How to sort dataset on basic of Date.

Try this also.

public DataTable sortDate()
{
DataTable dt = new DataTable();
dt.Columns.Add("Id", typeof(int));
dt.Columns.Add("Date", typeof(DateTime));

dt.Rows.Add(1, System.DateTime.Now);
dt.Rows.Add(2, System.DateTime.Now.AddDays(1));
dt.Rows.Add(3, System.DateTime.Now.AddDays(2));

DataSet ds = new DataSet();
ds.Tables.Add(dt);
ds.Tables[0].DefaultView.Sort = "Date desc";
DataTable dtSort = ds.Tables[0].DefaultView.ToTable();
return dtSort;
}

Suppose you want to sort the first DataTable in the DataSet (ds) on a column called "Date" of type DateTime. Then you can do it as follows:

DataTable dt = ds.Tables[0];