如何在DataTable上使用RowFilter来查找列既不为空又大于/小于某个值的行？

// 创建一个DataTable对象
DataTable dataTable = new DataTable();

// 添加列
dataTable.Columns.Add("ID", typeof(int));
dataTable.Columns.Add("Name", typeof(string));
dataTable.Columns.Add("Age", typeof(int));

// 添加行数据
dataTable.Rows.Add(1, "John", 25);
dataTable.Rows.Add(2, "Jane", DBNull.Value);
dataTable.Rows.Add(3, "Mike", 30);

// 创建一个DataView对象，并绑定到DataTable
DataView dataView = new DataView(dataTable);

// 设置筛选条件
dataView.RowFilter = "Name IS NOT NULL AND Age > 25";

// 遍历筛选结果
foreach (DataRowView rowView in dataView)
{
    DataRow row = rowView.Row;
    Console.WriteLine("ID: {0}, Name: {1}, Age: {2}", row["ID"], row["Name"], row["Age"]);
}