更新选择的记录

using System.Collections.Generic;

List<object> ClassIDs = GVMyClassInfo.GetSelectedFieldValues("ClassID");
foreach (object ClassID in ClassIDs)
{
    DSMyClassInfo.UpdateParameters["ClassID"] = new Parameter("ClassID", TypeCode.String, ClassID.ToString());
    DSMyClassInfo.Update();
 }
 GVMyClassInfo.DataBind();