Question

我一般都是ASP.Net，C＃和OOP的新手，我正试图进入关于类，对象，方法等的正确范例。

我想从Repeater.ItemDataBound事件中访问DataTable。我在哪里创建DataTable以便方法可以访问它？我不希望每次调用ItemDataBound时都创建DataTable，只需调用一次。那会是一个单独的类，还是同一个类中的另一个方法，还是别的什么？

我想用它来设置HeaderTemplate Repeater中控件的值。这是我的代码：

public partial class test : System.Web.UI.Page
{

    protected void Page_Load(object sender, EventArgs e)
    {
        int numPages = 3, numItems = 10;

        int[] parentRepeatCnt = Enumerable.Range(0, numPages).ToArray();
        int[] childRepeatCnt = Enumerable.Range(0, numItems).ToArray();

        ParentRepeater.DataSource = parentRepeatCnt;
        ParentRepeater.DataBind();

        foreach (int i in parentRepeatCnt)
        {
            Repeater ChildRepeater = ParentRepeater.Items[i].FindControl("ChildRepeater") as Repeater;
            ChildRepeater.DataSource = childRepeatCnt;
            ChildRepeater.DataBind();
        }
    }

    public void ChildRepeater_ItemDataBound(Object Sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Header)
        {
            Label Label1 = e.Item.FindControl("Label1") as Label;
            // access DataTable here
            Label1.Text = myDataTable.Rows[0]["item"].ToString();
        }

    }
}

另外，请随意批评我现有的代码。谢谢！

Answer 1

public partial class test：System.Web.UI.Page {

public datatable mydatatable = new datatable（）;

protected void Page_Load(object sender, EventArgs e)
{
    int numPages = 3, numItems = 10;

    int[] parentRepeatCnt = Enumerable.Range(0, numPages).ToArray();
    int[] childRepeatCnt = Enumerable.Range(0, numItems).ToArray();

    ParentRepeater.DataSource = parentRepeatCnt;
    ParentRepeater.DataBind();

    foreach (int i in parentRepeatCnt)
    {
        Repeater ChildRepeater = ParentRepeater.Items[i].FindControl("ChildRepeater") as Repeater;
        ChildRepeater.DataSource = childRepeatCnt;
        ChildRepeater.DataBind();
    }
}

public void ChildRepeater_ItemDataBound(Object Sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Header)
    {
        Label Label1 = e.Item.FindControl("Label1") as Label;
        // access DataTable here
        Label1.Text = myDataTable.Rows[0]["item"].ToString();
    }

}

}

可以从Repeater.ItemDataBound访问的DataTable

1 个答案: