c# 数据导出成excel 方法总结 见标红部分

public void ServiceOrderExport(string data)
{
StringBuilder sb = new StringBuilder();
Type entityType = null; ;
PropertyInfo[] entityProperties = null;
var input = data.DeserializeObject<structServiceOrder>();
using (var context = SRVDBHelper.DataContext)
{
sb.Remove(, sb.Length);
var results = context.Usp_SRV_CheckServiceOrder(input.ServiceOrderID, input.AcceptWay,
input.StatusCode, input.Description, input.OneLevelSortID, input.TwoLevelSortID,
input.ThreeLevelSortID, input.AInsNO, input.ACompanyName, input.ADepartmentID,
input.ASectionID, input.AName, input.CInsNO, input.CCompanyName, input.CDepartmentID,
input.CSectionID, input.CreatorName, input.HInsNO, input.HCompanyName, input.HDepartmentID,
input.HSectionID, input.HName, input.CreateDate1, input.CreateDate2, input.FinishDate1,
input.FinishDate2, input.OverDueStatus1,input.OverDueStatus2);
List<Usp_SRV_CheckServiceOrderResult> entitys = null;
if (input.HName !=null)
{
entitys = (from item in results
where item.处理人 != null
select item).ToList();
}
else
{
entitys = results.ToList();
}
//检查实体集合不能为空
if (entitys == null || entitys.Count < )
{
return;
}
//取出第一个实体的所有Propertie
entityType = entitys[].GetType();
entityProperties = entityType.GetProperties();
for (int i = ; i < entityProperties.Length; i++)
{
sb.Append(entityProperties[i].Name);
sb.Append(",");
}
sb.Remove(sb.Length - , );
sb.Append("\r\n");
//将所有entity添加到DataTable中
foreach (object entity in entitys)
{
//检查所有的的实体都为同一类型
if (entity.GetType() != entityType)
{
throw new Exception("要转换的集合元素类型不一致");
}
object[] entityValues = new object[entityProperties.Length];
for (int i = ; i < entityProperties.Length; i++)
{
try
{
entityValues[i] = entityProperties[i].GetValue(entity, null);
sb.Append("\"" + HttpContext.Current.Server.HtmlDecode(entityValues[i].ToString().Replace("\"", "\"\"").
Replace("\n", Environment.NewLine).Replace("<BR>", Environment.NewLine)) + "\"");
sb.Append(",");
}
catch
{
entityValues[i] = string.Empty;
sb.Append("\"" + entityValues[i].ToString() + "\"");
sb.Append(",");
}
}
sb.Remove(sb.Length - , );
sb.Append("\r\n");
}
HttpResponse resp;
resp = System.Web.HttpContext.Current.Response;
resp.Charset = "GB2312";
resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
resp.AppendHeader("Content-Disposition", "attachment;filename=" + string.Format("{0:yyyyMMddHHmmss}", DateTime.Now) + ".csv");
resp.Write(sb);
resp.End();
}
}
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