C# DataTable.Select() 筛选数据 - 夏空 - 博客园
dt2 = dt1.DefaultView.ToTable(true,"ID")
DataTable.Select 模糊查询问题-CSDN论坛
C# 对Datatable排序 https://www.cnblogs.com/Unrmk-LingXing/p/4048990.html
DataTable dt = new DataTable();
dt.Columns.Add("Id");
dt.Columns.Add("Name");
dt.Rows.Add(new object[] { 1, "zhangsan" });
dt.Rows.Add(new object[] { 2, "taoge" });
dt.DefaultView.Sort="Id DESC";//按Id倒序
dt.DefaultView.Sort="Id DESC,Name desc";//按Id倒序和Name倒序
dt = dt.DefaultView.ToTable();//返回一个新的DataTable
修改列字段值
https://blog.csdn.net/liaobc/article/details/6406805?utm_source=blogxgwz6
删除行
http://blog.csdn.net/fuyouche/article/details/23022575
http://blog.csdn.net/ibmfahsion/article/details/7891251
DataTable加工后添加行列,输出求和,百分比的问题
https://bbs.csdn.net/topics/390691169
dr["百分比1"] = (float.Parse(table.Rows[i]["销售成本"].ToString()) / total1).ToString("D2%");
dr["百分比2"] = (float.Parse(table.Rows[i]["销售利润"].ToString()) / total2).ToString("D2%");
if(dt==null)
{
return false;
}
else
{
DataRow[] dataRows = dt.Select(columnName+"='"+fieldData+"'");
if (dataRows.Length.Equals(1))
{
return true;
}
else
{
return false;
}
}