Name.Replace("my:", ""));
j++;
}
SQL = SQL.Substring(0, SQL.Length - 1);
SQL += " from " + tablename + " where SSSQ_Q between to_date('" + thisYear.ToString() + "-1-1','YYYY-MM-DD') and to_date('" + thisYear.ToString() + "-12-31','YYYY-MM-DD') and NSRSBH='" + NSRSBH + "'";
log.Info("[SQL]:" + SQL);
OracleConnection conn = new OracleConnection(ConfigurationManager.AppSettings["FormDate_ConnectionString"]);
try
{
conn.Open();
OracleCommand cmd = conn.CreateCommand();
cmd.CommandText = SQL;
OracleDataReader odr = cmd.ExecuteReader();
if (odr.Read())
{
for (int i = 0; i < odr.FieldCount; i++)
{
NavSetValue(xpn, "/my:root/my:SumValue1/my:" + Columns[i], xnm, ((String.IsNullOrEmpty(odr[i].ToString())) ? "0" : odr[i].ToString()));
}
}
odr.Close();
}
catch (Exception ex)
{
throw ex;
}
finally
{
conn.Close();
}
}
return SQL;
}
前台调用方式：
int thisyear = Convert.ToInt32(Request.QueryString["bizDateBegin"].Substring(0, 4));
Xpn = XmlFormView.XmlForm.MainDataSource.CreateNavigator().SelectSingleNode(Constants.DS_SUMVALUE, XmlFormView.XmlForm.NamespaceManager);
//是否有本年累计
if (Xpn != null)
{
InfopathHelper.GetSumValue(XmlFormView.XmlForm.MainDataSource.CreateNavigator(), XmlFormView.XmlForm.NamespaceManager, Request.QueryString["pid"], thisyear);
}