Repeater數據綁定和操做

Repeater使用詳細指南

ASP.NET WebForm開發中儘可能少用系統提供的runat="server"的服務器控件，尤爲像GridView之類的「重量級」武器，自動生成的ViewState實在讓人不敢恭維。可是用Repeater作數據綁定、展現以及表格記錄處理仍是很方便的。

如頁面要實現下圖效果：

綁定數據

數據能夠用 <%#Eval("字段名")%> 這種形式在 標籤中綁定，參考以前寫的 文章

<asp:Repeater ID="rpt" runat="server" onitemdatabound="rep_ItemDataBound">
    <ItemTemplate>
        <%#Eval("ID") %>、<%#Eval("Name") %>、<asp:Label ID="lblSex" runat="server" Text=""></asp:Label>
        <br />
    </ItemTemplate>
</asp:Repeater>

也能夠用另外一種方式，在CodeBehind方法rpt_ItemDataBound(object sender, RepeaterItemEventArgs e)中進行數據綁定。

protected void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    Label lblTopicID = (Label)e.Item.FindControl("lblTopicID");
    lblTopicID.Text = ((TopicType)e.Item.DataItem).TopicID.ToString();

    TextBox txtTopicText = (TextBox)e.Item.FindControl("txtTopicText");
    txtTopicText.Text = ((TopicType)e.Item.DataItem).Name;

    Label lblCreateTime = (Label)e.Item.FindControl("lblCreateTime");
    lblCreateTime.Text = ((TopicType)e.Item.DataItem).CreateTime.ToString();

    Label lblLastUpdateTime = (Label)e.Item.FindControl("lblLastUpdateTime");
    lblLastUpdateTime.Text = ((TopicType)e.Item.DataItem).LastTime.ToString();
}

操做每條記錄

若是想對每條記錄作操做（修改、刪除、置頂等），能夠在後臺方法rpt_ItemCommand(object source, RepeaterCommandEventArgs e)中進行。

protected void rpt_ItemCommand(object source, RepeaterCommandEventArgs e)
{
    RepeaterItem ri = rpt.Items[e.Item.ItemIndex];    //選中行
    Label lblTopicID = (Label)ri.FindControl("lblTopicID");
    TextBox txtTopicText = (TextBox)ri.FindControl("txtTopicText");
    LinkButton lbUpdateTopic = (LinkButton)ri.FindControl("lbUpdateTopic");

    int topicID = CommonFunc.ToInt(lblTopicID.Text.Trim());
    string topicName = txtTopicText.Text.Trim();

    switch (e.CommandName)
    {
        case "top"://置頂

            break;
        case "update"://修改
            
            break;
        case "del"://刪除

            break;
    }
}

或者使用另外一種方法，在每條記錄的操做按鈕事件上處理，例如：

protected void lbDeleteUser_Click(object sender, EventArgs e)
{
    LinkButton lbUpdateUser = (LinkButton)sender;
    RepeaterItem ri = (RepeaterItem)lbUpdateUser.NamingContainer; //獲取當前操做的記錄所在行

    TextBox txtUID = (TextBox)ri.FindControl("txtUID"); //獲取當前行的ID
    Label lblCn1Account = (Label)ri.FindControl("lblCn1Account");
    Label lbhiddenID = (Label)ri.FindControl("lbhiddenID");

    // Do Something
}