DataSourceSelectArguments 是什么属性？

[OICQshenshi]

    protected string connString = WebConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString;

    //Select员工数据
    public DataView SelectEmployee()
    {
        string strCmd = "Select EmployeeID,LastName,City,Country from Employees";
        SqlDataSource sqlds = new SqlDataSource(connString, strCmd);
        return (DataView)sqlds.Select(DataSourceSelectArguments.Empty);

        //回传DataView
    }

这句MSDN中解释为：
DataSourceSelectArguments 提供一种机制，数据绑定控件可使用这种机制向数据源控件请求在检索数据之后执行与数据相关的操作。无法继承此类。
Empty 获取一个排序表达式设置为System.String.Empty的System.Web.UI.DataSourceSelectArguments对象

还是没有理解，请教下谁能用最通俗的语言来讲解下该语句是什么意思？

(DataView)sqlds.Select(DataSourceSelectArguments.Empty);

[OICQshenshi]

up

[OICQshenshi]

没人知道吗？

[namhyuk]

我也一直没搞懂。

也不用想那么多吧，只要知道SqlDataSource.Select()返回IEnumerable，可以转换为DataView。

而且Select不能没有参数，而参数也只有这一个选择：DataSourceSelectArguments.Empty。

SqlDataSource的Insert()，Update(), Delete()都没参数，只有Select有这莫名其妙的参数。搞不懂。

[OICQshenshi]

求详解

[OICQshenshi]

求详解

[OICQshenshi]

推下

[sunshine_anycall]

字面意思，从datasource中选取数据的参数的意思
select时where里的条件

[xie_yanke]

是添加排序条件的语句.你可以...

sqlds.Select(new DataSourceSelectArguments("[字段] desc, [字段] Asc"));

[一品梅]

Data-bound controls use the DataSourceSelectArguments class to request that a data source control performs additional data-related operations on a result set, such as sorting the data or returning a specific subset of data. These data-related operations are enumerated by the DataSourceCapabilities enumeration. The following table indicates how the DataSourceSelectArguments class supports these data-related operations.

Capability
Related DataSourceSelectArguments properties

DataSourceCapabilities..::.Sort
SortExpression

DataSourceCapabilities..::.Page
StartRowIndex, MaximumRows

DataSourceCapabilities..::.RetrieveTotalRowCount
RetrieveTotalRowCount, TotalRowCount

也就是说DataSourceSelectArguments可以有以上几种枚举值,来筛选数据,用empty就是默认,和原始得到数据相同.

[wh110]

看楼上几位说的然后自己试了下,DataSourceSelectArguments的几种值是用来筛选数据

[htys99]

推下

[pengsuyun1214]

DataSourceSelectArguments

[pengsuyun1214]

不懂 DataSourceSelectArguments