可以在GridView上进行自定义排序吗

从…起 在GridView Web服务器控件中排序数据 在 http://msdn.microsoft.com/en-us/library/hwf94875.aspx

自定义排序

如果默认排序行为不足以满足您的要求,则可以自定义网格的排序行为。自定义排序的基本技术是处理排序事件。在处理程序中,可以执行以下操作:

• 创建自己的排序逻辑。例如,如果您使用的数据源不支持排序, 您可以在自己的代码中执行排序,然后将网格绑定到已排序的数据。

Dim oDataSet As DataSet = GatherDataSet()
Dim oDataTable As DataTable = oDataSet.Tables(0)
Dim oSort1 As New DataView(oDataTable, "Date > #2010/01/13#", "Date, Priority", DataViewRowState.CurrentRows)
Dim oSort2 As New DataView(oDataTable, "Date <= #2010/01/13#", "Priority, Date", DataViewRowState.CurrentRows)
Dim oGridDataTable As DataTable
oGridDataTable = oSort1.ToTable
oGridDataTable.Merge(oSort2.ToTable)

oGridView.DataSource = oGridDataTable

'...
'you can then merge any changes back into the data set, if needed
oDataSet.Merge(oGridDataTable)

向马修致敬,

class DatePriority: IComparable
{
    private DateTime date;
    public DateTime Date
    {
        get { return date; }
    }
    private int priority;
    public int Priority
    {
        get { return priority; }
    }

    public DatePriority(DateTime date, int priority)
    {
        this.date = date;
        this.priority = priority;
    }

    public int CompareTo(object obj)
    {
        if (obj is DatePriority)
        {
            DatePriority comparedDatePriority = obj as DatePriority;

            // Comparison logic
            // If the compared elements are today or before today, order by priority in descending order. Same priorities are ordered by date in ascending order
            // If the compared elements are for the future, order by date in ascending order. Same dates are order by priority in descending order
            if ((this.Date <= DateTime.Today && comparedDatePriority.Date <= DateTime.Today))
            {
                if (Priority == comparedDatePriority.Priority)
                    return Date.CompareTo(comparedDatePriority.Date);
                else
                    return -Priority.CompareTo(comparedDatePriority.Priority);
            }
            else
            {                    
                if (Date == comparedDatePriority.date)
                    return -Priority.CompareTo(comparedDatePriority.Priority); // Descending order
                else
                    return Date.CompareTo(comparedDatePriority.Date);
            }
        }
        throw new ArgumentException("Not a DatePriority");
    }
}    

是的,你能做到。这是你怎么做到的。

    [DataObjectAttribute()]
    public static class UserManager
    {
        [DataObjectMethod(DataObjectMethodType.Select, true)]
        public static UserCollection GetUsers()
        {
            return UserDB.GetAll();
        }

        [DataObjectMethod(DataObjectMethodType.Select, false)]
        public static UserCollection GetUsers(string sortExpression)
        {
            UserCollection users = UserDB.GetAll();
            users.Sort(new EntityComparer<User>(sortExpression));
            return users;
        }
    }

在重载的GetUsers方法中查看这行代码。

users.Sort(new EntityComparer<User>(sortExpression));

下面是我的GridView的外观。。

         <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            DataSourceID="ObjectDataSource1">
            <Columns>
                <asp:BoundField DataField="Id" HeaderText="Id" SortExpression="Id" />
                <asp:BoundField DataField="UserName" HeaderText="UserName" 
                    SortExpression="UserName" />
                <asp:BoundField DataField="Password" HeaderText="Password" 
                    SortExpression="Password" />
                <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
                <asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" />
                <asp:BoundField DataField="CompanyName" HeaderText="CompanyName" 
                    SortExpression="CompanyName" />
            </Columns>
        </asp:GridView>
        <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" 
            OldValuesParameterFormatString="original_{0}" SelectMethod="GetUsers" 
            TypeName="FilePark.BusinessLayer.UserManager"></asp:ObjectDataSource>

dataGrinView的排序过程使用数据源的排序过程。 若要手动对数据排序,请创建实现IBindingListView的类,按照需要实现它的排序方法,并将该类用作DataGridView中的数据源