C#中獲取DataTable某一列的值轉換為集合

直接使用

//Linq
var l1 = (from d in dt.AsEnumerable() select d.Field<int>("ID")).ToList();
//lambda
var l2 = dt.AsEnumerable().ToList().Select(x => x.Field<int>("ID")).ToList();

//使用orderby關鍵字進行排序

List<string> listJobTitle = (from d in dvBaseInfo.ToTable().AsEnumerable() orderby d.Field<int>("OrderNo") select d.Field<string>("VName")).ToList();

封裝方法

公共方法

/// <summary>

/// 獲取某一列的所有值

/// </summary>

/// <typeparam name="T">列數據類型</typeparam>

/// <param name="dtSource">數據表</param>

/// <param name="filedName">列名</param>

/// <returns></returns>

public static List<T> GetColumnValues<T>(DataTable dtSource,string filedName)

{

　　return (from r in dtSource.AsEnumerable() select r.Field<T>("ID")).ToList<T>();

}

調用

DataTable dt = new DataTable();

List<int> ids= DataTablePro.GetColumnValues<int>(dt, "ID");