DataTable 判断某列是否有重复的项，替换某行的值

判断是否有重复项

dt.DefaultView.ToTable(true, “列名”).Rows.Count < dt.Rows.Count

替换某行的值

DataRow[] findrows;
findrows = dataTable.Select(“项目名称=’bmianjianxi’”);
if (findrows.Length > 0)
{
findrows[0][“项目值”] = bmjxVal;
}