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

1 <asp:Repeater ID="rpt" runat="server" onitemdatabound="rep_ItemDataBound">
2     <ItemTemplate>
3         <%#Eval("ID") %>、<%#Eval("Name") %>、<asp:Label ID="lblSex" runat="server" Text=""></asp:Label>
4         <br />
5     </ItemTemplate>
6 </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。

 1 protected void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e)
 2 {
 3     Label lblTopicID = (Label)e.Item.FindControl("lblTopicID");
 4     lblTopicID.Text = ((TopicType)e.Item.DataItem).TopicID.ToString();
 5 
 6     TextBox txtTopicText = (TextBox)e.Item.FindControl("txtTopicText");
 7     txtTopicText.Text = ((TopicType)e.Item.DataItem).Name;
 8 
 9     Label lblCreateTime = (Label)e.Item.FindControl("lblCreateTime");
10     lblCreateTime.Text = ((TopicType)e.Item.DataItem).CreateTime.ToString();
11 
12     Label lblLastUpdateTime = (Label)e.Item.FindControl("lblLastUpdateTime");
13     lblLastUpdateTime.Text = ((TopicType)e.Item.DataItem).LastTime.ToString();
14 }

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。

 1 protected void rpt_ItemCommand(object source, RepeaterCommandEventArgs e)
 2 {
 3     RepeaterItem ri = rpt.Items[e.Item.ItemIndex];    //選中行
 4     Label lblTopicID = (Label)ri.FindControl("lblTopicID");
 5     TextBox txtTopicText = (TextBox)ri.FindControl("txtTopicText");
 6     LinkButton lbUpdateTopic = (LinkButton)ri.FindControl("lbUpdateTopic");
 7 
 8     int topicID = CommonFunc.ToInt(lblTopicID.Text.Trim());
 9     string topicName = txtTopicText.Text.Trim();
10 
11     switch (e.CommandName)
12     {
13         case "top"://置頂
14 
15             break;
16         case "update"://修改
17             
18             break;
19         case "del"://刪除
20 
21             break;
22     }
23 }

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：

 1 protected void lbDeleteUser_Click(object sender, EventArgs e)
 2 {
 3     LinkButton lbUpdateUser = (LinkButton)sender;
 4     RepeaterItem ri = (RepeaterItem)lbUpdateUser.NamingContainer; //獲取當前操做的記錄所在行
 5 
 6     TextBox txtUID = (TextBox)ri.FindControl("txtUID"); //獲取當前行的ID
 7     Label lblCn1Account = (Label)ri.FindControl("lblCn1Account");
 8     Label lbhiddenID = (Label)ri.FindControl("lbhiddenID");
 9 
10     // Do Something
11 }