DataTable dt = new DataTable("Datas"); DataColumn dc = null; //dt新增列 dc=dt.Columns.Add("id", Type.GetType("System.Int32")); //課件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 ...
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DataTable dt = new DataTable("Datas"); DataColumn dc = null; //dt新增列 dc=dt.Columns.Add("id", Type.GetType("System.Int32")); //課件id dc ...
轉 : 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")); //課件iddc ...
參考鏈接 https://blog.csdn.net/Mj_kk/article/details/90487114 列為數字類型 double total= Convert.ToDouble(datatable.Compute("SUM(需要求和的參數 ...
網上搜了好多,沒找到能用的,自己寫一個,有發現錯誤的給我留言。 ...
https://blog.csdn.net/wangtao19932008/article/details/105455314 獲取第一列數據集合 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 ...