要设置 EnableLinqExpressions="false",搞了3,4个小时没反应,就是没有设置这个
Protected Sub btnSearch_Click(sender As Object, e As EventArgs)
RadGrid1.MasterTableView.FilterExpression = "([" + "UserName" + "] ='" + "xiaoming" + "')"
RadGrid1.MasterTableView.Rebind()
End Sub