请教一个泛型转换问题

[gogocsgogodn]

主要是数据源转换的问题，比如

public class Charting
{
public DataTable DataSource
{
set { _dt = value; }
get { return _dt; }
}
public SeriesCollection SC
{

set { _sc = value; }
get { return _sc; }
}
}
Charting c = new Charting();

//c.DataSource = this.GetDataSource();//
//c.SC = GetSC();
c.CreateStaticPic(this.Chart1);

private DataTable GetDataSource()
{
.....
return an instance of DataTable
}


private SeriesCollection GetSC()
{
.....
return an instance of SeriesCollection
}
上面我定义两种类型的数据源,能不能用一个泛型数据源，然后Charting里只定义个泛型的DataSource，既可以接收datatable类型也可以接收SeriesCollection 类型，泛型没怎么用过，熟悉的兄弟 给个大致思路，谢了

[tabbycat]

你这个不是用泛型来解决的，是用接口来做的

public class Charting
{
private IDataSource _dataSource;

public IDataSource DataSource
{
get
{
return _dataSource;
}

set
{
_dataSource = value;
}
}

public Charting(IDataSource dataSource)
{
this._dataSource = dataSource
}
}

IDataSource 你按自已的需要去选择，可以采用ICollection接口，更强一些的是IEnumerable

[gogocsgogodn]

谢谢

[gogocsgogodn]

IDataSource 具体怎么写呢 报了个错无法将DataTable转换为IEnumerable类型

[_see_you_again_]

 
   public class Charting<T>
    {
        T dataSource;
        public T DataSource
        {
            set { dataSource = value; }
            get { return dataSource; }
        }
    }
Charting<DataTable> c= new Charting<DataTable>();
DataTable dt = chart.DataSource;

Charting<SeriesCollection> c= new Charting<SeriesCollection>();
SeriesCollection sc = chart.DataSource;

[kingtiy]

返回T类型的值。使用的时候，给T指定一个类型就可以了。
public static T GetOneRowOneColValue<T>( string sql)
{
SqlConnection conn = new SqlConnection();
conn.ConnectionString = connString;
conn.Open();
SqlCommand command = new SqlCommand(sql, conn);
command.CommandType = CommandType.Text;
SqlDataReader ReaderTemp = command.ExecuteReader();
if (ReaderTemp != null && ReaderTemp.HasRows)
{
ReaderTemp.Read();
T value = (T)ReaderTemp[0];
return value;
}
else
{
throw new Exception("获取单个值失败");
}

}

[gogocsgogodn]

能不能就我给出的写个大致模型呢