DataTable dt = new DataTable("Datas"); DataColumn dc = null; //dt新增列 dc=dt.Columns.Add("id", Type.GetType("System.Int32")); //课件id dc ...
DataView dv DataObj.GetBmfzr .Tables .DefaultView dv.Sort bmbh DataTable dt ds.Tables dt.Columns.Add bkzz ,typeof string foreach DataRow rs in dt.Rows string fzr DataRowView drv dv.FindRows new object ...
2014-07-02 16:05 0 3115 推荐指数:
DataTable dt = new DataTable("Datas"); DataColumn dc = null; //dt新增列 dc=dt.Columns.Add("id", Type.GetType("System.Int32")); //课件id dc ...
转 : https://blog.csdn.net/weixin_30639719/article/details/95185742 ...
DataTable dt = new DataTable("Datas"); DataColumn dc = null;//dt新增列dc=dt.Columns.Add("id", Type.GetType("System.Int32")); //课件iddc ...
参考链接 https://blog.csdn.net/Mj_kk/article/details/90487114 列为数字类型 double total= Convert.ToDouble(datatable.Compute("SUM(需要求和的参数 ...
网上搜了好多,没找到能用的,自己写一个,有发现错误的给我留言。 ...
https://blog.csdn.net/wangtao19932008/article/details/105455314 获取第一列数据集合 dt是DataTable var Array = from DataRow dr in dt.Rows select dr[0]; //需要引入 ...
DataTable dtGroupBy = dt_com_sub.AsEnumerable().GroupBy(r => new { BudgetSubjectID = r["BudgetSubjectID"], Subjectid = r["Subjectid"], ItemNo = r ...